*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    --border-color: #dbe4f1;
    --heading-color: #16233f;
    --muted-text: #49617f;
    --surface-color: #ffffff;
    --surface-muted: #f7faff;
    --shadow-soft: 0 12px 28px rgba(24, 49, 83, 0.06);
}

html {
    min-width: 0;
    max-width: 100%;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 40px;
    background:
        radial-gradient(circle at top, rgba(167, 188, 230, 0.35), transparent 35%),
        linear-gradient(180deg, #eef4ff 0%, #f8fbff 100%);
    color: #183153;
    line-height: 1.5;
    overflow-x: clip;
}

.tool-icon-sprite {
    display: none;
}

body.has-app-sidebar {
    min-height: 100vh;
    padding: 0;
}

body.has-app-nav {
    min-height: 100vh;
    padding: 0;
}

.screen-reader-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

[hidden] {
    display: none !important;
}

main {
    width: min(100%, 800px);
    max-width: 800px;
    min-width: 0;
    margin: 0 auto;
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(24, 49, 83, 0.08);
}

img,
video,
iframe,
table,
input,
select,
textarea {
    max-width: 100%;
}

.app-shell {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 26px;
    width: 100%;
    min-height: 100vh;
    padding: 24px;
    overflow-x: hidden;
}

.app-shell > main {
    align-self: start;
    width: 100%;
    min-width: 0;
    margin: 0 auto;
}

.has-app-sidebar .back-link {
    display: none;
}

.has-app-nav .back-link {
    display: none;
}

.app-frame {
    display: grid;
    gap: 24px;
    width: 100%;
    max-width: 100%;
    min-height: 100vh;
    min-width: 0;
    padding: 0 0 32px;
    overflow-x: clip;
}

.app-frame > main {
    width: min(calc(100% - clamp(32px, 6vw, 96px)), 1160px);
    max-width: 100%;
    min-width: 0;
    margin: 0 auto;
    padding: clamp(24px, 3vw, 36px);
    overflow-x: clip;
}

body.lesson-authoring-shell {
    overflow: hidden;
    background: #edf3fb;
}

body.lesson-authoring-shell .app-topnav,
body.lesson-authoring-shell .lesson-builder-page > .lesson-builder-nav,
body.lesson-authoring-shell .lesson-builder-page > .lesson-builder-hero,
body.lesson-authoring-shell .lesson-builder-page > .management-status,
body.lesson-authoring-shell .lesson-builder-page > .lesson-builder-overview {
    display: none;
}

body.lesson-authoring-shell .app-frame {
    display: block;
    min-height: 100vh;
    padding: 0;
    overflow: hidden;
}

body.lesson-authoring-shell .app-frame > main.lesson-builder-page {
    width: 100%;
    max-width: none;
    height: 100vh;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.app-topnav {
    position: sticky;
    top: 0;
    z-index: 50;
    display: grid;
    grid-template-columns: minmax(210px, auto) minmax(0, 1fr);
    align-items: center;
    gap: 16px;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    margin: 0;
    padding: 12px clamp(18px, 4vw, 56px);
    border: 0;
    border-radius: 0;
    background: rgba(24, 39, 68, 0.98);
    box-shadow: 0 14px 34px rgba(12, 23, 42, 0.2);
    backdrop-filter: blur(14px);
}

.app-topnav-brand,
.app-topnav-link {
    color: #f8fbff;
    text-decoration: none;
}

.app-topnav-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    max-width: 100%;
}

.app-topnav-mark,
.app-topnav-link-icon,
.app-topnav-account-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    font-weight: 900;
}

.app-topnav-mark {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: #3569d9;
    color: #ffffff;
}

.app-topnav-title-group {
    display: grid;
    gap: 1px;
    min-width: 0;
}

.app-topnav-title,
.app-topnav-role,
.app-topnav-account-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.app-topnav-title {
    color: #ffffff;
    font-size: 0.95rem;
}

.app-topnav-role {
    color: #c6d4ed;
    font-size: 0.78rem;
    font-weight: 800;
}

.app-topnav-menu {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    min-width: 0;
}

.app-topnav-toggle {
    flex: 0 0 auto;
}

.app-topnav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    cursor: pointer;
}

.app-topnav-toggle span {
    position: absolute;
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
    transition: transform 160ms ease, opacity 160ms ease;
}

.app-topnav-toggle span:nth-child(1) {
    transform: translateY(-6px);
}

.app-topnav-toggle span:nth-child(3) {
    transform: translateY(6px);
}

.app-topnav--open .app-topnav-toggle span:nth-child(1) {
    transform: rotate(45deg);
}

.app-topnav--open .app-topnav-toggle span:nth-child(2) {
    opacity: 0;
}

.app-topnav--open .app-topnav-toggle span:nth-child(3) {
    transform: rotate(-45deg);
}

.app-topnav-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    min-width: 0;
}

.app-topnav-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 42px;
    padding: 0 12px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-weight: 900;
    min-width: 0;
}

.app-topnav-link span:last-child,
.app-topnav-account-name {
    min-width: 0;
    overflow-wrap: anywhere;
}

.app-topnav-link:hover,
.app-topnav-link:focus-visible,
.app-topnav-menu-link:hover,
.app-topnav-menu-link:focus-visible {
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
}

.app-topnav-link--active {
    border-color: rgba(255, 255, 255, 0.26);
    background: rgba(255, 255, 255, 0.16);
    color: #ffffff;
}

.app-topnav-link-icon,
.app-topnav-account-avatar {
    width: 28px;
    height: 28px;
    border-radius: 10px;
    background: #eef4ff;
    color: #274a7f;
    font-size: 0.78rem;
}

.app-topnav-link-icon {
    display: none;
}

.app-topnav-account {
    position: relative;
    min-width: 0;
}

.app-topnav-account-summary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    max-width: 210px;
    min-height: 42px;
    padding: 0 12px 0 7px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 999px;
    color: #ffffff;
    font-weight: 900;
    cursor: pointer;
    list-style: none;
}

.app-topnav-account-summary::-webkit-details-marker {
    display: none;
}

.app-topnav-account-summary::after {
    width: 8px;
    height: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    content: "";
    transform: translateY(-2px) rotate(45deg);
}

.app-topnav-account[open] .app-topnav-account-summary {
    border-color: rgba(255, 255, 255, 0.32);
    background: rgba(255, 255, 255, 0.1);
}

.app-topnav-account-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    display: grid;
    gap: 6px;
    min-width: 180px;
    padding: 8px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #ffffff;
    box-shadow: 0 18px 42px rgba(24, 49, 83, 0.14);
}

.app-topnav-menu-link {
    display: flex;
    align-items: center;
    min-height: 42px;
    padding: 0 12px;
    border: 1px solid transparent;
    border-radius: 10px;
    color: #274a7f;
    text-decoration: none;
    font: inherit;
    font-weight: 900;
    text-align: left;
}

.app-topnav-menu-link:hover,
.app-topnav-menu-link:focus-visible {
    border-color: #dbe4f1;
    background: #f7faff;
}

.app-topnav-menu-button {
    width: 100%;
    background: transparent;
    cursor: pointer;
}

.app-topnav-menu-button:disabled {
    cursor: wait;
    opacity: 0.72;
}

.app-sidebar {
    position: sticky;
    top: 24px;
    align-self: start;
    display: grid;
    grid-template-rows: auto 1fr auto;
    gap: 18px;
    max-height: calc(100vh - 48px);
    min-height: calc(100vh - 48px);
    overflow: hidden;
    padding: 18px 16px 14px;
    border: 1px solid #dbe4f1;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 18px 40px rgba(24, 49, 83, 0.08);
}

.app-sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.app-sidebar-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
    border-radius: 12px;
    background: #3569d9;
    color: #ffffff;
    font-weight: 800;
    text-decoration: none;
}

.app-sidebar-title-group {
    display: grid;
    gap: 2px;
    min-width: 0;
}

.app-sidebar-title,
.app-sidebar-role,
.app-sidebar-label,
.app-sidebar-heading {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.app-sidebar-title {
    color: #183153;
    font-size: 0.94rem;
}

.app-sidebar-role {
    color: #49617f;
    font-size: 0.78rem;
    font-weight: 700;
}

.app-sidebar-content {
    display: grid;
    align-content: start;
    gap: 0;
    min-height: 0;
    overflow-y: auto;
    padding-right: 2px;
    scrollbar-gutter: stable;
}

.app-sidebar-section {
    display: grid;
    gap: 8px;
    padding: 14px 0;
    border-top: 1px solid #edf2f8;
}

.app-sidebar-section:first-child {
    padding-top: 4px;
    border-top: 0;
}

.app-sidebar-heading {
    margin: 0;
    color: #6b7f9e;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.app-sidebar-nav {
    display: grid;
    gap: 6px;
}

.app-sidebar-link,
.app-sidebar-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 40px;
    padding: 0 11px;
    border: 1px solid transparent;
    border-radius: 10px;
    background: transparent;
    color: #274a7f;
    font: inherit;
    font-size: 0.94rem;
    font-weight: 800;
    text-align: left;
    text-decoration: none;
    cursor: pointer;
}

.app-sidebar-link:hover,
.app-sidebar-link:focus-visible,
.app-sidebar-toggle:hover,
.app-sidebar-toggle:focus-visible {
    border-color: #dbe4f1;
    background: #f7faff;
}

.app-sidebar-link--active {
    border-color: #bfd0ec;
    background: #eaf2ff;
    color: #183153;
    box-shadow: inset 3px 0 0 #3569d9;
}

.app-sidebar-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex: 0 0 28px;
    border-radius: 10px;
    background: #eef4ff;
    color: #274a7f;
    font-size: 0.78rem;
    font-weight: 900;
}

.app-sidebar-footer {
    display: flex;
    justify-content: center;
    padding-top: 12px;
    border-top: 1px solid #edf2f8;
}

.app-sidebar-link--quiet {
    color: #49617f;
}

.app-shell--collapsed {
    grid-template-columns: 88px minmax(0, 1fr);
}

.app-shell--collapsed .app-sidebar {
    padding: 14px;
}

.app-shell--collapsed .app-sidebar-brand,
.app-shell--collapsed .app-sidebar-link {
    justify-content: center;
}

.app-shell--collapsed .app-sidebar-title-group,
.app-shell--collapsed .app-sidebar-heading,
.app-shell--collapsed .app-sidebar-label {
    display: none;
}

.app-sidebar-toggle {
    justify-content: center;
    width: 44px;
    min-height: 44px;
    padding: 0;
    border-color: #dbe4f1;
    border-radius: 999px;
    background: #f8fbff;
    color: #274a7f;
    box-shadow: 0 10px 22px rgba(24, 49, 83, 0.08);
}

.app-sidebar-toggle-icon {
    width: 10px;
    height: 10px;
    border-top: 2px solid currentColor;
    border-left: 2px solid currentColor;
    transform: rotate(-45deg);
}

.app-shell--collapsed .app-sidebar-toggle-icon {
    transform: rotate(135deg);
}

.auth-layout {
    box-sizing: border-box;
    display: grid;
    gap: 24px;
    max-width: 680px;
    margin: 0 auto;
    padding: 0;
    background: transparent;
    box-shadow: none;
}

.auth-layout *,
.auth-layout *::before,
.auth-layout *::after,
.auth-feedback-shell,
.auth-feedback-shell *,
.auth-feedback-shell *::before,
.auth-feedback-shell *::after {
    box-sizing: border-box;
}

.auth-layout--single {
    min-height: calc(100vh - 80px);
    align-content: center;
}

.auth-layout--single .auth-story {
    display: none;
}

.auth-story,
.auth-card {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
    border: 1px solid rgba(214, 225, 242, 0.95);
    border-radius: 28px;
    box-shadow: 0 24px 60px rgba(24, 49, 83, 0.1);
    width: 100%;
}

.auth-story {
    display: grid;
    gap: 18px;
    padding: 32px;
}

.auth-story-title {
    margin: 0;
    font-size: clamp(2rem, 5vw, 3.75rem);
    line-height: 1.02;
    letter-spacing: -0.04em;
}

.auth-story-copy {
    max-width: 46ch;
    margin-bottom: 0;
}

.auth-benefits {
    display: grid;
    gap: 10px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.auth-benefits li {
    padding: 14px 16px;
    border: 1px solid #dbe4f1;
    border-radius: 16px;
    background: rgba(249, 251, 255, 0.92);
    color: #355075;
    font-weight: 600;
}

.profile-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid #c9d6e8;
    background-color: #e6efff;
    background-position: center;
    background-size: cover;
    color: #274a7f;
    font-weight: 800;
}

.profile-avatar[data-has-image="true"] {
    color: transparent;
}

.profile-avatar--large {
    width: 64px;
    height: 64px;
    font-size: 1.2rem;
}

.profile-avatar--hero {
    width: clamp(78px, 9vw, 104px);
    height: clamp(78px, 9vw, 104px);
    border: 4px solid #ffffff;
    box-shadow: 0 14px 32px rgba(24, 49, 83, 0.16);
    font-size: clamp(1.45rem, 3vw, 2.2rem);
}

.profile-avatar--small {
    width: 32px;
    height: 32px;
    font-size: 0.8rem;
}

.profile-inline {
    display: flex;
    align-items: center;
    gap: 8px;
}

.dashboard-profile-heading {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 0;
}

.profile-page {
    display: grid;
    gap: 18px;
    max-width: 1040px;
    min-width: 0;
}

.profile-hero {
    overflow: hidden;
    border: 1px solid #dbe4f1;
    border-radius: 20px;
    background: #ffffff;
    box-shadow: 0 18px 48px rgba(24, 49, 83, 0.08);
}

.profile-hero-cover {
    min-height: 108px;
    background:
        linear-gradient(135deg, rgba(39, 74, 127, 0.95), rgba(30, 143, 87, 0.86)),
        linear-gradient(90deg, #e6efff, #f1fbf5);
}

.profile-hero-content {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 18px;
    align-items: end;
    padding: 0 clamp(18px, 3vw, 28px) clamp(18px, 3vw, 26px);
    margin-top: -46px;
}

.profile-hero-copy {
    display: grid;
    gap: 8px;
    min-width: 0;
    padding-top: 48px;
}

.profile-hero-title-row {
    display: flex;
    gap: 14px;
    align-items: start;
    justify-content: space-between;
}

.profile-hero-title-row h1 {
    margin: 0;
    font-size: clamp(2rem, 3.5vw, 2.7rem);
    line-height: 1.05;
    overflow-wrap: anywhere;
}

.profile-username {
    margin: 4px 0 0;
    color: #49617f;
    font-weight: 800;
}

.profile-summary .summary-card {
    gap: 6px;
    padding: 14px 16px;
    background: #ffffff;
}

.profile-summary .summary-label {
    font-size: 0.84rem;
}

.profile-summary .summary-value {
    font-size: clamp(1.7rem, 3vw, 2.15rem);
}

.profile-page .intro,
.profile-page .section-copy,
.profile-page .course-muted {
    font-size: 0.95rem;
}

.profile-grid {
    display: grid;
    grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
    gap: 16px;
    align-items: start;
}

.profile-panel {
    gap: 14px;
}

.profile-detail-list {
    display: grid;
    gap: 10px;
    margin: 0;
}

.profile-detail-row {
    display: grid;
    gap: 4px;
    padding: 11px 14px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #f9fbff;
}

.profile-detail-label {
    color: #49617f;
    font-size: 0.84rem;
    font-weight: 800;
}

.profile-detail-value {
    margin: 0;
    color: #183153;
    font-weight: 800;
    overflow-wrap: anywhere;
}

.profile-card-list {
    display: grid;
    gap: 12px;
}

.profile-mini-card {
    display: grid;
    gap: 8px;
    padding: 14px;
    border: 1px solid #dbe4f1;
    border-radius: 18px;
    background: #ffffff;
}

.profile-mini-card__header {
    display: flex;
    gap: 12px;
    align-items: start;
    justify-content: space-between;
}

.profile-mini-card h3 {
    margin: 0;
    font-size: 1.05rem;
}

.profile-activity-item {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) auto auto;
    gap: 10px;
    align-items: center;
    padding: 12px 14px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #f9fbff;
}

.settings-page {
    display: grid;
    gap: 22px;
    width: 100%;
    max-width: 880px;
    min-width: 0;
}

.settings-panel {
    gap: 16px;
}

.settings-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.code-space-page {
    display: grid;
    gap: 22px;
    width: min(calc(100% - clamp(32px, 6vw, 96px)), 1320px);
    max-width: 1320px;
}

.code-space-header {
    align-items: end;
}

.code-space-header-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}

.code-workspace {
    display: grid;
    grid-template-columns:
        minmax(220px, var(--code-instructions-width, 300px))
        8px
        minmax(140px, var(--code-files-width, 190px))
        8px
        minmax(0, 2.45fr);
    min-height: clamp(620px, 72vh, 820px);
    min-width: 0;
    overflow: hidden;
    border: 1px solid #405066;
    border-radius: 18px;
    background: #202a36;
    box-shadow: 0 18px 42px rgba(24, 49, 83, 0.12);
}

.code-instructions-panel,
.code-file-panel,
.code-editor-panel,
.code-console-panel,
.code-work-area {
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}

.code-instructions-panel,
.code-file-panel,
.code-console-panel {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
}

.code-instructions-panel {
    background: #26313d;
    color: #eef4ff;
}

.code-resize-handle {
    position: relative;
    z-index: 2;
    padding: 0;
    border: 0;
    background: #1c2531;
}

.code-resize-handle--instructions,
.code-resize-handle--files {
    width: 8px;
    min-width: 8px;
    border-right: 1px solid #405066;
    border-left: 1px solid #405066;
    cursor: col-resize;
}

.code-resize-handle--instructions::before,
.code-resize-handle--files::before {
    content: "";
    position: absolute;
    inset: 48% 2px auto;
    height: 36px;
    border-radius: 999px;
    background: rgba(238, 244, 255, 0.26);
    transform: translateY(-50%);
}

.code-resize-handle--console {
    width: 100%;
    height: 8px;
    min-height: 8px;
    border-top: 1px solid #405066;
    border-bottom: 1px solid #405066;
    cursor: row-resize;
}

.code-resize-handle--console::before {
    content: "";
    position: absolute;
    inset: 2px auto;
    left: 50%;
    width: 58px;
    border-radius: 999px;
    background: rgba(238, 244, 255, 0.26);
    transform: translateX(-50%);
}

.code-resize-handle:hover,
.code-resize-handle:focus-visible {
    background: #27384a;
    outline: 0;
}

.code-workspace[data-resizing="instructions"] {
    cursor: col-resize;
    user-select: none;
}

.code-workspace[data-resizing="files"] {
    cursor: col-resize;
    user-select: none;
}

.code-workspace[data-resizing="console"] {
    cursor: row-resize;
    user-select: none;
}

.code-instructions-scroll {
    min-height: 0;
    overflow-y: auto;
    padding: 16px;
}

.code-instructions-card {
    display: grid;
    gap: 16px;
    padding: 18px;
    border: 1px solid rgba(238, 244, 255, 0.08);
    border-radius: 12px;
    background: #3a4654;
    color: #f8fbff;
}

.code-instructions-card p,
.code-instructions-card ol {
    margin: 0;
}

.code-instructions-card h3 {
    margin: 0;
    color: #ffffff;
    font-size: 1.45rem;
    line-height: 1.15;
}

.code-instructions-card ol {
    display: grid;
    gap: 14px;
    padding-left: 24px;
}

.code-instructions-card li {
    padding-left: 2px;
}

.code-instructions-card code {
    padding: 2px 5px;
    border: 1px solid rgba(238, 244, 255, 0.22);
    border-radius: 6px;
    background: rgba(15, 23, 42, 0.36);
    color: #ffffff;
}

.code-instruction-tip {
    padding-top: 14px;
    border-top: 1px solid rgba(238, 244, 255, 0.18);
    color: #d7e2f0;
}

.code-file-panel {
    border-right: 1px solid #405066;
    background: #334151;
    color: #eef4ff;
}

.code-work-area {
    display: grid;
    grid-template-rows: minmax(220px, 1fr) 8px minmax(72px, var(--code-console-height, 240px));
}

.code-editor-panel,
.code-console-panel {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
}

.code-console-panel {
    background: #020617;
    color: #dbeafe;
}

.code-panel-header,
.code-editor-toolbar,
.code-console-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px;
    border-bottom: 1px solid #405066;
    background: #26313d;
    color: #eef4ff;
}

.code-console-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}

.code-console-actions .primary-button,
.code-console-actions .secondary-button {
    min-height: 42px;
    padding: 0 18px;
}

.code-run-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    min-width: 46px;
    height: 42px;
    border: 0;
    border-radius: 12px;
    background: #6f4bd8;
    color: #ffffff;
    cursor: pointer;
    box-shadow: 0 10px 22px rgba(60, 35, 130, 0.28);
}

.code-run-button::before {
    content: "";
    width: 0;
    height: 0;
    margin-left: 3px;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 12px solid currentColor;
}

.code-run-button:hover,
.code-run-button:focus-visible {
    background: #7d5bea;
    outline: 3px solid rgba(127, 231, 238, 0.38);
    outline-offset: 2px;
}

.code-run-button:disabled {
    cursor: not-allowed;
    opacity: 0.58;
    box-shadow: none;
}

.code-console-panel[data-minimized="true"] .code-console {
    display: none;
}

.code-panel-header h2,
.code-editor-toolbar h2,
.code-console-toolbar h2 {
    margin: 0;
    color: #f8fbff;
    font-size: 1.05rem;
}

.code-panel-header .eyebrow,
.code-editor-toolbar .eyebrow,
.code-console-toolbar .eyebrow {
    color: #9fb8ee;
}

.code-icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border: 1px solid rgba(238, 244, 255, 0.22);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.08);
    color: #f8fbff;
    font: inherit;
    font-size: 1.35rem;
    font-weight: 900;
    cursor: pointer;
}

.code-icon-button:hover,
.code-icon-button:focus-visible {
    border-color: rgba(238, 244, 255, 0.42);
    background: rgba(255, 255, 255, 0.14);
}

.code-file-list {
    display: grid;
    align-content: start;
    gap: 8px;
    min-height: 0;
    overflow-y: auto;
    padding: 12px;
}

.code-file-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.code-file-button {
    display: grid;
    gap: 3px;
    width: 100%;
    min-height: 56px;
    padding: 10px 12px;
    border: 1px solid transparent;
    border-radius: 12px;
    background: transparent;
    color: #eef4ff;
    font: inherit;
    text-align: left;
    cursor: pointer;
}

.code-file-label {
    display: grid;
    min-width: 0;
}

.code-file-row:hover .code-file-button,
.code-file-button:focus-visible {
    border-color: rgba(238, 244, 255, 0.18);
    background: rgba(255, 255, 255, 0.07);
}

.code-file-button[data-active="true"] {
    border-color: rgba(105, 230, 234, 0.42);
    background: #2f8793;
    box-shadow: inset 3px 0 0 #7fe7ee;
}

.code-file-name {
    overflow: hidden;
    color: #f8fbff;
    font-weight: 900;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.code-file-delete {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    flex: 0 0 auto;
    border: 1px solid rgba(238, 244, 255, 0.18);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    color: #f5b7ad;
    font: inherit;
    font-weight: 900;
    cursor: pointer;
}

.code-file-delete:hover,
.code-file-delete:focus-visible {
    border-color: rgba(244, 180, 169, 0.5);
    background: rgba(178, 55, 42, 0.18);
    outline: 0;
}

.code-file-meta,
.code-editor-meta {
    color: #c7d7ed;
    font-size: 0.82rem;
    font-weight: 800;
}

.code-editor-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    justify-content: flex-end;
}

.code-editor-meta > span {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 0 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    color: #e7f0ff;
}

.code-zoom-controls {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    overflow: hidden;
    border: 1px solid rgba(238, 244, 255, 0.16);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.07);
    color: #e7f0ff;
    font-size: 0.82rem;
    font-weight: 900;
}

.code-zoom-controls .code-icon-button {
    width: 34px;
    height: 34px;
    min-width: 34px;
    border: 0;
    border-radius: 0;
    background: transparent;
    font-size: 1.05rem;
}

.code-zoom-controls span {
    min-width: 50px;
    padding: 0 8px;
    text-align: center;
}

.code-editor-shell {
    position: relative;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    min-height: 0;
    overflow: hidden;
    background: #111827;
}

.code-line-numbers,
.code-highlight,
.code-editor {
    min-height: 100%;
    padding: 18px 0;
    border: 0;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: var(--code-editor-font-size, 0.95rem);
    line-height: 1.7;
    tab-size: 4;
}

.code-line-numbers {
    min-width: 54px;
    overflow: hidden;
    padding-right: 12px;
    padding-left: 12px;
    background: #161f2d;
    color: #8290a5;
    text-align: right;
    user-select: none;
    white-space: pre;
}

.code-editor-layer {
    position: relative;
    min-width: 0;
    min-height: 100%;
    height: 100%;
    overflow: hidden;
    background: #111827;
}

.code-highlight,
.code-editor {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    min-width: 0;
    margin: 0;
    padding-right: 18px;
    padding-left: 18px;
    white-space: pre;
}

.code-highlight {
    overflow: hidden;
    color: #c9d1df;
    pointer-events: none;
}

.code-editor {
    resize: none;
    outline: 0;
    background: transparent;
    color: transparent;
    caret-color: #ffffff;
    overflow: auto;
    -webkit-text-fill-color: transparent;
}

.code-editor::selection {
    background: rgba(90, 130, 210, 0.45);
    -webkit-text-fill-color: transparent;
}

.code-token-keyword {
    color: #cc78bc;
    font-weight: 700;
}

.code-token-type {
    color: #ffc66d;
}

.code-token-function {
    color: #40b6e0;
    font-style: italic;
}

.code-token-string {
    color: #6a8759;
}

.code-token-number {
    color: #6897bb;
}

.code-token-comment {
    color: #7a7f89;
    font-style: italic;
}

.code-suggestions {
    position: absolute;
    top: 58px;
    left: 72px;
    z-index: 4;
    display: grid;
    width: min(320px, calc(100% - 96px));
    overflow: hidden;
    border: 1px solid #405066;
    border-radius: 12px;
    background: #f8fbff;
    box-shadow: 0 18px 38px rgba(5, 13, 28, 0.28);
}

.code-suggestion-button {
    display: grid;
    gap: 2px;
    padding: 10px 12px;
    border: 0;
    border-bottom: 1px solid #dbe4f1;
    background: transparent;
    color: #183153;
    font: inherit;
    text-align: left;
    cursor: pointer;
}

.code-suggestion-button:last-child {
    border-bottom: 0;
}

.code-suggestion-button:hover,
.code-suggestion-button:focus-visible,
.code-suggestion-button[data-active="true"] {
    background: #eaf2ff;
    outline: 0;
}

.code-suggestion-label {
    font-weight: 900;
}

.code-suggestion-detail {
    color: #5b6f8d;
    font-size: 0.82rem;
    font-weight: 750;
}

.code-console {
    min-height: 0;
    margin: 0;
    overflow: auto;
    padding: 16px;
    color: #dbeafe;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.9rem;
    line-height: 1.55;
    white-space: pre-wrap;
}

.code-console:empty::before {
    color: #8ea3bf;
    content: "Run Java or JavaScript to see console output here.";
}

.auth-card {
    padding: clamp(22px, 3vw, 34px);
}

.auth-card--single {
    width: min(100%, 760px);
    padding: clamp(22px, 3.5vw, 40px);
}

.auth-card-header {
    display: grid;
    gap: 10px;
    margin-bottom: 24px;
}

.auth-card-title {
    margin: 0;
    font-size: clamp(2rem, 3.8vw, 3rem);
    line-height: 1.04;
    letter-spacing: 0;
}

.auth-card-copy {
    margin: 0;
    color: #49617f;
    max-width: 42ch;
    font-size: clamp(0.98rem, 1.5vw, 1.08rem);
}

.auth-toggle {
    display: inline-grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    width: 100%;
    padding: 6px;
    margin-bottom: 18px;
    border: 1px solid #dbe4f1;
    border-radius: 999px;
    background: #f5f8ff;
}

.auth-toggle-button {
    min-height: 44px;
    padding: 0 18px;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: #5a708d;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.auth-toggle-button[aria-selected="true"] {
    background: #ffffff;
    color: #183153;
    box-shadow: 0 6px 18px rgba(24, 49, 83, 0.12);
}

.social-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 50px;
    padding: 0 20px;
    border: 1px solid #cfe0ff;
    border-radius: 18px;
    background: linear-gradient(135deg, #eef4ff 0%, #ffffff 100%);
    color: #183153;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.social-button:hover,
.social-button:focus-visible {
    border-color: #a6c0ef;
    background: linear-gradient(135deg, #e7f0ff 0%, #ffffff 100%);
}

.auth-form .primary-button,
.auth-card .primary-button--signup {
    width: 100%;
}

.social-note {
    margin: 10px 0 20px;
    color: #5e7290;
    font-size: 0.95rem;
}

.auth-divider {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 0 22px;
}

.auth-divider::before {
    content: "";
    position: absolute;
    inset: 50% 0 auto;
    border-top: 1px solid #dbe4f1;
}

.auth-divider span {
    position: relative;
    padding: 0 12px;
    background: rgba(255, 255, 255, 0.96);
    color: #5e7290;
    font-size: 0.95rem;
}

.auth-section-title {
    margin: 0 0 16px;
    font-size: 1.1rem;
}

.eyebrow {
    margin: 0 0 8px;
    color: #4568a8;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1 {
    margin: 0 0 12px;
}

.intro {
    margin: 0 0 32px;
    max-width: 56ch;
    overflow-wrap: anywhere;
}

h2 {
    margin: 0 0 16px;
    font-size: 1.1rem;
}

.auth-form {
    display: grid;
    gap: 16px;
    max-width: 100%;
}

.auth-inline-action {
    justify-self: end;
    width: auto;
    min-height: 0;
    margin: -4px 0 0;
    padding: 0;
    border: 0;
    background: transparent;
    color: #4568a8;
    font: inherit;
    font-weight: 800;
    text-decoration: underline;
    text-underline-offset: 4px;
    box-shadow: none;
}

.auth-inline-action:hover,
.auth-inline-action:focus-visible {
    color: #1d3764;
}

.auth-secondary-copy {
    margin: 18px 0 0;
    color: #5e7290;
    font-weight: 650;
    text-align: center;
}

.auth-secondary-copy a {
    color: #4568a8;
    font-weight: 850;
}

.form-field {
    display: grid;
    gap: 8px;
}

.form-field span {
    font-weight: 700;
}

.form-field input,
.form-field select,
.correct-answer-field input,
.correct-answer-field select,
.question-options-field input {
    min-height: 44px;
    padding: 0 14px;
    border: 1px solid #c9d6e8;
    border-radius: 10px;
    font: inherit;
    color: inherit;
    background: #ffffff;
}

.form-field input:focus,
.form-field select:focus,
.correct-answer-field input:focus,
.correct-answer-field select:focus,
.question-options-field input:focus {
    outline: 2px solid #9cb5df;
    outline-offset: 2px;
}

.form-hint {
    color: #5e7290;
    font-size: 0.9rem;
}

.file-preview,
.profile-photo-preview {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border: 1px solid #dbe4f1;
    border-radius: 12px;
    background: #f8fbff;
    color: #355075;
    font-weight: 600;
}

.file-preview img,
.profile-photo-preview img {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid #c9d6e8;
    background: #ffffff;
}

.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: auto;
    min-width: 150px;
    min-height: 50px;
    padding: 0 18px;
    border: 0;
    border-radius: 18px;
    background: #183153;
    color: #ffffff;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 14px 30px rgba(24, 49, 83, 0.16);
}

.primary-button:hover,
.primary-button:focus-visible {
    background: #274a7f;
}

.primary-button:disabled {
    cursor: wait;
    opacity: 0.78;
}

.primary-button[data-loading="true"]::before {
    width: 18px;
    height: 18px;
    margin-right: 10px;
    border: 3px solid rgba(255, 255, 255, 0.38);
    border-top-color: #ffffff;
    border-radius: 50%;
    content: "";
    animation: auth-spin 0.75s linear infinite;
}

.primary-button--signup {
    background: linear-gradient(135deg, #1e8f57 0%, #35b36c 100%);
}

.primary-button--signup:hover,
.primary-button--signup:focus-visible {
    background: linear-gradient(135deg, #187446 0%, #2d9d5f 100%);
}

.auth-status {
    min-height: 24px;
    margin: 16px 0 0;
    color: #49617f;
    font-weight: 600;
}

.auth-status[data-tone="error"] {
    color: #b42318;
}

.auth-status[data-tone="success"] {
    color: #117a37;
}

.auth-feedback-shell {
    position: fixed;
    z-index: 1100;
    inset: 0;
    display: grid;
    place-items: center;
    padding: clamp(14px, 4vw, 24px);
    background: rgba(14, 28, 51, 0.34);
    backdrop-filter: blur(8px);
}

.auth-feedback-shell[hidden] {
    display: none;
}

.auth-feedback-panel {
    display: grid;
    width: min(420px, 100%);
    max-height: calc(100vh - 32px);
    overflow-y: auto;
    justify-items: center;
    gap: 14px;
    padding: clamp(22px, 5vw, 30px);
    border: 1px solid #dbe4f1;
    border-radius: 24px;
    background: #ffffff;
    color: #183153;
    text-align: center;
    box-shadow: 0 28px 70px rgba(24, 49, 83, 0.28);
}

.auth-feedback-icon {
    display: grid;
    width: clamp(48px, 12vw, 58px);
    height: clamp(48px, 12vw, 58px);
    place-items: center;
    border-radius: 50%;
    background: #eaf1ff;
}

.auth-feedback-shell[data-loading="true"] .auth-feedback-icon::before {
    width: 30px;
    height: 30px;
    border: 4px solid #c9d6e8;
    border-top-color: #3f6fda;
    border-radius: 50%;
    content: "";
    animation: auth-spin 0.75s linear infinite;
}

.auth-feedback-shell[data-tone="success"] .auth-feedback-icon {
    background: #e8f8ee;
    color: #117a37;
}

.auth-feedback-shell[data-tone="success"] .auth-feedback-icon::before {
    content: "OK";
    font-size: 1rem;
    font-weight: 900;
}

.auth-feedback-shell[data-tone="error"] .auth-feedback-icon {
    background: #fff0ed;
    color: #b42318;
}

.auth-feedback-shell[data-tone="error"] .auth-feedback-icon::before {
    content: "!";
    font-size: 1.3rem;
    font-weight: 900;
}

.auth-feedback-title {
    margin: 0;
    font-size: clamp(1.18rem, 4vw, 1.35rem);
    line-height: 1.2;
}

.auth-feedback-message {
    margin: 0;
    color: #49617f;
    font-weight: 650;
    line-height: 1.5;
}

.auth-feedback-close {
    width: auto;
    min-width: 120px;
    margin-top: 4px;
}

@keyframes auth-spin {
    to {
        transform: rotate(360deg);
    }
}

.ui-alert {
    margin: 0;
    padding: 14px 16px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #f7faff;
    color: #274a7f;
    font-weight: 700;
}

.ui-alert--success {
    border-color: #b8dfc8;
    background: #f1fbf5;
    color: #117a37;
}

.ui-alert--warning {
    border-color: #f0d2a8;
    background: #fff8ec;
    color: #8a4a10;
}

.ui-alert--error {
    border-color: #efc3c0;
    background: #fff4f3;
    color: #b42318;
}

.ui-toast-container {
    position: fixed;
    z-index: 1000;
    top: 24px;
    right: 24px;
    display: grid;
    width: min(390px, calc(100vw - 48px));
    gap: 12px;
    pointer-events: none;
}

.ui-toast {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 14px;
    align-items: start;
    padding: 15px 16px;
    border: 1px solid #cfdbea;
    border-left: 6px solid #274a7f;
    border-radius: 14px;
    background: #ffffff;
    color: #183153;
    box-shadow: 0 18px 45px rgba(24, 49, 83, 0.2);
    pointer-events: auto;
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.ui-toast--success {
    border-left-color: #1e8f57;
}

.ui-toast--warning {
    border-left-color: #b46512;
}

.ui-toast--error {
    border-left-color: #b42318;
}

.ui-toast--dismissed {
    opacity: 0;
    transform: translateY(-8px);
}

.ui-toast__content {
    display: grid;
    gap: 4px;
}

.ui-toast__title {
    color: #183153;
    font-size: 0.95rem;
    line-height: 1.25;
}

.ui-toast__message {
    margin: 0;
    color: #49617f;
    font-weight: 650;
    line-height: 1.45;
}

.ui-toast__close {
    min-height: 34px;
    padding: 0 12px;
    border: 1px solid #dbe4f1;
    border-radius: 999px;
    background: #f7faff;
    color: #274a7f;
    font: inherit;
    font-size: 0.82rem;
    font-weight: 800;
    cursor: pointer;
}

.ui-toast__close:hover,
.ui-toast__close:focus-visible {
    border-color: #9eb5d7;
    background: #edf4ff;
}

.ui-action-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.ui-action-row--start {
    justify-content: flex-start;
}

.ui-action-row--end {
    justify-content: flex-end;
}

.ui-action-row--between {
    justify-content: space-between;
}

.ui-page-header,
.ui-section-header,
.ui-card__header {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    justify-content: space-between;
}

.ui-page-header__content,
.ui-section-header__content {
    display: grid;
    gap: 8px;
}

.ui-page-header :is(h1, p),
.ui-section-header :is(h2, p),
.ui-card :is(h3, p) {
    margin: 0;
}

.ui-page-header > .ui-action-row,
.ui-section-header > .ui-action-row {
    flex: 0 0 auto;
}

.ui-card {
    display: grid;
    gap: 14px;
    padding: 18px;
    border: 1px solid #dbe4f1;
    border-radius: 16px;
    background: #ffffff;
}

.ui-card__title {
    color: #183153;
    font-size: 1.05rem;
}

.ui-card__copy,
.field-hint {
    color: #536a89;
    line-height: 1.5;
}

.ui-card__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-end;
}

.ui-empty-state {
    margin: 0;
    padding: 18px;
    border: 1px dashed #dbe4f1;
    border-radius: 16px;
    background: #f8fbff;
    color: #536a89;
    font-weight: 700;
}

.ui-empty-state--compact {
    padding: 12px 14px;
    border-radius: 12px;
}

.ui-data-table-shell {
    overflow-x: auto;
    border: 1px solid #dbe4f1;
    border-radius: 16px;
    background: #ffffff;
}

.ui-data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 640px;
}

.ui-data-table th,
.ui-data-table td {
    padding: 14px 16px;
    border-bottom: 1px solid #e7edf6;
    text-align: left;
    vertical-align: top;
}

.ui-data-table th {
    color: #536a89;
    font-size: 0.84rem;
    font-weight: 800;
}

.ui-data-table tr:last-child td {
    border-bottom: 0;
}

.field-error {
    color: #b42318;
    font-size: 0.85rem;
    font-weight: 700;
}

.form-field :is(input, select, textarea)[aria-invalid="true"] {
    border-color: #dc8079;
    outline-color: #dc8079;
}

.ui-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 20;
    display: grid;
    place-items: center;
    padding: 24px;
    background: rgba(24, 49, 83, 0.42);
}

.ui-modal {
    display: grid;
    gap: 16px;
    width: min(520px, 100%);
    padding: 22px;
    border: 1px solid #dbe4f1;
    border-radius: 18px;
    background: #ffffff;
    box-shadow: 0 24px 60px rgba(24, 49, 83, 0.22);
}

.ui-modal-title {
    margin: 0;
}

.ui-modal-body {
    color: #49617f;
}

.ui-tabs {
    display: grid;
    gap: 16px;
}

.ui-tab-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 6px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #f7faff;
}

.ui-tab {
    min-height: 38px;
    padding: 0 14px;
    border: 1px solid transparent;
    border-radius: 10px;
    background: transparent;
    color: #274a7f;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.ui-tab[aria-selected="true"] {
    border-color: #bfd0ec;
    background: #ffffff;
    color: #183153;
}

.ui-tab-panel {
    min-width: 0;
}

.status-list {
    display: grid;
    gap: 12px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.status-item {
    display: grid;
    gap: 4px;
    padding: 16px;
    border: 1px solid #dbe4f1;
    border-radius: 12px;
    background: #f9fbff;
}

.status-title {
    font-size: 1rem;
}

.status-description {
    color: #49617f;
}

.status-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 8px;
}

.status-link {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0 14px;
    border-radius: 999px;
    background: #183153;
    color: #ffffff;
    text-decoration: none;
    font-weight: 700;
}

.status-link:hover,
.status-link:focus-visible {
    background: #274a7f;
}

.dashboard-layout {
    display: grid;
    gap: 28px;
    width: 100%;
    max-width: 1180px;
    min-width: 0;
    overflow-x: clip;
}

.dashboard-header {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 24px;
    min-width: 0;
}

.dashboard-header .intro {
    margin-bottom: 0;
}

.dashboard-new-course-button {
    width: auto;
    min-width: 150px;
}

.dashboard-header-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
    min-width: 0;
}

.dashboard-logout-button {
    min-width: 110px;
}

.dashboard-status {
    min-height: 0;
    margin: -12px 0 0;
}

.dashboard-status:empty {
    display: none;
}

.dashboard-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr));
    gap: 14px;
    min-width: 0;
    max-width: 100%;
}

.dashboard-home-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(220px, 0.8fr);
    gap: 16px;
    min-width: 0;
    max-width: 100%;
}

.dashboard-home-grid[hidden] {
    display: none;
}

.dashboard-home-card {
    display: grid;
    align-content: space-between;
    gap: 18px;
    min-width: 0;
    max-width: 100%;
    padding: 22px;
    border: 1px solid #dbe4f1;
    border-radius: 20px;
    background: #ffffff;
    box-shadow: 0 12px 28px rgba(24, 49, 83, 0.06);
}

.dashboard-home-card--primary {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
}

.dashboard-home-card h2 {
    margin: 0 0 6px;
}

.dashboard-home-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
    min-width: 0;
}

.dashboard-home-actions--start {
    justify-content: flex-start;
}

.summary-card {
    display: grid;
    gap: 8px;
    min-width: 0;
    max-width: 100%;
    padding: 18px;
    border: 1px solid #dbe4f1;
    border-radius: 18px;
    background: #f7faff;
}

.dashboard-layout h1,
.dashboard-layout h2,
.dashboard-layout p,
.summary-label {
    overflow-wrap: anywhere;
}

.summary-label {
    color: #49617f;
    font-size: 0.9rem;
    font-weight: 700;
}

.summary-value {
    font-size: clamp(1.8rem, 4vw, 2.3rem);
    line-height: 1;
}

.dashboard-next-step {
    margin: 0;
    color: #1d3760;
    font-weight: 800;
}

.dashboard-incomplete-note {
    margin: 0;
    color: #9b3c2f;
    font-weight: 800;
}

.dashboard-progress {
    width: 100%;
    height: 10px;
    overflow: hidden;
    border-radius: 999px;
    background: #e9eff8;
}

.dashboard-progress-value {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: #20395f;
}

.student-course-next {
    font-size: 1rem;
    line-height: 1.25;
}

.student-course-progress-section {
    display: grid;
    gap: 12px;
}

.student-course-progress-bar {
    height: 14px;
}

.student-course-header {
    align-items: start;
    display: flex;
    gap: 18px;
    justify-content: space-between;
}

.student-course-layout .lesson-card-header {
    align-items: center;
}

.student-course-layout .lesson-header-actions {
    align-self: center;
}

.student-course-layout .lesson-action {
    min-height: 40px;
    padding: 0 14px;
    border-radius: 12px;
    box-shadow: none;
    text-decoration: none;
}

.lesson-card--locked {
    background: #f8fafc;
}

.lesson-card--locked .lesson-title,
.lesson-card--locked .course-muted {
    color: #61718a;
}

.lesson-action--disabled {
    cursor: not-allowed;
    opacity: 0.72;
}

.lesson-lock-badge {
    border: 1px solid #b8c8df;
    background: #eef4fb;
    color: #274a7f;
}

.lesson-lock-badge--locked {
    border-color: #d8b9b5;
    background: #fff0ee;
    color: #9b3c2f;
}

.student-lesson-number-badge {
    min-width: 96px;
    justify-content: center;
    border: 1px solid #183153;
    background: #183153;
    color: #ffffff;
    font-size: 0.9rem;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0;
    padding: 8px 12px;
}

.course-create-panel {
    padding: 22px;
    border: 1px solid #dbe4f1;
    border-radius: 20px;
    background: #f7faff;
}

.section-header {
    margin-bottom: 16px;
}

.section-header h2,
.section-header h3 {
    margin-bottom: 4px;
}

.section-header h3 {
    margin-top: 0;
    color: #183153;
    font-size: 1.12rem;
}

.section-copy {
    margin: 0;
    color: #49617f;
}

.course-form {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.course-form--setup {
    grid-template-columns: 1fr;
}

.course-setup-section {
    gap: 20px;
}

.course-setup-grid,
.course-form--setup {
    display: grid;
    gap: 18px;
}

.course-setup-card {
    display: grid;
    gap: 16px;
    min-width: 0;
    padding: 18px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #f8fbff;
}

.course-setup-card--access {
    background: #ffffff;
}

.course-details-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.course-thumbnail-card {
    background: #ffffff;
}

.course-thumbnail-grid {
    display: grid;
    grid-template-columns: minmax(260px, 1fr) minmax(260px, 0.8fr);
    gap: 16px;
    align-items: stretch;
}

.course-thumbnail-upload input[type="file"] {
    min-height: 50px;
    padding: 8px;
    color: #49617f;
    font-weight: 700;
}

.course-thumbnail-upload input[type="file"]::file-selector-button {
    min-height: 34px;
    margin-right: 12px;
    padding: 0 14px;
    border: 1px solid #c9d6e8;
    border-radius: 8px;
    background: #ffffff;
    color: #183153;
    cursor: pointer;
    font: inherit;
    font-weight: 800;
}

.course-thumbnail-preview {
    min-height: 100%;
}

.course-thumbnail-preview img {
    width: 72px;
    height: 72px;
    border-radius: 12px;
}

.course-form-actions--setup {
    justify-content: flex-end;
}

.form-field textarea {
    padding: 12px 14px;
    border: 1px solid #c9d6e8;
    border-radius: 10px;
    font: inherit;
    color: inherit;
    background: #ffffff;
    resize: vertical;
}

.form-field textarea:focus {
    outline: 2px solid #9cb5df;
    outline-offset: 2px;
}

.form-field--checkbox {
    align-items: center;
    display: flex;
    flex-direction: row;
    gap: 10px;
}

.form-field--checkbox input {
    width: auto;
}

.form-field--wide {
    grid-column: 1 / -1;
}

.correct-answer-field,
.response-rules-field,
.question-options-field {
    padding: 14px;
    border: 1px solid #dbe4f1;
    border-radius: 12px;
    background: #f7faff;
}

.correct-answer-field legend,
.response-rules-field legend,
.question-options-field legend {
    padding: 0 4px;
    font-weight: 700;
}

.question-option-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
}

.question-option-row label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #334766;
    font-weight: 700;
}

.question-option-row label input {
    min-height: auto;
    width: auto;
    padding: 0;
}

.course-form-actions {
    display: flex;
    gap: 12px;
}

.course-form-actions .primary-button {
    width: auto;
}

.secondary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 16px;
    border: 1px solid #c9d6e8;
    border-radius: 12px;
    background: #ffffff;
    color: #183153;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
}

.secondary-button:hover,
.secondary-button:focus-visible {
    border-color: #9cb5df;
    background: #f7faff;
}

.destructive-button {
    border-color: #efc3c0;
    color: #b42318;
}

.destructive-button:hover,
.destructive-button:focus-visible {
    border-color: #dc8079;
    background: #fff4f3;
}

.secondary-button:disabled {
    cursor: not-allowed;
    opacity: 0.58;
}

.dashboard-section {
    display: grid;
    gap: 8px;
}

.dashboard-section--panel {
    gap: 18px;
    padding: 22px;
    border: 1px solid #dbe4f1;
    border-radius: 20px;
    background: #ffffff;
    box-shadow: 0 12px 28px rgba(24, 49, 83, 0.06);
}

.dashboard-section--panel .section-header {
    margin-bottom: 0;
    padding-bottom: 14px;
    border-bottom: 1px solid #e6edf8;
}

.dashboard-section--panel h2 {
    font-size: 1.25rem;
}

.dashboard-section--courses {
    border-left: 4px solid #3569d9;
}

.dashboard-section--submissions {
    border-left: 4px solid #2f7d5b;
}

.dashboard-section--activity,
.dashboard-section--lesson-work {
    border-left: 4px solid #9a5a18;
}

.dashboard-section--muted {
    padding-top: 8px;
    border-top: 1px solid #e6edf8;
}

.dashboard-join-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 0;
    border-top: 1px solid #e6edf8;
    border-bottom: 1px solid #e6edf8;
}

.dashboard-join-panel[hidden] {
    display: none;
}

.dashboard-join-panel h2 {
    margin: 0;
    font-size: 1.1rem;
}

.dashboard-join-panel .section-copy {
    margin-top: 6px;
}

.dashboard-join-form {
    display: flex;
    align-items: end;
    gap: 12px;
    min-width: min(420px, 100%);
}

.dashboard-join-form .form-field {
    flex: 1;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 330px), 1fr));
    align-items: stretch;
    gap: 18px;
}

.course-card {
    display: grid;
    align-content: start;
    gap: 14px;
    min-width: 0;
    overflow: hidden;
    padding: 20px;
    border: 1px solid #dbe4f1;
    border-left: 4px solid #bfd0ec;
    border-radius: 18px;
    background: #ffffff;
    box-shadow: 0 10px 24px rgba(24, 49, 83, 0.05);
}

.course-card:hover {
    border-left-color: #3569d9;
    box-shadow: 0 14px 30px rgba(24, 49, 83, 0.08);
}

.course-card--link {
    color: inherit;
    text-decoration: none;
}

.course-card--link:focus-visible {
    outline: 3px solid #9cb5df;
    outline-offset: 3px;
}

.course-card--compact {
    grid-template-rows: auto auto 1fr;
    min-height: 230px;
    transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.course-card--compact:hover,
.course-card--compact:focus-visible {
    transform: translateY(-2px);
}

.course-card--compact .course-card-header {
    align-items: flex-start;
}

.course-card--compact .course-muted {
    align-self: end;
    font-weight: 800;
}

.course-grid-toggle-card {
    display: grid;
    align-content: center;
    justify-items: start;
    gap: 14px;
    min-height: 160px;
    padding: 20px;
    border: 1px dashed #bfd0ec;
    border-radius: 18px;
    background: #f7faff;
}

.course-grid-toggle-card .course-muted {
    font-weight: 800;
}

.course-grid-toggle {
    width: auto;
}

.course-card-media {
    min-height: 150px;
    overflow: hidden;
    border-radius: 14px;
    background: #eef4ff;
}

.course-card-thumbnail {
    display: block;
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.course-card-thumbnail-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 150px;
    padding: 16px;
    color: #4568a8;
    font-weight: 800;
    text-align: center;
}

.course-card-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    min-width: 0;
    padding-bottom: 10px;
    border-bottom: 1px solid #eef3fb;
}

.course-title {
    margin: 0;
    font-size: 1.15rem;
    overflow-wrap: anywhere;
}

.badge-row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: flex-end;
    gap: 8px;
    min-width: 0;
}

.badge {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 0 10px;
    border-radius: 999px;
    background: #e6efff;
    color: #274a7f;
    font-size: 0.82rem;
    font-weight: 700;
}

.badge--quiet {
    background: #eef3fa;
    color: #49617f;
}

.course-details,
.course-muted {
    margin: 0;
}

.course-details {
    font-weight: 700;
}

.course-muted {
    color: #49617f;
}

.course-discovery-toggle {
    max-width: 360px;
    margin-top: 12px;
}

.course-access-grid {
    display: grid;
    grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
    gap: 16px;
    align-items: end;
}

.course-access-grid .course-discovery-toggle {
    max-width: none;
    margin-top: 0;
}

.course-access-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}

.course-access-actions .primary-button,
.course-access-actions .secondary-button {
    min-width: 160px;
}

.course-danger-zone {
    display: grid;
    gap: 12px;
    padding-top: 4px;
}

.course-danger-zone summary {
    width: fit-content;
    color: #49617f;
    cursor: pointer;
    font-weight: 900;
}

.course-danger-zone summary:hover,
.course-danger-zone summary:focus-visible {
    color: #183153;
}

.course-danger-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.course-classrooms {
    display: grid;
    gap: 8px;
    padding: 14px;
    border-radius: 14px;
    background: #f7faff;
}

.course-actions--teacher {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.course-actions--teacher .primary-button,
.course-actions--teacher .secondary-button {
    width: auto;
    min-width: 118px;
}

.course-subheading {
    font-size: 0.95rem;
}

.classroom-list,
.submission-list {
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.classroom-item,
.submission-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.classroom-list {
    padding: 14px;
    border: 1px solid #e6edf8;
    border-radius: 14px;
    background: #f7faff;
}

.classroom-item {
    min-height: 34px;
    padding: 8px 10px;
    border-radius: 10px;
    background: #ffffff;
}

.submission-filter-form {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    padding: 16px;
    border: 1px solid #dbe4f1;
    border-radius: 16px;
    background: #ffffff;
}

.submission-filter-form--review {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

.submission-filter-form .form-field {
    gap: 6px;
}

.course-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.course-actions--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 14px;
}

.course-actions-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.course-actions-group--main {
    justify-content: flex-start;
}

.course-actions-group--danger {
    justify-content: flex-end;
}

.course-actions--split .primary-button {
    width: auto;
    min-width: min(280px, 100%);
    min-height: 46px;
    padding: 0 22px;
    border-radius: 14px;
}

.student-classes-layout .dashboard-header {
    align-items: end;
}

.student-class-card__title {
    display: grid;
    gap: 8px;
    min-width: 0;
}

.student-class-card .course-muted {
    max-width: 76ch;
}

.catalog-join-panel {
    display: grid;
    gap: 10px;
    padding: 14px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #f7faff;
}

.catalog-join-panel h4 {
    margin: 0;
    color: #183153;
}

.catalog-class-code-form {
    align-items: end;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.catalog-class-code-form .form-field {
    flex: 1 1 190px;
    min-width: 0;
}

.submission-list {
    padding: 18px;
    border: 1px solid #dbe4f1;
    border-radius: 18px;
    background: #f7faff;
}

.submission-item {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) auto auto;
}

.submission-item--review {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr) auto auto;
}

.submission-item--student-detail {
    grid-template-columns: minmax(0, 1.4fr) auto auto auto;
}

.submission-item--review-page {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) minmax(0, 1.2fr) auto auto auto;
}

.submission-name {
    font-weight: 700;
}

.submission-name {
    color: #365a9b;
    text-decoration: none;
}

.submission-name:hover,
.submission-name:focus-visible {
    text-decoration: underline;
}

.empty-state {
    margin: 0;
    padding: 20px;
    border: 1px dashed #c9d6e8;
    border-radius: 18px;
    color: #49617f;
    background: #f9fbff;
}

.management-layout {
    display: grid;
    gap: 26px;
    width: 100%;
    max-width: 1040px;
    min-width: 0;
}

.management-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
}

.management-header > div:first-child {
    min-width: 0;
}

.back-link {
    color: #4568a8;
    font-weight: 700;
    text-decoration: none;
}

.back-link:hover,
.back-link:focus-visible {
    text-decoration: underline;
}

.management-header .intro {
    margin-bottom: 0;
}

.management-status {
    min-height: 0;
    margin: -10px 0 0;
}

.management-status:empty {
    display: none;
}

.management-section {
    display: grid;
    gap: 18px;
    padding: 22px;
    border: 1px solid #dbe4f1;
    border-radius: 20px;
    background: #ffffff;
}

.management-section--pending {
    background: #f7faff;
}

.section-header--actions {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: start;
}

.management-action {
    width: auto;
    white-space: nowrap;
}

.management-create-form {
    margin-bottom: 2px;
    padding: 20px;
    border: 1px solid #dbe4f1;
    border-radius: 16px;
    background: #f7faff;
}

.management-create-form h3 {
    margin: 0 0 6px;
}

.management-form-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 12px;
    margin: 18px 0;
}

.module-form-grid {
    display: grid;
    gap: 12px;
    margin: 18px 0;
}

.lesson-form-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 12px;
    margin: 18px 0;
}

.lesson-form-grid .form-field:nth-child(2) {
    grid-row: span 2;
}

.content-block-form-grid,
.question-form-grid {
    display: grid;
    gap: 12px;
    margin: 18px 0;
}

.lesson-builder-page {
    width: 100%;
    max-width: none;
    min-height: 100vh;
    margin-inline: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: #edf3fb;
    box-shadow: none;
    box-sizing: border-box;
    overflow: hidden;
    gap: 0;
}

.lesson-builder-page > * {
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
}

.lesson-builder-hero {
    display: grid;
    gap: 8px;
    padding: clamp(22px, 3vw, 30px);
    border: 1px solid #dbe4f1;
    border-radius: 24px;
    background:
        linear-gradient(135deg, rgba(247, 250, 255, 0.96), rgba(255, 255, 255, 0.98)),
        #ffffff;
    box-shadow: none;
}

.lesson-builder-page > .lesson-builder-nav,
.lesson-builder-page > .lesson-builder-hero,
.lesson-builder-page > .lesson-builder-overview {
    display: none;
}

.lesson-builder-hero h1 {
    max-width: 760px;
    margin: 0;
    font-size: clamp(2.1rem, 4vw, 3.45rem);
    line-height: 1.08;
}

.lesson-builder-hero .intro {
    max-width: 760px;
    margin: 0;
}

.lesson-builder-overview {
    display: grid;
    grid-template-columns: minmax(260px, 0.38fr) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
    padding: 16px;
    border: 1px solid #dbe4f1;
    border-radius: 20px;
    background: #ffffff;
    box-shadow: none;
    overflow: hidden;
}

.lesson-builder-overview h2 {
    margin: 0;
    font-size: 1.15rem;
}

.lesson-builder-overview-intro {
    display: grid;
    gap: 8px;
    align-content: start;
    min-width: 0;
}

.lesson-builder-position-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 4px;
}

.lesson-builder-position-pills article {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    min-height: 34px;
    padding: 0 12px;
    border: 1px solid #dfe8f4;
    border-radius: 999px;
    background: #f8fbff;
}

.lesson-builder-position-pills article span {
    color: #667892;
    font-size: 0.68rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.lesson-builder-position-pills article strong {
    color: #183153;
    font-size: 0.96rem;
    line-height: 1.2;
}

.lesson-builder-overview-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    align-items: start;
    align-content: start;
    min-width: 0;
}

.lesson-builder-overview-grid [data-lesson-details] {
    display: grid;
    gap: 4px;
    min-width: 0;
    padding: 14px;
    border: 1px solid #e2e9f4;
    border-radius: 14px;
    background: #f8fbff;
}

.lesson-builder-overview-grid [data-lesson-details] {
    margin-top: 0;
}

.lesson-builder-overview-grid .course-classrooms {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin: 0;
}

.lesson-builder-overview-grid .classroom-item {
    display: grid;
    gap: 5px;
    min-width: 0;
    padding: 12px;
    border: 1px solid #dfe8f4;
    border-radius: 12px;
    background: #ffffff;
}

.lesson-builder-overview-grid .submission-name {
    color: #667892;
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.lesson-builder-overview-grid .course-muted {
    margin: 0;
    color: #183153;
    font-size: 0.88rem;
    line-height: 1.35;
    overflow-wrap: anywhere;
}

.lesson-builder-overview-grid .classroom-item:nth-child(3),
.lesson-builder-overview-grid .classroom-item:nth-child(4) {
    grid-column: span 2;
}

.lesson-builder-authoring {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    height: 100vh;
    min-height: 100vh;
    padding: 0;
    border: 0;
    border-radius: 0;
    background:
        linear-gradient(180deg, rgba(248, 251, 255, 0.98), rgba(234, 242, 252, 0.98)),
        #eef4fb;
    overflow: hidden;
}

.lesson-authoring-topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    display: grid;
    grid-template-columns: minmax(220px, 1fr) auto auto;
    gap: clamp(14px, 2vw, 30px);
    align-items: center;
    min-width: 0;
    min-height: 78px;
    padding: 12px clamp(18px, 2vw, 30px);
    border-bottom: 1px solid #dbe4f1;
    background: #ffffff;
    box-shadow: 0 1px 0 rgba(24, 49, 83, 0.04), 0 8px 22px rgba(24, 49, 83, 0.08);
}

.lesson-authoring-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
}

.lesson-authoring-mark {
    display: inline-grid;
    flex: 0 0 auto;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: linear-gradient(135deg, #4d73df, #7fa2f4);
    color: #ffffff;
    font-size: 0.76rem;
    font-weight: 900;
    letter-spacing: 0.02em;
}

.lesson-authoring-title,
.lesson-authoring-context,
.lesson-authoring-save-state {
    margin: 0;
}

.lesson-authoring-title {
    overflow: hidden;
    color: #183153;
    font-size: 1.02rem;
    font-weight: 900;
    line-height: 1.2;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.lesson-authoring-context {
    overflow: hidden;
    color: #667892;
    font-size: 0.8rem;
    font-weight: 750;
    line-height: 1.25;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.lesson-authoring-status {
    display: inline-flex;
    align-items: center;
    justify-self: center;
    gap: 8px;
    min-width: 0;
    padding: 8px 12px;
    border: 1px solid #e1e9f5;
    border-radius: 999px;
    background: #f7faff;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.lesson-authoring-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: #33865a;
    box-shadow: 0 0 0 4px rgba(51, 134, 90, 0.1);
}

.lesson-authoring-status[data-save-state="saving"] .lesson-authoring-status-dot {
    background: #b7791f;
    box-shadow: 0 0 0 4px rgba(183, 121, 31, 0.12);
}

.lesson-authoring-status[data-save-state="unsaved"] .lesson-authoring-status-dot,
.lesson-authoring-status[data-save-state="error"] .lesson-authoring-status-dot {
    background: #b5322a;
    box-shadow: 0 0 0 4px rgba(181, 50, 42, 0.12);
}

.lesson-authoring-save-state {
    color: #667892;
    font-size: 0.78rem;
    font-weight: 850;
    line-height: 1;
    white-space: nowrap;
}

.lesson-authoring-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    justify-content: flex-end;
    min-width: 0;
}

.lesson-authoring-actions .badge {
    min-height: 36px;
    padding: 8px 13px;
    color: #48617f;
    font-size: 0.78rem;
    font-weight: 850;
    white-space: nowrap;
}

.lesson-authoring-actions .secondary-button {
    min-height: 38px;
    padding: 8px 13px;
    border-radius: 13px;
    white-space: nowrap;
}

.lesson-builder-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) clamp(360px, 25vw, 430px);
    gap: 0;
    align-items: stretch;
    min-width: 0;
    height: auto;
    min-height: 0;
    overflow: hidden;
}

.lesson-builder-main {
    display: grid;
    gap: 18px;
    align-content: start;
    min-width: 0;
    min-height: 0;
    height: 100%;
    padding: clamp(22px, 2.5vw, 40px) clamp(22px, 3.4vw, 58px);
    background:
        linear-gradient(90deg, rgba(24, 49, 83, 0.055) 1px, transparent 1px) 0 0 / 42px 100%,
        #edf3fb;
    overflow-x: auto;
    overflow-y: scroll;
    overscroll-behavior: contain;
    scrollbar-gutter: stable;
    -webkit-overflow-scrolling: touch;
}

.lesson-builder-exit-row {
    display: flex;
    justify-content: flex-start;
    min-width: 0;
    width: min(100%, 1120px);
    max-width: 100%;
    margin-inline: auto;
}

.lesson-builder-back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    max-width: 100%;
    color: #48617f;
    font-size: 0.82rem;
    font-weight: 900;
    line-height: 1;
    text-decoration: none;
}

.lesson-builder-back-link::before {
    content: "\2190";
    font-size: 1rem;
    line-height: 1;
}

.lesson-builder-back-link:hover,
.lesson-builder-back-link:focus-visible {
    color: #183153;
    text-decoration: underline;
    text-underline-offset: 4px;
}

.lesson-page-canvas {
    display: grid;
    gap: 0;
    align-self: start;
    min-width: 0;
    width: min(100%, 1120px);
    max-width: 100%;
    margin-inline: auto;
    padding: 0;
    border: 1px solid #dbe4f1;
    border-radius: 4px;
    background: #ffffff;
    box-shadow: 0 20px 54px rgba(24, 49, 83, 0.12);
    overflow: visible;
}

.lesson-builder-page .lesson-page-toolbar {
    display: none;
}

.lesson-page-toolbar,
.lesson-page-section-header {
    display: flex;
    gap: 14px;
    align-items: center;
    justify-content: space-between;
    padding: 16px 22px;
    background: #ffffff;
    border-bottom: 1px solid #dbe4f1;
    color: #183153;
}

.lesson-page-toolbar h3,
.lesson-page-section-header h4 {
    margin: 0;
    color: inherit;
}

.lesson-page-toolbar .eyebrow,
.lesson-page-section-header .eyebrow {
    color: #4d6cae;
}

.lesson-page-toolbar-title {
    display: grid;
    gap: 4px;
}

.lesson-page-toolbar-title p:last-child {
    margin: 0;
    color: #667892;
    font-size: 0.9rem;
}

.lesson-page-toolbar-actions .badge {
    background: rgba(255, 255, 255, 0.16);
    color: #ffffff;
}

.lesson-page-toolbar-actions {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    align-items: center;
    justify-content: flex-end;
}

.lesson-page-toolbar-actions .secondary-button {
    min-height: 42px;
    padding: 9px 14px;
    white-space: nowrap;
}

.lesson-page-sheet {
    display: grid;
    min-height: 100%;
    padding: 0;
    border: 0;
    border-top: 0;
    border-radius: 0;
    background: #ffffff;
    box-shadow: none;
    overflow: visible;
}

.lesson-builder-page .lesson-page-hero {
    grid-template-columns: minmax(0, 1fr);
    gap: clamp(24px, 3vw, 40px);
    align-items: start;
    padding: clamp(54px, 6vw, 84px) clamp(44px, 6vw, 78px);
    border-bottom: 1px solid #e2e9f4;
    background:
        linear-gradient(135deg, rgba(247, 250, 255, 0.98), rgba(255, 255, 255, 0.96)),
        #ffffff;
    color: #183153;
}

.lesson-builder-page .lesson-page-hero .eyebrow,
.lesson-builder-page .lesson-page-hero h2 {
    grid-column: 1;
}

.lesson-builder-page .lesson-page-hero h2 {
    grid-row: auto;
}

.lesson-builder-page .lesson-page-hero .eyebrow,
.lesson-builder-page .lesson-page-hero p {
    color: #49617f;
}

.lesson-builder-page .lesson-page-hero h2 {
    max-width: 980px;
    color: #183153;
    font-size: clamp(3rem, 5.2vw, 5rem);
    font-weight: 700;
    line-height: 1.04;
    text-wrap: balance;
    overflow-wrap: anywhere;
    word-break: normal;
}

.lesson-builder-page .lesson-page-lesson-meta {
    grid-column: 1;
    grid-row: auto;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    max-width: none;
    align-self: start;
}

.lesson-builder-page .lesson-page-lesson-meta article:nth-child(3) {
    grid-column: auto;
}

.lesson-builder-page .lesson-page-lesson-meta article {
    gap: 7px;
    padding: 14px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #f7faff;
}

.lesson-builder-page .lesson-page-lesson-meta span {
    color: #49617f;
}

.lesson-builder-page .lesson-page-lesson-meta p {
    color: #183153;
    font-size: 0.9rem;
}

.lesson-builder-page .lesson-page-body {
    padding: clamp(34px, 4vw, 56px) clamp(44px, 6vw, 78px);
}

.lesson-builder-page .lesson-page-insert-zone {
    border-radius: 16px;
    background: #f8fbff;
    color: #49617f;
}

.lesson-page-hero {
    display: grid;
    gap: 16px;
    padding: clamp(30px, 4vw, 42px) clamp(24px, 5vw, 52px) clamp(24px, 3vw, 30px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    background: #26313a;
    color: #ffffff;
}

.lesson-page-hero .eyebrow,
.lesson-page-hero p {
    color: rgba(255, 255, 255, 0.86);
}

.lesson-page-hero h2 {
    margin: 0;
    color: #ffffff;
    font-size: clamp(2rem, 4vw, 2.65rem);
    font-weight: 500;
    line-height: 1.12;
    overflow-wrap: anywhere;
}

.lesson-page-hero p {
    margin: 0;
}

.lesson-page-lesson-meta {
    display: grid;
    grid-template-columns: 1.2fr 1.2fr minmax(110px, 0.6fr);
    gap: 14px;
    max-width: 920px;
}

.lesson-page-lesson-meta article {
    display: grid;
    gap: 4px;
}

.lesson-page-lesson-meta span {
    color: rgba(255, 255, 255, 0.68);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.lesson-page-lesson-meta p {
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.92rem;
    line-height: 1.45;
}

.lesson-page-body {
    display: grid;
    gap: 20px;
    align-content: start;
    min-height: 420px;
    padding: clamp(24px, 4vw, 32px) clamp(24px, 5vw, 52px) clamp(36px, 6vw, 60px);
}

.lesson-page-question-canvas,
.lesson-page-data-collection {
    display: grid;
    gap: 16px;
    padding-top: 24px;
    border-top: 1px dashed #d8dee8;
}

.lesson-page-question-canvas:empty,
.lesson-page-data-collection:empty {
    display: none;
}

.lesson-code-space,
.lesson-code-space-preview {
    display: grid;
    grid-template-columns: minmax(160px, 0.28fr) minmax(0, 1fr);
    overflow: hidden;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #111827;
    box-shadow: 0 12px 26px rgba(24, 49, 83, 0.1);
}

.lesson-code-files,
.lesson-code-space-preview-files {
    display: grid;
    align-content: start;
    gap: 10px;
    padding: 14px;
    border-right: 1px solid #2d394b;
    background: #253142;
    color: #dbeafe;
}

.lesson-code-files-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.lesson-code-files-label {
    color: #98aac4;
    font-size: 0.74rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.lesson-code-file-add,
.lesson-code-file-delete {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(219, 234, 254, 0.18);
    border-radius: 9px;
    background: rgba(255, 255, 255, 0.06);
    color: #dbeafe;
    font-weight: 900;
    cursor: pointer;
}

.lesson-code-file-add {
    width: auto;
    min-width: 86px;
    height: 30px;
    padding: 0 10px;
    font-size: 0.74rem;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.lesson-code-file-list {
    display: grid;
    gap: 8px;
}

.lesson-code-file-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: stretch;
    gap: 6px;
}

.lesson-code-file,
.lesson-code-space-preview-files span {
    display: grid;
    gap: 2px;
    overflow: hidden;
    width: 100%;
    padding: 9px 10px;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: #eef4ff;
    font-weight: 900;
    text-align: left;
    text-overflow: ellipsis;
    white-space: nowrap;
    cursor: pointer;
}

.lesson-code-file--active,
.lesson-code-space-preview-files span {
    background: #2f8793;
    box-shadow: inset 3px 0 0 #7fe7ee;
}

.lesson-code-file-meta {
    display: block;
    overflow: hidden;
    color: #b5c5dc;
    font-size: 0.67rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-overflow: ellipsis;
    text-transform: uppercase;
}

.lesson-code-file--active .lesson-code-file-meta {
    color: #e8fbff;
}

.lesson-code-file-delete {
    width: 30px;
    min-width: 30px;
    color: #fecaca;
    font-size: 0.78rem;
}

.lesson-code-file-delete:disabled {
    cursor: not-allowed;
    opacity: 0.35;
}

.lesson-code-file-add:hover,
.lesson-code-file-add:focus-visible,
.lesson-code-file-delete:hover:not(:disabled),
.lesson-code-file-delete:focus-visible:not(:disabled),
.lesson-code-file:hover,
.lesson-code-file:focus-visible {
    outline: 2px solid rgba(127, 231, 238, 0.36);
    outline-offset: 2px;
}

.lesson-code-main {
    display: grid;
    grid-template-rows: auto minmax(220px, 1fr) minmax(100px, 0.42fr);
    min-width: 0;
    min-height: 420px;
}

.lesson-code-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
    border-bottom: 1px solid #2d394b;
    background: #1f2937;
    color: #f8fbff;
}

.lesson-code-run {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    min-width: 42px;
    height: 38px;
    border: 0;
    border-radius: 12px;
    background: #6f4bd8;
    color: #ffffff;
    cursor: pointer;
}

.lesson-code-run::before {
    content: "";
    width: 0;
    height: 0;
    margin-left: 3px;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 12px solid currentColor;
}

.lesson-code-run:hover,
.lesson-code-run:focus-visible {
    background: #7d5bea;
    outline: 3px solid rgba(127, 231, 238, 0.38);
    outline-offset: 2px;
}

.lesson-code-run:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.lesson-code-editor-shell {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    min-height: 0;
    background: #111827;
    overflow: hidden;
}

.lesson-code-lines,
.lesson-code-highlight,
.lesson-code-editor,
.lesson-code-console,
.lesson-code-space-preview-editor {
    margin: 0;
    border: 0;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.9rem;
    line-height: 1.65;
    tab-size: 4;
}

.lesson-code-lines {
    overflow: hidden;
    padding: 14px 10px;
    background: #161f2d;
    color: #8290a5;
    text-align: right;
    user-select: none;
}

.lesson-code-editor-layer {
    position: relative;
    min-width: 0;
    min-height: 100%;
    height: 100%;
    overflow: hidden;
    background: #111827;
}

.lesson-code-highlight,
.lesson-code-editor {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    min-width: 0;
    padding: 14px;
    white-space: pre;
}

.lesson-code-highlight {
    overflow: hidden;
    color: #c9d1df;
    pointer-events: none;
}

.lesson-code-editor {
    margin: 0;
    resize: none;
    outline: 0;
    background: transparent;
    color: transparent;
    caret-color: #ffffff;
    overflow: auto;
    -webkit-text-fill-color: transparent;
}

.lesson-code-editor::selection {
    background: rgba(90, 130, 210, 0.45);
    -webkit-text-fill-color: transparent;
}

.lesson-code-console {
    min-height: 0;
    overflow: auto;
    padding: 14px;
    border-top: 1px solid #2d394b;
    background: #020617;
    color: #dbeafe;
    white-space: pre-wrap;
}

.lesson-code-space-preview {
    min-height: 190px;
    pointer-events: none;
}

.lesson-code-space-preview-editor {
    display: grid;
    align-content: center;
    gap: 4px;
    min-width: 0;
    padding: 18px;
    color: #dbeafe;
}

.lesson-code-space-preview-console {
    grid-column: 1 / -1;
    padding: 12px 14px;
    border-top: 1px solid #2d394b;
    background: #020617;
    color: #8ea3bf;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.86rem;
}

.lesson-page-insert-zone {
    display: flex;
    gap: 12px;
    align-items: center;
    min-height: 96px;
    padding: 18px;
    border: 1px dashed #c8d2df;
    border-radius: 0;
    background: #ffffff;
    color: #49617f;
    transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.lesson-page-insert-zone span:not(.lesson-page-plus) {
    display: block;
    color: #49617f;
    font-size: 0.88rem;
    font-weight: 700;
}

.lesson-page-insert-zone--active {
    border-color: #4d7df2;
    background: #f4f8ff;
    transform: translateY(-1px);
}

.lesson-page-plus {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 999px;
    background: #4d7df2;
    color: #ffffff;
    font-size: 1.25rem;
    font-weight: 900;
    line-height: 1;
    flex: 0 0 auto;
}

.lesson-page-empty {
    min-height: 96px;
    border: 1px dashed #d8dee8;
    border-radius: 0;
    background: #ffffff;
}

.lesson-inline-draft-list {
    display: grid;
    gap: 0;
}

.lesson-inline-block {
    position: relative;
    z-index: 0;
    isolation: isolate;
    display: grid;
    gap: 14px;
    padding: 26px 0;
    border-top: 1px dashed #d8dee8;
    background: #ffffff;
}

.lesson-inline-block:hover,
.lesson-inline-block:focus-within {
    z-index: 5;
}

.lesson-inline-block:first-child {
    border-top: 0;
}

.lesson-inline-toolbar {
    position: absolute;
    z-index: 20;
    top: 12px;
    right: 12px;
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 7px;
    border: 1px solid #d8dee8;
    border-radius: 4px;
    background: #ffffff;
    box-shadow: 0 14px 34px rgba(24, 49, 83, 0.18);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease, transform 0.15s ease;
}

.lesson-inline-block:hover .lesson-inline-toolbar,
.lesson-inline-block:focus-within .lesson-inline-toolbar {
    opacity: 1;
    pointer-events: auto;
}

.lesson-inline-toolbar span {
    color: #667892;
    font-size: 0.72rem;
    font-weight: 900;
    text-transform: uppercase;
}

.lesson-inline-remove {
    padding: 8px 10px;
    border: 1px solid #efc3c0;
    border-radius: 4px;
    background: #fff7f6;
    color: #9d3528;
    cursor: pointer;
    font: inherit;
    font-size: 0.8rem;
    font-weight: 900;
}

.lesson-inline-block-body {
    display: grid;
    gap: 18px;
}

.lesson-inline-two-column {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
    align-items: center;
}

.lesson-inline-columns {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lesson-inline-gallery {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.lesson-inline-media-slot {
    position: relative;
    display: grid;
    place-items: center;
    align-content: center;
    justify-items: center;
    gap: 10px;
    min-height: 150px;
    overflow: hidden;
    border: 1px dashed #cfd8e6;
    background: #fafbfc;
    color: #667892;
    text-align: center;
}

.lesson-inline-media-prompt {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: grid;
    place-content: center;
    justify-items: center;
    gap: 10px;
    padding: 24px;
    pointer-events: none;
}

.lesson-inline-media-prompt > span {
    display: block;
    width: 100%;
    color: #667892;
    font-weight: 800;
    line-height: 1.35;
}

.lesson-inline-media-slot--filled {
    border-style: solid;
    background: #ffffff;
}

.lesson-inline-plus {
    position: relative;
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    margin: 0 auto;
    border: 0;
    border-radius: 999px;
    background: #ffffff;
    box-shadow: 0 8px 22px rgba(24, 49, 83, 0.18);
    color: #183153;
    cursor: pointer;
    font: inherit;
    font-size: 1.6rem;
    pointer-events: auto;
}

.lesson-inline-media-slot--filled .lesson-inline-plus {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 34px;
    height: 34px;
    margin: 0;
    background: rgba(255, 255, 255, 0.92);
    color: #3569d9;
    font-size: 1.2rem;
}

.lesson-inline-media-preview {
    display: grid;
    place-items: center;
    width: 100%;
    min-height: 150px;
}

.lesson-inline-image-preview,
.lesson-inline-video-preview {
    display: block;
    width: 100%;
    min-height: 220px;
    border: 0;
    object-fit: cover;
}

.lesson-inline-video-preview {
    aspect-ratio: 16 / 9;
    min-height: 260px;
}

.lesson-inline-file-preview {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 88px;
    width: min(100%, 420px);
    padding: 18px;
    border: 1px solid #d8dee8;
    border-radius: 4px;
    background: #f8fafc;
    color: #183153;
    font-weight: 900;
    text-decoration: none;
}

.lesson-inline-media-menu {
    position: absolute;
    top: calc(50% + 18px);
    left: 50%;
    z-index: 5;
    display: grid;
    min-width: 160px;
    padding: 8px;
    border: 1px solid #d8dee8;
    border-radius: 4px;
    background: #ffffff;
    box-shadow: 0 12px 28px rgba(24, 49, 83, 0.18);
    transform: translateX(-50%);
}

.lesson-inline-media-menu button {
    padding: 10px;
    border: 0;
    border-radius: 4px;
    background: transparent;
    color: #183153;
    cursor: pointer;
    font: inherit;
    font-weight: 800;
    text-align: left;
}

.lesson-inline-media-menu button:hover,
.lesson-inline-media-menu button:focus-visible {
    background: #f1f5fb;
}

.lesson-inline-text-stack {
    display: grid;
    gap: 8px;
    min-width: 0;
}

.lesson-inline-title,
.lesson-inline-body {
    outline: 2px solid transparent;
    outline-offset: 4px;
}

.lesson-inline-title {
    margin: 0;
    color: #7b9ab0;
    font-size: 2.1rem;
    font-weight: 400;
    line-height: 1.18;
}

.lesson-inline-body {
    margin: 0;
    color: #5c6f87;
    font-size: 1rem;
    line-height: 1.5;
}

[contenteditable="true"]:focus {
    outline-color: #4d7df2;
}

[contenteditable="true"]:empty::before {
    color: #8aa1b7;
    content: attr(data-placeholder);
}

.lesson-inline-divider {
    width: 100%;
    border: 0;
    border-top: 2px solid #d8dee8;
}

.lesson-inline-spacer {
    min-height: 72px;
    border: 1px dashed #d8dee8;
    background: #fbfcfe;
}

.lesson-flashcard-editor {
    display: grid;
    gap: 20px;
    padding: clamp(18px, 3vw, 28px);
    border: 0;
    border-radius: 0;
    background: #f3f6fb;
}

.lesson-flashcard-modal {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: grid;
    place-items: center;
    padding: clamp(16px, 3vw, 36px);
    background: rgba(11, 23, 42, 0.48);
    backdrop-filter: blur(10px);
}

.lesson-flashcard-modal-panel {
    display: grid;
    width: min(1120px, 100%);
    max-height: min(860px, 92vh);
    overflow: auto;
    border: 1px solid #d8e2ef;
    border-radius: 24px;
    background: #ffffff;
    box-shadow: 0 30px 80px rgba(24, 49, 83, 0.28);
}

.lesson-flashcard-modal-header {
    position: sticky;
    top: 0;
    z-index: 2;
    display: flex;
    gap: 18px;
    align-items: center;
    justify-content: space-between;
    padding: 24px clamp(22px, 4vw, 36px);
    border-bottom: 1px solid #e6edf6;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
}

.lesson-flashcard-modal-header h3 {
    margin: 4px 0 0;
    color: #183153;
    font-size: clamp(1.55rem, 2.5vw, 2.2rem);
    line-height: 1.1;
}

.lesson-flashcard-modal-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}

.lesson-flashcard-modal-panel .lesson-flashcard-editor {
    padding: clamp(22px, 4vw, 36px);
    border-radius: 0 0 24px 24px;
}

.lesson-flashcard-title-field input,
.lesson-flashcard-editor-card textarea {
    width: 100%;
    min-width: 0;
    border: 1px solid #cfd8e6;
    border-radius: 12px;
    background: #ffffff;
    color: #183153;
    font: inherit;
    font-weight: 700;
}

.lesson-flashcard-title-field input {
    min-height: 56px;
    padding: 12px 16px;
    border-radius: 14px;
    font-size: 1.05rem;
}

.lesson-flashcard-editor-list {
    display: grid;
    gap: 18px;
}

.lesson-flashcard-editor-card {
    position: relative;
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr) minmax(140px, 168px) 42px;
    gap: 18px;
    align-items: center;
    padding: 24px;
    border: 0;
    border-radius: 20px;
    background: #ffffff;
    box-shadow: 0 14px 30px rgba(24, 49, 83, 0.08);
}

.lesson-flashcard-row-number {
    align-self: start;
    color: #49617f;
    font-size: 1rem;
    font-weight: 900;
    line-height: 1.2;
}

.lesson-flashcard-editor-fields {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 18px;
    min-width: 0;
}

.lesson-flashcard-editor-card .form-field {
    min-width: 0;
}

.lesson-flashcard-editor-card .form-field span {
    color: #667892;
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.lesson-flashcard-editor-card textarea {
    min-height: 72px;
    padding: 15px 16px;
    border-color: transparent;
    border-bottom: 3px solid #dbe4f1;
    border-radius: 10px;
    background: #f7f9fc;
    line-height: 1.35;
    resize: vertical;
}

.lesson-flashcard-editor-card textarea:focus {
    border-bottom-color: #4d6dff;
    outline: 2px solid rgba(77, 109, 255, 0.2);
    outline-offset: 0;
}

.lesson-flashcard-editor-card .lesson-inline-media-slot {
    min-height: 86px;
    border: 2px dashed #cfd8e6;
    border-radius: 14px;
    background: #f8fafc;
}

.lesson-flashcard-editor-card .lesson-inline-media-preview,
.lesson-flashcard-editor-card .lesson-inline-image-preview {
    min-height: 86px;
}

.lesson-flashcard-editor-card .lesson-inline-image-preview {
    min-height: 86px;
    max-height: 86px;
    object-fit: cover;
}

.lesson-flashcard-editor-card .lesson-inline-media-prompt {
    padding: 12px;
}

.lesson-flashcard-editor-card .lesson-inline-media-prompt > span {
    font-size: 0.78rem;
}

.lesson-flashcard-editor-card .lesson-inline-plus {
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
}

.lesson-flashcard-delete {
    align-self: start;
    width: 40px;
    height: 40px;
    border: 1px solid #efc3c0;
    border-radius: 12px;
    background: #fff7f6;
    color: transparent;
    cursor: pointer;
    font: inherit;
    overflow: hidden;
}

.lesson-flashcard-delete::before {
    color: #9d3528;
    content: "×";
    font-size: 1.35rem;
    font-weight: 900;
    line-height: 1;
}

.lesson-flashcard-add {
    justify-self: center;
    min-width: 190px;
    border-radius: 999px;
}

.lesson-flashcard-preview-heading {
    margin: 4px 0 0;
    color: #49617f;
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.lesson-flashcard-editor-preview {
    display: grid;
    min-width: 0;
}

.lesson-page-section {
    display: grid;
    gap: 14px;
    margin: 0 44px;
    padding-top: 8px;
}

.lesson-page-section + .lesson-page-section {
    padding-top: 22px;
    border-top: 1px solid #e7edf6;
}

.lesson-page-section--checkpoints .lesson-content {
    padding: 0;
    border: 0;
    background: transparent;
}

.lesson-builder-draft-list {
    padding: 18px;
    border: 1px solid #dbe4f1;
    border-radius: 12px;
    background: #ffffff;
}

.lesson-builder-draft-list summary {
    display: flex;
    gap: 14px;
    align-items: start;
    justify-content: space-between;
    cursor: pointer;
    list-style: none;
}

.lesson-builder-draft-list summary::-webkit-details-marker {
    display: none;
}

.lesson-builder-draft-list[open] {
    display: grid;
    gap: 12px;
}

.lesson-builder-editor-card,
.lesson-tool-card {
    display: grid;
    gap: 16px;
    padding: 18px;
    border: 1px solid #dbe4f1;
    border-radius: 16px;
    background: #ffffff;
}

.lesson-builder-editor-card {
    scroll-margin-top: 24px;
    border-color: #b7cae8;
    box-shadow: 0 18px 50px rgba(24, 49, 83, 0.08);
}

.lesson-builder-editor-header {
    display: flex;
    gap: 14px;
    align-items: start;
    justify-content: space-between;
}

.lesson-builder-editor-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    justify-content: flex-end;
}

.lesson-editor-close {
    min-height: 34px;
    padding: 8px 12px;
}

.lesson-builder-editor-header h3,
.lesson-tool-card h3 {
    margin: 0;
}

.management-create-form--embedded {
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.builder-mode-field {
    max-width: 280px;
}

.lesson-builder-toolbox {
    position: relative;
    display: grid;
    grid-template-rows: auto auto minmax(0, 1fr);
    gap: 14px;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    height: 100%;
    max-height: none;
    padding: 20px 18px 22px;
    border: 0;
    border-left: 1px solid #dbe4f1;
    border-radius: 0;
    background:
        linear-gradient(180deg, #ffffff, #f8fbff),
        #ffffff;
    box-shadow: none;
    box-sizing: border-box;
    overflow: hidden auto;
}

.lesson-toolbox-header {
    display: grid;
    gap: 3px;
    padding: 2px 2px 0;
}

.lesson-toolbox-header h2 {
    margin: 0;
    color: #183153;
    font-size: 1.28rem;
    line-height: 1.15;
}

.lesson-tool-card {
    display: grid;
    gap: 16px;
    padding: 4px 2px 2px;
    border: 0;
    border-radius: 12px;
    background: transparent;
}

.lesson-tool-card h3 {
    color: #183153;
    font-size: 0.92rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.lesson-tool-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
    gap: 8px;
    padding: 7px;
    border: 1px solid #dbe4f1;
    border-radius: 18px;
    background: #eef4fb;
}

.lesson-tool-tab {
    position: relative;
    min-height: 54px;
    padding: 10px 12px;
    border: 0;
    border-radius: 12px;
    background: transparent;
    color: #49617f;
    cursor: pointer;
    font: inherit;
    font-size: 0.78rem;
    font-weight: 800;
    line-height: 1.15;
    text-align: center;
    transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.lesson-tool-tab:hover,
.lesson-tool-tab:focus-visible {
    background: #eef4fb;
}

.lesson-tool-tab--active {
    background: #183153;
    color: #ffffff;
    box-shadow: 0 10px 22px rgba(24, 49, 83, 0.2);
}

.lesson-tool-tab--active::after {
    content: none;
}

.lesson-tool-window {
    min-height: 0;
    max-height: none;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding-right: 2px;
}

.lesson-tool-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.lesson-tool-grid--compact {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: 0;
}

.lesson-insert-tile {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    min-height: 86px;
    padding: 14px;
    border: 1px solid #dbe4f1;
    border-radius: 18px;
    background: #ffffff;
    color: #183153;
    font: inherit;
    font-weight: 800;
    text-align: left;
    cursor: pointer;
    overflow-wrap: normal;
    box-shadow: 0 8px 18px rgba(24, 49, 83, 0.05);
    transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.lesson-insert-tile span:last-child {
    display: grid;
    gap: 3px;
    min-width: 0;
}

.lesson-insert-tile strong,
.lesson-insert-tile small {
    display: block;
}

.lesson-insert-tile strong {
    color: #183153;
    font-size: 0.94rem;
    line-height: 1.15;
}

.lesson-insert-tile small {
    color: #667892;
    font-size: 0.73rem;
    font-weight: 750;
    line-height: 1.2;
}

.lesson-insert-tile:hover,
.lesson-insert-tile:focus-visible,
.lesson-insert-tile--active {
    border-color: #9cb5df;
    background: #ffffff;
    box-shadow: 0 12px 24px rgba(24, 49, 83, 0.11);
    transform: translateY(-1px);
}

.lesson-insert-icon {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: #eaf2ff;
    color: #254f9f;
    font-size: 0.92rem;
    font-weight: 900;
}

.lesson-insert-icon svg,
.lesson-tool-icon svg {
    width: 22px;
    height: 22px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.lesson-insert-tile:nth-child(2) .lesson-insert-icon,
.lesson-insert-tile:nth-child(5) .lesson-insert-icon {
    background: #edf7f1;
    color: #2f7046;
}

.lesson-insert-tile:nth-child(3) .lesson-insert-icon,
.lesson-insert-tile:nth-child(6) .lesson-insert-icon {
    background: #fff4df;
    color: #8a5a12;
}

.lesson-tool-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #49617f;
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.lesson-tool-heading h3 {
    margin: 0;
    color: inherit;
    font-size: inherit;
}

.lesson-layout-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.lesson-layout-tile {
    min-height: 82px;
    padding: 8px;
    border: 1px solid #d8dee8;
    border-radius: 0;
    background: #ffffff;
    cursor: pointer;
}

.lesson-layout-tile:hover,
.lesson-layout-tile:focus-visible,
.lesson-layout-tile--active {
    border-color: #4d7df2;
    box-shadow: inset 0 0 0 1px #4d7df2;
}

.layout-preview {
    display: block;
    width: 100%;
    height: 64px;
    background: #f8fafc;
}

.layout-preview--text {
    background:
        linear-gradient(#93a2b8 0 0) 18px 18px / 58% 5px no-repeat,
        linear-gradient(#d6deeb 0 0) 18px 30px / 72% 4px no-repeat,
        linear-gradient(#d6deeb 0 0) 18px 40px / 50% 4px no-repeat,
        #ffffff;
}

.layout-preview--image-text {
    background:
        linear-gradient(#d6deeb 0 0) 12px 13px / 26px 26px no-repeat,
        linear-gradient(#93a2b8 0 0) 48px 17px / 44% 5px no-repeat,
        linear-gradient(#d6deeb 0 0) 48px 29px / 36% 4px no-repeat,
        linear-gradient(#d6deeb 0 0) 48px 39px / 50% 4px no-repeat,
        #ffffff;
}

.layout-preview--feature {
    background:
        linear-gradient(#d6deeb 0 0) 50% 28px / 48px 26px no-repeat,
        #ffffff;
}

.layout-preview--columns {
    background:
        linear-gradient(#d6deeb 0 0) 16px 16px / 22% 34px no-repeat,
        linear-gradient(#d6deeb 0 0) 50% 16px / 22% 34px no-repeat,
        linear-gradient(#d6deeb 0 0) calc(100% - 16px) 16px / 22% 34px no-repeat,
        #ffffff;
}

.layout-preview--gallery {
    background:
        linear-gradient(#d6deeb 0 0) 10px 16px / 18% 28px no-repeat,
        linear-gradient(#d6deeb 0 0) 35% 16px / 18% 28px no-repeat,
        linear-gradient(#d6deeb 0 0) 62% 16px / 18% 28px no-repeat,
        linear-gradient(#d6deeb 0 0) calc(100% - 10px) 16px / 18% 28px no-repeat,
        #ffffff;
}

.layout-preview--wide {
    background:
        linear-gradient(#d6deeb 0 0) 12px 18px / 30% 22px no-repeat,
        linear-gradient(#93a2b8 0 0) 48% 18px / 30% 5px no-repeat,
        linear-gradient(#d6deeb 0 0) 48% 31px / 38% 4px no-repeat,
        #ffffff;
}

.lesson-tool-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.lesson-tool-button {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    min-height: 90px;
    padding: 14px;
    border: 1px solid #dbe4f1;
    border-radius: 18px;
    background: #ffffff;
    color: #183153;
    font: inherit;
    text-align: left;
    cursor: pointer;
}

.lesson-tool-button:active {
    cursor: pointer;
}

.lesson-tool-button:hover,
.lesson-tool-button:focus-visible {
    border-color: #9cb5df;
    background: #ffffff;
    box-shadow: 0 10px 20px rgba(24, 49, 83, 0.09);
}

.lesson-tool-button--active {
    border-color: #3569d9;
    background: #f7faff;
    box-shadow: inset 3px 0 0 #3569d9, 0 10px 20px rgba(24, 49, 83, 0.09);
}

.lesson-tool-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: #eaf2ff;
    color: #254f9f;
    font-size: 0.74rem;
    font-weight: 900;
}

.lesson-tool-button--simple {
    grid-template-columns: 44px minmax(0, 1fr);
    min-height: 90px;
    color: #183153;
    font-weight: 800;
}

.lesson-tool-button[data-question-tool="code_space"] {
    grid-column: 1 / -1;
}

.lesson-tool-card--details summary {
    cursor: pointer;
    font-weight: 900;
    list-style: none;
}

.lesson-tool-card--details summary::-webkit-details-marker {
    display: none;
}

.lesson-tool-button strong,
.lesson-tool-button small {
    display: block;
}

.lesson-tool-button strong {
    color: #183153;
    font-size: 0.92rem;
    line-height: 1.2;
}

.lesson-tool-button small {
    color: #49617f;
    font-size: 0.73rem;
    font-weight: 700;
    line-height: 1.25;
}

.text-format-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.section-subheading {
    margin: 4px 0 0;
}

.module-list {
    display: grid;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: modules;
}

.module-card {
    display: grid;
    gap: 16px;
    padding: 18px;
    border: 1px solid #dbe4f1;
    border-radius: 16px;
    background: #f7faff;
}

.student-module-card > summary {
    cursor: pointer;
    list-style-position: inside;
}

.student-module-card > summary::-webkit-details-marker {
    color: #49617f;
}

.student-module-progress-badge {
    min-width: 168px;
    justify-content: center;
    border: 1px solid #9cb5df;
    background: #ffffff;
    color: #183153;
    font-size: 0.9rem;
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
    padding: 10px 14px;
    text-align: center;
    white-space: normal;
}

.module-card[draggable="true"] {
    cursor: grab;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.module-card[draggable="true"]:active {
    cursor: grabbing;
}

.module-card--dragging {
    border-style: dashed;
    opacity: 0.45;
}

.module-card--collapsed {
    gap: 10px;
}

.module-card-header {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px;
    align-items: start;
}

.module-lessons {
    display: grid;
    gap: 12px;
    padding-top: 14px;
    border-top: 1px solid #dbe4f1;
}

.module-lessons-header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
}

.module-lessons-header h4 {
    margin: 0;
}

.module-collapse-summary {
    margin: 0;
    color: #49617f;
    font-weight: 700;
}

.module-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.module-drag-hint {
    align-self: center;
    color: #49617f;
    font-size: 0.9rem;
    font-weight: 700;
}

.management-layout .lesson-action {
    align-items: center;
    display: inline-flex;
    justify-content: center;
    min-height: 40px;
    min-width: 0;
    padding: 8px 12px;
    text-align: center;
    white-space: nowrap;
}

.lesson-action-group {
    align-items: center;
    display: flex;
    flex: 1 1 280px;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-end;
    min-width: 0;
}

.lesson-action-group .lesson-action {
    flex: 1 1 108px;
}

.lesson-reorder-controls {
    align-items: center;
    background: #f7f9fd;
    border: 1px solid #e3eaf5;
    border-radius: 12px;
    display: flex;
    flex: 1 1 260px;
    flex-wrap: wrap;
    gap: 8px;
    min-width: 0;
    padding: 4px;
}

.lesson-move-label {
    color: #49617f;
    font-size: 0.85rem;
    font-weight: 800;
    margin: 0 2px 0 6px;
    white-space: nowrap;
}

.lesson-position-select {
    flex: 0 0 72px;
    min-height: 42px;
    min-width: 64px;
    border: 1px solid #d7e2f1;
    border-radius: 10px;
    background: #ffffff;
    color: #1f3556;
    font: inherit;
    font-weight: 700;
    padding: 0 10px;
}

.lesson-move-button {
    flex: 0 0 auto;
    min-height: 42px;
    padding: 8px 12px;
}

.lesson-list {
    display: grid;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.lesson-card {
    display: grid;
    gap: 12px;
    padding: 12px 14px;
    border: 1px solid #e3eaf5;
    border-radius: 12px;
    background: #ffffff;
}

.management-layout .lesson-card {
    gap: 10px;
    padding: 14px 16px;
    overflow: hidden;
}

.lesson-card[draggable="true"] {
    cursor: grab;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.lesson-card[draggable="true"]:active {
    cursor: grabbing;
}

.lesson-card--dragging {
    border-style: dashed;
    opacity: 0.45;
}

.lesson-card-header {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: start;
}

.management-layout .lesson-card-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
    align-items: start;
}

.management-layout .lesson-header-actions {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-start;
    max-width: 100%;
    min-width: 0;
    width: 100%;
}

.lesson-drag-hint {
    color: #49617f;
    font-size: 0.85rem;
    font-weight: 700;
}

.management-layout .lesson-title {
    margin: 0 0 5px;
    font-size: 1.02rem;
    line-height: 1.25;
}

.management-layout .lesson-card-header > div:first-child {
    min-width: 0;
    width: 100%;
}

.management-layout .lesson-card-header > div:first-child > .course-muted {
    display: -webkit-box;
    line-height: 1.4;
    margin: 0;
    max-width: 72ch;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.lesson-meta-row {
    justify-content: flex-start;
    margin-top: 8px;
}

.lesson-content {
    display: grid;
    gap: 10px;
    padding-top: 12px;
    border-top: 1px solid #e3eaf5;
}

.lesson-content-header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
}

.lesson-content-header h6 {
    margin: 0;
    font-size: 0.95rem;
}

.content-block-list,
.question-list {
    display: grid;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.question-phase-section {
    gap: 12px;
}

.content-block-card,
.question-card {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 6px 12px;
    padding: 12px;
    border: 1px solid #edf1f7;
    border-radius: 10px;
    background: #f7faff;
}

.question-card-header {
    display: flex;
    grid-column: 1 / -1;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    min-width: 0;
}

.question-card-header .question-prompt {
    min-width: 0;
    margin: 0;
    overflow-wrap: anywhere;
}

.question-card-header .badge {
    flex: 0 1 auto;
    max-width: 100%;
    white-space: normal;
}

.question-card--placeholder {
    border-color: #4d7df2;
    border-style: dashed;
    background: #f5f8ff;
}

.lesson-page-sheet .content-block-card,
.lesson-page-sheet .question-card {
    padding: 28px 0;
    border: 0;
    border-top: 1px dashed #dbe4f1;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.lesson-page-sheet .question-card {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    min-width: 0;
    overflow: hidden;
}

.lesson-page-sheet .question-card-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    justify-items: start;
}

.lesson-page-sheet .question-card-header .badge {
    max-width: 100%;
    margin-left: 0;
}

.lesson-page-sheet .question-card > .badge,
.lesson-page-sheet .question-card > .question-instructions,
.lesson-page-sheet .question-card > .question-preview-options,
.lesson-page-sheet .question-card > .question-matching-preview,
.lesson-page-sheet .question-card > .question-ordering-preview,
.lesson-page-sheet .question-card > textarea,
.lesson-page-sheet .question-card > .content-block-actions {
    grid-column: 1 / -1;
    min-width: 0;
}

.lesson-page-sheet .question-card > .badge {
    justify-self: start;
    max-width: 100%;
    white-space: normal;
}

.lesson-page-sheet .content-block-card:first-child,
.lesson-page-sheet .question-card:first-child {
    border-top: 0;
}

.lesson-page-sheet .content-block-card > .badge,
.lesson-page-sheet .content-block-card--layout > .content-block-title {
    display: none;
}

.lesson-page-sheet .content-block-actions {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid #edf1f7;
}

.content-block-card[draggable="true"],
.question-card[draggable="true"] {
    cursor: grab;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.content-block-card[draggable="true"]:active,
.question-card[draggable="true"]:active {
    cursor: grabbing;
}

.content-block-card--dragging,
.question-card--dragging {
    border-style: dashed;
    opacity: 0.45;
}

.content-block-title {
    margin: 0;
    font-size: 0.95rem;
}

.content-block-body {
    grid-column: 1 / -1;
    margin: 0;
    white-space: pre-wrap;
}

.content-block-layout-preview {
    display: grid;
    grid-template-columns: minmax(220px, 0.82fr) minmax(0, 1fr);
    gap: 28px;
    align-items: center;
    width: 100%;
    white-space: normal;
}

.content-block-layout-media {
    display: grid;
    min-width: 0;
}

.content-block-layout-copy {
    display: grid;
    gap: 8px;
    min-width: 0;
    color: #49617f;
}

.content-block-layout-copy h4,
.content-block-layout-copy p {
    margin: 0;
}

.content-block-layout-copy h4 {
    color: #183153;
    font-size: clamp(1.55rem, 2.6vw, 2.2rem);
    font-weight: 600;
    line-height: 1.15;
}

.content-block-embed-preview {
    display: grid;
    width: 100%;
    white-space: normal;
}

.content-block-embed-preview iframe {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    min-height: 280px;
    border: 1px solid #dbe4f1;
    border-radius: 8px;
    background: #f7faff;
}

.lesson-layout-columns-preview {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(18px, 3vw, 34px);
    width: 100%;
    white-space: normal;
}

.lesson-layout-text-preview {
    display: grid;
    gap: 10px;
    width: 100%;
}

.lesson-layout-text-preview h3,
.lesson-layout-text-preview h4,
.lesson-layout-text-preview p {
    margin: 0;
}

.lesson-layout-text-preview h3,
.lesson-layout-text-preview h4 {
    color: #183153;
    font-size: clamp(1.55rem, 2.6vw, 2.25rem);
    font-weight: 600;
    line-height: 1.18;
}

.lesson-layout-text-preview--wide {
    max-width: 78ch;
}

.lesson-layout-column {
    display: grid;
    align-content: start;
    gap: 8px;
    min-width: 0;
}

.lesson-layout-column h3,
.lesson-layout-column h4,
.lesson-layout-column p {
    margin: 0;
}

.lesson-layout-column h3,
.lesson-layout-column h4 {
    color: #183153;
    font-size: clamp(1.35rem, 2.4vw, 2rem);
    font-weight: 600;
    line-height: 1.18;
}

.lesson-layout-column p {
    color: #49617f;
    line-height: 1.5;
}

.lesson-layout-gallery-preview {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    width: 100%;
}

.lesson-layout-gallery-preview img {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 5;
    border: 1px solid #dbe4f1;
    border-radius: 4px;
    object-fit: cover;
    background: #f7faff;
}

.lesson-layout-feature-preview {
    display: grid;
    width: 100%;
}

.lesson-layout-feature-preview img {
    display: block;
    width: 100%;
    max-height: 520px;
    border-radius: 8px;
    object-fit: cover;
    background: #f7faff;
}

.content-block-actions {
    display: flex;
    flex-wrap: wrap;
    grid-column: 1 / -1;
    gap: 8px;
}

.content-block-drag-hint {
    align-self: center;
    color: #49617f;
    font-size: 0.85rem;
    font-weight: 700;
}

.content-block-image-preview {
    display: block;
    max-width: min(100%, 420px);
    max-height: 240px;
    border-radius: 8px;
    object-fit: contain;
}

.question-prompt {
    margin: 0;
    font-size: 0.95rem;
}

.question-instructions {
    grid-column: 1 / -1;
    margin: 0;
}

.question-drag-hint {
    align-self: center;
    color: #49617f;
    font-size: 0.85rem;
    font-weight: 700;
}

.question-option-list {
    display: grid;
    grid-column: 1 / -1;
    gap: 6px;
    margin: 0;
    padding-left: 22px;
    color: #334766;
}

.question-option-list li {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.question-preview-response {
    grid-column: 1 / -1;
    min-height: 96px;
    padding: 10px 12px;
    border: 1px solid #d8e2f0;
    border-radius: 8px;
    background: #fff;
    color: #49617f;
    font: inherit;
    resize: vertical;
}

.question-preview-blank {
    grid-column: 1 / -1;
    min-height: 44px;
    padding: 0 12px;
    border: 1px solid #d8e2f0;
    border-radius: 8px;
    background: #fff;
    color: #49617f;
    font: inherit;
}

.question-preview-options {
    display: grid;
    grid-column: 1 / -1;
    gap: 8px;
    margin: 0;
    padding: 0;
    border: 0;
}

.lesson-question-editor-popover {
    position: fixed;
    right: 332px;
    top: 92px;
    z-index: 40;
    width: min(560px, calc(100vw - 48px));
    max-height: calc(100vh - 124px);
    overflow: auto;
    box-shadow: 0 24px 60px rgba(24, 49, 83, 0.24);
}

.lesson-question-editor-popover .content-block-form-grid {
    grid-template-columns: 1fr;
    gap: 12px;
}

.lesson-question-editor-popover textarea {
    min-height: 0;
}

.question-settings-panel {
    display: grid;
    gap: 10px;
    padding: 12px;
    border: 1px solid #dbe4f1;
    border-radius: 10px;
    background: #f8fafc;
}

.question-settings-panel summary {
    cursor: pointer;
    color: #183153;
    font-weight: 900;
}

.question-settings-grid {
    display: grid;
    gap: 12px;
    margin-top: 12px;
}

.question-matching-preview {
    display: grid;
    grid-column: 1 / -1;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 8px 12px;
    margin: 0;
}

.question-matching-preview dt,
.question-matching-preview dd {
    margin: 0;
    padding: 8px 10px;
    border: 1px solid #d8e2f0;
    border-radius: 8px;
    background: #fff;
}

.question-ordering-preview {
    display: grid;
    grid-column: 1 / -1;
    gap: 8px;
    margin: 0;
    padding-left: 22px;
    color: #334766;
}

.question-rating-scale {
    grid-template-columns: repeat(5, max-content);
}

.question-preview-option {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #334766;
}

.question-preview-option input {
    width: auto;
}

.empty-state--compact {
    margin: 0;
    padding: 14px;
}

.primary-button:disabled {
    cursor: not-allowed;
    opacity: 0.58;
}

.dashboard-summary--compact {
    max-width: 420px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-list {
    display: grid;
    gap: 10px;
    margin: 0;
    padding-left: 20px;
    color: #49617f;
}

.lesson-view-layout {
    max-width: 1180px;
}

.lesson-builder-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.lesson-view-header {
    display: grid;
    gap: 10px;
    margin-bottom: 24px;
}

.teacher-preview-banner {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding: 16px;
    border: 1px solid #c9d6e8;
    border-radius: 12px;
    background: #f7faff;
}

.teacher-preview-banner[hidden] {
    display: none;
}

.teacher-preview-banner div {
    display: grid;
    gap: 4px;
    min-width: min(100%, 340px);
}

.teacher-preview-banner strong,
.teacher-preview-banner p {
    margin: 0;
}

.teacher-preview-banner strong {
    color: #183153;
}

.teacher-preview-banner p {
    color: #49617f;
}

.teacher-preview-banner .primary-button {
    width: auto;
    min-width: 190px;
}

.split-learning-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.75fr);
    gap: 20px;
    align-items: start;
}

.lesson-view-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    align-items: start;
    padding-bottom: 32px;
}

.lesson-view-content,
.lesson-view-sidebar {
    display: grid;
    gap: 16px;
}

.lesson-view-sidebar {
    position: sticky;
    top: 20px;
    max-height: calc(100vh - 40px);
    overflow: auto;
    padding-left: 4px;
}

.lesson-view-panel-heading h2 {
    margin-bottom: 4px;
}

.lesson-renderer,
.lesson-question-flow {
    display: grid;
    gap: 0;
}

.lesson-render-block,
.lesson-flow-card,
.lesson-submit-card {
    display: grid;
    gap: 10px;
    padding: 18px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #ffffff;
    box-shadow: 0 12px 28px rgba(24, 49, 83, 0.06);
}

.lesson-render-block {
    padding: 30px 0;
    border: 0;
    border-top: 1px dashed #dbe4f1;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.lesson-render-block:first-child {
    border-top: 0;
}

.lesson-render-block > .badge {
    display: none;
}

.lesson-submit-card--page {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 420px);
    gap: 8px 24px;
    align-items: end;
    max-width: none;
    margin: 28px -52px -60px;
    padding: 24px 52px 32px;
    border: 0;
    border-top: 4px solid #183153;
    border-radius: 0;
    background: #f8fafc;
    box-shadow: none;
}

.lesson-submit-card--page h3,
.lesson-submit-card--page [data-save-status],
.lesson-submit-card--page [data-submit-status] {
    grid-column: 1;
}

.lesson-submit-card--page h3 {
    align-self: end;
}

.lesson-submit-card--page [data-save-status],
.lesson-submit-card--page [data-submit-status] {
    max-width: 620px;
}

.lesson-submit-card--page .lesson-draft-actions,
.lesson-submit-card--page [data-turn-in-button],
.lesson-submit-card--page [data-next-lesson-link] {
    grid-column: 2;
}

.lesson-submit-card--page .lesson-draft-actions {
    align-self: end;
}

.lesson-render-block--text,
.lesson-render-block--youtube,
.lesson-render-block--slides,
.lesson-render-block--link,
.lesson-render-block--file {
    border-left: 0;
}

.lesson-hub-section {
    display: grid;
    gap: 22px;
}

.lesson-hub-summary {
    margin: 0;
}

.lesson-hub-filter-form {
    display: grid;
    grid-template-columns: minmax(220px, 1.4fr) repeat(2, minmax(180px, 1fr));
    gap: 14px;
    align-items: end;
    padding: 18px;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    background: var(--surface-muted);
}

.lesson-hub-course-list,
.lesson-hub-module-list,
.lesson-hub-lesson-list {
    display: grid;
    gap: 16px;
    min-width: 0;
}

.lesson-hub-course-card,
.lesson-hub-module,
.lesson-hub-lesson-card {
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--surface-color);
}

.lesson-hub-course-card {
    display: grid;
    gap: 18px;
    padding: 20px;
    border-radius: 20px;
    box-shadow: var(--shadow-soft);
}

.lesson-hub-course-header,
.lesson-hub-module-header,
.lesson-hub-lesson-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 16px;
    align-items: start;
}

.lesson-hub-course-copy,
.lesson-hub-module-title,
.lesson-hub-lesson-copy {
    min-width: 0;
}

.lesson-hub-course-copy h2,
.lesson-hub-module-title h3,
.lesson-hub-lesson-copy h4 {
    margin: 0 0 6px;
}

.lesson-hub-course-copy p,
.lesson-hub-module-title p,
.lesson-hub-lesson-copy p {
    margin: 0;
    color: var(--muted-text);
}

.lesson-hub-course-meta,
.lesson-hub-lesson-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.lesson-hub-module {
    display: grid;
    gap: 14px;
    padding: 16px;
    border-radius: 16px;
    background: var(--surface-muted);
}

.lesson-hub-lesson-card {
    padding: 16px;
    border-radius: 14px;
}

.lesson-hub-lesson-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    justify-items: stretch;
    width: clamp(190px, 22vw, 240px);
    min-width: 0;
}

.lesson-hub-action {
    width: 100%;
    min-width: 0;
    min-height: 42px;
    white-space: nowrap;
    box-shadow: none;
}

.teacher-courses-layout {
    gap: 22px;
    max-width: 1120px;
}

.teacher-courses-layout .dashboard-summary--compact {
    max-width: none;
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.teacher-course-list {
    display: grid;
    gap: 18px;
    min-width: 0;
}

.teacher-course-card {
    display: grid;
    gap: 18px;
    min-width: 0;
    overflow: hidden;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    background: var(--surface-color);
    box-shadow: var(--shadow-soft);
}

.teacher-course-card-header {
    display: grid;
    gap: 16px;
    align-items: start;
}

.teacher-course-card-copy {
    display: grid;
    gap: 8px;
    min-width: 0;
}

.teacher-course-title-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 14px;
    align-items: start;
}

.teacher-course-title-group {
    min-width: 0;
}

.teacher-course-card-copy h3 {
    margin: 0 0 8px;
    color: var(--heading-color);
    font-size: clamp(1.1rem, 1.8vw, 1.45rem);
}

.teacher-course-card-copy .course-details,
.teacher-course-card-copy .course-muted {
    margin: 0;
}

.teacher-course-description {
    max-width: 76ch;
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.teacher-course-metrics {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 10px;
    min-width: 0;
}

.teacher-course-metric {
    display: grid;
    gap: 4px;
    min-width: 0;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--surface-muted);
}

.teacher-course-metric strong {
    color: var(--heading-color);
    font-size: 1.35rem;
    line-height: 1;
}

.teacher-course-metric span {
    color: var(--muted-text);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

.teacher-course-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-start;
    min-width: 0;
}

.teacher-course-actions .primary-button,
.teacher-course-actions .secondary-button {
    min-width: 142px;
    justify-content: center;
    white-space: normal;
}

.teacher-course-classrooms {
    display: grid;
    gap: 10px;
    min-width: 0;
}

.teacher-course-classrooms h3 {
    margin: 0;
    color: var(--heading-color);
    font-size: 1rem;
}

.teacher-course-classroom-list {
    display: grid;
    gap: 8px;
    min-width: 0;
}

.teacher-course-classroom-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: center;
    min-width: 0;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--surface-muted);
}

.teacher-course-classroom-item div {
    display: grid;
    gap: 2px;
    min-width: 0;
}

.teacher-course-classroom-item strong,
.teacher-course-classroom-item span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.teacher-course-classroom-item strong {
    color: var(--heading-color);
}

.teacher-course-classroom-item span {
    color: var(--muted-text);
    font-weight: 700;
}

.lesson-render-block h3,
.lesson-flow-card h3,
.lesson-submit-card h3 {
    margin: 0;
    color: #16233f;
}

.lesson-render-text,
.lesson-flow-card p,
.lesson-submit-card p,
.lesson-embed-fallback {
    margin: 0;
    color: #49617f;
    white-space: pre-wrap;
}

.lesson-render-rich-text {
    display: grid;
    gap: 10px;
    white-space: normal;
}

.lesson-render-rich-text p,
.lesson-render-list {
    margin: 0;
}

.lesson-render-list {
    display: grid;
    gap: 6px;
    padding-left: 22px;
}

.lesson-render-subheading {
    margin: 0;
    color: #16233f;
    font-size: 1rem;
}

.lesson-inline-link {
    color: #365a9b;
    font-weight: 700;
}

.lesson-embed-shell {
    display: grid;
    gap: 8px;
}

.lesson-embed-status {
    margin: 0;
    color: #6f7f98;
    font-size: 0.9rem;
    font-weight: 700;
}

.lesson-embed-status[data-state="loaded"] {
    color: #3b7f70;
}

.lesson-embed-status[data-state="error"] {
    color: #9d3838;
}

.lesson-embed-shell iframe {
    width: 100%;
    min-height: 360px;
    border: 1px solid #dbe4f1;
    border-radius: 12px;
    background: #eef4ff;
}

.lesson-render-image {
    display: block;
    width: 100%;
    max-height: 420px;
    border-radius: 8px;
    object-fit: contain;
    background: #f7faff;
}

.lesson-render-block--media-text {
    gap: 14px;
}

.lesson-render-media-text {
    display: grid;
    grid-template-columns: minmax(240px, 0.84fr) minmax(0, 1fr);
    gap: clamp(22px, 4vw, 42px);
    align-items: center;
}

.lesson-render-media-frame {
    display: grid;
    min-width: 0;
}

.lesson-render-media-copy {
    display: grid;
    gap: 12px;
    min-width: 0;
}

.lesson-render-media-copy h3 {
    color: #183153;
    font-size: clamp(1.75rem, 3vw, 2.6rem);
    font-weight: 600;
    line-height: 1.15;
}

.lesson-render-media-copy .lesson-render-rich-text {
    color: #49617f;
}

.lesson-render-block audio {
    width: 100%;
}

.lesson-flashcards {
    display: grid;
    gap: 12px;
    min-width: 0;
}

.lesson-flashcard-viewport {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) 44px;
    gap: 12px;
    align-items: center;
}

.lesson-flashcard-arrow {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 1px solid #dbe4f1;
    border-radius: 999px;
    background: #ffffff;
    color: #183153;
    cursor: pointer;
    font: inherit;
    font-size: 1.7rem;
    font-weight: 900;
    line-height: 1;
    box-shadow: 0 8px 18px rgba(24, 49, 83, 0.08);
}

.lesson-flashcard-arrow:disabled {
    cursor: default;
    opacity: 0.45;
}

.lesson-flashcard-card {
    display: grid;
    width: 100%;
    min-height: 280px;
    padding: 0;
    border: 1px solid #dbe4f1;
    border-radius: 20px;
    background: #ffffff;
    color: #183153;
    cursor: pointer;
    font: inherit;
    text-align: center;
    box-shadow: 0 18px 36px rgba(24, 49, 83, 0.1);
    transform-style: preserve-3d;
    transition:
        background-color 180ms ease,
        border-color 180ms ease,
        box-shadow 180ms ease,
        transform 180ms ease;
    will-change: transform;
}

.lesson-flashcard-card:hover,
.lesson-flashcard-card:focus-visible {
    border-color: #b9c8dc;
    box-shadow: 0 22px 44px rgba(24, 49, 83, 0.14);
    transform: translateY(-1px);
}

.lesson-flashcard-card--revealed {
    border-color: #cfdcf2;
    background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
}

.lesson-flashcard-card--flipping {
    animation: lessonFlashcardFlip 280ms ease;
}

@keyframes lessonFlashcardFlip {
    0% {
        transform: rotateY(0deg) scale(1);
    }

    45% {
        transform: rotateY(8deg) scale(0.985);
    }

    100% {
        transform: rotateY(0deg) scale(1);
    }
}

.lesson-flashcard-face {
    display: grid;
    place-items: center;
    gap: 12px;
    min-width: 0;
    padding: clamp(22px, 4vw, 42px);
}

.lesson-flashcard-kicker,
.lesson-flashcard-hint,
.lesson-flashcard-count {
    color: #667892;
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.lesson-flashcard-text {
    max-width: 24ch;
    color: #183153;
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    font-weight: 850;
    line-height: 1.05;
    overflow-wrap: anywhere;
}

.lesson-flashcard-image {
    display: block;
    width: min(100%, 360px);
    max-height: 210px;
    border-radius: 14px;
    object-fit: contain;
    background: #f5f8fd;
}

@media (prefers-reduced-motion: reduce) {
    .lesson-flashcard-card {
        transition: none;
    }

    .lesson-flashcard-card--flipping {
        animation: none;
    }
}

.lesson-flashcard-count {
    justify-self: center;
    letter-spacing: 0;
    text-transform: none;
}

.lesson-resource-link {
    justify-self: start;
    color: #365a9b;
    font-weight: 700;
}

.lesson-flow-question-list {
    display: grid;
    gap: 10px;
    margin: 0;
    padding-left: 20px;
}

.lesson-flow-question-list p {
    margin: 4px 0 0;
}

.lesson-flow-question-list li {
    display: grid;
    gap: 8px;
    padding: 10px;
    border-radius: 10px;
}

.lesson-flow-question--missing {
    border: 1px solid #efc3c0;
    background: #fff6f5;
}

.lesson-required-warning {
    margin: 0;
    color: #b42318;
    font-weight: 700;
}

.lesson-answer-grid {
    display: grid;
    gap: 10px;
}

.lesson-answer-field {
    gap: 6px;
}

.lesson-draft-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.lesson-submit-card .primary-button,
.lesson-submit-card .secondary-button {
    width: 100%;
    justify-content: center;
    text-decoration: none;
}

.submission-review-layout {
    max-width: 1040px;
}

.submission-summary-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.summary-value--small {
    font-size: 1.1rem;
}

.submission-answer-list {
    display: grid;
    gap: 16px;
}

.submission-answer-section {
    display: grid;
    gap: 12px;
}

.submission-answer-card {
    display: grid;
    gap: 10px;
    padding: 16px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #ffffff;
}

.submission-answer-card h4 {
    margin: 0;
}

.submission-answer-card .badge-row {
    justify-content: start;
}

.submission-answer-text {
    margin: 0;
    color: #334766;
    white-space: pre-wrap;
}

.submission-feedback-form {
    display: grid;
    gap: 14px;
}

.submission-feedback-state {
    align-self: center;
    font-weight: 700;
}

.submission-review-summary-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
}

.submission-coverage-card {
    grid-column: span 2;
}

.submission-coverage-card progress {
    width: 100%;
    accent-color: #365a9b;
}

.analytics-layout {
    max-width: 1120px;
}

.analytics-summary-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 14px;
}

.analytics-table-shell {
    overflow-x: auto;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #ffffff;
}

.analytics-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 820px;
}

.analytics-table th,
.analytics-table td {
    padding: 14px;
    border-bottom: 1px solid #e6edf8;
    text-align: left;
    vertical-align: middle;
}

.analytics-table th {
    color: #49617f;
    font-size: 0.88rem;
}

.analytics-table tbody tr:last-child td {
    border-bottom: 0;
}

.analytics-range-control {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 18px;
}

.analytics-range-control [aria-pressed="true"] {
    border-color: #365a9b;
    background: #365a9b;
    color: #ffffff;
}

.analytics-card-action {
    width: fit-content;
    min-height: 36px;
    margin-top: 4px;
    padding: 0 12px;
}

.analytics-record-cell {
    display: grid;
    gap: 4px;
    min-width: 220px;
}

.analytics-action-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.analytics-export-preview {
    display: grid;
    gap: 8px;
    margin-top: 14px;
}

.analytics-export-preview[hidden] {
    display: none;
}

.analytics-export-preview textarea {
    width: 100%;
    min-height: 180px;
    resize: vertical;
}

.analytics-breakdown-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.analytics-breakdown-card {
    display: grid;
    gap: 12px;
    padding: 16px;
    border: 1px solid #dbe4f1;
    border-radius: 8px;
    background: #ffffff;
}

.analytics-breakdown-title {
    margin: 0;
    color: #1d3760;
    font-size: 1rem;
}

.analytics-breakdown-row {
    display: grid;
    grid-template-columns: minmax(82px, 1fr) auto;
    gap: 6px 10px;
    align-items: center;
}

.analytics-breakdown-label {
    color: #334766;
    font-weight: 800;
}

.analytics-breakdown-value {
    color: #1d3760;
    font-size: 0.95rem;
}

.analytics-breakdown-track {
    grid-column: 1 / -1;
    height: 10px;
    overflow: hidden;
    border-radius: 999px;
    background: #edf3fb;
}

.analytics-breakdown-fill {
    display: block;
    height: 100%;
    min-width: 2px;
    border-radius: inherit;
    background: #365a9b;
}

.analytics-breakdown-fill--success {
    background: #2f7d5b;
}

.analytics-breakdown-fill--warning {
    background: #b77a20;
}

.analytics-breakdown-fill--danger {
    background: #ba3b2f;
}

.analytics-trend-shell {
    display: grid;
    gap: 14px;
    margin-bottom: 16px;
    padding: 16px;
    border: 1px solid #dbe4f1;
    border-radius: 8px;
    background: #ffffff;
}

.analytics-trend-legend,
.analytics-trend-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.analytics-trend-key {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #334766;
    font-weight: 800;
}

.analytics-trend-key::before {
    width: 18px;
    height: 4px;
    border-radius: 999px;
    background: #365a9b;
    content: "";
}

.analytics-trend-key--new::before {
    background: #2f7d5b;
}

.analytics-trend-chart {
    width: 100%;
    min-height: 220px;
}

.analytics-trend-gridline {
    stroke: #e6edf8;
    stroke-width: 1;
}

.analytics-trend-line {
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 5;
}

.analytics-trend-line--active {
    stroke: #365a9b;
}

.analytics-trend-line--new {
    stroke: #2f7d5b;
}

.analytics-trend-axis-label {
    fill: #49617f;
    font-size: 0.72rem;
    font-weight: 800;
    text-anchor: middle;
}

.analytics-trend-stat {
    min-width: 150px;
    padding: 12px;
    border: 1px solid #dbe4f1;
    border-left: 5px solid #49617f;
    border-radius: 8px;
    background: #f7faff;
}

.analytics-trend-stat--new {
    border-left-color: #2f7d5b;
}

.analytics-trend-stat--active {
    border-left-color: #365a9b;
}

.activity-layout {
    max-width: 1180px;
}

.admin-layout {
    max-width: 1180px;
}

.admin-summary-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.admin-activity-list .submission-item {
    grid-template-columns: minmax(180px, 1fr) minmax(220px, 1fr) minmax(180px, 0.8fr) auto;
}

.admin-health-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.admin-health-card {
    border-left: 5px solid #49617f;
}

.admin-health-card--success {
    border-left-color: #2f7d5b;
}

.admin-health-card--warning {
    border-left-color: #b77a20;
}

.admin-health-card--info {
    border-left-color: #365a9b;
}

.admin-search-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: end;
}

.admin-search-results .submission-item {
    grid-template-columns: minmax(180px, 1fr) auto minmax(260px, 1.2fr) auto auto auto;
}

.admin-result-action {
    min-height: 36px;
    padding: 0 12px;
}

.admin-result-action-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.moderation-action-button {
    white-space: nowrap;
}

.admin-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.admin-detail-card {
    display: grid;
    gap: 8px;
    padding: 16px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #ffffff;
}

.admin-detail-value {
    color: #1d3760;
    font-size: 0.98rem;
    overflow-wrap: anywhere;
}

.dashboard-summary--activity {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

.dashboard-summary--moderation {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

.activity-filter-form {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.moderation-filter-form {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.activity-table-shell {
    overflow-x: auto;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #ffffff;
}

.activity-table {
    width: 100%;
    min-width: 980px;
    border-collapse: collapse;
}

.activity-table th,
.activity-table td {
    padding: 14px;
    border-bottom: 1px solid #e6edf8;
    text-align: left;
    vertical-align: top;
}

.activity-table th {
    color: #49617f;
    font-size: 0.88rem;
}

.activity-table tbody tr:last-child td {
    border-bottom: 0;
}

.moderation-table {
    min-width: 1120px;
}

.moderation-table td:first-child {
    display: grid;
    gap: 4px;
}

.moderation-table td:last-child {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.activity-details-stack {
    display: grid;
    gap: 8px;
    min-width: 280px;
}

.activity-json-details {
    color: #334766;
}

.activity-json-details summary {
    cursor: pointer;
    font-weight: 800;
}

.activity-json-value {
    max-width: 420px;
    max-height: 220px;
    margin: 8px 0 0;
    overflow: auto;
    padding: 10px;
    border: 1px solid #e6edf8;
    border-radius: 8px;
    background: #f7faff;
    color: #334766;
    font-size: 0.78rem;
    line-height: 1.45;
    white-space: pre-wrap;
}

.analytics-progress-cell {
    display: grid;
    gap: 8px;
    min-width: 140px;
}

.analytics-question-cell {
    display: grid;
    gap: 6px;
    min-width: 260px;
}

.analytics-table-action {
    min-height: 36px;
    padding: 0 12px;
}

@media (max-width: 900px) {
    .lesson-view-shell,
    .split-learning-layout {
        grid-template-columns: 1fr;
    }

    .submission-summary-grid {
        grid-template-columns: 1fr;
    }

    .analytics-summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .admin-summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .admin-health-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .analytics-breakdown-grid {
        grid-template-columns: 1fr;
    }

    .dashboard-summary--activity {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .lesson-view-sidebar {
        position: static;
        max-height: none;
        overflow: visible;
        padding-left: 0;
    }

    .lesson-embed-shell iframe {
        min-height: 260px;
    }
}

.managed-classroom-list {
    display: grid;
    gap: 12px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.managed-classroom-card {
    display: grid;
    gap: 14px;
    padding: 18px;
    border: 1px solid #dbe4f1;
    border-radius: 16px;
    background: #f7faff;
    cursor: grab;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.managed-classroom-card:active {
    cursor: grabbing;
}

.managed-classroom-card--dragging {
    opacity: 0.45;
}

.managed-classroom-card--drop-target {
    border-color: #637fae;
    box-shadow: 0 0 0 2px rgba(57, 86, 135, 0.12);
}

.class-hub-card-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
    min-width: 0;
}

.class-hub-card-copy {
    display: grid;
    gap: 5px;
    min-width: 0;
}

.class-hub-card-copy .course-title,
.class-hub-card-copy .course-muted {
    margin: 0;
}

.class-hub-card-copy .course-muted {
    max-width: 68ch;
}

.class-hub-card-header .badge {
    flex: 0 0 auto;
}

.class-hub-metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.class-hub-metric {
    display: grid;
    gap: 2px;
    padding: 12px;
    border: 1px solid #dbe4f1;
    border-radius: 14px;
    background: #ffffff;
}

.class-hub-metric strong {
    color: #182b4d;
    font-size: 1.05rem;
    line-height: 1.2;
    overflow-wrap: anywhere;
}

.class-hub-metric span {
    color: #60728e;
    font-size: 0.82rem;
    font-weight: 800;
    text-transform: uppercase;
}

.class-hub-access {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.managed-classroom-actions {
    align-items: center;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.managed-classroom-actions--primary {
    display: grid;
    grid-template-columns: repeat(4, minmax(150px, 1fr));
    gap: 10px;
}

.managed-classroom-actions--primary .lesson-action {
    width: 100%;
    min-width: 0;
    box-shadow: none;
}

.managed-classroom-settings {
    display: grid;
    gap: 10px;
    padding-top: 4px;
}

.managed-classroom-settings summary {
    width: fit-content;
    color: #49617f;
    cursor: pointer;
    font-weight: 900;
}

.managed-classroom-settings summary:hover,
.managed-classroom-settings summary:focus-visible {
    color: #183153;
}

.managed-classroom-settings-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.managed-classroom-drag-hint {
    color: #49617f;
    font-size: 0.9rem;
    font-weight: 600;
}

.managed-classroom-join-code {
    margin: 0;
    padding: 12px;
    border-radius: 14px;
    background: #ffffff;
    color: #1d3760;
    font-weight: 800;
}

.managed-classroom-join-state {
    margin: 0;
    padding: 12px;
    border-radius: 14px;
    background: #ffffff;
    color: #237a4f;
    font-weight: 800;
}

.managed-classroom-join-state--closed {
    color: #9b3c2f;
}

.managed-classroom-invite-state {
    margin: 0;
    padding: 12px;
    border-radius: 14px;
    background: #ffffff;
    color: #49617f;
    font-weight: 700;
}

.roster-summary-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.roster-controls {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 240px));
    gap: 12px;
    align-items: end;
    padding: 16px;
    border: 1px solid #dbe4f1;
    border-radius: 16px;
    background: #f7faff;
}

@media (max-width: 1100px) {
    .app-frame > main {
        width: min(calc(100% - 32px), 1160px);
    }

    .code-workspace {
        grid-template-columns:
            minmax(220px, var(--code-instructions-width, 260px))
            8px
            minmax(140px, var(--code-files-width, 170px))
            8px
            minmax(0, 1.9fr);
    }

    .code-instructions-panel {
        grid-column: 1;
        grid-row: 1;
    }

    .code-resize-handle--instructions {
        grid-column: 2;
        grid-row: 1;
    }

    .code-file-panel {
        grid-column: 3;
        grid-row: 1;
    }

    .code-resize-handle--files {
        grid-column: 4;
        grid-row: 1;
    }

    .code-work-area {
        grid-column: 5;
        grid-row: 1;
        min-height: clamp(620px, 76vh, 840px);
    }

    .dashboard-home-grid {
        grid-template-columns: 1fr;
    }

    .dashboard-home-card--primary {
        grid-template-columns: minmax(0, 1fr);
    }

    .dashboard-home-actions {
        justify-content: flex-start;
    }

    .management-layout,
    .lesson-view-layout {
        max-width: 100%;
    }

    .student-course-header,
    .section-header--actions {
        align-items: stretch;
    }

    .student-course-header {
        flex-wrap: wrap;
    }

    .student-course-header > div,
    .section-header--actions > div {
        min-width: min(100%, 420px);
    }

    .submission-filter-form {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .managed-classroom-actions--primary {
        grid-template-columns: repeat(2, minmax(150px, 1fr));
    }

    .course-access-grid {
        grid-template-columns: 1fr;
    }

    .course-details-grid,
    .course-thumbnail-grid {
        grid-template-columns: 1fr;
    }

    .course-access-actions {
        justify-content: flex-start;
    }

    .teacher-course-card-header {
        grid-template-columns: 1fr;
    }

    .lesson-page-lesson-meta {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .lesson-page-lesson-meta article:last-child {
        grid-column: 1 / -1;
    }

    .lesson-submit-card--page {
        margin-right: calc(clamp(24px, 5vw, 52px) * -1);
        margin-left: calc(clamp(24px, 5vw, 52px) * -1);
        padding-right: clamp(24px, 5vw, 52px);
        padding-left: clamp(24px, 5vw, 52px);
    }
}

@media (max-width: 920px) and (min-width: 761px) {
    .lesson-authoring-topbar {
        grid-template-columns: minmax(0, 1fr);
    }

    .lesson-authoring-status,
    .lesson-authoring-actions {
        justify-self: start;
    }

    .lesson-authoring-actions {
        justify-content: flex-start;
    }

    .lesson-builder-workspace {
        grid-template-columns: 1fr;
    }

    .lesson-tool-grid {
        grid-template-columns: 1fr;
    }

    .lesson-builder-toolbox {
        position: static;
        max-height: none;
        border-left: 0;
        border-top: 1px solid #dbe4f1;
    }

    .lesson-tool-window {
        max-height: none;
    }
}

@media (max-width: 760px) {
    .class-hub-card-header {
        align-items: stretch;
        flex-direction: column;
    }

    .class-hub-metrics,
    .class-hub-access,
    .managed-classroom-actions--primary {
        grid-template-columns: 1fr;
    }

    .managed-classroom-actions .lesson-action,
    .managed-classroom-actions .primary-button,
    .managed-classroom-actions .secondary-button {
        width: 100%;
        min-width: 0;
    }
}

.roster-add-form {
    display: grid;
    grid-template-columns: minmax(0, 360px) auto;
    gap: 12px;
    align-items: end;
    padding: 16px;
    border: 1px solid #dbe4f1;
    border-radius: 16px;
    background: #ffffff;
}

.roster-list {
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.roster-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 0.65fr) auto auto;
    gap: 12px;
    align-items: center;
    padding: 16px;
    border: 1px solid #dbe4f1;
    border-radius: 16px;
    background: #ffffff;
}

.roster-identity {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.roster-identity-details {
    display: grid;
    gap: 4px;
    min-width: 0;
}

.roster-activity {
    display: grid;
    gap: 4px;
}

.roster-name {
    color: #1d3760;
}

.roster-actions {
    display: flex;
    justify-content: flex-end;
}

.section-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    justify-content: flex-end;
}

.section-actions .primary-button,
.section-actions .secondary-button {
    min-width: 170px;
}

@media (min-width: 900px) {
    .auth-card {
        padding: 34px;
    }

    .auth-layout--single {
        min-height: calc(100vh - 96px);
    }
}

@media (max-width: 720px) {
    body:not(.has-app-sidebar) {
        padding: 18px;
    }

    body.has-app-nav {
        padding: 0;
    }

    .ui-toast-container {
        top: 16px;
        right: 16px;
        left: 16px;
        width: auto;
    }

    .app-frame {
        gap: 14px;
        padding: 0 0 24px;
        width: 100%;
        max-width: 100vw;
    }

    .app-frame > main {
        width: calc(100% - 24px);
        max-width: 100%;
        min-width: 0;
        padding: 22px;
        border-radius: 18px;
        overflow-x: clip;
    }

    .app-topnav {
        position: sticky;
        top: 0;
        grid-template-columns: minmax(0, 1fr) auto;
        justify-items: stretch;
        gap: 10px;
        padding: 10px 14px;
        border-radius: 0;
    }

    .app-topnav-brand {
        justify-self: start;
        min-width: 0;
    }

    .app-topnav-toggle {
        display: inline-flex;
        position: relative;
        justify-self: end;
    }

    .app-topnav-menu {
        display: none;
        grid-column: 1 / -1;
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        gap: 10px;
        padding-top: 12px;
        border-top: 1px solid rgba(255, 255, 255, 0.16);
    }

    .app-topnav--open .app-topnav-menu {
        display: flex;
    }

    .app-topnav-links {
        display: grid;
        grid-template-columns: 1fr;
        justify-content: stretch;
        gap: 6px;
    }

    .app-topnav-link {
        justify-content: flex-start;
        width: 100%;
        min-width: 0;
        min-height: 44px;
        padding: 0 10px;
        border-radius: 12px;
    }

    .app-topnav-account {
        justify-self: stretch;
        width: 100%;
    }

    .app-topnav-account-summary {
        justify-content: space-between;
        max-width: none;
        width: 100%;
    }

    .app-topnav-account-menu {
        position: static;
        margin-top: 8px;
        border-color: rgba(255, 255, 255, 0.18);
        box-shadow: none;
    }

    .app-shell,
    .app-shell--collapsed {
        grid-template-columns: 1fr;
        gap: 14px;
        padding: 14px;
    }

    .app-shell > main {
        max-width: 100%;
        padding: 22px;
        border-radius: 18px;
        overflow-x: hidden;
    }

    .app-sidebar {
        position: static;
        max-height: none;
        min-height: 0;
        overflow: hidden;
        gap: 12px;
        padding: 14px;
        border-radius: 18px;
    }

    .app-sidebar-brand {
        align-items: center;
    }

    .app-sidebar-content {
        grid-template-columns: 1fr;
        gap: 0;
        max-height: min(54vh, 480px);
        overflow-y: auto;
        padding-right: 0;
    }

    .app-sidebar-section {
        gap: 8px;
        padding: 12px 0;
    }

    .app-sidebar-nav {
        grid-template-columns: 1fr;
    }

    .app-sidebar-link,
    .app-sidebar-toggle {
        min-height: 44px;
    }

    .app-sidebar-footer {
        justify-content: flex-start;
        padding-top: 10px;
    }

    .app-shell--collapsed .app-sidebar-content {
        display: none;
    }

    .auth-layout,
    .auth-layout--single {
        width: 100%;
        min-height: calc(100vh - 36px);
        padding: 0;
        border-radius: 20px;
    }

    .auth-card,
    .auth-card--single {
        padding: 22px;
    }

    .auth-card-header {
        gap: 8px;
        margin-bottom: 20px;
    }

    .auth-toggle {
        gap: 4px;
        padding: 5px;
        border-radius: 18px;
    }

    .auth-toggle-button {
        min-height: 42px;
        padding: 0 10px;
        border-radius: 14px;
        font-size: 0.95rem;
    }

    .social-button,
    .primary-button {
        min-height: 48px;
        border-radius: 14px;
    }

    .auth-divider span {
        font-size: 0.9rem;
    }

    .auth-status {
        font-size: 0.95rem;
        overflow-wrap: anywhere;
    }

    .auth-feedback-shell {
        align-items: end;
        padding: 12px;
    }

    .auth-feedback-panel {
        width: 100%;
        border-radius: 20px;
    }

    .app-shell--collapsed .app-sidebar-title-group {
        display: grid;
    }

    .app-shell--collapsed .app-sidebar-brand {
        justify-content: flex-start;
    }

    .dashboard-header,
    .management-header,
    .code-space-header {
        display: grid;
        gap: 16px;
    }

    .code-space-header-actions {
        display: grid;
        grid-template-columns: 1fr;
        justify-content: stretch;
        width: 100%;
    }

    .code-space-header-actions .primary-button,
    .code-space-header-actions .secondary-button {
        width: 100%;
        min-width: 0;
    }

    .code-workspace {
        grid-template-columns: 1fr;
        min-height: 0;
    }

    .code-resize-handle {
        display: none;
    }

    .code-instructions-panel,
    .code-file-panel {
        grid-column: auto;
        grid-row: auto;
        min-height: 170px;
        border-right: 0;
        border-bottom: 1px solid #405066;
    }

    .code-instructions-panel {
        min-height: 260px;
    }

    .code-file-list {
        grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr));
    }

    .code-work-area {
        grid-column: auto;
        grid-row: auto;
        grid-template-rows: minmax(460px, 1fr) minmax(240px, 0.44fr);
        min-height: 720px;
    }

    .dashboard-section--panel {
        padding: 16px;
        border-radius: 16px;
    }

    .dashboard-new-course-button {
        width: 100%;
    }

    .dashboard-header-actions {
        display: grid;
        grid-template-columns: 1fr;
        justify-content: stretch;
        width: 100%;
    }

    .dashboard-logout-button {
        width: 100%;
    }

    .dashboard-summary,
    .dashboard-home-grid,
    .dashboard-summary--activity,
    .course-form,
    .roster-controls,
    .roster-add-form,
    .roster-item,
    .roster-summary-grid,
    .submission-review-summary-grid,
    .submission-filter-form,
    .activity-filter-form,
    .moderation-filter-form {
        grid-template-columns: 1fr;
        width: 100%;
        min-width: 0;
    }

    .summary-card {
        padding: 14px;
        border-radius: 14px;
    }

    .summary-value {
        font-size: clamp(1.7rem, 10vw, 2.15rem);
    }

    .dashboard-home-card,
    .dashboard-home-card--primary {
        grid-template-columns: 1fr;
        padding: 16px;
        border-radius: 16px;
    }

    .dashboard-home-actions {
        display: grid;
        grid-template-columns: 1fr;
        justify-content: stretch;
        width: 100%;
    }

    .dashboard-home-actions .primary-button,
    .dashboard-home-actions .secondary-button,
    .course-actions .primary-button,
    .course-actions .secondary-button,
    .course-actions--teacher .primary-button,
    .course-actions--teacher .secondary-button,
    .teacher-course-actions .primary-button,
    .teacher-course-actions .secondary-button {
        width: 100%;
        min-width: 0;
        max-width: 100%;
    }

    .teacher-course-card {
        padding: 16px;
        border-radius: 16px;
    }

    .teacher-course-card-header,
    .teacher-course-actions,
    .teacher-course-classroom-item {
        grid-template-columns: 1fr;
    }

    .teacher-course-metrics {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .teacher-courses-layout .dashboard-summary--compact {
        grid-template-columns: 1fr;
    }

    .roster-item {
        justify-items: start;
    }

    .dashboard-join-panel {
        display: grid;
    }

    .section-actions {
        display: grid;
        grid-template-columns: 1fr;
        justify-content: stretch;
    }

    .section-actions .primary-button,
    .section-actions .secondary-button {
        width: 100%;
    }

    .dashboard-join-form {
        display: grid;
        min-width: 0;
    }

    .catalog-class-code-form {
        display: grid;
    }

    .catalog-class-code-form .form-field {
        min-width: 0;
    }

    .dashboard-join-panel .secondary-button {
        width: 100%;
    }

    .course-card-header {
        display: grid;
    }

    .course-card {
        padding: 16px;
        border-radius: 16px;
    }

    .course-grid {
        grid-template-columns: 1fr;
    }

    .course-grid-toggle {
        width: 100%;
    }

    .course-actions {
        display: grid;
        grid-template-columns: 1fr;
    }

    .course-access-actions,
    .course-danger-actions,
    .course-form-actions--setup {
        display: grid;
        grid-template-columns: 1fr;
    }

    .course-access-actions .primary-button,
    .course-access-actions .secondary-button,
    .course-danger-actions .secondary-button,
    .course-form-actions--setup .primary-button {
        width: 100%;
    }

    .course-actions--split,
    .course-actions-group {
        display: grid;
        grid-template-columns: 1fr;
        justify-content: stretch;
    }

    .course-actions-group--danger {
        justify-content: stretch;
    }

    .course-actions--split .primary-button,
    .course-actions--split .secondary-button {
        width: 100%;
        min-width: 0;
    }

    .badge-row {
        justify-content: flex-start;
    }

    .section-header--actions {
        display: grid;
    }

    .ui-page-header,
    .ui-section-header,
    .ui-card__header {
        display: grid;
    }

    .ui-page-header > .ui-action-row,
    .ui-section-header > .ui-action-row {
        width: 100%;
    }

    .student-course-header {
        display: grid;
    }

    .profile-hero-content,
    .profile-grid {
        grid-template-columns: 1fr;
    }

    .profile-hero-content {
        align-items: start;
    }

    .profile-hero-copy {
        padding-top: 0;
    }

    .profile-hero-title-row,
    .profile-mini-card__header {
        display: grid;
    }

    .profile-activity-item {
        grid-template-columns: 1fr;
        justify-items: start;
    }

    .submission-item {
        grid-template-columns: 1fr;
        justify-items: start;
    }

    .admin-activity-list .submission-item {
        grid-template-columns: 1fr;
    }

    .admin-search-form,
    .admin-search-results .submission-item {
        grid-template-columns: 1fr;
    }

    .admin-result-action {
        width: 100%;
    }

    .admin-detail-grid {
        grid-template-columns: 1fr;
    }

    .admin-health-grid {
        grid-template-columns: 1fr;
    }

    .management-action {
        width: 100%;
    }

    .lesson-builder-page {
        width: 100%;
        padding: 0;
        border-radius: 0;
    }

    .lesson-authoring-topbar {
        grid-template-columns: 1fr;
        align-items: start;
    }

    .lesson-authoring-status,
    .lesson-authoring-actions {
        justify-self: start;
    }

    .lesson-authoring-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .lesson-authoring-actions .secondary-button {
        flex: 1 1 150px;
    }

    .lesson-authoring-actions .badge {
        flex: 1 1 140px;
        justify-content: center;
    }

    .lesson-builder-authoring {
        border-radius: 0;
    }

    .lesson-builder-overview {
        grid-template-columns: 1fr;
    }

    .lesson-builder-overview-grid {
        grid-template-columns: 1fr;
    }

    .lesson-builder-overview-grid [data-lesson-details] {
        grid-column: 1 / -1;
    }

    .lesson-builder-workspace {
        grid-template-columns: 1fr;
    }

    .lesson-builder-main {
        padding: 14px;
        background: #edf3fb;
    }

    .lesson-question-editor-popover {
        left: 16px;
        right: 16px;
        top: 72px;
        width: auto;
        max-height: calc(100vh - 96px);
    }

    .lesson-page-toolbar,
    .lesson-page-section-header,
    .lesson-builder-editor-header {
        align-items: stretch;
        flex-direction: column;
    }

    .lesson-page-hero {
        padding: 28px 24px;
    }

    .lesson-builder-page .lesson-page-hero {
        grid-template-columns: 1fr;
        padding: 30px 24px;
    }

    .lesson-builder-page .lesson-page-hero .eyebrow,
    .lesson-builder-page .lesson-page-hero h2,
    .lesson-builder-page .lesson-page-lesson-meta {
        grid-column: 1;
        grid-row: auto;
    }

    .lesson-builder-page .lesson-page-lesson-meta {
        grid-template-columns: 1fr;
    }

    .lesson-builder-toolbox {
        position: static;
        max-height: none;
        border-left: 0;
        border-top: 1px solid #dbe4f1;
    }

    .lesson-page-hero h2 {
        font-size: 2.15rem;
    }

    .lesson-page-lesson-meta {
        grid-template-columns: 1fr;
    }

    .lesson-page-body {
        padding: 24px;
    }

    .lesson-page-canvas {
        margin-inline: -6px;
    }

    .lesson-submit-card--page {
        grid-template-columns: 1fr;
        margin: 24px -24px -24px;
        padding: 22px 24px 24px;
    }

    .lesson-submit-card--page h3,
    .lesson-submit-card--page [data-save-status],
    .lesson-submit-card--page [data-submit-status],
    .lesson-submit-card--page .lesson-draft-actions,
    .lesson-submit-card--page [data-turn-in-button],
    .lesson-submit-card--page [data-next-lesson-link] {
        grid-column: 1;
    }

    .lesson-inline-two-column,
    .lesson-inline-columns,
    .lesson-inline-gallery,
    .lesson-flashcard-editor-fields,
    .content-block-layout-preview,
    .lesson-layout-columns-preview,
    .lesson-render-media-text {
        grid-template-columns: 1fr;
    }

    .lesson-flashcard-editor-card {
        grid-template-columns: 28px minmax(0, 1fr) 42px;
    }

    .lesson-flashcard-editor-card .lesson-inline-media-slot {
        grid-column: 2 / 3;
    }

    .lesson-flashcard-viewport {
        grid-template-columns: 38px minmax(0, 1fr) 38px;
        gap: 8px;
    }

    .lesson-flashcard-arrow {
        width: 38px;
        height: 38px;
    }

    .lesson-layout-gallery-preview {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .lesson-builder-toolbox {
        position: static;
        max-height: none;
    }

    .lesson-tool-card {
        padding: 4px 0 0;
    }

    .lesson-tool-window {
        max-height: none;
    }

    .lesson-tool-list {
        grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    }

    .lesson-builder-overview-grid,
    .lesson-builder-overview-grid .course-classrooms {
        grid-template-columns: 1fr;
    }

    .lesson-builder-overview-grid .classroom-item:nth-child(3),
    .lesson-builder-overview-grid .classroom-item:nth-child(4) {
        grid-column: auto;
    }

    .lesson-tool-grid {
        grid-template-columns: 1fr;
    }

    .management-form-grid,
    .lesson-form-grid,
    .lesson-hub-filter-form {
        grid-template-columns: 1fr;
    }

    .lesson-form-grid .form-field:nth-child(2) {
        grid-row: auto;
    }

    .module-card-header,
    .lesson-card-header,
    .content-block-card,
    .question-card {
        grid-template-columns: 1fr;
    }

    .module-lessons-header,
    .module-actions,
    .lesson-reorder-controls,
    .lesson-header-actions,
    .lesson-content-header {
        align-items: stretch;
        flex-direction: column;
    }

    .management-layout .lesson-card-header {
        grid-template-columns: 1fr;
    }

    .lesson-hub-course-header,
    .lesson-hub-module-header,
    .lesson-hub-lesson-card {
        grid-template-columns: 1fr;
    }

    .lesson-hub-lesson-actions {
        width: 100%;
    }

    .lesson-hub-action {
        min-width: 0;
    }

    .management-layout .lesson-header-actions,
    .lesson-action-group,
    .lesson-reorder-controls {
        width: 100%;
    }

    .lesson-action-group {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .management-layout .lesson-header-actions {
        display: grid;
        grid-template-columns: 1fr;
        gap: 12px;
        justify-items: stretch;
    }

    .management-layout .lesson-drag-hint {
        justify-self: center;
        margin-top: 2px;
        text-align: center;
    }

    .management-layout .lesson-reorder-controls {
        display: grid;
        grid-template-columns: auto minmax(72px, 1fr) minmax(92px, auto);
        align-items: center;
        gap: 8px;
        padding: 8px;
    }

    .management-layout .lesson-reorder-controls .lesson-move-label {
        margin: 0;
    }

    .management-layout .lesson-position-select,
    .management-layout .lesson-move-button {
        min-height: 42px;
        width: 100%;
    }

    .management-layout .lesson-action {
        min-width: 0;
        width: 100%;
    }
}

@media (max-width: 480px) {
    body:not(.has-app-sidebar) {
        padding: 12px;
    }

    body.has-app-nav {
        padding: 0;
    }

    .app-frame {
        gap: 10px;
        padding: 0 0 18px;
        max-width: 100vw;
    }

    .app-frame > main {
        width: calc(100% - 16px);
        max-width: 100%;
        min-width: 0;
        padding: 18px 14px;
        border-radius: 16px;
    }

    .app-topnav {
        padding: 10px 12px;
        border-radius: 0;
    }

    .app-topnav-links {
        grid-template-columns: 1fr;
    }

    .app-topnav-link {
        justify-content: flex-start;
        min-height: 44px;
    }

    .app-topnav-title {
        font-size: 0.9rem;
    }

    .app-topnav-role,
    .app-topnav-account-name {
        font-size: 0.76rem;
    }

    .app-shell,
    .app-shell--collapsed {
        gap: 12px;
        padding: 10px;
    }

    .app-shell > main {
        padding: 18px 14px;
        border-radius: 16px;
    }

    .app-sidebar {
        padding: 12px;
        border-radius: 16px;
    }

    .app-sidebar-mark {
        width: 36px;
        height: 36px;
        flex-basis: 36px;
        border-radius: 11px;
    }

    .app-sidebar-link {
        padding: 0 10px;
        font-size: 0.9rem;
    }

    .dashboard-profile-heading {
        display: grid;
        gap: 12px;
    }

    .dashboard-section--panel,
    .course-card,
    .profile-hero,
    .profile-panel {
        border-radius: 14px;
    }

    .dashboard-section--panel,
    .course-card {
        padding: 14px;
    }

    .lesson-page-canvas {
        margin-inline: 0;
    }

    .lesson-page-hero,
    .lesson-page-body {
        padding-right: 18px;
        padding-left: 18px;
    }

    .lesson-submit-card--page {
        margin-right: -18px;
        margin-left: -18px;
        padding-right: 18px;
        padding-left: 18px;
    }

    .lesson-draft-actions {
        grid-template-columns: 1fr;
    }

    .profile-hero-content {
        gap: 12px;
        padding: 0 16px 18px;
        margin-top: -34px;
    }

    .profile-hero-title-row h1 {
        font-size: 1.8rem;
    }

    .profile-summary .summary-card {
        padding: 14px;
    }

    .section-actions,
    .course-form-actions,
    .dashboard-header-actions,
    .course-actions,
    .lesson-header-actions {
        display: grid;
        grid-template-columns: 1fr;
        width: 100%;
    }

    .primary-button,
    .secondary-button,
    .destructive-button,
    .social-button {
        width: 100%;
        min-width: 0;
    }

    .lesson-action-group {
        grid-template-columns: 1fr;
    }

    .management-layout .lesson-action-group {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .management-layout .lesson-action-group .lesson-action {
        min-height: 44px;
        padding-inline: 10px;
    }

    .management-layout .lesson-reorder-controls {
        grid-template-columns: auto minmax(64px, 1fr) minmax(82px, auto);
    }

    .lesson-code-space,
    .lesson-code-space-preview {
        grid-template-columns: 1fr;
    }

    .lesson-code-files,
    .lesson-code-space-preview-files {
        border-right: 0;
        border-bottom: 1px solid #2d394b;
    }

    .lesson-code-main {
        min-height: 460px;
    }

    .code-space-page {
        gap: 16px;
    }

    .code-panel-header,
    .code-editor-toolbar,
    .code-console-toolbar {
        align-items: start;
        display: grid;
    }

    .code-editor-meta {
        justify-content: start;
    }

    .code-editor-panel {
        min-height: 460px;
    }

    .code-line-numbers,
    .code-highlight,
    .code-editor {
        font-size: 0.86rem;
    }
}