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;
}

body.has-app-sidebar {
    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 {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(24, 49, 83, 0.08);
}

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

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

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

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

.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;
}

.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;
}

.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;
}

.auth-card {
    padding: 28px;
}

.auth-card--single {
    padding: clamp(28px, 4vw, 40px);
}

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

.auth-card-title {
    margin: 0;
    font-size: clamp(2rem, 4vw, 3.25rem);
    line-height: 0.98;
    letter-spacing: -0.04em;
}

.auth-card-copy {
    margin: 0;
    color: #49617f;
    max-width: 42ch;
}

.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: 46px;
    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: 54px;
    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%);
}

.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;
}

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

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

.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: 100%;
    min-height: 52px;
    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--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;
}

.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;
    max-width: 1120px;
}

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

.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;
}

.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(4, minmax(0, 1fr));
    gap: 14px;
}

.summary-card {
    display: grid;
    gap: 8px;
    padding: 18px;
    border: 1px solid #dbe4f1;
    border-radius: 18px;
    background: #f7faff;
}

.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 {
    margin-bottom: 4px;
}

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

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

.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;
    gap: 18px;
}

.course-card {
    display: grid;
    gap: 14px;
    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-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;
    padding-bottom: 10px;
    border-bottom: 1px solid #eef3fb;
}

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

.badge-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}

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

.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;
}

.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;
    gap: 10px;
}

.catalog-class-code-form .form-field {
    flex: 1;
}

.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;
    max-width: 960px;
}

.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-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 20px;
    align-items: start;
}

.lesson-builder-main {
    display: grid;
    gap: 18px;
    min-width: 0;
}

.lesson-page-canvas {
    display: grid;
    gap: 14px;
    padding: 0;
    border: 1px solid #d8dee8;
    border-radius: 4px;
    background: #eeeeee;
}

.lesson-page-toolbar,
.lesson-page-section-header {
    display: flex;
    gap: 14px;
    align-items: start;
    justify-content: space-between;
    padding: 12px 16px 0;
}

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

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

.lesson-page-toolbar-actions .secondary-button {
    min-height: 34px;
    padding: 8px 12px;
}

.lesson-page-sheet {
    display: grid;
    min-height: 640px;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(24, 49, 83, 0.16);
    overflow: hidden;
}

.lesson-page-hero {
    display: grid;
    gap: 16px;
    padding: 42px 52px 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: 2.65rem;
    font-weight: 500;
    line-height: 1.12;
}

.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: 32px 52px 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-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-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: sticky;
    top: 24px;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    gap: 0;
    max-height: calc(100vh - 48px);
    border: 1px solid #d8dee8;
    border-radius: 4px;
    background: #ffffff;
    box-shadow: 0 10px 28px rgba(24, 49, 83, 0.08);
    overflow: hidden;
}

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

.lesson-tool-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-bottom: 1px solid #e3e8f1;
}

.lesson-tool-tab {
    position: relative;
    min-height: 56px;
    padding: 10px 8px 12px;
    border: 0;
    background: #ffffff;
    color: #49617f;
    cursor: pointer;
    font: inherit;
    font-size: 0.84rem;
    font-weight: 800;
    line-height: 1.15;
    text-align: center;
}

.lesson-tool-tab:hover,
.lesson-tool-tab:focus-visible {
    background: #f5f8fc;
}

.lesson-tool-tab--active {
    color: #3569d9;
}

.lesson-tool-tab--active::after {
    position: absolute;
    right: 14px;
    bottom: 0;
    left: 14px;
    height: 3px;
    border-radius: 999px 999px 0 0;
    background: #3569d9;
    content: "";
}

.lesson-tool-window {
    min-height: 0;
    max-height: calc(100vh - 106px);
    overflow-y: auto;
    overscroll-behavior: contain;
}

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

.lesson-tool-grid--compact {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid #e3e8f1;
}

.lesson-insert-tile {
    display: grid;
    gap: 6px;
    place-items: center;
    min-height: 76px;
    padding: 10px;
    border: 0;
    border-radius: 4px;
    background: #ffffff;
    color: #183153;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.lesson-insert-tile:hover,
.lesson-insert-tile:focus-visible,
.lesson-insert-tile--active {
    background: #f1f5fb;
}

.lesson-insert-icon {
    display: inline-grid;
    place-items: center;
    width: 32px;
    height: 28px;
    color: #3569d9;
    font-size: 1.15rem;
    font-weight: 900;
}

.lesson-tool-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #667892;
    font-size: 0.82rem;
    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;
    gap: 2px;
}

.lesson-tool-button {
    display: grid;
    grid-template-columns: 34px 1fr;
    gap: 10px;
    align-items: center;
    min-height: 54px;
    padding: 10px;
    border: 0;
    border-radius: 4px;
    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 {
    background: #f1f5fb;
}

.lesson-tool-button--active {
    border-color: #3569d9;
    background: #eaf2ff;
    box-shadow: inset 3px 0 0 #3569d9;
}

.lesson-tool-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 4px;
    background: transparent;
    color: #667892;
    font-size: 0.78rem;
    font-weight: 900;
}

.lesson-tool-button--simple {
    grid-template-columns: 34px 1fr;
    min-height: 46px;
    color: #4b5f79;
    font-weight: 800;
}

.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 {
    font-size: 0.9rem;
    line-height: 1.2;
}

.lesson-tool-button small {
    color: #49617f;
    font-size: 0.78rem;
    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;
}

.lesson-action {
    width: auto;
    padding: 9px 14px;
}

.lesson-reorder-controls {
    align-items: center;
    display: flex;
    gap: 8px;
}

.lesson-move-label {
    font-weight: 700;
    margin: 0;
    white-space: nowrap;
}

.lesson-position-select {
    min-height: 42px;
    min-width: 68px;
    border: 1px solid #d7e2f1;
    border-radius: 10px;
    background: #ffffff;
    color: #1f3556;
    font: inherit;
    font-weight: 700;
    padding: 0 10px;
}

.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;
}

.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;
}

.lesson-header-actions {
    align-items: center;
    display: flex;
    gap: 8px;
}

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

.lesson-title {
    margin: 0 0 5px;
    font-size: 1rem;
}

.lesson-meta-row {
    justify-content: flex-start;
    margin-top: 10px;
}

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

.lesson-page-sheet .content-block-card,
.lesson-page-sheet .question-card {
    border-color: #e0e5ee;
    border-radius: 0;
    background: #ffffff;
    box-shadow: none;
}

.lesson-page-sheet .content-block-card {
    border-left: 3px solid #4d7df2;
}

.lesson-page-sheet .question-card {
    border-left: 3px solid #4f9566;
}

.lesson-page-sheet .content-block-actions {
    margin-top: 6px;
    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-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: 1080px;
    padding-inline: 28px;
}

.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;
}

.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: 14px;
}

.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-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 {
    border-left: 5px solid #49617f;
}

.lesson-render-block--youtube {
    border-left: 5px solid #d24b4b;
}

.lesson-render-block--slides {
    border-left: 5px solid #b07a32;
}

.lesson-render-block--link {
    border-left: 5px solid #3b7f70;
}

.lesson-render-block--file {
    border-left: 5px solid #6750a4;
}

.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: 480px;
    border-radius: 12px;
    object-fit: contain;
    background: #f7faff;
}

.lesson-render-block audio {
    width: 100%;
}

.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 .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;
    grid-template-columns: 1fr auto;
    gap: 6px 16px;
    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);
}

.managed-classroom-card .course-muted {
    grid-column: 1;
}

.managed-classroom-card .badge {
    grid-column: 2;
    grid-row: 1 / span 2;
}

.managed-classroom-actions {
    align-items: center;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    grid-column: 1 / -1;
    margin-top: 8px;
}

.managed-classroom-drag-hint {
    color: #49617f;
    font-size: 0.9rem;
    font-weight: 600;
}

.managed-classroom-join-code {
    grid-column: 1 / -1;
    margin: 0;
    color: #1d3760;
    font-weight: 800;
}

.managed-classroom-join-state {
    grid-column: 1 / -1;
    margin: 0;
    color: #237a4f;
    font-weight: 800;
}

.managed-classroom-join-state--closed {
    color: #9b3c2f;
}

.managed-classroom-invite-state {
    grid-column: 1 / -1;
    margin: 0;
    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;
}

.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;
    justify-content: flex-end;
}

@media (min-width: 900px) {
    .auth-card {
        padding: 34px;
    }

    .auth-layout--single {
        min-height: calc(100vh - 96px);
    }
}

@media (max-width: 720px) {
    .ui-toast-container {
        top: 16px;
        right: 16px;
        left: 16px;
        width: auto;
    }

    .app-shell,
    .app-shell--collapsed {
        grid-template-columns: 1fr;
        gap: 18px;
        padding: 18px;
    }

    .app-sidebar {
        position: static;
        max-height: none;
        min-height: 0;
        overflow: visible;
        gap: 14px;
        padding: 14px;
    }

    .app-sidebar-content {
        grid-template-columns: 1fr;
        gap: 12px;
        overflow: visible;
        padding-right: 0;
    }

    .app-sidebar-nav {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }

    .app-shell--collapsed .app-sidebar-content {
        display: none;
    }

    .app-shell--collapsed .app-sidebar-title-group {
        display: grid;
    }

    .app-shell--collapsed .app-sidebar-brand {
        justify-content: flex-start;
    }

    .dashboard-header {
        display: grid;
    }

    .dashboard-section--panel {
        padding: 16px;
        border-radius: 16px;
    }

    .dashboard-new-course-button {
        width: 100%;
    }

    .dashboard-header-actions {
        display: grid;
        justify-content: stretch;
    }

    .dashboard-logout-button {
        width: 100%;
    }

    .dashboard-summary,
    .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;
    }

    .roster-item {
        justify-items: start;
    }

    .dashboard-join-panel {
        display: grid;
    }

    .section-actions {
        justify-content: stretch;
    }

    .section-actions .secondary-button {
        width: 100%;
    }

    .dashboard-join-form {
        display: grid;
        min-width: 0;
    }

    .catalog-class-code-form {
        display: grid;
    }

    .dashboard-join-panel .secondary-button {
        width: 100%;
    }

    .course-card-header {
        display: grid;
    }

    .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-workspace {
        grid-template-columns: 1fr;
    }

    .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-page-hero h2 {
        font-size: 2.15rem;
    }

    .lesson-page-lesson-meta {
        grid-template-columns: 1fr;
    }

    .lesson-page-body {
        padding: 24px;
    }

    .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 {
        grid-template-columns: 1fr;
    }

    .lesson-builder-toolbox {
        position: static;
        order: -1;
        max-height: none;
    }

    .lesson-tool-card {
        padding: 14px;
    }

    .lesson-tool-window {
        max-height: 360px;
    }

    .lesson-tool-list {
        grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    }

    .management-form-grid,
    .lesson-form-grid {
        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;
    }
}