/* classroom beta polish — final UX layer for responsivity, color, and release readiness. */

/* ── Foundations ─────────────────────────────────────────────────────────── */

:root {
    --beta-blue: #2563eb;
    --beta-blue-soft: #e8f1ff;
    --beta-green: #10b981;
    --beta-green-soft: #e7fbf2;
    --beta-amber: #f59e0b;
    --beta-amber-soft: #fff7e7;
    --beta-red-soft: #ffeceb;
    --beta-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05), 0 10px 24px rgba(15, 23, 42, 0.06);
    --beta-shadow-md: 0 8px 18px rgba(15, 23, 42, 0.08), 0 22px 48px rgba(15, 23, 42, 0.1);
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
}

html[data-theme="dark"] {
    --beta-blue-soft: rgba(90, 169, 255, 0.16);
    --beta-green-soft: rgba(112, 239, 189, 0.12);
    --beta-amber-soft: rgba(255, 216, 102, 0.12);
    --beta-red-soft: rgba(255, 152, 122, 0.12);
    --beta-shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.22);
    --beta-shadow-md: 0 12px 36px rgba(0, 0, 0, 0.32);
}

html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
    background: var(--page-bg, #f6f8fc);
}

::selection {
    background: color-mix(in srgb, var(--blue) 24%, transparent);
    color: var(--text);
}

* {
    scrollbar-width: thin;
    scrollbar-color: color-mix(in srgb, var(--blue) 38%, var(--border)) transparent;
}

*::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

*::-webkit-scrollbar-thumb {
    border: 2px solid transparent;
    border-radius: 999px;
    background: color-mix(in srgb, var(--blue) 38%, var(--border));
    background-clip: padding-box;
}

*::-webkit-scrollbar-track {
    background: transparent;
}

/* ── Skip link & beta badge ──────────────────────────────────────────────── */

.skip-link {
    position: fixed;
    top: calc(0.5rem + var(--safe-top));
    left: calc(0.75rem + var(--safe-left));
    z-index: 100;
    transform: translateY(-160%);
    border: 1px solid var(--blue);
    border-radius: 999px;
    background: var(--surface);
    color: var(--blue-dark);
    padding: 0.55rem 0.9rem;
    font-size: 0.82rem;
    font-weight: 800;
    text-decoration: none;
    box-shadow: var(--beta-shadow-sm);
    transition: transform 160ms ease;
}

.skip-link:focus {
    transform: translateY(0);
    outline: none;
}

.classroom-logo {
    position: relative;
    padding-right: 2.55rem;
}

.classroom-logo::before {
    content: "Beta";
    position: absolute;
    top: -0.08rem;
    right: 0;
    display: inline-flex;
    align-items: center;
    min-height: 1.15rem;
    border: 1px solid color-mix(in srgb, var(--blue) 42%, var(--border));
    border-radius: 999px;
    background: var(--beta-blue-soft);
    color: var(--blue-dark);
    padding: 0.08rem 0.42rem;
    font-family: var(--font-sans);
    font-size: 0.58rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    line-height: 1;
    text-transform: uppercase;
}

html[data-theme="dark"] .classroom-logo::before {
    color: var(--blue);
}

/* ── Shell & surfaces ────────────────────────────────────────────────────── */

.ui-shell {
    padding-bottom: var(--safe-bottom);
}

.workspace-header,
.site-nav {
    padding-top: calc(0.28rem + var(--safe-top));
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.surface-panel,
.portal-hero-card,
.side-panel,
.empty-state,
.active-course-card,
.portal-course-card,
.catalog-hero-panel,
.catalog-card,
.catalog-empty,
.creator-main-panel,
.creator-side-panel > section,
.studio-rail-card,
.auth-dialog,
.loader-panel {
    box-shadow: var(--beta-shadow-sm) !important;
    transition:
        border-color 160ms ease,
        box-shadow 160ms ease,
        transform 160ms ease,
        background-color 160ms ease;
}

@media (hover: hover) and (pointer: fine) {
    .portal-course-card:hover,
    .catalog-card:hover,
    .studio-rail-card:hover:not(.is-active),
    .account-document-tile:hover,
    .scene-chip:hover,
    .sample-course-card:hover {
        border-color: color-mix(in srgb, var(--blue) 42%, var(--border)) !important;
        box-shadow: var(--beta-shadow-md) !important;
        transform: translateY(-1px);
    }

    .btn-primary:hover,
    .resume-course-btn:hover,
    .catalog-enroll-btn:not(.secondary):hover {
        transform: translateY(-1px);
    }
}

/* ── Buttons & inputs ────────────────────────────────────────────────────── */

.btn-primary:active,
.btn-secondary:active,
.icon-button:active,
.resume-course-btn:active {
    transform: translateY(0);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--blue) 72%, transparent);
    outline-offset: 2px;
}

@media (max-width: 760px) {
    .btn-primary,
    .btn-secondary,
    .icon-button,
    .resume-course-btn,
    .catalog-enroll-btn,
    .nav-link {
        min-height: 2.75rem;
    }

    .ui-shell {
        padding-inline: 0.6rem;
    }
}

/* ── Mobile header ───────────────────────────────────────────────────────── */

@media (max-width: 720px) {
    .workspace-header {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: center;
        gap: 0.45rem;
        row-gap: 0;
    }

    .workspace-header .workspace-brand-cluster,
    .workspace-header .dashboard-header-title,
    .workspace-header > h1 {
        grid-column: 1;
        min-width: 0;
    }

    .workspace-header .header-actions {
        grid-column: 2;
        grid-row: 1;
        flex-wrap: nowrap;
        max-width: min(100%, 14rem);
        overflow-x: auto;
        overscroll-behavior-x: contain;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        mask-image: linear-gradient(90deg, transparent 0, #000 0.75rem, #000 calc(100% - 0.75rem), transparent 100%);
    }

    .workspace-header .header-actions::-webkit-scrollbar {
        display: none;
    }

    .workspace-header .workspace-back-btn,
    .workspace-header > .btn-secondary:first-child {
        grid-column: 1;
        grid-row: 1;
        justify-self: start;
    }

    .workspace-header:has(.workspace-back-btn) .dashboard-header-title,
    .workspace-header:has(.workspace-back-btn) > h1 {
        grid-column: 1 / -1;
        grid-row: 2;
    }

    .workspace-header:has(.workspace-back-btn) .header-actions {
        grid-column: 2;
        grid-row: 1;
    }

    .workspace-header > h1 {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-size: 0.92rem;
    }
}

/* ── Toasts ──────────────────────────────────────────────────────────────── */

#toast-container {
    top: calc(0.85rem + var(--safe-top)) !important;
    right: calc(0.85rem + var(--safe-right)) !important;
    z-index: 70;
}

/* Dark-mode stronger primary button override to avoid washed-out cyan */
html[data-theme="dark"] :is(.btn-primary, .catalog-enroll-btn:not(.secondary), .resume-course-btn, .course-action-btn.primary) {
    background: #2d7ee8 !important;
    border-color: #1f74e8 !important;
    color: #ffffff !important;
    box-shadow: 0 8px 18px rgba(13, 40, 83, 0.36) !important;
}

html[data-theme="dark"] :is(.btn-primary:hover, .catalog-enroll-btn:not(.secondary):hover) {
    background: #1f6be0 !important;
}

.toast {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    color: var(--text);
    padding: 0.72rem 0.82rem;
    font-size: 0.84rem;
    line-height: 1.42;
    box-shadow: var(--beta-shadow-md);
    animation: toast-in 220ms ease;
}

.toast-success {
    border-color: color-mix(in srgb, var(--green) 42%, var(--border));
    background: color-mix(in srgb, var(--green-soft) 72%, var(--surface));
}

.toast-error {
    border-color: color-mix(in srgb, var(--red) 42%, var(--border));
    background: color-mix(in srgb, var(--red-soft) 72%, var(--surface));
}

.toast-info {
    border-color: color-mix(in srgb, var(--blue) 42%, var(--border));
    background: color-mix(in srgb, var(--beta-blue-soft) 72%, var(--surface));
}

.toast-message {
    flex: 1;
    min-width: 0;
}

.toast-close {
    display: inline-grid;
    width: 1.65rem;
    height: 1.65rem;
    flex: 0 0 auto;
    place-items: center;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
}

.toast-close:hover {
    background: var(--surface-2);
    color: var(--text);
}

.toast.is-leaving {
    animation: toast-out 180ms ease forwards;
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateY(-0.35rem) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes toast-out {
    to {
        opacity: 0;
        transform: translateY(-0.25rem) scale(0.98);
    }
}

@media (max-width: 640px) {
    #toast-container {
        top: auto !important;
        right: calc(0.65rem + var(--safe-right)) !important;
        bottom: calc(0.75rem + var(--safe-bottom)) !important;
        left: calc(0.65rem + var(--safe-left)) !important;
        width: auto !important;
    }
}

/* ── Global loader & auth modal ──────────────────────────────────────────── */

#global-loader {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: color-mix(in srgb, var(--page-bg) 88%, transparent) !important;
}

.loader-panel {
    box-shadow: var(--beta-shadow-md) !important;
    animation: loader-pop 240ms ease;
}

.loader-dot {
    width: 2.2rem;
    height: 2.2rem;
    border-width: 2.5px;
}

@keyframes loader-pop {
    from {
        opacity: 0;
        transform: scale(0.96);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

#auth-modal {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.auth-dialog {
    box-shadow: var(--beta-shadow-md) !important;
    animation: loader-pop 220ms ease;
}

.auth-mode-tab:focus-visible,
.auth-mode-active {
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--blue) 28%, transparent);
}

/* ── Offline banner ──────────────────────────────────────────────────────── */

body.offline::after {
    content: "You are offline. Cached lessons remain available.";
    position: fixed;
    left: 50%;
    bottom: calc(0.75rem + var(--safe-bottom));
    z-index: 65;
    transform: translateX(-50%);
    width: min(28rem, calc(100vw - 1.5rem));
    border: 1px solid color-mix(in srgb, var(--amber) 42%, var(--border));
    border-radius: 999px;
    background: color-mix(in srgb, var(--amber-soft) 88%, var(--surface));
    color: var(--text);
    padding: 0.55rem 0.95rem;
    font-size: 0.78rem;
    font-weight: 750;
    text-align: center;
    box-shadow: var(--beta-shadow-sm);
    pointer-events: none;
}

@media (max-width: 640px) {
    body.offline::after {
        bottom: calc(4.5rem + var(--safe-bottom));
    }
}

/* ── Landing & footer ────────────────────────────────────────────────────── */

.landing-footer {
    position: relative;
    z-index: 2;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    width: min(1180px, calc(100% - 2rem));
    margin: 0 auto;
    border-top: 1px solid var(--hero-line, var(--border));
    color: var(--hero-muted, var(--muted));
    padding: 1.25rem 0 1.75rem;
    font-size: 0.82rem;
    line-height: 1.45;
}

.landing-footer strong {
    color: var(--hero-ink, var(--text));
    font-weight: 820;
}

.landing-footer-links {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.landing-footer-links a,
.landing-footer-links button {
    min-height: auto;
    border: 0;
    background: transparent;
    color: var(--hero-blue, var(--blue));
    padding: 0;
    font-size: 0.82rem;
    font-weight: 760;
    text-decoration: none;
}

.landing-footer-links a:hover,
.landing-footer-links button:hover {
    text-decoration: underline;
}

.beta-release-note {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    border: 1px solid color-mix(in srgb, var(--blue) 32%, var(--border));
    border-radius: 999px;
    background: color-mix(in srgb, var(--beta-blue-soft) 80%, var(--surface));
    color: var(--blue-dark);
    padding: 0.22rem 0.55rem;
    font-size: 0.68rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

/* ── Empty states & cards ──────────────────────────────────────────────────── */

.empty-state,
.catalog-empty,
.materials-empty-state,
.materials-empty-preview {
    background:
        radial-gradient(circle at top right, color-mix(in srgb, var(--blue-soft) 72%, transparent), transparent 42%),
        var(--surface-2) !important;
}

.empty-state h3,
.catalog-empty h3,
.materials-empty-preview strong {
    font-family: var(--font-display);
}

.section-title-row span,
#course-count-badge {
    border-color: color-mix(in srgb, var(--blue) 24%, var(--border));
    background: color-mix(in srgb, var(--beta-blue-soft) 64%, var(--surface-2));
    color: var(--blue-dark);
}

html[data-theme="dark"] .section-title-row span,
html[data-theme="dark"] #course-count-badge {
    color: var(--blue);
}

/* ── Course creator & catalog mobile ─────────────────────────────────────── */

@media (max-width: 900px) {
    #view-course-creator main.creator-page {
        width: min(100%, calc(100vw - 0.55rem));
        padding-top: 0.35rem;
    }

    .studio-rail {
        position: static;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 0.42rem;
    }

    .studio-rail-card {
        min-height: 5.5rem;
        padding: 0.55rem;
    }

    .studio-rail-card p {
        display: none;
    }
}

@media (max-width: 560px) {
    .studio-rail {
        grid-template-columns: 1fr;
    }

    .studio-rail-card {
        grid-template-columns: auto 1fr;
        grid-template-rows: auto auto;
        align-items: center;
        min-height: auto;
    }

    .studio-rail-card span {
        grid-row: span 2;
    }

    .studio-rail-card p {
        display: block;
    }

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

    .creator-intel-strip {
        grid-template-columns: 1fr;
    }
}

/* ── Learning cockpit mobile tweaks ──────────────────────────────────────── */

@media (max-width: 760px) {
    .ai-pane-shell {
        right: calc(0.45rem + var(--safe-right));
        bottom: calc(0.45rem + var(--safe-bottom));
        width: min(100%, calc(100vw - 0.9rem));
    }

    .ai-pane {
        min-height: min(70vh, 28rem);
    }
}

/* ── Reduced motion ──────────────────────────────────────────────────────── */

html.reduce-motion *,
html.reduce-motion *::before,
html.reduce-motion *::after {
    scroll-behavior: auto !important;
}

@media (prefers-reduced-motion: reduce) {
    .toast,
    .loader-panel,
    .auth-dialog,
    .portal-course-card,
    .catalog-card,
    .catalog-card-loading,
    .portal-course-card.is-generating .portal-course-progress span {
        animation: none !important;
        transition-duration: 0.001ms !important;
    }
}

/* ── Toast authority (overrides product-shell resets) ─────────────────────── */

#toast-container .toast {
    border: 1px solid var(--border) !important;
    border-radius: 12px !important;
    background: var(--surface) !important;
    color: var(--text) !important;
    box-shadow: var(--beta-shadow-md) !important;
}

#toast-container .toast-success {
    border-color: color-mix(in srgb, var(--green) 42%, var(--border)) !important;
    background: color-mix(in srgb, var(--green-soft) 72%, var(--surface)) !important;
}

#toast-container .toast-error {
    border-color: color-mix(in srgb, var(--red) 42%, var(--border)) !important;
    background: color-mix(in srgb, var(--red-soft) 72%, var(--surface)) !important;
}

#toast-container .toast-info {
    border-color: color-mix(in srgb, var(--blue) 42%, var(--border)) !important;
    background: color-mix(in srgb, var(--beta-blue-soft) 72%, var(--surface)) !important;
}

/* ── Auth feedback ───────────────────────────────────────────────────────── */

.auth-message {
    margin-bottom: 0.55rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.62rem;
    font-size: 0.84rem;
    line-height: 1.38;
}

.auth-message-error {
    border-color: color-mix(in srgb, var(--red) 42%, var(--border));
    background: color-mix(in srgb, var(--red-soft) 78%, var(--surface));
    color: var(--red);
}

.auth-message-success {
    border-color: color-mix(in srgb, var(--green) 42%, var(--border));
    background: color-mix(in srgb, var(--green-soft) 78%, var(--surface));
    color: var(--green);
}

.auth-message-info {
    border-color: color-mix(in srgb, var(--blue) 42%, var(--border));
    background: color-mix(in srgb, var(--beta-blue-soft) 78%, var(--surface));
    color: var(--blue-dark);
}

html[data-theme="dark"] .auth-message-info {
    color: var(--blue);
}

/* ── Loader progress ─────────────────────────────────────────────────────── */

.loader-progress {
    width: min(100%, 14rem);
    height: 0.38rem;
    margin-top: 0.55rem;
    overflow: hidden;
    border-radius: 999px;
    background: color-mix(in srgb, var(--blue-soft) 64%, var(--surface-2));
}

.loader-progress > div {
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--blue), color-mix(in srgb, var(--green) 42%, var(--blue)));
    transition: width 280ms ease;
}

#loader-subtext:not(.hidden) {
    margin-top: 0.42rem;
    color: var(--muted);
    font-size: 0.78rem;
    line-height: 1.35;
    text-align: center;
}

/* ── Loading & generating states ─────────────────────────────────────────── */

.catalog-card-loading {
    position: relative;
    overflow: hidden;
    border-color: color-mix(in srgb, var(--blue) 18%, var(--border)) !important;
    background:
        linear-gradient(90deg, var(--surface-2) 0%, color-mix(in srgb, var(--blue-soft) 72%, var(--surface-2)) 50%, var(--surface-2) 100%) !important;
    background-size: 220% 100% !important;
    animation: beta-shimmer 1.35s ease-in-out infinite;
    min-height: 12rem;
}

.portal-course-card.is-generating {
    border-color: color-mix(in srgb, var(--amber) 38%, var(--border)) !important;
}

.portal-course-card.is-generating .portal-course-progress span {
    background: linear-gradient(90deg, var(--amber), color-mix(in srgb, var(--blue) 42%, var(--amber)));
    animation: beta-progress-pulse 1.6s ease-in-out infinite;
}

.portal-course-card.is-failed {
    border-color: color-mix(in srgb, var(--red) 34%, var(--border)) !important;
}

@keyframes beta-shimmer {
    0% { background-position: 120% 0; }
    100% { background-position: -120% 0; }
}

@keyframes beta-progress-pulse {
    0%, 100% { opacity: 0.72; }
    50% { opacity: 1; }
}

/* ── Landing safe areas ────────────────────────────────────────────────────── */

.landing-nav {
    top: calc(0.75rem + var(--safe-top));
}

.scroll-orbit {
    bottom: calc(clamp(0.65rem, 2vw, 1.4rem) + var(--safe-bottom));
    right: calc(clamp(0.65rem, 2vw, 1.4rem) + var(--safe-right));
}

@media (max-width: 760px) {
    .landing-nav {
        top: calc(0.45rem + var(--safe-top));
    }

    .scroll-orbit {
        bottom: calc(0.55rem + var(--safe-bottom));
        right: calc(0.55rem + var(--safe-right));
    }
}

/* ── Portal & account mobile ───────────────────────────────────────────────── */

@media (max-width: 900px) {
    #view-portal .portal-sidebar {
        grid-template-columns: 1fr;
    }

    #view-portal .portal-main {
        padding-bottom: calc(0.75rem + var(--safe-bottom));
    }
}

@media (max-width: 760px) {
    #view-account .account-nav {
        display: flex;
        gap: 0.38rem;
        overflow-x: auto;
        overscroll-behavior-x: contain;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: 0.12rem;
        mask-image: linear-gradient(90deg, transparent 0, #000 0.5rem, #000 calc(100% - 0.5rem), transparent 100%);
    }

    #view-account .account-nav::-webkit-scrollbar {
        display: none;
    }

    #view-account .account-nav-item {
        flex: 0 0 auto;
        white-space: nowrap;
    }

    .portal-hero-actions,
    .empty-actions {
        grid-template-columns: 1fr;
        width: 100%;
    }

    .portal-hero-actions .btn-primary,
    .portal-hero-actions .btn-secondary,
    .empty-actions .btn-primary,
    .empty-actions .btn-secondary {
        width: 100%;
    }
}

/* ── Workspace beta strip ──────────────────────────────────────────────────── */

.workspace-beta-strip {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    width: min(1180px, calc(100% - 1rem));
    margin: 0 auto;
    color: var(--muted);
    padding: 0.55rem 0 0.85rem;
    font-size: 0.74rem;
    line-height: 1.4;
    text-align: center;
}

.workspace-beta-strip strong {
    color: var(--text);
    font-weight: 820;
}

@media print {
    /* Set page margins and page size */
    @page {
        size: A4 portrait;
        margin: 12mm 10mm 12mm 10mm;
    }

    /* Force light mode variables, ignoring data-theme="dark" */
    :root,
    html,
    html[data-theme="dark"],
    body {
        --page-bg: #f2f6fb !important;
        --surface: #ffffff !important;
        --surface-2: #edf3fa !important;
        --surface-3: #dfeaf5 !important;
        --text: #152033 !important;
        --muted: #5a6d85 !important;
        --muted-2: #7d8fa3 !important;
        --border: #cfdcec !important;
        --border-strong: #a8bdd3 !important;
        --blue: #1a6dff !important;
        --blue-dark: #1252c4 !important;
        --blue-soft: #e8f1ff !important;
        
        --fc-bg: #f2f6fb !important;
        --fc-surface: #ffffff !important;
        --fc-surface-2: #edf3fa !important;
        --fc-surface-3: #dfeaf5 !important;
        --fc-ink: #152033 !important;
        --fc-muted: #5a6d85 !important;
        --fc-muted-2: #7d8fa3 !important;
        --fc-line: #cfdcec !important;
        --fc-line-strong: #a8bdd3 !important;
        --fc-blue: #1a6dff !important;
        --fc-blue-strong: #1252c4 !important;
        --fc-blue-soft: #e8f1ff !important;

        --ui-canvas: #f2f6fb !important;
        --ui-surface: #ffffff !important;
        --ui-surface-2: #edf3fa !important;
        --ui-text: #152033 !important;
        --ui-muted: #5a6d85 !important;
        --ui-border: #cfdcec !important;
        --ui-blue: #1a6dff !important;
        --ui-ink: #152033 !important;

        background: #f2f6fb !important;
        color: #152033 !important;
        color-scheme: light !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }

    /* Keep the website's exact rich typography and layouts for print container */
    body.print-lesson-mode {
        background: #f2f6fb !important;
    }

    body.print-lesson-mode #app-container,
    body.print-lesson-mode #view-dashboard,
    body.print-lesson-mode main.dashboard-shell,
    body.print-lesson-mode #dashboard-content,
    body.print-lesson-mode .course-workspace,
    body.print-lesson-mode .course-layout,
    body.print-lesson-mode .course-main {
        background: transparent !important;
        border: 0 !important;
        box-shadow: none !important;
        padding: 0 !important;
        margin: 0 !important;
    }

    /* Note PDF Container Card - Styled exactly like the website page card */
    body.print-lesson-mode #active-lesson-panel {
        background: #ffffff !important;
        border: 1px solid #cfdcec !important;
        border-radius: 12px !important;
        padding: 24pt !important;
        margin: 0 auto !important;
        max-width: 100% !important;
        box-shadow: 0 4px 16px rgba(21, 32, 51, 0.05) !important;
        display: block !important;
        page-break-before: avoid !important;
    }

    /* Print Document Cover & Header rules */
    body.print-lesson-mode #active-lesson-panel .print-document-cover {
        display: block !important;
        margin-bottom: 24pt !important;
        padding-bottom: 16pt !important;
        border-bottom: 2px solid #cfdcec !important;
        background: transparent !important;
    }

    body.print-lesson-mode #active-lesson-panel .print-brand-row {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        margin-bottom: 12pt !important;
    }

    body.print-lesson-mode #active-lesson-panel .print-brand-row strong {
        color: #1a6dff !important;
        font-family: var(--font-display, Outfit), sans-serif !important;
        font-size: 16pt !important;
        font-weight: 800 !important;
    }

    body.print-lesson-mode #active-lesson-panel .print-brand-row span {
        color: #5a6d85 !important;
        font-size: 9pt !important;
        text-transform: uppercase !important;
        font-weight: 600 !important;
        letter-spacing: 0.05em !important;
    }

    body.print-lesson-mode #active-lesson-panel .print-document-cover h1 {
        font-size: 22pt !important;
        color: #152033 !important;
        margin: 0 0 12pt 0 !important;
        font-weight: 800 !important;
        line-height: 1.2 !important;
    }

    body.print-lesson-mode #active-lesson-panel .print-meta-grid {
        display: grid !important;
        grid-template-columns: repeat(4, 1fr) !important;
        gap: 8pt !important;
        margin-bottom: 12pt !important;
    }

    body.print-lesson-mode #active-lesson-panel .print-meta-grid span {
        background: #edf3fa !important;
        color: #152033 !important;
        border: 1px solid #cfdcec !important;
        border-radius: 6px !important;
        padding: 6pt !important;
        font-size: 8.5pt !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 2pt !important;
    }

    body.print-lesson-mode #active-lesson-panel .print-meta-grid span b {
        font-size: 7.5pt !important;
        color: #5a6d85 !important;
        text-transform: uppercase !important;
    }

    /* Keep standard text elements colored and styled */
    body.print-lesson-mode #active-lesson-panel p,
    body.print-lesson-mode #active-lesson-panel li,
    body.print-lesson-mode #active-lesson-panel span,
    body.print-lesson-mode #active-lesson-panel div {
        color: #152033 !important;
    }

    /* Premium styled tables (SaveMyExams style but keeping site palette) */
    body.print-lesson-mode #active-lesson-panel .lesson-prose table {
        display: table !important;
        width: 100% !important;
        border-collapse: separate !important;
        border-spacing: 0 !important;
        margin: 16pt 0 !important;
        font-size: 9.5pt !important;
        background: #ffffff !important;
        border: 1px solid #cfdcec !important;
        border-radius: 8px !important;
        overflow: hidden !important;
    }

    body.print-lesson-mode #active-lesson-panel .lesson-prose th {
        background: #edf3fa !important;
        color: #152033 !important;
        font-weight: 700 !important;
        padding: 8pt 10pt !important;
        border-bottom: 1px solid #cfdcec !important;
        border-right: 1px solid #cfdcec !important;
        text-align: left !important;
    }

    body.print-lesson-mode #active-lesson-panel .lesson-prose th:last-child {
        border-right: 0 !important;
    }

    body.print-lesson-mode #active-lesson-panel .lesson-prose td {
        padding: 8pt 10pt !important;
        border-bottom: 1px solid #cfdcec !important;
        border-right: 1px solid #cfdcec !important;
        color: #152033 !important;
    }

    body.print-lesson-mode #active-lesson-panel .lesson-prose td:last-child {
        border-right: 0 !important;
    }

    body.print-lesson-mode #active-lesson-panel .lesson-prose tr:last-child td {
        border-bottom: 0 !important;
    }

    body.print-lesson-mode #active-lesson-panel .lesson-prose tr:nth-child(even) {
        background-color: #fcfdfe !important;
    }

    /* Callout blocks (Tips, warnings, etc.) - Keep beautiful colors and borders */
    body.print-lesson-mode #active-lesson-panel .tip-panel,
    body.print-lesson-mode #active-lesson-panel .info-panel,
    body.print-lesson-mode #active-lesson-panel .warning-panel {
        border-left-width: 4px !important;
        border-radius: 6px !important;
        padding: 12pt !important;
        margin: 12pt 0 !important;
        break-inside: avoid !important;
        page-break-inside: avoid !important;
    }

    body.print-lesson-mode #active-lesson-panel .tip-panel {
        background: #fff2d6 !important;
        border-color: #b46e11 !important;
        color: #b46e11 !important;
    }

    body.print-lesson-mode #active-lesson-panel .warning-panel {
        background: #fff0ef !important;
        border-color: #d14343 !important;
        color: #d14343 !important;
    }

    body.print-lesson-mode #active-lesson-panel .info-panel {
        background: #e8f1ff !important;
        border-color: #1a6dff !important;
        color: #1252c4 !important;
    }

    /* Diagram blocks matching website style */
    body.print-lesson-mode .science-visual,
    body.print-lesson-mode .diagram-print-frame,
    body.print-lesson-mode .diagram-frame {
        border: 1px solid #cfdcec !important;
        border-radius: 8px !important;
        padding: 14pt !important;
        background: #ffffff !important;
        margin: 18pt auto !important;
        max-width: 100% !important;
        page-break-inside: avoid !important;
        break-inside: avoid !important;
        box-shadow: none !important;
    }

    body.print-lesson-mode .science-visual-head {
        border-bottom: 1px solid #cfdcec !important;
        padding-bottom: 6pt !important;
        margin-bottom: 12pt !important;
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
    }

    body.print-lesson-mode .science-visual-head strong {
        color: #152033 !important;
        font-size: 11pt !important;
    }

    body.print-lesson-mode .science-visual-head span {
        background: #e8f1ff !important;
        color: #1252c4 !important;
        border: 1px solid #cfdcec !important;
        padding: 2pt 6pt !important;
        font-size: 8pt !important;
        border-radius: 4px !important;
        text-transform: uppercase !important;
    }

    /* ── SVG & Mermaid: force light-mode for all diagram types ── */

    /* SVG canvas background */
    svg,
    .mermaid svg,
    .simple-flow-svg,
    .science-visual svg {
        background: #ffffff !important;
    }

    /* Mermaid — core nodes (flowchart, graph) */
    .mermaid .node rect,
    .mermaid .node circle,
    .mermaid .node ellipse,
    .mermaid .node polygon {
        fill: #edf3fa !important;
        stroke: #a8bdd3 !important;
        stroke-width: 1.5px !important;
    }
    .mermaid .node path {
        fill: #edf3fa !important;
        stroke: #a8bdd3 !important;
    }
    .mermaid .node text,
    .mermaid .nodeLabel,
    .mermaid .node .label {
        fill: #152033 !important;
        color: #152033 !important;
    }

    /* Mermaid — edges / arrows */
    .mermaid .edgePath .path,
    .mermaid .flowchart-link {
        stroke: #1a6dff !important;
        stroke-width: 1.75px !important;
        fill: none !important;
    }
    .mermaid .marker,
    .mermaid .arrowMarkerPath {
        fill: #1a6dff !important;
        stroke: #1a6dff !important;
    }

    /* Mermaid — edge labels */
    .mermaid .edgeLabel rect,
    .mermaid .labelBox {
        fill: #ffffff !important;
        stroke: #cfdcec !important;
    }
    .mermaid .edgeLabel text,
    .mermaid .edgeLabel span {
        fill: #1252c4 !important;
        color: #1252c4 !important;
        background: transparent !important;
    }

    /* Mermaid — subgraph clusters */
    .mermaid .cluster rect {
        fill: #f2f6fb !important;
        stroke: #cfdcec !important;
    }
    .mermaid .cluster text {
        fill: #5a6d85 !important;
    }

    /* Mermaid — sequence diagrams */
    .mermaid .actor {
        fill: #edf3fa !important;
        stroke: #a8bdd3 !important;
    }
    .mermaid text.actor,
    .mermaid .actor > text {
        fill: #152033 !important;
    }
    .mermaid .messageLine0,
    .mermaid .messageLine1 {
        stroke: #1a6dff !important;
        stroke-dasharray: none !important;
    }
    .mermaid .messageText {
        fill: #152033 !important;
        stroke: none !important;
    }
    .mermaid .note rect {
        fill: #fff9e6 !important;
        stroke: #e6b800 !important;
    }
    .mermaid .noteText {
        fill: #152033 !important;
    }
    .mermaid .loopText,
    .mermaid .loopLine {
        fill: #5a6d85 !important;
        stroke: #a8bdd3 !important;
    }
    .mermaid .activation0,
    .mermaid .activation1,
    .mermaid .activation2 {
        fill: #dfeaf5 !important;
        stroke: #a8bdd3 !important;
    }

    /* Mermaid — Gantt charts */
    .mermaid .grid .tick line {
        stroke: #cfdcec !important;
    }
    .mermaid .grid path {
        stroke-width: 0 !important;
    }
    .mermaid .today {
        stroke: #d14343 !important;
        fill: none !important;
    }
    .mermaid rect.task {
        fill: #1a6dff !important;
        stroke: #1252c4 !important;
    }
    .mermaid rect.task0 { fill: #3b82f6 !important; stroke: #2563eb !important; }
    .mermaid rect.task1 { fill: #8b5cf6 !important; stroke: #7c3aed !important; }
    .mermaid rect.task2 { fill: #10b981 !important; stroke: #059669 !important; }
    .mermaid text.taskText,
    .mermaid text.taskTextOutsideRight,
    .mermaid text.taskTextOutsideLeft {
        fill: #ffffff !important;
    }
    .mermaid .taskTextOutsideRight,
    .mermaid .taskTextOutsideLeft {
        fill: #152033 !important;
    }
    .mermaid .sectionTitle {
        fill: #152033 !important;
    }
    .mermaid .section0,
    .mermaid .section1,
    .mermaid .section2 {
        fill: #f2f6fb !important;
        opacity: 1 !important;
    }

    /* Mermaid — pie charts */
    .mermaid .pieTitleText {
        fill: #152033 !important;
    }
    .mermaid .slice text {
        fill: #ffffff !important;
    }
    .mermaid .legend text {
        fill: #152033 !important;
    }

    /* Mermaid — state diagrams */
    .mermaid .stateLabel text {
        fill: #152033 !important;
    }
    .mermaid .statediagram-state rect,
    .mermaid rect.state {
        fill: #edf3fa !important;
        stroke: #a8bdd3 !important;
    }
    .mermaid .transition {
        stroke: #1a6dff !important;
    }
    .mermaid .start-state,
    .mermaid .end-state-outer {
        fill: #152033 !important;
    }
    .mermaid .end-state-inner {
        fill: #152033 !important;
    }

    /* Mermaid — class diagrams */
    .mermaid .classBox rect,
    .mermaid .divider {
        fill: #edf3fa !important;
        stroke: #a8bdd3 !important;
    }
    .mermaid .classLabel .label rect {
        fill: #1a6dff !important;
    }
    .mermaid .classLabel .label text {
        fill: #ffffff !important;
    }
    .mermaid .relation {
        stroke: #1a6dff !important;
        fill: none !important;
    }

    /* Mermaid — dark backdrop reset (Mermaid injects a full-canvas background rect) */
    .mermaid svg > rect:first-child,
    .mermaid .background {
        fill: #ffffff !important;
    }

    /* ── LaTeX / MathJax: fix blank equations in print ── */

    /* MathJax renders into SVG using <use href> pointing to a global <defs> cache
       that lives outside #active-lesson-panel. The blanket visibility:hidden rule
       hides that cache element, making every glyph blank. Force it visible here. */
    #MJX-SVG-global-cache,
    #MathJax_SVG_glyphs,
    mjx-svg-cache,
    [id^="MJX-"],
    [id^="MathJax_SVG"] {
        visibility: visible !important;
        display: block !important;
        position: absolute !important;
        width: 0 !important;
        height: 0 !important;
        overflow: hidden !important;
    }

    /* MathJax rendered containers */
    mjx-container,
    mjx-container svg,
    mjx-container svg use,
    mjx-container svg path,
    mjx-container svg rect,
    .MathJax,
    .MathJax svg,
    .MathJax svg use,
    .MathJax svg path {
        visibility: visible !important;
        color: #152033 !important;
        fill: #152033 !important;
    }

    mjx-container[display="true"],
    mjx-container[display="true"] > svg {
        display: block !important;
        margin: 10pt auto !important;
        max-width: 100% !important;
        overflow: visible !important;
    }

    mjx-container:not([display="true"]),
    mjx-container:not([display="true"]) > svg {
        display: inline-block !important;
        max-width: 100% !important;
        vertical-align: middle !important;
    }

    /* ── Diagram & Chart sizing: fit to A4 page width ── */

    /* All SVG diagrams: constrain to page column width, let height scale naturally */
    body.print-lesson-mode .science-visual,
    body.print-lesson-mode .science-visual-stage,
    body.print-lesson-mode .diagram-print-frame,
    body.print-lesson-mode .diagram-frame {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        break-inside: avoid !important;
        page-break-inside: avoid !important;
    }

    /* SVG elements inside diagrams: fill width, auto height */
    body.print-lesson-mode .science-visual svg,
    body.print-lesson-mode .science-visual-stage svg,
    body.print-lesson-mode .diagram-print-frame svg,
    body.print-lesson-mode .mermaid svg {
        display: block !important;
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        /* Remove Mermaid's fixed pixel width/height attributes via CSS override */
        min-height: 0 !important;
        /* Cap very tall diagrams so they don't bleed across many pages */
        max-height: 22cm !important;
        overflow: visible !important;
    }

    /* Plotly & Chart.js render to <canvas>; the JS copies to an image for print.
       Ensure the image/canvas fits inside page bounds. */
    body.print-lesson-mode .science-visual canvas,
    body.print-lesson-mode .science-visual img,
    body.print-lesson-mode .science-visual-stage canvas,
    body.print-lesson-mode .science-visual-stage img {
        display: block !important;
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        max-height: 18cm !important;
        object-fit: contain !important;
    }

    /* Simple flow SVG — already has explicit width:100% but enforce max-height */
    body.print-lesson-mode .simple-flow-svg {
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        max-height: 20cm !important;
    }

    /* Serialized diagram print pages (landscape slices) */
    body.print-lesson-mode .diagram-print-page {
        display: block !important;
        width: 100% !important;
        break-before: page !important;
        page-break-before: always !important;
    }
    body.print-lesson-mode .diagram-print-page.landscape {
        break-before: page !important;
    }
    body.print-lesson-mode .diagram-print-frame {
        display: block !important;
        width: 100% !important;
    }
    body.print-lesson-mode .diagram-print-frame img,
    body.print-lesson-mode .diagram-print-frame svg {
        width: 100% !important;
        height: auto !important;
        max-width: 100% !important;
    }
    body.print-lesson-mode .diagram-print-label {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        padding: 4pt 0 6pt !important;
        border-bottom: 1px solid #cfdcec !important;
        margin-bottom: 8pt !important;
        font-size: 9pt !important;
        font-weight: 700 !important;
        color: #152033 !important;
    }
    body.print-lesson-mode .diagram-print-label span {
        color: #5a6d85 !important;
        font-size: 8pt !important;
        font-weight: 400 !important;
    }

    /* When a science-visual has been serialized into print pages, hide the live stage */
    body.print-lesson-mode .science-visual.has-print-diagram-pages .science-visual-stage {
        display: none !important;
    }

    /* Ensure math blocks are legible */
    .MathJax,
    .MathJax span {
        color: #152033 !important;
    }

    /* Hide non-printable UI components during PDF generation */
    .workspace-header,
    .site-nav,
    .course-sidebar,
    .ai-pane-shell,
    .workspace-beta-strip,
    .landing-footer,
    .course-action-btn,
    .btn-primary,
    .btn-secondary,
    button,
    #toast-container {
        display: none !important;
    }
}