@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600&display=swap');

:root {
    --bg: #05090f;
    --bg-secondary: rgba(15, 24, 44, 0.8);
    --primary: #3bd5ff;
    --accent: #ff7b4a;
    --text: #f3f6ff;
    --muted: #9bb4d6;
    --glass: rgba(10, 17, 34, 0.7);
    --border: rgba(255, 255, 255, 0.08);
    --success: #56ffac;
    --danger: #ff5c71;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Space Grotesk', 'Microsoft YaHei', sans-serif;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    line-height: 1.6;
    background-image: radial-gradient(circle at 20% 20%, rgba(59, 213, 255, 0.15), transparent 45%),
        radial-gradient(circle at 80% 0%, rgba(255, 123, 74, 0.15), transparent 35%);
}

img {
    max-width: 100%;
    display: block;
    border-radius: 12px;
}

main {
    width: min(1200px, 90%);
    margin: -80px auto 80px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.hero {
    position: relative;
    padding: 100px 5% 140px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(7, 13, 27, 0.9), rgba(5, 118, 176, 0.65));
}

.hero--login {
    min-height: 460px;
    background-image: linear-gradient(135deg, rgba(7, 13, 27, 0.6), rgba(5, 118, 176, 0.5)),
        url('assets/images/login-hero.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero--teaching {
    min-height: 360px;
}

.hero--assessment {
    min-height: 360px;
    background: linear-gradient(135deg, rgba(7, 13, 27, 0.9), rgba(209, 67, 67, 0.65));
}

.hero__content {
    max-width: 720px;
    position: relative;
    z-index: 2;
}

.login-page .hero__content {
    margin: 0 auto;
    text-align: center;
}

.login-page .hero__content h1 {
    margin: 0 auto;
}

.login-page .hero__content .subtitle {
    margin: 16px auto 0;
    max-width: 640px;
}

.login-page .hero--login {
    padding: 100px 5% 130px;
}

.login-page main {
    margin-top: -210px;
    margin-bottom: 20px;
}

.hero__visual {
    position: absolute;
    right: 12%;
    top: 45%;
    transform: translateY(-50%);
    width: 30%;
    height: 52%;
    background-size: cover;
    background-position: center 20%;
    border-radius: 24px;
    filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.45));
    opacity: 0.9;
    border: none;
}

.teaching-page .hero__visual {
    right: 12%;
    top: 50%;
    width: 34%;
    height: 63%;
    background-position: center;
    mix-blend-mode: lighten;
    filter: drop-shadow(0 20px 50px rgba(63, 151, 255, 0.25));
}
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(59, 213, 255, 0.18);
    color: var(--primary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.subtitle {
    margin-top: 12px;
    color: var(--muted);
}

.card {
    border-radius: 24px;
    padding: 32px;
}

.glass-panel {
    background: var(--glass);
    border: 1px solid var(--border);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow);
}

.site-footer {
    text-align: center;
    color: var(--muted);
    padding: 40px 0;
}

/* Login */
button {
    font: inherit;
    border: none;
    cursor: pointer;
}

.primary {
    padding: 12px 20px;
    border-radius: 999px;
    background: linear-gradient(120deg, var(--primary), #7df0ff);
    color: #020611;
    font-weight: 600;
    text-transform: uppercase;
}

.ghost {
    padding: 12px 20px;
    border-radius: 999px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--text);
    font-weight: 500;
}

.mode-switch {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.mode-btn {
    border-radius: 20px;
    padding: 18px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-align: left;
    color: var(--text);
    transition: transform 0.3s ease, border 0.3s;
}

.mode-btn:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.mode-btn:disabled,
.mode-btn.is-disabled {
    cursor: not-allowed;
    opacity: 0.5;
    transform: none;
    border-color: rgba(255, 255, 255, 0.08);
}

.mode-btn span {
    font-size: 1.2rem;
    font-weight: 600;
}

.mode-btn small {
    display: block;
    color: var(--muted);
    margin-top: 6px;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.preview-card {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 24px;
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
}

.preview-carousel {
    margin-top: 16px;
    overflow: hidden;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.preview-carousel__track {
    display: flex;
    width: 300%;
    animation: slide 18s linear infinite;
}

.preview-carousel img {
    width: 100%;
    object-fit: cover;
}

@keyframes slide {
    0% { transform: translateX(0); }
    33% { transform: translateX(-100%); }
    66% { transform: translateX(-200%); }
    100% { transform: translateX(0); }
}

.task-list {
    list-style: none;
    padding: 0;
    margin: 16px 0 0;
    color: var(--muted);
}

.task-list li {
    margin-bottom: 8px;
}

/* Teaching page */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.back-link {
    color: var(--primary);
    text-decoration: none;
}

.nav-tag {
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-tag.danger {
    border-color: var(--danger);
    color: var(--danger);
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

.scene-switcher__controls {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

@media (max-width: 1000px) {
    .scene-switcher__controls {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .scene-switcher__controls {
        grid-template-columns: 1fr;
    }
}

.scene-switcher__controls button {
    min-width: 0;
    padding: 12px 14px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    border: 1px solid transparent;
    text-align: left;
}

.scene-switcher__controls button.active {
    border-color: var(--primary);
    color: var(--primary);
}

.scene-switcher__display {
    margin-top: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    align-items: center;
}

.scene-switcher__image {
    width: 100%;
    height: 280px;
    border-radius: 18px;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.scene-switcher__image.is-link {
    cursor: pointer;
    box-shadow: 0 0 0 2px rgba(59, 213, 255, 0.4);
}

.fire-training {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    align-items: stretch;
}

.fire-training__media {
    border-radius: 24px;
    min-height: 260px;
    background-size: cover;
    background-position: center;
    box-shadow: var(--shadow);
}

.fire-training__info {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 24px;
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.fire-training__info ul {
    padding-left: 20px;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 999;
}

.modal.active {
    opacity: 1;
    pointer-events: auto;
}

.modal__content {
    position: relative;
    width: min(720px, 92vw);
    padding: 32px;
    border-radius: 24px;
    background: #0b152d;
    box-shadow: var(--shadow);
}

.modal__content--large {
    padding: 0;
    border-radius: 28px;
    overflow: hidden;
    position: relative;
}

.modal__close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(0, 0, 0, 0.5);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text);
    z-index: 20;
}

.video-container {
    margin-top: 16px;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
}

.video-grid {
    margin-top: 16px;
    display: flex;
    gap: 20px;
    align-items: stretch;
}

.fire-video-section {
    padding: 20px;
}

.fire-video-section .video-grid {
    gap: 12px;
}

.video-grid .video-container {
    margin-top: 0;
    flex: 1 1 0;
    min-width: 0;
}

.video-grid .video-player {
    height: 320px;
}

.video-player {
    width: 100%;
    height: 320px;
    display: block;
    background: #000;
}

.video-caption {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border-left: 4px solid var(--accent);
}

/* VR Modal */
.modal--fullscreen .modal__content {
    width: 95vw;
    height: 90vh;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
    background: #000;
}

.vr-header {
    padding: 16px 24px;
    background: rgba(0, 0, 0, 0.8);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    pointer-events: none;
}

.vr-header h3 {
    margin: 0;
    color: var(--text);
}

.vr-header p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.vr-viewer {
    flex: 1;
    width: 100%;
    height: 100%;
}

.placeholder-viewer {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    text-align: center;
    color: var(--muted);
}

.external-link {
    color: var(--primary);
    text-decoration: underline;
}

.icon-marker {
    display: inline-block;
    filter: drop-shadow(0 0 4px rgba(255, 0, 0, 0.5));
}

.marker-icon {
    font-size: 28px;
    text-shadow: 0 0 8px rgba(255, 0, 0, 0.7);
}


/* Assessment page */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-top: 6px;
}

.stats-grid div {
    background: rgba(255, 255, 255, 0.05);
    padding: 12px;
    border-radius: 12px;
    text-align: center;
}

.stats-label {
    display: block;
    color: var(--muted);
    font-size: 0.85rem;
}

.mission-flow .flow-steps {
    list-style: none;
    padding: 0;
    margin: 0 0 18px;
    display: grid;
    gap: 12px;
}

.flow-steps li {
    padding: 14px 18px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.04);
    border-left: 4px solid transparent;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.flow-steps li.active {
    border-color: var(--primary);
    background: rgba(59, 213, 255, 0.12);
}

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

.mission-entry-actions .primary {
    padding: 8px 18px;
}

.start-assessment {
    text-align: center;
    margin-top: 0px;
}
.countdown-only {
    display: none;
}

body.mission-one {
    background: radial-gradient(circle at top, rgba(59, 213, 255, 0.15), rgba(2, 6, 17, 0.95));
}

.mission-two .hero--assessment {
    background: linear-gradient(135deg, rgba(7, 13, 27, 0.9), rgba(255, 140, 67, 0.65));
}

.mission-three .hero--assessment {
    background: linear-gradient(135deg, rgba(7, 13, 27, 0.9), rgba(92, 163, 255, 0.65));
}

.mission2-board {
    gap: 24px;
}

.mission2-questions {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.mission2-question {
    padding: 24px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    display: grid;
    gap: 18px;
}

.mission2-question__header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
}

.mission2-question__header > div:first-child {
    flex: 1;
}

.mission2-question__header .score-pill {
    margin-left: auto;
}

.mission2-question__header h3 {
    margin: 0;
}

.mission2-question__header p {
    margin: 8px 0 0;
    color: var(--muted);
}

.drag-question {
    display: grid;
    gap: 24px;
}

.drag-pool,
.drag-targets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.drag-option,
.drag-slot {
    padding: 14px;
    border-radius: 14px;
    border: 1px dashed rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.03);
    text-align: center;
    min-height: 64px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    color: var(--text);
    cursor: grab;
    user-select: none;
}

.drag-option {
    border-style: solid;
    background: rgba(59, 213, 255, 0.08);
}

.drag-option.dragging {
    opacity: 0.5;
}

.drag-slot.filled {
    border-color: var(--primary);
}

.drag-slot span {
    font-size: 0.8rem;
    color: var(--muted);
}

.drag-slot strong {
    font-size: 1.1rem;
}

.drag-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.drag-actions--full {
    justify-content: space-between;
    flex-wrap: wrap;
}

.mission-three-stage {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.mission-three .scenario-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(260px, 1fr));
    gap: 16px;
    align-items: stretch;
}

.mission-three .scenario-card {
    height: 100%;
    max-width: 560px;
}

.scenario-card {
    padding: 24px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.scenario-card__header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
}

.scenario-card__header h3 {
    margin: 0;
}

.scenario-card__header p {
    margin: 8px 0 0;
    color: var(--muted);
}

.mission-three .scenario-map {
    background-size: contain !important;
    background-position: center;
    background-repeat: no-repeat;
    aspect-ratio: 16 / 9 !important;
    height: auto !important;
    min-height: 220px;
}

@media (max-width: 900px) {
    .mission-three .scenario-grid {
        grid-template-columns: 1fr;
    }
    .mission-three .scenario-map {
        min-height: 180px;
    }
}

.mission-three .hazard-tooltip {
    min-width: 120px;
    max-width: 160px;
    padding: 6px 8px;
    font-size: 0.72rem;
}

.mission-three .hazard-tooltip h3 {
    font-size: 0.86rem;
}
.mission-three .hazard-tooltip p {
    font-size: 0.86rem;
    margin: 4px 0 0;
}

.mission3-actions {
    margin-top: 8px;
}
.scenario-hotspot {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.85);
    background: rgba(255, 92, 113, 0.85);
    box-shadow: 0 0 16px rgba(255, 92, 113, 0.85), 0 0 0 18px rgba(255, 92, 113, 0.18);
    opacity: 1;
    animation: pulse 1.8s ease-in-out infinite;
    transition: transform 0.2s ease;
}

.scenario-hotspot:hover {
    transform: scale(1.12);
}

.scenario-hotspot.discovered {
    transform: scale(1.1);
    box-shadow: 0 0 18px rgba(86, 255, 172, 0.8), 0 0 0 22px rgba(86, 255, 172, 0.18);
    border-color: rgba(86, 255, 172, 0.9);
    background: rgba(86, 255, 172, 0.85);
}

.mission-three-stage .hazard-tooltip {
    display: block;
}


.mission-one .hero__visual {
    opacity: 1;
    border: 2px solid rgba(255, 255, 255, 0.08);
}

.hazard-stage {
    display: grid;
    gap: 16px;
}

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

.score-pill {
    padding: 10px 16px;
    border-radius: 16px;
    background: rgba(59, 213, 255, 0.12);
    border: 1px solid rgba(59, 213, 255, 0.4);
    color: var(--text);
    font-weight: 700;
}

.score-pill[data-result="pending"] {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.12);
    color: var(--muted);
}

.score-pill[data-result="success"] {
    background: rgba(86, 255, 172, 0.15);
    border-color: rgba(86, 255, 172, 0.6);
    color: var(--success);
}

.score-pill[data-result="info"] {
    background: rgba(255, 123, 74, 0.15);
    border-color: rgba(255, 123, 74, 0.5);
    color: var(--accent);
}

.hazard-map {
    position: relative;
    width: 100%;
    aspect-ratio: 1368 / 768;
    border-radius: 20px;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    background-color: rgba(0, 0, 0, 0.25);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.hazard-spot {
    position: absolute;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    transform: translate(calc(-50% + var(--ox, 0px)), calc(-50% + var(--oy, 0px)));
    opacity: 0;
    pointer-events: auto;
    border: 2px solid transparent;
    background: transparent;
    box-shadow: none;
    animation: none;
}

.hazard-spot.discovered {
    opacity: 1;
    border: 2px solid rgba(255, 255, 255, 0.85);
    background: rgba(255, 92, 113, 0.9);
    box-shadow: 0 0 12px rgba(255, 92, 113, 0.6), 0 0 0 12px rgba(255, 92, 113, 0.12);
    animation: pulse 1.8s ease-in-out infinite;
}

.hazard-spot.found {
    background: rgba(255, 92, 113, 0.95);
    border-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 0 16px rgba(255, 92, 113, 0.85), 0 0 0 14px rgba(255, 92, 113, 0.18);
    animation: none;
}

.hazard-tooltip {
    position: absolute;
    min-width: 220px;
    max-width: 280px;
    padding: 14px 16px;
    border-radius: 14px;
    background: rgba(5, 10, 22, 0.92);
    border: 1px solid rgba(59, 213, 255, 0.4);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
    transform: translate(-50%, calc(-100% - 20px));
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
    backdrop-filter: blur(10px);
    z-index: 5;
}

.hazard-tooltip.active {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, calc(-100% - 12px));
}

.hazard-tooltip h3 {
    margin: 0;
    font-size: 1rem;
    color: var(--primary);
}

.mission-success {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    opacity: 0;
    padding: 40px 60px;
    border-radius: 24px;
    background: rgba(3, 9, 25, 0.95);
    border: 1px solid rgba(86, 255, 172, 0.4);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.45);
    text-align: center;
    color: var(--text);
    z-index: 1200;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.mission-success.active {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.mission-success h2 {
    margin: 0 0 12px;
    color: var(--success);
}

.mission-success p {
    margin: 0;
    color: var(--muted);
}

.hazard-tooltip p {
    margin: 6px 0 0;
    font-size: 0.92rem;
    color: var(--text);
}

.hazard-tooltip[data-position="bottom"] {
    transform: translate(-50%, 20px);
}

.hazard-tooltip[data-position="bottom"].active {
    transform: translate(-50%, 12px);
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(0.95); opacity: 0.85; }
    50% { transform: translate(-50%, -50%) scale(1.08); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(0.95); opacity: 0.85; }
}

.quiz__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#questionContainer {
    margin: 20px 0;
}

.question {
    margin-bottom: 16px;
}

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

.options li {
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
}

.options li.selected {
    border-color: var(--primary);
    background: rgba(59, 213, 255, 0.12);
}

.options li.correct {
    border-color: var(--success);
    background: rgba(86, 255, 172, 0.12);
}

.options li.incorrect {
    border-color: var(--danger);
    background: rgba(255, 92, 113, 0.12);
}

.scenario-board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.scenario-board article {
    background: rgba(255, 255, 255, 0.04);
    padding: 20px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: rgba(7, 15, 28, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 12px 18px;
    border-radius: 14px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
}

.toast.visible {
    opacity: 1;
    transform: translateY(0);
}

.toast[data-type="success"] {
    border-color: var(--success);
    color: var(--success);
}

.toast[data-type="error"] {
    border-color: var(--danger);
    color: var(--danger);
}

/* Responsive */
@media (max-width: 900px) {
    .hero {
        padding: 100px 24px 140px;
    }
    .hero__visual {
        position: static;
        transform: none;
        width: 100%;
        height: 220px;
        margin-top: 24px;
        background-position: center;
    }
    main {
        width: 92%;
    }
    .scene-switcher__controls button {
        flex: 1 1 45%;
    }
}
.scene-gallery {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.scene-gallery__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
}

.scene-gallery__item {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 20px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.scene-gallery__item h3 {
    margin: 0;
}

.scene-gallery__item p {
    margin: 6px 0 0;
    color: var(--muted);
}

.scene-gallery__image {
    width: 100%;
    height: 240px;
    border-radius: 18px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border: none;
}

.scene-gallery__item--link .scene-gallery__image {
    cursor: pointer;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.scene-gallery__item--link .scene-gallery__image::after {
    content: 'VR 浏览';
    position: absolute;
    bottom: 12px;
    right: 12px;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(5, 118, 176, 0.8);
    font-size: 0.78rem;
}

.scene-gallery__item--link .scene-gallery__image:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 32px rgba(0, 0, 0, 0.4);
}

/* ===== Login form ===== */
.login-form {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-top: 16px;
}

.login-input {
    flex: 1;
    min-width: 160px;
    padding: 12px 16px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border);
    color: var(--text);
    font: inherit;
    outline: none;
    transition: border-color 0.2s;
}

.login-input:focus {
    border-color: var(--primary);
}

.login-input::placeholder {
    color: var(--muted);
}

.student-greeting {
    font-size: 0.9rem;
    color: var(--primary);
    margin-bottom: 12px;
}

/* ===== Assessment results panel ===== */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

.result-card {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 16px;
    border: 1px solid var(--border);
}

.result-card--total {
    border-color: var(--primary);
    background: rgba(59, 213, 255, 0.08);
}

.result-label {
    font-size: 0.78rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-score {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.2;
}

.result-card--total .result-score {
    color: var(--primary);
}

.result-max {
    font-size: 0.8rem;
    color: var(--muted);
}

.cloud-submit-status {
    margin-bottom: 12px;
    font-size: 0.9rem;
    min-height: 1.4em;
}

.cloud-submit-status[data-state="loading"] { color: var(--muted); }
.cloud-submit-status[data-state="success"] { color: var(--success); }
.cloud-submit-status[data-state="error"]   { color: var(--danger); }
.cloud-submit-status[data-state="info"]    { color: var(--primary); }

/* ===== Analytics page ===== */
.preview-card--action {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.preview-card--action p {
    margin: 0;
    color: var(--muted);
}

.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.chart-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 18px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.chart-card h3 {
    margin: 0;
    font-size: 0.95rem;
    color: var(--muted);
}

.chart-canvas {
    width: 100%;
    height: 280px;
}

.analytics-summary .result-card--total .result-score {
    font-size: 1rem;
}

.field-hint {
    font-size: 0.78rem;
    color: var(--muted);
    margin: -4px 0 12px;
    word-break: break-all;
}

/* ===== Analytics compact layout ===== */
.analytics-page .hero {
    padding: 6px 0 4px;
    min-height: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.analytics-page .hero .top-nav {
    width: 100%;
}

.analytics-page .hero__content {
    text-align: center;
    max-width: 760px;
}

.analytics-page .hero__content h1 {
    font-size: 1.25rem;
    margin: 2px 0 4px;
}

.analytics-page .hero__content .subtitle {
    font-size: 0.76rem;
    margin: 0;
}

.analytics-page main {
    margin: 0 auto 16px;
    width: 100%;
}

.analytics-page #analyticsPage {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 8px 10px 10px;
    width: 100%;
    max-width: none;
}

.analytics-page #analyticsStatus {
    margin-bottom: 0;
    font-size: 0.78rem;
}

/* overview strip */
.analytics-page .analytics-overview {
    padding: 8px 12px;
}

.analytics-page .analytics-overview h2 {
    display: none;
}

.analytics-page .results-grid {
    grid-template-columns: repeat(5, minmax(100px, 1fr));
    gap: 6px;
    margin: 0;
}

.analytics-page .result-card {
    padding: 6px 10px;
}

.analytics-page .result-label {
    font-size: 0.62rem;
}

.analytics-page .result-score {
    font-size: 1rem;
}

.analytics-page .card {
    padding: 8px 10px;
    margin: 0;
}

.analytics-page .card h2 {
    font-size: 0.82rem;
    margin: 0 0 6px;
    font-weight: 600;
}

/* two-column rows */
.analytics-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.analytics-row--4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.analytics-row--charts {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

.analytics-row--single {
    grid-template-columns: 1fr;
}

.analytics-col {
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.analytics-col--1 {
    grid-column: span 1;
}

.analytics-col--2 {
    grid-column: span 2;
}

.analytics-page .chart-grid--2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.analytics-page .chart-grid--1 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px;
}

.analytics-page .chart-card {
    display: flex;
    flex-direction: column;
    padding: 6px 8px;
    gap: 4px;
}

.analytics-page .chart-card h3 {
    font-size: 0.72rem;
    margin: 0;
}

.analytics-page .chart-canvas {
    height: 190px;
    width: 100%;
}

.analytics-page .field-hint {
    margin: 0 0 4px;
    font-size: 0.62rem;
}

.analytics-page .field-hint:empty {
    display: none;
    margin: 0;
}

.analytics-page .site-footer {
    padding: 6px 0 8px;
    font-size: 0.7rem;
}

/* ===== Assessment page compact ===== */
.assessment-page .hero--assessment {
    min-height: auto;
    padding: 28px 5% 32px;
}

.assessment-page .hero__content h1 {
    font-size: 1.4rem;
    margin: 4px 0 6px;
}

.assessment-page .hero__content .subtitle {
    font-size: 0.82rem;
    margin: 0 0 10px;
}

.assessment-page .badge {
    font-size: 0.72rem;
    margin: 0 0 4px;
}

.assessment-page .stats-grid {
    gap: 12px;
    margin-top: 10px;
}

.assessment-page main {
    margin-top: 0;
    gap: 14px;
    padding: 16px 5% 20px;
    width: 100%;
    max-width: none;
    box-sizing: border-box;
}

.assessment-page .card {
    padding: 14px 18px;
}

.assessment-page .mission-flow h2 {
    font-size: 0.95rem;
    margin: 0 0 10px;
}

.assessment-page .mission-flow .flow-steps {
    gap: 8px;
    margin-bottom: 0;
}

.assessment-page .flow-steps li {
    padding: 10px 14px;
    gap: 5px;
}

.assessment-page .flow-steps li strong {
    font-size: 0.9rem;
}

.assessment-page .flow-steps li span {
    font-size: 0.78rem;
}

.assessment-page .mission-entry-actions {
    margin-top: 2px;
}

.assessment-page .mission-entry-actions .primary {
    padding: 6px 14px;
    font-size: 0.82rem;
}

.assessment-page #assessmentResults h2 {
    font-size: 0.95rem;
    margin: 0 0 6px;
}

.assessment-page #assessmentResults > p {
    font-size: 0.8rem;
    margin: 0 0 10px;
}

.assessment-page .results-grid {
    gap: 10px;
    margin: 0 0 12px;
}

.assessment-page .result-card {
    padding: 10px 12px;
}

.assessment-page .result-label {
    font-size: 0.68rem;
}

.assessment-page .result-score {
    font-size: 1.4rem;
}

.assessment-page .result-max {
    font-size: 0.7rem;
}

.assessment-page .site-footer {
    padding: 8px 0 10px;
    font-size: 0.75rem;
}