/* ========================================
   Student Mental Model Gallery - Styles
   Cosmic/Space Theme
   ======================================== */

/* Utility */
.hidden { display: none !important; }

/* CSS Custom Properties (Theme Variables) */
:root {
    /* Dark Theme (Moonlight) - Default */
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-tertiary: #1a1a3a;
    --text-primary: #e8e8ff;
    --text-secondary: #a8a8d8;
    --text-muted: #6868a8;

    /* Accent Colors */
    --accent-pink: #ff41c3;
    --accent-purple: #a855f7;
    --accent-cyan: #06b6d4;
    --accent-blue: #3b82f6;
    --accent-yellow: #fbbf24;

    /* Glow Effects */
    --glow-purple: rgba(168, 85, 247, 0.4);
    --glow-pink: rgba(255, 107, 157, 0.4);
    --glow-cyan: rgba(6, 182, 212, 0.3);

    /* Gradients */
    --gradient-cosmic: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-sunset: linear-gradient(135deg, #eac64e 0%, #e83cbd 100%);
    --gradient-aurora: linear-gradient(135deg, #f755e1 0%, #6366f1 100%);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;

    /* Typography */
    --font-display: 'Press Start 2P', cursive;
    --font-body: 'JetBrains Mono', monospace;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
}

/* Light Theme (Sunshine) */
[data-theme="light"] {
    --bg-primary: #f0f4ff;
    --bg-secondary: #e0e8ff;
    --bg-tertiary: #d0d8ff;
    --text-primary: #1a1a3a;
    --text-secondary: #3a3a6a;
    --text-muted: #6a6a9a;

    --glow-purple: rgba(168, 85, 247, 0.3);
    --glow-pink: rgba(255, 107, 157, 0.3);
    --glow-cyan: rgba(6, 182, 212, 0.2);
}

/* ========================================
   Base Styles
   ======================================== */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ========================================
   Particle Background
   ======================================== */

#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

/* ========================================
   Shooting Stars
   ======================================== */

.shooting-star {
    position: fixed;
    width: 4px;
    height: 4px;
    background: rgb(255, 192, 20);
    border-radius: 50%;
    box-shadow: 0 0 10px 2px rgba(255, 255, 255, 0.8);
    animation: shootingStar 3s linear infinite;
    opacity: 0;
    z-index: 0;
}

.shooting-star::before {
    content: '';
    position: absolute;
    width: 50px;
    height: 2px;
    background: linear-gradient(90deg, rgba(255, 87, 207, 0.8), transparent);
    transform: translateX(0%);
    top: 50%;
    margin-top: -1px;
}

.shooting-star:nth-child(1) {
    top: 10%;
    left: 70%;
    animation-delay: 0s;
}

.shooting-star:nth-child(2) {
    top: 30%;
    left: 85%;
    animation-delay: 1.5s;
}

.shooting-star:nth-child(3) {
    top: 50%;
    left: 60%;
    animation-delay: 2.5s;
}

[data-theme="light"] .shooting-star {
    background: var(--accent-purple);
    box-shadow: 0 0 15px 3px var(--glow-purple);
}

[data-theme="light"] .shooting-star::before {
    background: linear-gradient(90deg, rgba(255, 179, 207, 0.8),rgba(255, 228, 92, 0.8) transparent);
}

@keyframes shootingStar {
    0% {
        opacity: 0;
        transform: translate(0, 0) rotate(-45deg);
    }
    10% {
        opacity: 1;
    }
    70% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate(-300px, 300px) rotate(-45deg);
    }
}

/* ========================================
   Theme Toggle Button
   ======================================== */

.theme-toggle {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--accent-purple);
    background: var(--bg-secondary);
    cursor: pointer;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    box-shadow: 0 0 20px var(--glow-purple);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 0 30px var(--glow-purple);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-icon {
    width: 28px;
    height: 28px;
    object-fit: contain;
    transition: all var(--transition-normal);
    position: absolute;
}

.theme-icon.moon {
    opacity: 1;
    transform: rotate(0deg);
}

.theme-icon.sun {
    opacity: 0;
    transform: rotate(-90deg);
}

[data-theme="light"] .theme-icon.moon {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="light"] .theme-icon.sun {
    opacity: 1;
    transform: rotate(0deg);
}

[data-theme="light"] .theme-toggle {
    background: white;
    border-color: var(--accent-yellow);
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.4);
}

/* ========================================
   Container
   ======================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-lg);
    position: relative;
    z-index: 1;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    text-align: center;
    padding: var(--space-xl) 0;
    margin-bottom: var(--space-xxs);
}

.title {
    font-family: var(--font-display);
    font-size: clamp(1rem, 4vw, 2rem);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
    background: linear-gradient(
        90deg,
        var(--accent-pink),
        var(--accent-purple),
        var(--accent-cyan),
        var(--accent-blue),
        var(--accent-purple),
        var(--accent-pink)
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 8s linear infinite;
}

.title-decoration {
    display: inline-block;
    animation: twinkle 1.5s ease-in-out infinite;
    margin: 0 var(--space-sm);
}

.title-decoration:last-child {
    animation-delay: 0.75s;
}

@keyframes gradientShift {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

@keyframes twinkle {
    0%, 100% {
        opacity: 0.5;
        transform: scale(0.8);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}

.subtitle {
    font-size: clamp(0.8rem, 1.8vw, 1rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.sparkles {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    font-size: 1.5rem;
}

.sparkles span {
    animation: float 3s ease-in-out infinite;
}

.sparkles span:nth-child(2) {
    animation-delay: 0.5s;
}

.sparkles span:nth-child(3) {
    animation-delay: 1s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-10px) rotate(5deg);
    }
}

/* ========================================
   Gallery Section
   ======================================== */

.gallery-section {
    min-height: 400px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--space-lg);
}

/* ========================================
   Gallery Cards
   ======================================== */

.gallery-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(168, 85, 247, 0.2);
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(30px) scale(0.95);
    animation: cardEntrance 0.6s ease forwards;
    position: relative;
}

.gallery-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--radius-lg);
    padding: 2px;
    background: linear-gradient(
        135deg,
        var(--accent-pink),
        var(--accent-purple),
        var(--accent-cyan)
    );
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.gallery-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow:
        0 20px 40px rgba(255, 8, 243, 0.3),
        0 0 30px var(--glow-purple);
}

.gallery-card:hover::before {
    opacity: 1;
}

@keyframes cardEntrance {
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.card-image-container {
    position: relative;
    width: 100%;
    height: 160px;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.card-image,
.card-image-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-card:hover .card-image,
.gallery-card:hover .card-image-container video {
    transform: scale(1.1);
}

.card-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 600;
    color: rgb(228, 228, 228);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    background: linear-gradient(135deg,
        rgba(234, 107, 166, 0.5) 0%,
        rgba(251, 208, 38, 0.5) 16.66%,
        rgba(155, 232, 195, 0.5) 50%,
        rgba(144, 145, 247, 0.5) 66.66%,
        rgba(203, 149, 242, 0.5) 83.33%,
        rgba(253, 131, 206, 0.5) 100%);
}

.card-content {
    padding: var(--space-md);
}

.card-name {
    font-family: var(--font-display);
    font-size: 0.7rem;
    color: var(--accent-cyan);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.6;
}

.card-tool-tag {
    display: inline-block;
    font-size: 0.65rem;
    color: var(--accent-purple);
    border: 1px solid rgba(168, 85, 247, 0.3);
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    margin-bottom: var(--space-sm);
    letter-spacing: 0.5px;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    line-height: 1.4;
}

.card-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--gradient-aurora);
    color: white;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition-normal);
    opacity: 1;
}

.card-link:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--glow-purple);
}

/* ========================================
   Empty State
   ======================================== */

.empty-state {
    display: none;
    text-align: center;
    padding: var(--space-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--accent-purple);
}

.empty-state.visible {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
    animation: rocketFloat 2s ease-in-out infinite;
}

@keyframes rocketFloat {
    0%, 100% { transform: translateY(0) rotate(-10deg); }
    50% { transform: translateY(-15px) rotate(10deg); }
}

.empty-state h2 {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--accent-pink);
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.cta-button {
    display: inline-block;
    padding: var(--space-md) var(--space-lg);
    background: var(--gradient-sunset);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-normal);
    opacity: 0.9;
}

.cta-button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px var(--glow-pink);
}

/* ========================================
   Loading State
   ======================================== */

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    gap: var(--space-lg);
}

.loading-state.hidden {
    display: none;
}

.loader {
    width: 50px;
    height: 50px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--accent-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-state p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ========================================
   Footer
   ======================================== */

.footer {
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    margin-top: var(--space-xl);
    border-top: 1px solid rgba(168, 85, 247, 0.2);
}

.footer a {
    color: var(--accent-purple);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.footer a:hover {
    color: var(--accent-pink);
    text-shadow: 0 0 10px var(--glow-pink);
}

.footer-note {
    margin-top: var(--space-md);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ========================================
   Project Detail Modal
   ======================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.modal.visible {
    display: flex;
    animation: modalFadeIn 0.3s ease forwards;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 26, 0.9);
    backdrop-filter: blur(10px);
}

[data-theme="light"] .modal-backdrop {
    background: rgba(240, 244, 255, 0.95);
}

.modal-content {
    position: relative;
    max-width: 1400px;
    width: 95%;
    max-height: 90vh;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 2px solid rgba(168, 85, 247, 0.3);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px var(--glow-purple);
    overflow: hidden;
    animation: modalSlideUp 0.4s ease;
    z-index: 1001;
}

@keyframes modalSlideUp {
    from {
        transform: translateY(50px) scale(0.95);
    }
    to {
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1.5rem;
    line-height: 1;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--accent-pink);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 0 20px var(--glow-pink);
}

.modal-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1.8rem;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
}

.modal-nav:hover {
    background: var(--accent-purple);
    opacity: 1;
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 0 20px var(--glow-purple);
}

.modal-nav-prev {
    left: var(--space-md);
}

.modal-nav-next {
    right: var(--space-md);
}

.modal-body {
    display: flex;
    flex-direction: row;
    gap: var(--space-lg);
    padding: var(--space-xl);
    max-height: 85vh;
    overflow-y: auto;
}

.modal-image-container {
    flex: 2;
    min-width: 300px;
    max-width: 65%;
    max-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.modal-image,
.modal-image-container video {
    max-width: 100%;
    max-height: 70vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-md);
    cursor: zoom-in;
    transition: transform var(--transition-normal);
}

.modal-image:hover,
.modal-image-container video:hover {
    transform: scale(1.02);
}

.modal-image-placeholder {
    width: 100%;
    height: 100%;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 600;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    background: linear-gradient(135deg,
        rgba(234, 107, 166, 0.5) 0%,
        rgba(251, 208, 38, 0.5) 16.66%,
        rgba(155, 232, 195, 0.5) 50%,
        rgba(144, 145, 247, 0.5) 66.66%,
        rgba(203, 149, 242, 0.5) 83.33%,
        rgba(253, 131, 206, 0.5) 100%);
    border-radius: var(--radius-md);
}

.modal-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-height: 70vh;
}

.modal-name-row {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.modal-name {
    font-family: var(--font-display);
    font-size: 0.7rem;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.modal-tool-tag {
    display: inline-block;
    max-width: fit-content;
    font-size: 0.7rem;
    color: var(--accent-purple);
    border: 1px solid rgba(168, 85, 247, 0.3);
    border-radius: var(--radius-sm);
    padding: 2px 10px;
    letter-spacing: 0.5px;
}

.modal-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: var(--space-sm);
}

.modal-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    flex: 1 1 0;
    overflow-y: auto;
    min-height: 200px;
}

.modal-description.desc-small {
    font-size: 0.9rem;
    line-height: 1.7;
}

.modal-description.desc-tiny {
    font-size: 0.8rem;
    line-height: 1.6;
}

.modal-description a {
    color: var(--accent-purple);
    text-decoration: none;
    border-bottom: 1px solid var(--accent-purple);
    transition: all var(--transition-fast);
}

.modal-description a:hover {
    color: var(--accent-pink);
    border-bottom-color: var(--accent-pink);
    text-shadow: 0 0 8px var(--accent-pink);
}

.modal-link-container {
    margin-top: auto;
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

.modal-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: linear-gradient(135deg, rgba(234, 198, 78, 0.7) 0%, rgba(232, 60, 189, 0.7) 100%);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-normal);
    white-space: nowrap;
    flex: 1;
}

.modal-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px var(--glow-pink);
    background: var(--gradient-sunset);
}

#modalToolLink {
    background: linear-gradient(135deg, rgba(247, 85, 225, 0.8) 0%, rgba(99, 102, 241, 0.8) 100%);
}

#modalToolLink:hover {
    box-shadow: 0 0 30px var(--glow-purple);
    background: linear-gradient(135deg, rgba(247, 85, 225, 1) 0%, rgba(99, 102, 241, 1) 100%);
}

/* ========================================
   Fullscreen Image Viewer
   ======================================== */

.fullscreen-viewer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.fullscreen-viewer.visible {
    display: flex;
    animation: modalFadeIn 0.3s ease forwards;
}

.fullscreen-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    cursor: zoom-out;
}

.fullscreen-image,
.fullscreen-viewer video {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    width: auto;
    height: auto;
    object-fit: contain;
    z-index: 2001;
    cursor: zoom-out;
    will-change: transform;
    border-radius: var(--radius-sm);
    box-shadow: 0 0 50px rgba(168, 85, 247, 0.5);
}

.fullscreen-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1.8rem;
    line-height: 1;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
    z-index: 2002;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.8;
}

.fullscreen-close:hover {
    background: var(--accent-pink);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 0 20px var(--glow-pink);
    opacity: 1;
}

@media (max-width: 768px) {
    .fullscreen-close {
        top: var(--space-md);
        right: var(--space-md);
        width: 32px;
        height: 32px;
        font-size: 1.5rem;
    }
}

/* ========================================
   Sparkle Burst Effect
   ======================================== */

.sparkle {
    position: absolute;
    pointer-events: none;
    animation: sparkleBurst 2s ease forwards;
    z-index: 10;
}

@keyframes sparkleBurst {
    0% {
        opacity: 1;
        transform: scale(0) translateY(0);
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: scale(1) translateY(-30px);
    }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--space-md);
    }

    .hero {
        padding: var(--space-lg) 0;
    }

    .title {
        font-size: clamp(0.8rem, 5vw, 1.2rem);
    }

    .theme-toggle {
        top: var(--space-md);
        right: var(--space-md);
        width: 44px;
        height: 44px;
    }

    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-md);
    }

    .card-image-container {
        height: 180px;
    }

    .modal-body {
        flex-direction: column;
        padding: var(--space-lg);
    }

    .modal-info {
        max-height: none;
    }

    .modal-description {
        flex: 0 1 auto;
        overflow-y: visible;
    }

    .modal-link-container {
        text-align: center;
    }

    .modal-image-container {
        max-width: 100%;
        min-width: 100%;
        max-height: 60vh;
    }

    .modal-image,
    .modal-image-container video {
        max-height: 60vh;
    }

    .modal-image-placeholder {
        min-height: 200px;
        font-size: 1.5rem;
    }

    .modal-title {
        font-size: 1.4rem;
    }

    .modal-description {
        font-size: 0.9rem;
    }

    .modal-description.desc-small {
        font-size: 0.85rem;
    }

    .modal-description.desc-tiny {
        font-size: 0.75rem;
    }

    .modal-close {
        top: var(--space-sm);
        right: var(--space-sm);
        width: 28px;
        height: 28px;
        font-size: 1.3rem;
    }

    .modal-nav {
        width: 32px;
        height: 32px;
        font-size: 1.5rem;
    }

    .modal-nav-prev {
        left: var(--space-sm);
    }

    .modal-nav-next {
        right: var(--space-sm);
    }

    .modal-link {
        font-size: 0.9rem;
        padding: var(--space-sm) var(--space-md);
    }
}

@media (max-width: 600px) {
    .modal-image-container {
        min-width: 0;
    }

    .modal-body {
        padding: var(--space-lg) var(--space-md);
    }
}

@media (max-width: 480px) {
    .title-decoration {
        display: none;
    }

    .hero {
        padding: var(--space-md) 0;
        margin-bottom: var(--space-md);
    }

    .sparkles {
        gap: var(--space-md);
        font-size: 1.2rem;
        margin-bottom: var(--space-xxs);
    }

    .gallery-grid {
        gap: var(--space-sm);
    }

    .card-content {
        padding: var(--space-sm);
    }

    .card-name {
        font-size: 0.5rem;
        margin-bottom: 0.15rem;
    }

    .card-title {
        font-size: 0.7rem;
        margin-bottom: 0.4rem;
        line-height: 1.3;
    }

    .card-link {
        padding: 0.3rem 0.5rem;
        font-size: 0.65rem;
    }

    .card-image-container {
        height: 120px;
    }

    .modal-body {
        padding: var(--space-md);
        gap: var(--space-md);
    }

    .modal-content {
        width: 98%;
    }

    .modal-image-container {
        min-width: 0;
        max-height: 50vh;
    }

    .modal-image,
    .modal-image-container video {
        max-height: 50vh;
    }

    .modal-image-placeholder {
        min-height: 150px;
        font-size: 1.2rem;
    }

    .modal-title {
        font-size: 1.2rem;
    }

    .modal-description {
        font-size: 0.85rem;
    }

    .modal-description.desc-small {
        font-size: 0.8rem;
    }

    .modal-description.desc-tiny {
        font-size: 0.7rem;
    }

    .modal-link {
        font-size: 0.8rem;
        padding: var(--space-sm);
        white-space: nowrap;
    }
}

/* ========================================
   Accessibility
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .shooting-star {
        display: none;
    }
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 4px;
}

/* ========================================
   Homepage Navigation Buttons
   ======================================== */

.page-nav {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: var(--space-xl);
    padding: var(--space-sm) 0 var(--space-xl);
    flex-wrap: wrap;
}

.nav-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg) var(--space-xl);
    min-width: 280px;
    min-height: 100px;
    border-radius: var(--radius-lg);
    border: 2px solid rgba(168, 85, 247, 0.4);
    background: var(--bg-secondary);
    text-decoration: none;
    cursor: pointer;
    overflow: visible;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
    box-shadow: 0 0 20px var(--glow-purple);
}

.nav-button:hover {
    transform: translateY(-8px) scale(1.03);
    border-color: rgba(168, 85, 247, 0.9);
    box-shadow:
        0 20px 40px rgba(168, 85, 247, 0.3),
        0 0 40px var(--glow-purple);
}

.nav-button__label {
    font-family: var(--font-display);
    font-size: clamp(0.65rem, 2vw, 0.95rem);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1.6;
    background: var(--gradient-aurora);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    z-index: 1;
    pointer-events: none;
}

/* ========================================
   Sparkle Overlay (Button Hover Effect)
   ======================================== */

.sparkle-overlay {
    position: absolute;
    inset: -60px;
    pointer-events: none;
    overflow: visible;
    z-index: 0;
}

/* ========================================
   Back to Home Link (Gallery Pages)
   ======================================== */

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 0.55rem;
    color: var(--accent-purple);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1.6;
    position: fixed;
    top: var(--space-lg);
    left: var(--space-lg);
    z-index: 100;
    transition: color var(--transition-normal), transform var(--transition-normal);
}

.back-link:hover {
    color: var(--accent-pink);
    text-shadow: 0 0 10px var(--glow-pink);
    transform: translateX(-3px);
}

/* ========================================
   Scroll To Top Button
   ======================================== */

.scroll-top-btn {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid rgba(168, 85, 247, 0.4);
    background: var(--bg-secondary);
    color: var(--accent-purple);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 500;
    opacity: 1;
    transition: opacity var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
    box-shadow: 0 0 16px var(--glow-purple);
}

.scroll-top-btn svg {
    width: 18px;
    height: 18px;
}

.scroll-top-btn:hover {
    transform: translateY(-3px);
    border-color: rgba(168, 85, 247, 0.9);
    box-shadow: 0 0 28px var(--glow-purple);
}

.scroll-top-btn.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
}

/* ========================================
   Filter Bar (Student Tools Page)
   ======================================== */

.filter-bar {
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-lg);
}

.filter-row {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.filter-select-wrap {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.filter-group-label {
    font-family: var(--font-display);
    font-size: 0.55rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
}

.filter-divider {
    color: var(--text-secondary);
    opacity: 0.3;
    font-size: 1.1rem;
}

.filter-dropdown {
    position: relative;
}

.filter-select {
    font-family: var(--font-body);
    font-size: 0.8rem;
    padding: 4px 14px;
    border-radius: 999px;
    border: 1px solid rgba(168, 85, 247, 0.25);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-select:hover {
    border-color: rgba(168, 85, 247, 0.6);
    color: var(--accent-purple);
}

.filter-select.active {
    background: rgba(168, 85, 247, 0.15);
    border-color: rgba(168, 85, 247, 0.7);
    color: var(--accent-purple);
    box-shadow: 0 0 8px var(--glow-purple);
}

.filter-options {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    background: var(--bg-secondary);
    border: 1px solid rgba(168, 85, 247, 0.3);
    border-radius: var(--radius-md);
    padding: 4px;
    z-index: 200;
    min-width: 140px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.filter-options.hidden {
    display: none;
}

.filter-option {
    font-family: var(--font-body);
    font-size: 0.8rem;
    padding: 6px 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    text-align: left;
    transition: all var(--transition-fast);
}

.filter-option:hover {
    background: rgba(168, 85, 247, 0.1);
    color: var(--accent-purple);
}

.filter-option.active {
    background: rgba(168, 85, 247, 0.15);
    color: var(--accent-purple);
}

/* ========================================
   Homepage Responsive
   ======================================== */

@media (max-width: 640px) {
    .page-nav {
        flex-direction: column;
        gap: var(--space-lg);
    }

    .nav-button {
        min-width: 220px;
        min-height: 80px;
        padding: var(--space-md) var(--space-lg);
    }
}

@media (max-width: 480px) {
    .back-link {
        font-size: 0.45rem;
        top: var(--space-md);
        left: var(--space-md);
    }
}