@import url('https://fonts.googleapis.com/css2?family=Prompt:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=Sarabun:wght@300;400;500;600;700&family=Inter:wght@400;500;600;700;800&family=Outfit:wght@400;600;700;800&display=swap');

/* ==========================================================================
   DESIGN SYSTEM & TOKENS
   ========================================================================== */
:root {
    /* Color Palette - Light Mode (Teal Accent Theme like comsci-sskru.vercel.app) */
    --bg-main: #f8f9fa;
    --bg-surface: #ffffff;
    --bg-surface-elevated: #e8f8f5;
    --bg-glass: rgba(255, 255, 255, 0.92);
    --border-glass: rgba(0, 161, 158, 0.18);
    
    --text-heading: #212529;
    --text-body: #333a42;
    --text-muted: #6c757d;
    --text-light: #9ea7ad;
    
    --primary: #00a19e;
    --primary-hover: #00817d;
    --primary-light: #e8f8f5;
    --primary-gradient: linear-gradient(135deg, #00a19e 0%, #0d6efd 100%);
    
    --accent-teal: #00a19e;
    --accent-teal-light: #d1ede7;
    --accent-purple: #7f77dd;
    --accent-purple-light: #eeedfe;
    --accent-amber: #d97706;
    
    --card-shadow: 0 10px 30px -5px rgba(0, 161, 158, 0.08), 0 4px 12px -2px rgba(0, 0, 0, 0.04);
    --hover-shadow: 0 20px 40px -10px rgba(0, 161, 158, 0.22), 0 8px 20px -4px rgba(0, 0, 0, 0.08);
    --glow-shadow: 0 0 25px rgba(0, 161, 158, 0.25);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-heading: 'Prompt', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Sarabun', 'Prompt', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

[data-theme="dark"] {
    /* Color Palette - Dark Mode */
    --bg-main: #090d16;
    --bg-surface: #111827;
    --bg-surface-elevated: #1f2937;
    --bg-glass: rgba(17, 24, 39, 0.88);
    --border-glass: rgba(0, 161, 158, 0.25);
    
    --text-heading: #f8fafc;
    --text-body: #cbd5e1;
    --text-muted: #94a3b8;
    --text-light: #64748b;
    
    --primary: #2dd4bf;
    --primary-hover: #14b8a6;
    --primary-light: rgba(45, 212, 191, 0.14);
    --primary-gradient: linear-gradient(135deg, #00a19e 0%, #38bdf8 100%);
    
    --accent-teal: #2dd4bf;
    --accent-teal-light: rgba(45, 212, 191, 0.15);
    --accent-purple: #a855f7;
    --accent-purple-light: rgba(168, 85, 247, 0.15);
    --accent-amber: #fbbf24;
    
    --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.35);
    --hover-shadow: 0 20px 40px -10px rgba(45, 212, 191, 0.22);
    --glow-shadow: 0 0 30px rgba(45, 212, 191, 0.3);
}

/* Animated Cosmic Shooting Stars Canvas */
#shooting-stars-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 0;
    display: block;
}

/* ==========================================================================
   GLOBAL BASE STYLES
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-main);
    background-image: 
        radial-gradient(circle at 15% 20%, rgba(56, 189, 248, 0.06) 0%, transparent 45%),
        radial-gradient(circle at 85% 60%, rgba(168, 85, 247, 0.06) 0%, transparent 45%),
        radial-gradient(circle at 50% 90%, rgba(45, 212, 191, 0.05) 0%, transparent 50%);
    background-attachment: fixed;
    color: var(--text-body);
    line-height: 1.65;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
    position: relative;
}

button, input, select, textarea {
    font-family: var(--font-body);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-heading);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-hover);
}

.container {
    width: min(1320px, 94%);
    margin: 0 auto;
}

/* ==========================================================================
   NAVBAR (STICKY GLASS)
   ========================================================================== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-glass);
    transition: var(--transition);
    padding: 12px 0;
}

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

.logo-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-brand img {
    width: 42px;
    height: 42px;
    filter: drop-shadow(0 2px 8px rgba(2, 132, 199, 0.3));
    transition: transform 0.4s ease;
}

.logo-brand:hover img {
    transform: rotate(10deg) scale(1.05);
}

.logo-text h2 {
    font-family: 'Prompt', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-heading);
    letter-spacing: -0.02em;
    line-height: 1.2;
    white-space: nowrap;
}

.logo-text span {
    font-family: 'Inter', 'Prompt', sans-serif;
    font-size: 0.72rem;
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    display: block;
    white-space: nowrap;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

img {
    image-rendering: -webkit-optimize-contrast;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 3px;
    list-style: none;
}

.nav-link {
    padding: 6px 9px;
    border-radius: var(--radius-full);
    color: var(--text-body);
    font-family: 'Prompt', sans-serif;
    font-weight: 500;
    font-size: 0.84rem;
    white-space: nowrap;
    line-height: 1.2;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link i {
    font-size: 0.9rem;
    opacity: 0.75;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: #ffffff;
    background: var(--primary-gradient);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 161, 158, 0.25);
}

.nav-link:hover i, .nav-link.active i {
    opacity: 1;
    color: #ffffff;
    transform: translateY(-1px);
}

/* Quick Search & Theme Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-glass);
    background: var(--bg-surface);
    color: var(--text-heading);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--card-shadow);
}

.btn-icon:hover {
    background: var(--primary-light);
    color: var(--primary);
    transform: translateY(-2px);
    border-color: var(--primary);
}

.search-trigger-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-glass);
    background: var(--bg-surface);
    color: var(--text-muted);
    font-size: 0.88rem;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
}

.search-trigger-btn kbd {
    background: var(--bg-surface-elevated);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-heading);
    border: 1px solid var(--border-glass);
}

.search-trigger-btn:hover {
    border-color: var(--primary);
    color: var(--text-heading);
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.15);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-heading);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==========================================================================
   HERO SECTION (CYBER GLASS)
   ========================================================================== */
.hero {
    position: relative;
    padding: 80px 0 100px;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
    pointer-events: none;
    z-index: 0;
}

.hero-bg-glow.glow-1 {
    top: -100px;
    left: -100px;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
}

.hero-bg-glow.glow-2 {
    bottom: -150px;
    right: -100px;
    background: radial-gradient(circle, var(--accent-purple) 0%, transparent 70%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.badge-pulse {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.88rem;
    font-weight: 600;
    border: 1px solid rgba(56, 189, 248, 0.3);
    margin-bottom: 24px;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 10px var(--primary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(2, 132, 199, 0.7); }
    70% { transform: scale(1.1); box-shadow: 0 0 0 10px rgba(2, 132, 199, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(2, 132, 199, 0); }
}

.hero-title {
    font-size: clamp(2.4rem, 4.5vw, 3.6rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    color: var(--text-heading);
    letter-spacing: -0.03em;
}

.hero-title .gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-teal) 50%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-sub {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 600px;
    line-height: 1.7;
}

.hero-ctas {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.98rem;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #0369a1 100%);
    color: #ffffff;
    box-shadow: 0 8px 20px -4px rgba(2, 132, 199, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px -4px rgba(2, 132, 199, 0.5);
    color: #ffffff;
}

.btn-outline {
    background: var(--bg-surface);
    color: var(--text-heading);
    border: 1px solid var(--border-glass);
    box-shadow: var(--card-shadow);
}

.btn-outline:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--border-glass);
}

.stat-item h4 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
    font-family: var(--font-heading);
}

.stat-item p {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* Hero Card Right Side */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.cyber-card {
    position: relative;
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1 / 1;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--card-shadow);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-12px) rotate(1deg); }
}

.hero-logo-img {
    width: 160px;
    height: 160px;
    object-fit: contain;
    filter: drop-shadow(0 10px 20px rgba(2, 132, 199, 0.3));
    margin-bottom: 20px;
}

.cyber-badge {
    position: absolute;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    border: 1px solid var(--border-glass);
    box-shadow: var(--card-shadow);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-heading);
    animation: floatBadge 4s ease-in-out infinite alternate;
}

.cyber-badge i {
    font-size: 1.1rem;
    color: var(--primary);
}

.cyber-badge.b-1 { top: 20px; left: -20px; animation-delay: 0s; }
.cyber-badge.b-2 { bottom: 40px; right: -20px; animation-delay: 1.5s; }
.cyber-badge.b-3 { bottom: -20px; left: 30px; animation-delay: 3s; }

@keyframes floatBadge {
    0% { transform: translateY(0px); }
    100% { transform: translateY(-8px); }
}

/* ==========================================================================
   SECTIONS & LAYOUT UTILITIES
   ========================================================================== */
.section {
    padding: 90px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 50px;
}

.section-subtitle {
    font-size: 0.88rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--primary);
    margin-bottom: 8px;
    display: block;
}

.section-title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    margin-bottom: 14px;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* ==========================================================================
   INTERACTIVE SYSTEM 1: COURSE EXPLORER & CATEGORIES
   ========================================================================== */
.explorer-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.search-bar {
    position: relative;
    flex: 1;
    min-width: 280px;
}

.search-bar input {
    width: 100%;
    padding: 12px 18px 12px 46px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-glass);
    background: var(--bg-surface);
    color: var(--text-heading);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
    box-shadow: var(--card-shadow);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--glow-shadow);
}

.search-bar i {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.category-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.cat-btn {
    padding: 8px 16px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-glass);
    background: var(--bg-surface);
    color: var(--text-muted);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.cat-btn:hover, .cat-btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 24px;
}

.course-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    cursor: pointer;
}

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--hover-shadow);
    border-color: rgba(56, 189, 248, 0.4);
}

.course-icon-wrapper {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 16px;
    transition: var(--transition);
}

.course-card:hover .course-icon-wrapper {
    background: var(--primary);
    color: #ffffff;
    transform: scale(1.08);
}

.course-code {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-teal);
    letter-spacing: 0.05em;
    margin-bottom: 4px;
    display: block;
}

.course-card h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
    color: var(--text-heading);
}

.course-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
    flex-grow: 1;
    margin-bottom: 16px;
}

.course-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 14px;
    border-top: 1px solid var(--border-glass);
}

.pill-badge {
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--bg-surface-elevated);
    color: var(--text-muted);
}

.lab-badge {
    background: var(--accent-teal-light);
    color: var(--accent-teal);
}

/* ==========================================================================
   INTERACTIVE SYSTEM 2: CREDIT & GPA TRACKER CALCULATOR
   ========================================================================== */
.tracker-card {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--card-shadow);
    margin-top: 30px;
}

.tracker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.progress-container {
    margin-bottom: 30px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.95rem;
}

.progress-bar-bg {
    width: 100%;
    height: 12px;
    border-radius: var(--radius-full);
    background: var(--bg-surface-elevated);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--accent-teal) 100%);
    border-radius: var(--radius-full);
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.year-checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.checkbox-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.checkbox-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.checkbox-card input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
    cursor: pointer;
}

.checkbox-card .sub-info h5 {
    font-size: 0.95rem;
    margin-bottom: 2px;
}

.checkbox-card .sub-info span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ==========================================================================
   INTERACTIVE SYSTEM 3: CAPSTONE PROJECT GALLERY
   ========================================================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

.project-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--hover-shadow);
}

.project-banner {
    height: 180px;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-banner img {
    transform: scale(1.08);
}

.project-banner i {
    font-size: 4rem;
    color: rgba(56, 189, 248, 0.3);
    transition: var(--transition);
}

.project-card:hover .project-banner i {
    transform: scale(1.15) rotate(-5deg);
    color: var(--primary);
}

.project-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.tech-tag {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    background: var(--primary-light);
    color: var(--primary);
}

.project-body h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.project-body p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    flex-grow: 1;
}

.project-author {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-light);
    padding-top: 14px;
    border-top: 1px solid var(--border-glass);
}

/* ==========================================================================
   FACULTY DIRECTORY
   ========================================================================== */
.teachers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 30px;
}

.teacher-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 32px 20px 24px;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    position: relative;
    margin-top: 40px;
}

.teacher-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--hover-shadow);
    border-color: var(--primary);
}

.avatar-wrapper {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-teal) 100%);
    color: #ffffff;
    font-size: 2.2rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: -95px auto 16px;
    box-shadow: 0 12px 30px rgba(2, 132, 199, 0.35);
    border: 5px solid var(--bg-surface);
    position: relative;
    overflow: hidden;
}

.avatar-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    border-radius: 50%;
}

.avatar-badge {
    position: absolute;
    bottom: -2px;
    right: -2px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent-teal);
    color: #fff;
}

/* ==========================================================================
   PROJECT LIVE DEMO MODAL & INTERACTIVE SIMULATORS
   ========================================================================== */
.project-card {
    cursor: pointer;
}

.project-card .btn-demo {
    margin-top: 14px;
    width: 100%;
    justify-content: center;
    font-size: 0.88rem;
    padding: 8px 16px;
    border-radius: var(--radius-full);
}

.demo-modal-dialog {
    width: min(850px, 95%);
    max-height: 92vh;
}

.ai-demo-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    background: var(--bg-surface-elevated);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--border-glass);
    margin-top: 16px;
}

.sample-img-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 10px;
}

.sample-img-btn {
    background: var(--bg-surface);
    border: 2px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 12px 8px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.82rem;
    color: var(--text-heading);
    font-weight: 600;
}

.sample-img-btn:hover, .sample-img-btn.active {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
}

.ai-result-box {
    background: var(--bg-surface);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Mobile App Simulator Frame */
.mobile-frame-container {
    max-width: 340px;
    margin: 16px auto 0;
    background: #0f172a;
    border: 10px solid #1e293b;
    border-radius: 36px;
    padding: 16px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    color: #ffffff;
}

.mobile-header {
    text-align: center;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 14px;
}

.mobile-place-card {
    background: rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 12px;
    margin-bottom: 10px;
    display: flex;
    gap: 10px;
    align-items: center;
}

/* Cloud Dashboard Simulator */
.dashboard-sim-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin: 16px 0;
}

.dash-stat-card {
    background: var(--bg-surface-elevated);
    border-radius: var(--radius-md);
    padding: 14px;
    text-align: center;
    border: 1px solid var(--border-glass);
}

.dash-stat-card h4 {
    font-size: 1.3rem;
    color: var(--primary);
}

.dash-stat-card span {
    font-size: 0.78rem;
    color: var(--text-muted);
}
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--bg-surface);
}

.teacher-name {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.teacher-role {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.teacher-tags {
    display: flex;
    justify-content: center;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.tag-pill {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

/* ==========================================================================
   FAQ & ACCORDION SYSTEM
   ========================================================================== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background: var(--bg-surface);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    background: transparent;
    border: none;
    text-align: left;
    font-family: inherit;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
}

.faq-question i {
    color: var(--primary);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out, padding 0.4s ease-out;
    padding: 0 24px;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

.faq-item.active .faq-answer {
    padding: 0 24px 20px;
    max-height: 300px;
}

/* ==========================================================================
   CONTACT FORM & TOAST
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-card-box {
    background: var(--bg-surface);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--card-shadow);
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-info-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-heading);
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-glass);
    background: var(--bg-surface-elevated);
    color: var(--text-heading);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--glow-shadow);
    background: var(--bg-surface);
}

/* Toast Container */
.toast-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    color: var(--text-heading);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border-left: 5px solid var(--primary);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideInRight 0.4s ease;
}

.toast.success { border-left-color: var(--accent-teal); }
.toast i { font-size: 1.2rem; color: var(--accent-teal); }

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ==========================================================================
   MODALS (PROFILE & GLOBAL SEARCH)
   ========================================================================== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.open {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--bg-surface);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    width: min(650px, 100%);
    max-height: 90vh;
    overflow-y: auto;
    padding: 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
    position: relative;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal-overlay.open .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-glass);
    background: var(--bg-surface-elevated);
    color: var(--text-heading);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: #ef4444;
    color: #ffffff;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-glass);
    padding: 50px 0 30px;
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 12px;
    max-width: 380px;
}

.footer-col h4 {
    font-size: 1.05rem;
    margin-bottom: 18px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.92rem;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-glass);
    text-align: center;
    color: var(--text-light);
    font-size: 0.88rem;
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--primary);
    color: #ffffff;
    border: none;
    box-shadow: 0 8px 20px rgba(2, 132, 199, 0.4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    z-index: 90;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:hover {
    transform: translateY(-4px);
    background: var(--primary-hover);
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 992px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero-sub { margin: 0 auto 32px; }
    .hero-ctas { justify-content: center; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .cyber-card { margin: 0 auto; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 66px;
        left: 0;
        right: 0;
        background: var(--bg-surface);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-glass);
        box-shadow: 0 20px 40px rgba(0,0,0,0.15);
        display: none;
    }
    
    .nav-menu.open { display: flex; }
    .menu-toggle { display: flex; }
    .search-trigger-btn span { display: none; }
}