/* ===== CSS Variables ===== */
:root {
    /* Dark Theme Colors */
    --bg-primary: #0a0e27;
    --bg-secondary: #16213e;
    --bg-tertiary: #1a1a2e;

    /* Neon/Cyber Colors */
    --neon-blue: #00d9ff;
    --neon-purple: #b537f2;
    --neon-pink: #ff006e;
    --neon-green: #00ff88;
    --neon-yellow: #ffdd00;

    /* Text Colors */
    --text-primary: #e4e4e4;
    --text-secondary: #a8a8a8;
    --text-muted: #6b7280;

    /* Accent Colors */
    --accent-primary: #00d9ff;
    --accent-secondary: #b537f2;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-cyber: linear-gradient(135deg, #00d9ff 0%, #b537f2 100%);
    --gradient-warm: linear-gradient(135deg, #ff006e 0%, #ffdd00 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-mono: 'Courier New', monospace;

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

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

::selection {
    background-color: var(--neon-blue);
    color: var(--bg-primary);
}

/* ===== Animated Background ===== */
.animated-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

#particles-canvas {
    width: 100%;
    height: 100%;
}

.gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(0, 217, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(181, 55, 242, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 40% 90%, rgba(255, 0, 110, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--spacing-sm) 0;
    background: rgba(10, 14, 39, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 217, 255, 0.1);
    z-index: 1000;
    transition: var(--transition-normal);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.logo-bracket {
    color: var(--neon-blue);
}

.logo-text {
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.logo:hover .logo-text {
    color: var(--neon-blue);
    text-shadow: 0 0 20px var(--neon-blue);
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--neon-blue);
    border-radius: 3px;
    transition: var(--transition-fast);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-cyber);
    transition: var(--transition-normal);
}

.nav-link:hover {
    color: var(--neon-blue);
}

.nav-link:hover::after {
    width: 100%;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) 0;
    position: relative;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-text {
    animation: fadeInUp 1s ease;
}

.glitch-wrapper {
    margin-bottom: var(--spacing-sm);
}

.name {
    font-size: 4rem;
    font-weight: 800;
    background: var(--gradient-cyber);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0;
    position: relative;
}

.glitch {
    animation: glitch 3s infinite;
}

@keyframes glitch {
    0%, 90%, 100% {
        transform: translate(0);
    }
    92% {
        transform: translate(-2px, 2px);
    }
    94% {
        transform: translate(2px, -2px);
    }
    96% {
        transform: translate(-2px, -2px);
    }
    98% {
        transform: translate(2px, 2px);
    }
}

.typing-container {
    margin: var(--spacing-sm) 0;
}

.title {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.cursor {
    animation: blink 1s infinite;
    color: var(--neon-blue);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.affiliation {
    font-size: 1rem;
    color: var(--text-muted);
    margin: var(--spacing-sm) 0;
}

.research-tags {
    display: flex;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    flex-wrap: wrap;
}

.tag-glow {
    padding: 0.5rem 1rem;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid var(--neon-blue);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--neon-blue);
    transition: var(--transition-fast);
    cursor: default;
}

.tag-glow:hover {
    background: rgba(0, 217, 255, 0.2);
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.5);
    transform: translateY(-2px);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-icon {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--neon-blue);
    border-radius: 50%;
    color: var(--neon-blue);
    text-decoration: none;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.social-icon::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--neon-blue);
    transform: scale(0);
    transition: var(--transition-fast);
    border-radius: 50%;
    z-index: -1;
}

.social-icon:hover {
    color: var(--bg-primary);
    box-shadow: 0 0 20px var(--neon-blue);
    transform: translateY(-3px);
}

.social-icon:hover::before {
    transform: scale(1);
}

/* Hero Image */
.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-frame {
    position: relative;
    width: 350px;
    height: 350px;
    animation: fadeInRight 1s ease;
}

.image-border {
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border: 2px solid var(--neon-blue);
    border-radius: 20px;
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 75% 35%;
    border-radius: 15px;
    position: relative;
    z-index: 1;
}

.image-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.3), transparent 70%);
    z-index: 0;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
}

.floating-elements {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
}

.float-icon {
    position: absolute;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 217, 255, 0.1);
    border: 2px solid var(--neon-blue);
    border-radius: 15px;
    color: var(--neon-blue);
    font-size: 1.5rem;
    animation: float 3s ease-in-out infinite;
    animation-delay: var(--delay);
    transform: translate(var(--x), var(--y));
}

@keyframes float {
    0%, 100% { transform: translate(var(--x), var(--y)) translateY(0); }
    50% { transform: translate(var(--x), var(--y)) translateY(-20px); }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid var(--neon-blue);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--neon-blue);
    border-radius: 2px;
    animation: scroll-down 1.5s infinite;
}

@keyframes scroll-down {
    0% { top: 8px; opacity: 1; }
    100% { top: 20px; opacity: 0; }
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

/* ===== Section Styles ===== */
section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    position: relative;
}

.title-number {
    font-size: 1.5rem;
    color: var(--neon-blue);
    font-family: var(--font-mono);
}

.title-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, var(--neon-blue), transparent);
    margin-left: var(--spacing-sm);
}

/* Section Reveal Animation */
.section-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.section-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== About Section ===== */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.about-text p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    line-height: 1.8;
}

.highlight {
    color: var(--neon-blue);
    font-weight: 600;
}

.school-logo {
    height: 24px;
    width: 24px;
    object-fit: contain;
    vertical-align: middle;
    margin-left: 5px;
    border-radius: 4px;
    opacity: 0.9;
    transition: var(--transition-fast);
}

.school-logo:hover {
    transform: scale(1.2);
    opacity: 1;
    filter: drop-shadow(0 0 5px var(--neon-blue));
}

.school-logo-lg {
    height: 42px;
    width: auto;
}

.nowrap {
    white-space: nowrap;
    display: inline;
}

.advisor-link {
    color: var(--neon-purple);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
    position: relative;
}

.advisor-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--neon-purple);
    transition: var(--transition-fast);
}

.advisor-link:hover {
    color: var(--neon-blue);
    text-shadow: 0 0 10px var(--neon-blue);
}

.advisor-link:hover::after {
    width: 100%;
    background: var(--neon-blue);
}

.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

.fade-in:nth-child(2) { animation-delay: 0.2s; }
.fade-in:nth-child(3) { animation-delay: 0.4s; }

@keyframes fadeIn {
    to { opacity: 1; }
}

/* Video Generation Animation */
.about-animation {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(22, 33, 62, 0.5);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: 12px;
    min-width: 280px;
    max-width: 320px;
}

.video-gen-demo {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.animation-title {
    font-size: 0.85rem;
    color: var(--neon-blue);
    margin-bottom: 6px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-align: center;
}

/* Generation Row */
.gen-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    border-radius: 8px;
    background: rgba(10, 14, 39, 0.6);
}

.slow-gen {
    border: 1px solid rgba(255, 100, 100, 0.25);
}

.fast-gen {
    border: 1px solid rgba(0, 255, 136, 0.25);
}

.gen-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    min-width: 45px;
    color: var(--text-muted);
    font-size: 0.65rem;
}

.gen-label i {
    font-size: 0.9rem;
    color: #ff6b6b;
}

.fast-label i {
    color: var(--neon-green);
    animation: boltPulse 0.8s ease-in-out infinite;
}

@keyframes boltPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.15); opacity: 0.8; }
}

/* Video Filmstrip Style Frames */
.video-filmstrip {
    display: flex;
    gap: 3px;
    flex: 1;
    background: linear-gradient(180deg, #0a0a0f, #111118);
    padding: 5px 10px;
    border-radius: 3px;
    position: relative;
    max-width: 200px;
}

/* Filmstrip sprocket holes */
.video-filmstrip::before,
.video-filmstrip::after {
    content: '';
    position: absolute;
    top: 2px;
    bottom: 2px;
    width: 4px;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 3px,
        #1a1a2e 3px,
        #1a1a2e 6px
    );
    border-radius: 1px;
}

.video-filmstrip::before { left: 2px; }
.video-filmstrip::after { right: 2px; }

.film-frame {
    width: 38px;
    height: 28px;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    border: 1px solid;
    border-radius: 2px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.frame-img {
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg,
        rgba(0, 217, 255, 0.15) 0%,
        rgba(181, 55, 242, 0.1) 50%,
        rgba(0, 217, 255, 0.15) 100%);
    background-size: 200% 200%;
    animation: frameGradient 2s ease infinite;
}

@keyframes frameGradient {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Slow frames - sluggish appearance */
.slow-frames .film-frame {
    border-color: rgba(255, 100, 100, 0.3);
    opacity: 0;
    transform: scale(0.9);
    animation: slowFrameAppear 6s ease-in-out infinite;
}

.slow-frames .ff-1 { animation-delay: 0s; }
.slow-frames .ff-2 { animation-delay: 1.5s; }
.slow-frames .ff-3 { animation-delay: 3s; }
.slow-frames .ff-4 { animation-delay: 4.5s; }

@keyframes slowFrameAppear {
    0%, 20% {
        opacity: 0;
        transform: scale(0.85);
        border-color: rgba(255, 100, 100, 0.2);
    }
    30% {
        opacity: 0.6;
        transform: scale(0.95);
        border-color: rgba(255, 100, 100, 0.4);
    }
    40%, 100% {
        opacity: 1;
        transform: scale(1);
        border-color: rgba(255, 100, 100, 0.5);
    }
}

.slow-frames .frame-img {
    background: linear-gradient(135deg,
        rgba(255, 100, 100, 0.12) 0%,
        rgba(200, 80, 80, 0.08) 100%);
}

/* Fast frames - rapid appearance with glow */
.fast-frames .film-frame {
    border-color: rgba(0, 255, 136, 0.4);
    opacity: 0;
    transform: scale(0.95);
    animation: fastFrameAppear 2.5s ease-out infinite;
}

.fast-frames .ff-fast-1 { animation-delay: 0s; }
.fast-frames .ff-fast-2 { animation-delay: 0.12s; }
.fast-frames .ff-fast-3 { animation-delay: 0.24s; }
.fast-frames .ff-fast-4 { animation-delay: 0.36s; }

@keyframes fastFrameAppear {
    0% {
        opacity: 0;
        transform: scale(0.9);
    }
    10% {
        opacity: 1;
        transform: scale(1.02);
    }
    15%, 100% {
        opacity: 1;
        transform: scale(1);
        border-color: var(--neon-green);
        box-shadow: 0 0 6px rgba(0, 255, 136, 0.4), inset 0 0 4px rgba(0, 255, 136, 0.1);
    }
}

.fast-frames .frame-img {
    background: linear-gradient(135deg,
        rgba(0, 255, 136, 0.18) 0%,
        rgba(0, 217, 255, 0.12) 100%);
    animation: fastFrameGlow 1.2s ease-in-out infinite;
}

@keyframes fastFrameGlow {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

.frame-number {
    position: absolute;
    bottom: 1px;
    right: 3px;
    font-size: 0.5rem;
    color: rgba(255, 255, 255, 0.5);
    font-family: var(--font-mono);
}

/* Speed Divider */
.speed-divider {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 8px 0;
}

.divider-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--neon-purple), transparent);
}

.speed-boost {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: rgba(181, 55, 242, 0.2);
    border: 1px solid var(--neon-purple);
    border-radius: 20px;
    color: var(--neon-purple);
    font-size: 0.8rem;
    font-weight: 700;
    animation: boostGlow 2s ease-in-out infinite;
}

.speed-boost i {
    color: var(--neon-yellow);
    animation: boltFlash 0.5s ease-in-out infinite;
}

@keyframes boostGlow {
    0%, 100% { box-shadow: 0 0 5px rgba(181, 55, 242, 0.3); }
    50% { box-shadow: 0 0 15px rgba(181, 55, 242, 0.6); }
}

@keyframes boltFlash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ===== Publications Section ===== */
.publications-filter {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.6rem 1.5rem;
    background: transparent;
    border: 2px solid rgba(0, 217, 255, 0.3);
    border-radius: 25px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 0.9rem;
}

.filter-btn:hover {
    border-color: var(--neon-blue);
    color: var(--neon-blue);
}

.filter-btn.active {
    background: var(--neon-blue);
    border-color: var(--neon-blue);
    color: var(--bg-primary);
    font-weight: 600;
}

.publications-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.publication-item {
    display: grid;
    grid-template-columns: auto 80px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(22, 33, 62, 0.3);
    border: 1px solid rgba(0, 217, 255, 0.1);
    border-radius: 10px;
    transition: var(--transition-fast);
    position: relative;
}

.publication-item:hover {
    background: rgba(22, 33, 62, 0.5);
    border-color: var(--neon-blue);
    transform: translateX(10px);
}

.pub-indicator {
    width: 4px;
    background: var(--gradient-cyber);
    border-radius: 2px;
}

.pub-year {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--neon-blue);
    font-family: var(--font-mono);
}

.pub-title {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.pub-authors {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.pub-venue {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.venue-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 5px;
    font-size: 0.85rem;
    font-weight: 600;
}

.venue-conference {
    background: rgba(0, 217, 255, 0.2);
    color: var(--neon-blue);
}

.venue-journal {
    background: rgba(181, 55, 242, 0.2);
    color: var(--neon-purple);
}

.venue-preprint {
    background: rgba(255, 221, 0, 0.2);
    color: var(--neon-yellow);
}

.pub-status {
    color: var(--neon-green);
    font-size: 0.85rem;
}

.pub-description {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0.5rem 0;
}

.pub-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: 0.5rem;
    flex-wrap: wrap;
}

.pub-link {
    padding: 0.4rem 1rem;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid var(--neon-blue);
    border-radius: 20px;
    color: var(--neon-blue);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.pub-link:hover {
    background: var(--neon-blue);
    color: var(--bg-primary);
    transform: translateY(-2px);
}

.pub-link-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    border-style: dashed;
}

/* ===== Projects Section ===== */
.projects-showcase {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.project-featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(22, 33, 62, 0.3);
    border: 2px solid rgba(0, 217, 255, 0.2);
    border-radius: 20px;
    align-items: center;
}

.project-visual {
    position: relative;
}

.video-container {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    background: var(--bg-secondary);
}

.project-video {
    width: 100%;
    display: block;
    border-radius: 15px;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: var(--transition-normal);
}

.video-container:hover .video-overlay {
    opacity: 0;
}

.play-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-cyber);
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.play-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 30px rgba(0, 217, 255, 0.5);
}

/* Video Progress Bar */
.video-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 10px 15px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 1;
    transition: opacity 0.3s ease;
    z-index: 10;
}

.video-container.playing .video-controls,
.video-container:hover .video-controls {
    opacity: 1;
}

.progress-bar {
    flex: 1;
    height: 5px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.progress-bar:hover {
    height: 8px;
}

.progress-filled {
    height: 100%;
    background: var(--gradient-cyber);
    border-radius: 3px;
    width: 0%;
    transition: width 0.1s linear;
    position: relative;
}

.progress-filled::after {
    content: '';
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: var(--neon-blue);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.2s ease;
    box-shadow: 0 0 10px var(--neon-blue);
}

.progress-bar:hover .progress-filled::after {
    opacity: 1;
}

.video-time {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.75rem;
    font-family: var(--font-mono);
    min-width: 85px;
    text-align: right;
}

/* Video Caption */
.video-caption {
    margin-top: 12px;
    padding: 12px 16px;
    background: rgba(22, 33, 62, 0.6);
    border-left: 3px solid var(--neon-blue);
    border-radius: 0 8px 8px 0;
}

.video-caption p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
    font-style: italic;
}

.video-caption i {
    color: var(--neon-blue);
    opacity: 0.6;
    font-size: 0.7rem;
    margin: 0 4px;
}

.project-label {
    color: var(--neon-blue);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.project-description p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

.project-features {
    list-style: none;
    margin: var(--spacing-sm) 0;
}

.project-features li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.project-features i {
    color: var(--neon-green);
}

.project-tech {
    display: flex;
    gap: 0.5rem;
    margin: var(--spacing-sm) 0;
    flex-wrap: wrap;
}

.tech-tag {
    padding: 0.4rem 1rem;
    background: rgba(181, 55, 242, 0.1);
    border: 1px solid var(--neon-purple);
    border-radius: 20px;
    color: var(--neon-purple);
    font-size: 0.85rem;
}

.project-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.btn {
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--gradient-cyber);
    color: white;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--neon-blue);
    border: 2px solid var(--neon-blue);
}

.btn-secondary:hover {
    background: var(--neon-blue);
    color: var(--bg-primary);
    transform: translateY(-3px);
}

.btn-disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Project Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.project-card {
    background: rgba(22, 33, 62, 0.5);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: 15px;
    overflow: hidden;
    position: relative;
    transition: var(--transition-normal);
}

.card-hover {
    cursor: pointer;
}

.card-hover:hover {
    transform: translateY(-10px);
    border-color: var(--neon-blue);
    box-shadow: 0 10px 40px rgba(0, 217, 255, 0.3);
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.1), transparent 50%);
    opacity: 0;
    transition: var(--transition-normal);
    pointer-events: none;
}

.card-hover:hover .card-glow {
    opacity: 1;
}

.project-image {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--bg-secondary);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition-slow);
    padding: 10px;
    box-sizing: border-box;
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 217, 255, 0.2);
    border-radius: 50%;
    color: var(--neon-blue);
    font-size: 1.5rem;
    opacity: 0;
    transition: var(--transition-normal);
}

.project-card:hover .project-overlay-icon {
    opacity: 1;
}

.project-info {
    padding: var(--spacing-sm);
}

.project-info h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.project-meta {
    display: flex;
    gap: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.project-link-btn {
    color: var(--neon-blue);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.project-link-btn:hover {
    gap: 1rem;
}

/* ===== Contact Section ===== */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.contact-card {
    padding: var(--spacing-md);
    background: rgba(22, 33, 62, 0.3);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: 15px;
    transition: var(--transition-fast);
}

.contact-card:hover {
    border-color: var(--neon-blue);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.2);
}

.contact-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-cyber);
    border-radius: 15px;
    color: white;
    font-size: 1.5rem;
}

.contact-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-card p,
.contact-card a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.contact-card a:hover {
    color: var(--neon-blue);
}

/* ===== Footer ===== */
.footer {
    padding: var(--spacing-md) 0;
    border-top: 1px solid rgba(0, 217, 255, 0.1);
}

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

.footer-text p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links a {
    color: var(--neon-blue);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

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

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero-content,
    .about-content,
    .project-featured {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .name {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(10, 14, 39, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition-normal);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .projects-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .publication-item {
        grid-template-columns: auto 1fr;
    }

    .pub-year {
        grid-column: 2;
        grid-row: 1;
    }

    .pub-indicator {
        grid-row: 1 / 3;
    }

    .name {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .name {
        font-size: 2rem;
    }

    .image-frame {
        width: 250px;
        height: 250px;
    }

    .research-tags {
        flex-direction: column;
    }
}