/* ========================================
   CSS Variables & Root Styles
   ======================================== */
:root {
    /* Colors - Dark Mode */
    --color-primary: #e63946;
    --color-primary-dark: #c1121f;
    --color-primary-light: #ff6b6b;
    --color-primary-gradient: linear-gradient(135deg, #e63946 0%, #ff6b6b 50%, #c1121f 100%);
    --color-background: #0a0a0f;
    --color-background-alt: #12121a;
    --color-background-dark: #1a1a2e;
    --color-background-gradient: linear-gradient(135deg, #0a0a0f 0%, #1a1a2e 50%, #0d0d14 100%);
    --color-card-gradient: linear-gradient(145deg, #1a1a2e 0%, #12121a 100%);
    --color-text: #e4e4e7;
    --color-text-light: #a1a1aa;
    --color-text-muted: #71717a;
    --color-border: #27272a;
    --color-border-glow: rgba(230, 57, 70, 0.3);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 30px rgba(230, 57, 70, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-background-gradient);
    overflow-x: hidden;
    background-attachment: fixed;
}

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

a:hover {
    color: var(--color-primary);
    text-shadow: 0 0 10px var(--color-border-glow);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ========================================
   Layout Utilities
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #ffffff 0%, #e4e4e7 50%, #a1a1aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #c1121f, #e63946, #ff6b6b, #e63946, #c1121f);
    background-size: 200% 100%;
    margin: var(--spacing-sm) auto 0;
    border-radius: var(--radius-full);
    animation: gradientShift 3s linear infinite;
    box-shadow: 0 0 10px rgba(230, 57, 70, 0.5);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    font-size: var(--font-size-lg);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: linear-gradient(180deg, rgba(10, 10, 15, 0.98) 0%, rgba(18, 18, 26, 0.95) 100%);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: linear-gradient(135deg, #ff6b6b 0%, #e63946 50%, #c1121f 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 10px rgba(230, 57, 70, 0.5));
}

.logo:hover {
    filter: drop-shadow(0 0 20px rgba(230, 57, 70, 0.8));
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-links a {
    color: var(--color-text-light);
    font-weight: 500;
    font-size: var(--font-size-sm);
    position: relative;
    padding: var(--spacing-xs) 0;
    background: linear-gradient(90deg, transparent, rgba(230, 57, 70, 0.1), transparent);
    background-size: 200% 100%;
    background-position: -100% 0;
    transition: all var(--transition-base);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #c1121f, #e63946, #ff6b6b);
    transition: width var(--transition-base);
    box-shadow: 0 0 10px var(--color-primary);
}

.nav-links a:hover {
    color: var(--color-primary-light);
    background-position: 100% 0;
    text-shadow: 0 0 10px var(--color-border-glow);
}

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

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

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-fast);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(230, 57, 70, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(193, 18, 31, 0.1) 0%, transparent 50%),
        var(--color-background-gradient);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 2px,
            rgba(230, 57, 70, 0.02) 2px,
            rgba(230, 57, 70, 0.02) 4px
        );
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-greeting {
    font-size: var(--font-size-lg);
    background: linear-gradient(90deg, #e63946, #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    background: linear-gradient(135deg, #ffffff 0%, #e4e4e7 50%, #a1a1aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    filter: drop-shadow(0 0 30px rgba(230, 57, 70, 0.3));
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    background: linear-gradient(90deg, #e63946, #ff6b6b, #e63946);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-lg);
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    to { background-position: 200% center; }
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
    background: linear-gradient(180deg, rgba(255,255,255,0.1), transparent);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--color-primary);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #e63946 0%, #c1121f 100%);
    color: white;
    box-shadow: 
        0 4px 15px rgba(230, 57, 70, 0.4),
        0 0 30px rgba(230, 57, 70, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 8px 25px rgba(230, 57, 70, 0.5),
        0 0 40px rgba(230, 57, 70, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    color: white;
}

.btn-secondary {
    background: linear-gradient(135deg, rgba(230, 57, 70, 0.1), rgba(193, 18, 31, 0.1));
    color: var(--color-primary-light);
    border: 2px solid var(--color-primary);
    position: relative;
    overflow: hidden;
}

.btn-secondary::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, #e63946, #c1121f);
    transition: width var(--transition-base);
    z-index: -1;
}

.btn-secondary:hover {
    color: white;
    transform: translateY(-3px);
    border-color: transparent;
    box-shadow: 0 8px 25px rgba(230, 57, 70, 0.4);
}

.btn-secondary:hover::after {
    width: 100%;
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-container {
    position: relative;
    width: 300px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-image-wrapper {
    position: relative;
    width: 280px;
    height: 280px;
    z-index: 2;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid rgba(230, 57, 70, 0.5);
    box-shadow: 
        0 0 60px rgba(230, 57, 70, 0.4),
        0 0 100px rgba(230, 57, 70, 0.2),
        inset 0 0 40px rgba(230, 57, 70, 0.1);
    animation: profileFloat 6s ease-in-out infinite, profileGlow 3s ease-in-out infinite;
    transition: all var(--transition-base);
}

.profile-image:hover {
    border-color: rgba(230, 57, 70, 0.8);
    box-shadow: 
        0 0 80px rgba(230, 57, 70, 0.6),
        0 0 120px rgba(230, 57, 70, 0.3),
        inset 0 0 60px rgba(230, 57, 70, 0.2);
    transform: scale(1.02);
}

.profile-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(230, 57, 70, 0.3) 0%, transparent 70%);
    z-index: 1;
    animation: glowPulse 3s ease-in-out infinite;
}

@keyframes profileFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

@keyframes profileGlow {
    0%, 100% {
        filter: drop-shadow(0 0 20px rgba(230, 57, 70, 0.4));
    }
    50% {
        filter: drop-shadow(0 0 40px rgba(230, 57, 70, 0.6));
    }
}

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

.hero-shapes {
    position: absolute;
    width: 300px;
    height: 300px;
    z-index: 0;
}

.shape {
    position: absolute;
    border-radius: var(--radius-lg);
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #e63946 0%, #ff6b6b 50%, #c1121f 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.9;
    box-shadow: 
        0 0 60px rgba(230, 57, 70, 0.5),
        inset 0 0 40px rgba(255, 107, 107, 0.3);
    filter: blur(1px);
}

.shape-2 {
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, #2d3436 0%, #1a1a2e 50%, #0a0a0f 100%);
    top: 20%;
    left: 20%;
    animation-delay: -2s;
    opacity: 0.8;
    box-shadow: 
        0 0 40px rgba(230, 57, 70, 0.3),
        inset 0 0 30px rgba(230, 57, 70, 0.1);
    border: 1px solid var(--color-border-glow);
}

.shape-3 {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #ff6b6b 0%, #e63946 50%, #c1121f 100%);
    bottom: 20%;
    right: 20%;
    animation-delay: -4s;
    opacity: 0.7;
    box-shadow: 
        0 0 50px rgba(230, 57, 70, 0.6),
        inset 0 0 25px rgba(255, 255, 255, 0.2);
    filter: blur(0.5px);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

/* ========================================
   About Section
   ======================================== */
.about {
    background: 
        radial-gradient(ellipse at 50% 0%, rgba(230, 57, 70, 0.08) 0%, transparent 50%),
        var(--color-background-alt);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.about-card {
    background: var(--color-card-gradient);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #c1121f, #e63946, #ff6b6b, #e63946, #c1121f);
    background-size: 200% 100%;
    opacity: 0;
    transition: all var(--transition-base);
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 0 30px rgba(230, 57, 70, 0.2);
    border-color: var(--color-primary);
}

.about-card:hover::before {
    opacity: 1;
    animation: gradientShift 2s linear infinite;
}

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

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 0 10px rgba(230, 57, 70, 0.3));
    transition: transform var(--transition-base);
}

.about-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.about-card h3 {
    font-size: var(--font-size-xl);
    background: linear-gradient(135deg, #e63946, #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.about-card p {
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.about-card .small {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.interest-list {
    text-align: left;
    padding-left: var(--spacing-lg);
}

.interest-list li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.interest-list li::before {
    content: '•';
    color: var(--color-primary-light);
    font-weight: bold;
    position: absolute;
    left: 0;
    text-shadow: 0 0 5px var(--color-primary);
}

/* ========================================
   Research Section
   ======================================== */
.research {
    background: 
        radial-gradient(ellipse at 80% 0%, rgba(230, 57, 70, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 20% 100%, rgba(193, 18, 31, 0.08) 0%, transparent 50%),
        var(--color-background-alt);
}

.publications {
    max-width: 900px;
    margin: 0 auto;
}

.year-group {
    margin-bottom: var(--spacing-2xl);
}

.year-title {
    font-size: var(--font-size-2xl);
    background: linear-gradient(90deg, #c1121f, #e63946, #ff6b6b, #e63946);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid transparent;
    border-image: linear-gradient(90deg, #c1121f, #e63946, #ff6b6b) 1;
    animation: shimmer 3s linear infinite;
}

.publication-card {
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.8) 0%, rgba(18, 18, 26, 0.9) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

/* Publication cards with background images */
.publication-card.lediflow-bg {
    background-image: 
        linear-gradient(145deg, rgba(26, 26, 46, 0.75) 0%, rgba(18, 18, 26, 0.8) 100%),
        url('../res/lediflow.jpeg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: all var(--transition-base);
}

.publication-card.digitaf-bg {
    background-image: 
        linear-gradient(145deg, rgba(26, 26, 46, 0.75) 0%, rgba(18, 18, 26, 0.8) 100%),
        url('../res/digitaf.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: all var(--transition-base);
}

.publication-card.vkitti-bg {
    background-image: 
        linear-gradient(145deg, rgba(26, 26, 46, 0.75) 0%, rgba(18, 18, 26, 0.8) 100%),
        url('../res/vkitti.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: all var(--transition-base);
}

/* Hover effect - brighter background */
.publication-card.lediflow-bg:hover {
    background-image: 
        linear-gradient(145deg, rgba(26, 26, 46, 0.45) 0%, rgba(18, 18, 26, 0.5) 100%),
        url('../res/lediflow.jpeg');
}

.publication-card.digitaf-bg:hover {
    background-image: 
        linear-gradient(145deg, rgba(26, 26, 46, 0.45) 0%, rgba(18, 18, 26, 0.5) 100%),
        url('../res/digitaf.jpg');
}

.publication-card.vkitti-bg:hover {
    background-image: 
        linear-gradient(145deg, rgba(26, 26, 46, 0.45) 0%, rgba(18, 18, 26, 0.5) 100%),
        url('../res/vkitti.png');
}

/* Anonymization paper background */
.publication-card.anonymization-bg {
    background-image: 
        linear-gradient(145deg, rgba(26, 26, 46, 0.75) 0%, rgba(18, 18, 26, 0.8) 100%),
        url('https://arxiv.org/html/2410.08551v2/x1.png ');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: all var(--transition-base);
}

.publication-card.anonymization-bg:hover {
    background-image: 
        linear-gradient(145deg, rgba(26, 26, 46, 0.45) 0%, rgba(18, 18, 26, 0.5) 100%),
        url('https://arxiv.org/html/2410.08551v2/x1.png ');
}

.publication-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, #e63946, #ff6b6b, #c1121f);
    opacity: 0.5;
    transition: all var(--transition-base);
}

.publication-card:hover {
    transform: translateX(8px);
    box-shadow: 
        0 10px 30px rgba(0, 0, 0, 0.3),
        0 0 20px rgba(230, 57, 70, 0.15);
    border-color: var(--color-primary);
}

.publication-card:hover::before {
    opacity: 1;
    box-shadow: 0 0 15px var(--color-primary);
}

.pub-content h4 {
    font-size: var(--font-size-lg);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

.pub-venue {
    font-size: var(--font-size-sm);
    background: linear-gradient(90deg, #e63946, #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.pub-authors {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    opacity: 0.8;
}

.pub-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: linear-gradient(135deg, rgba(230, 57, 70, 0.15), rgba(193, 18, 31, 0.15));
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    border: 1px solid rgba(230, 57, 70, 0.3);
}

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

.pub-link:hover {
    background: linear-gradient(135deg, #e63946, #c1121f);
    color: white;
    box-shadow: 0 0 20px rgba(230, 57, 70, 0.4);
    transform: translateX(3px);
}

.research-meta {
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.6), rgba(18, 18, 26, 0.8));
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: 0 0 30px rgba(230, 57, 70, 0.1);
}

.research-meta p {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.research-meta a {
    color: var(--color-primary-light);
    text-shadow: 0 0 10px rgba(230, 57, 70, 0.5);
}

/* ========================================
   Projects Section
   ======================================== */
.projects {
    background: 
        radial-gradient(ellipse at 50% 100%, rgba(230, 57, 70, 0.1) 0%, transparent 50%),
        var(--color-background-alt);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.7) 0%, rgba(18, 18, 26, 0.85) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.project-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(230, 57, 70, 0.05) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 0 30px rgba(230, 57, 70, 0.15);
    border-color: var(--color-primary);
}

.project-card:hover::after {
    opacity: 1;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.project-stars,
.project-forks,
.project-github {
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: linear-gradient(135deg, rgba(230, 57, 70, 0.2), rgba(193, 18, 31, 0.1));
    border-radius: var(--radius-sm);
    color: var(--color-primary-light);
    border: 1px solid rgba(230, 57, 70, 0.3);
    box-shadow: 0 0 10px rgba(230, 57, 70, 0.2);
}

.project-card h3 {
    font-size: var(--font-size-xl);
    background: linear-gradient(135deg, #ff6b6b, #e63946);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.project-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
    opacity: 0.9;
}

.project-meta {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xs);
}

.project-meta span {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: linear-gradient(135deg, rgba(39, 39, 43, 0.8), rgba(26, 26, 46, 0.8));
    border-radius: var(--radius-sm);
    color: var(--color-text);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-primary-light);
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(230, 57, 70, 0.3);
    transition: all var(--transition-fast);
    position: relative;
    z-index: 1;
}

.project-link:hover {
    gap: var(--spacing-sm);
    color: #ff8787;
    text-shadow: 0 0 10px rgba(230, 57, 70, 0.5);
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    background: 
        radial-gradient(ellipse at 30% 50%, rgba(230, 57, 70, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(193, 18, 31, 0.06) 0%, transparent 50%),
        var(--color-background-alt);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.7) 0%, rgba(18, 18, 26, 0.85) 100%);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, #e63946, #ff6b6b, #e63946, transparent);
    transition: all var(--transition-base);
}

.contact-card:hover::before {
    width: 80%;
}

.contact-card:hover {
    transform: translateY(-8px);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 0 30px rgba(230, 57, 70, 0.2);
    border-color: var(--color-primary);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 0 15px rgba(230, 57, 70, 0.4));
    transition: all var(--transition-base);
    animation: iconGlow 3s ease-in-out infinite;
}

@keyframes iconGlow {
    0%, 100% { filter: drop-shadow(0 0 15px rgba(230, 57, 70, 0.4)); }
    50% { filter: drop-shadow(0 0 25px rgba(230, 57, 70, 0.6)); }
}

.contact-card:hover .contact-icon {
    transform: scale(1.1);
}

.contact-card h3 {
    font-size: var(--font-size-xl);
    background: linear-gradient(135deg, #e63946, #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.contact-link {
    display: block;
    color: var(--color-primary-light);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    transition: all var(--transition-fast);
    position: relative;
}

.contact-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, #e63946, transparent);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

.contact-link:hover {
    color: #ff8787;
    text-shadow: 0 0 10px rgba(230, 57, 70, 0.5);
    transform: scale(1.05);
}

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

.contact-phone {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* ========================================
   Quick Links Section
   ======================================== */
.quick-links {
    background: 
        radial-gradient(ellipse at 50% 0%, rgba(230, 57, 70, 0.06) 0%, transparent 50%),
        var(--color-background-alt);
}

.quick-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.quick-link-card {
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.7) 0%, rgba(18, 18, 26, 0.85) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: all var(--transition-base);
    text-decoration: none;
    color: var(--color-text);
}

.quick-link-card:hover {
    transform: translateY(-5px);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 0 30px rgba(230, 57, 70, 0.2);
    border-color: var(--color-primary);
}

.quick-link-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 0 10px rgba(230, 57, 70, 0.3));
}

.quick-link-card h3 {
    font-size: var(--font-size-lg);
    background: linear-gradient(135deg, #e63946, #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.quick-link-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    opacity: 0.8;
}

.project-org {
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: linear-gradient(135deg, rgba(100, 100, 255, 0.2), rgba(50, 50, 150, 0.2));
    border-radius: var(--radius-sm);
    color: #818cf8;
    border: 1px solid rgba(100, 100, 255, 0.3);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: linear-gradient(180deg, var(--color-background-alt) 0%, #0a0a0f 100%);
    color: var(--color-text-muted);
    padding: var(--spacing-2xl) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(230, 57, 70, 0.5), transparent);
}

.footer p {
    margin-bottom: var(--spacing-xs);
}

.footer-note {
    font-size: var(--font-size-sm);
    opacity: 0.7;
    background: linear-gradient(90deg, #e63946, #ff6b6b, #e63946);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.5;
}

/* ========================================
   Animations
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-visual {
        order: -1;
        height: 300px;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: linear-gradient(180deg, rgba(10, 10, 15, 0.98) 0%, rgba(18, 18, 26, 0.95) 100%);
        flex-direction: column;
        padding: var(--spacing-xl);
        gap: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero {
        padding-top: 100px;
        min-height: auto;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}