/* ========================
   CSS Variables & Theme
======================== */
:root {
    /* Colors - Light Mode */
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #6366f1;
    --secondary-color: #7c3aed;
    --accent-color: #06b6d4;
    
    --background: #ffffff;
    --background-secondary: #f8fafc;
    --surface: #ffffff;
    --surface-hover: #f1f5f9;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --gradient-mesh: radial-gradient(at 40% 20%, hsla(248, 84%, 63%, 0.3) 0px, transparent 50%),
                      radial-gradient(at 80% 0%, hsla(189, 100%, 56%, 0.2) 0px, transparent 50%),
                      radial-gradient(at 0% 50%, hsla(355, 100%, 93%, 0.2) 0px, transparent 50%),
                      radial-gradient(at 80% 50%, hsla(340, 100%, 76%, 0.2) 0px, transparent 50%),
                      radial-gradient(at 0% 100%, hsla(269, 100%, 77%, 0.2) 0px, transparent 50%),
                      radial-gradient(at 80% 100%, hsla(314, 100%, 76%, 0.2) 0px, transparent 50%);
    
    /* 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;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
}

/* Dark Mode */
[data-theme="dark"] {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #a78bfa;
    --accent-color: #22d3ee;
    
    --background: #0a0a0f;
    --background-secondary: #111118;
    --surface: #1a1a24;
    --surface-hover: #25252f;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    --border-color: #334155;
    --shadow-color: rgba(0, 0, 0, 0.5);
    
    --gradient-mesh: radial-gradient(at 40% 20%, hsla(248, 84%, 63%, 0.15) 0px, transparent 50%),
                      radial-gradient(at 80% 0%, hsla(189, 100%, 56%, 0.1) 0px, transparent 50%),
                      radial-gradient(at 0% 50%, hsla(355, 100%, 93%, 0.1) 0px, transparent 50%),
                      radial-gradient(at 80% 50%, hsla(340, 100%, 76%, 0.1) 0px, transparent 50%),
                      radial-gradient(at 0% 100%, hsla(269, 100%, 77%, 0.1) 0px, transparent 50%),
                      radial-gradient(at 80% 100%, hsla(314, 100%, 76%, 0.1) 0px, transparent 50%);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

::selection {
    background: var(--primary-color);
    color: white;
}

/* ========================
   Typography
======================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h5 { font-size: clamp(1.125rem, 2vw, 1.25rem); }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

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

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

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

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

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    position: relative;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
}

.gradient-text {
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-secondary);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(79, 70, 229, 0.5);
    color: white;
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--surface-hover);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--gradient-secondary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ========================
   Loading Screen
======================== */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--background);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

.loader-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

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

/* ========================
   Navigation
======================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: rgba(10, 10, 15, 0.8);
}

.navbar.scrolled {
    box-shadow: 0 4px 20px var(--shadow-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-text {
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-secondary);
    transition: width var(--transition-base);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--surface-hover);
    transform: rotate(180deg);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

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

/* ========================
   Hero Section
======================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: var(--gradient-mesh), var(--background);
}

.particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.typed-text {
    color: var(--text-secondary);
}

#typed {
    color: var(--primary-color);
    font-weight: 700;
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: var(--font-heading);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    width: 400px;
    height: 400px;
    margin: 0 auto;
}

.profile-img {
    width: 100%;
    height: 100%;
    border-radius: 20px;
    object-fit: cover;
    box-shadow: 0 20px 40px var(--shadow-color);
    transition: transform var(--transition-base);
}

.profile-img:hover {
    transform: scale(1.05);
}

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

.floating-icon {
    position: absolute;
    font-size: 2rem;
    color: var(--primary-color);
    animation: float 6s ease-in-out infinite;
}

.floating-icon:nth-child(1) { top: -20px; left: -20px; animation-delay: 0s; }
.floating-icon:nth-child(2) { top: -20px; right: -20px; animation-delay: 1s; }
.floating-icon:nth-child(3) { bottom: -20px; left: -20px; animation-delay: 2s; }
.floating-icon:nth-child(4) { bottom: -20px; right: -20px; animation-delay: 3s; }
.floating-icon:nth-child(5) { top: 50%; left: -30px; animation-delay: 4s; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    33% { transform: translateY(-10px) rotate(5deg); }
    66% { transform: translateY(10px) rotate(-5deg); }
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.scroll-indicator i {
    color: var(--primary-color);
}

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

/* ========================
   About Section
======================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-text h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.about-highlights {
    margin: var(--spacing-xl) 0;
}

.highlight {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--surface);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.highlight:hover {
    background: var(--surface-hover);
    transform: translateX(10px);
}

.highlight i {
    font-size: 1.5rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.highlight h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.highlight p {
    font-size: 0.875rem;
    margin: 0;
}

.about-personal {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--surface);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
}

.code-window {
    background: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 10px 30px var(--shadow-color);
}

.code-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--surface-hover);
    border-bottom: 1px solid var(--border-color);
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-dot.red { background: #ff5f56; }
.code-dot.yellow { background: #ffbd2e; }
.code-dot.green { background: #27c93f; }

.code-title {
    margin-left: auto;
    font-size: 0.875rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.code-content {
    padding: var(--spacing-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    overflow-x: auto;
}

.code-comment { color: var(--text-muted); }
.code-key { color: var(--primary-color); }
.code-string { color: var(--accent-color); }
.code-number { color: var(--secondary-color); }

/* ========================
   Skills Section
======================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.skill-category {
    background: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.skill-category h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.skill-category h3 i {
    color: var(--primary-color);
}

.skill-item {
    margin-bottom: var(--spacing-md);
}

.skill-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.skill-level {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.skill-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-secondary);
    border-radius: var(--radius-full);
    width: 0;
    transition: width 1.5s ease;
}

.tech-stack {
    text-align: center;
}

.tech-stack h3 {
    margin-bottom: var(--spacing-xl);
}

.tech-icons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
}

.tech-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
}

.tech-icon:hover {
    transform: translateY(-5px) scale(1.1);
    background: var(--surface-hover);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.tech-icon i {
    font-size: 2rem;
    color: var(--text-primary);
}

/* ========================
   Experience Section
======================== */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--gradient-secondary);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 50%;
    padding-right: var(--spacing-2xl);
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 50%;
    padding-left: var(--spacing-2xl);
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border: 4px solid var(--background);
    border-radius: 50%;
    z-index: 1;
}

.timeline-content {
    background: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 5px 20px var(--shadow-color);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.timeline-header h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.timeline-header h4 {
    color: var(--primary-color);
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.timeline-date {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.timeline-body {
    margin-top: var(--spacing-md);
}

.timeline-body ul {
    list-style-position: inside;
    margin-top: var(--spacing-sm);
}

.timeline-body li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

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

.tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--surface-hover);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

/* ========================
   Projects Section
======================== */
.featured-project {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    background: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-3xl);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.project-image {
    position: relative;
    overflow: hidden;
}

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

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

.project-overlay {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
}

.project-details {
    padding: var(--spacing-2xl);
}

.project-details h3 {
    margin-bottom: var(--spacing-md);
}

.project-highlights {
    display: flex;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.highlight-item i {
    color: var(--primary-color);
}

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

.tech-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.project-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px var(--shadow-color);
}

.project-card-header {
    padding: var(--spacing-xl);
    background: var(--gradient-secondary);
    color: white;
}

.project-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.project-card-header h3 {
    color: white;
    margin: 0;
}

.project-card-body {
    padding: var(--spacing-xl);
    flex: 1;
}

.project-stats {
    margin-top: var(--spacing-md);
}

.project-stats .stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.project-stats .stat i {
    color: var(--primary-color);
}

.project-card-footer {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--surface-hover);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.project-link:hover {
    color: var(--primary-light);
}

.project-tags {
    display: flex;
    gap: var(--spacing-xs);
}

.project-tags span {
    padding: 2px 6px;
    background: var(--background);
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    font-size: 0.625rem;
    font-weight: 500;
}

.github-stats {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--surface);
    border-radius: var(--radius-lg);
}

.github-stats h3 {
    margin-bottom: var(--spacing-xl);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    text-align: center;
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.github-link {
    margin-top: var(--spacing-xl);
}

/* ========================
   Publications Section
======================== */
.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.publication-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.publication-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.publication-card.featured {
    grid-column: 1 / -1;
    background: var(--gradient-mesh), var(--surface);
}

.publication-header {
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.reading-time {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.publication-content {
    padding: var(--spacing-xl);
}

.publication-content h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.publication-meta {
    margin: var(--spacing-md) 0;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.meta-item i {
    color: var(--primary-color);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.read-more:hover {
    gap: var(--spacing-sm);
}

/* ========================
   Contact Section
======================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-form-wrapper {
    background: var(--surface);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.info-card {
    background: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.info-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.info-card h3 {
    margin-bottom: var(--spacing-sm);
}

.info-card a {
    color: var(--text-secondary);
}

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

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.social-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--gradient-secondary);
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 5px 15px var(--shadow-color);
}

/* ========================
   Footer
======================== */
.footer {
    background: var(--surface);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-left,
.footer-center,
.footer-right {
    flex: 1;
}

.footer-center {
    text-align: center;
}

.footer-center i {
    color: red;
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.footer-right {
    text-align: right;
}

.back-to-top {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gradient-secondary);
    color: white;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px var(--shadow-color);
}

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

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: 0 10px 30px var(--shadow-color);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 60px;
        margin-right: 0;
        padding-left: var(--spacing-lg);
        padding-right: var(--spacing-lg);
    }
    
    .timeline-marker {
        left: 30px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .publications-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-right {
        text-align: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .image-wrapper {
        width: 300px;
        height: 300px;
    }
    
    .floating-icon {
        display: none;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ========================
   Print Styles
======================== */
@media print {
    .navbar,
    .scroll-indicator,
    .theme-toggle,
    .back-to-top,
    .hamburger {
        display: none;
    }
    
    body {
        color: black;
        background: white;
    }
    
    .section {
        page-break-inside: avoid;
    }
}