:root {
    /* Colors - Dark Theme */
    --bg-dark: #0a0a0c;
    --bg-surface: #131316;
    --bg-surface-elevated: #1a1a20;
    
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --text-tertiary: #6c757d;
    
    --accent-blue: #4361ee;
    --accent-purple: #7209b7;
    --accent-gradient: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    
    /* Typography */
    --font-main: 'Inter', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

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

/* Typography Utilities */
h1, h2, h3, h4 {
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.8rem;
    border-radius: 100px;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-medium);
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    border: none;
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: var(--glass-bg);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 0;
    z-index: 100;
    transition: var(--transition-medium);
}

.navbar.scrolled {
    padding: 1rem 0;
    background: rgba(10, 10, 12, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem 2rem;
    gap: 4rem;
}

.hero-content {
    flex: 1;
    z-index: 2;
}

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #fff, #a5a5a5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 90%;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 10px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
    overflow: hidden;
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: var(--transition-slow);
}

.glass-card:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.02);
}

.hero-image {
    width: 100%;
    max-width: 500px;
    border-radius: 16px;
    display: block;
    object-fit: cover;
}

/* Work Section */
.work {
    max-width: 1200px;
    margin: 0 auto;
    padding: 8rem 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
}

.project-card {
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    overflow: hidden;
    transition: var(--transition-medium);
    display: flex;
    flex-direction: column;
}

@media (min-width: 768px) {
    .project-card {
        flex-direction: row;
        align-items: center;
    }
    
    .project-card:nth-child(even) {
        flex-direction: row-reverse;
    }
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-image-container {
    flex: 1.2;
    padding: 2rem;
    background: radial-gradient(circle at center, var(--bg-surface-elevated) 0%, var(--bg-surface) 100%);
    display: flex;
    justify-content: center;
    align-items: center;
}

.project-image-container img {
    width: 100%;
    max-width: 400px;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    transition: var(--transition-medium);
}

.project-card:hover .project-image-container img {
    transform: scale(1.03);
}

.project-info {
    flex: 1;
    padding: 3rem;
}

.project-info h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.project-info p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.project-tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

/* About Section */
.about {
    background: var(--bg-surface);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
    padding: 8rem 0;
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
}

@media (min-width: 768px) {
    .about-container {
        grid-template-columns: 3fr 2fr;
    }
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 2rem;
}

.skill-tag {
    background: var(--bg-surface-elevated);
    padding: 0.5rem 1.2rem;
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    justify-content: center;
}

.stat-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-blue);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Footer / Contact */
.contact {
    padding: 8rem 2rem 2rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.footer-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
}

.footer-content p {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-size: 1.1rem;
}

.social-links {
    margin-top: 4rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.social-links a {
    color: var(--text-secondary);
    font-weight: 500;
}

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

.footer-bottom {
    margin-top: 6rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* Animations & Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 8rem;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-visual {
        margin-top: 2rem;
    }
    
    .nav-links {
        display: none; /* simple hidden nav for mobile for now */
    }
    
    .project-info {
        padding: 2rem;
    }
}