/* ============================================
   CSS Variables & Reset
   ============================================ */

:root {
    --primary: #ffffff;
    --secondary: #e5e7eb;
    --accent: #3b82f6;
    --dark: #0a0a0a;
    --dark-light: #1a1a1a;
    --dark-lighter: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border: rgba(255, 255, 255, 0.08);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Navigation
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.nav.scrolled {
    background: rgba(10, 10, 10, 0.95);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 0;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    font-size: 1rem;
    opacity: 0.6;
}

.logo-text {
    font-weight: 500;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 400;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

.mobile-menu {
    display: none;
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    padding: 2rem 24px;
    z-index: 999;
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition);
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
}

.mobile-menu a {
    display: block;
    color: var(--text-primary);
    text-decoration: none;
    padding: 1rem 0;
    font-size: 1.1rem;
    font-weight: 400;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.mobile-menu a:last-child {
    border-bottom: none;
}

.mobile-menu a:hover {
    color: var(--accent);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: var(--dark);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.hero-gradient {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(5deg); }
    66% { transform: translate(-20px, 20px) rotate(-5deg); }
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(to right, rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 80px 80px;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-title-main {
    display: block;
    font-size: 5rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-title-sub {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    letter-spacing: -0.01em;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
    max-width: 600px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 5rem;
}

.btn {
    padding: 0.875rem 1.75rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    display: inline-block;
    border: none;
    cursor: pointer;
    letter-spacing: -0.01em;
}

.btn-primary {
    background: var(--primary);
    color: var(--dark);
}

.btn-primary:hover {
    background: var(--secondary);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    border-color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
}

.hero-stats {
    display: flex;
    gap: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.stat-item {
    text-align: left;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    letter-spacing: -0.03em;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translate(-50%, 0); }
    50% { transform: translate(-50%, 8px); }
}

.scroll-indicator span {
    display: block;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.75rem;
}

.scroll-arrow {
    width: 1px;
    height: 40px;
    background: var(--text-muted);
    margin: 0 auto;
}

/* ============================================
   Sections
   ============================================ */

section {
    padding: 8rem 0;
    position: relative;
}

.section-header {
    margin-bottom: 5rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* ============================================
   About Section
   ============================================ */

.about {
    background: var(--dark);
    border-top: 1px solid var(--border);
}

.about-content {
    display: grid;
    gap: 6rem;
}

.about-text h3 {
    font-size: 1.875rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.about-text p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--dark-light);
    padding: 2.5rem;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    background: var(--dark-lighter);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.feature-card h4 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* ============================================
   Projects Section
   ============================================ */

.projects {
    background: var(--dark);
    border-top: 1px solid var(--border);
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.project-card {
    background: var(--dark-light);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    display: grid;
    grid-template-columns: 300px 1fr;
}

.project-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

.project-image {
    width: 100%;
    height: 100%;
    min-height: 200px;
    background: var(--dark-lighter);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    border-right: 1px solid var(--border);
}

.project-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(59, 130, 246, 0.05) 100%);
}

.project-content {
    padding: 2.5rem;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.project-name {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.project-year {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid var(--border);
    font-family: var(--font-mono);
}

.project-tagline {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
    font-size: 0.9375rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.project-tag {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-muted);
    padding: 0.375rem 0.875rem;
    font-size: 0.8125rem;
    border: 1px solid var(--border);
    font-family: var(--font-mono);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.project-link:hover {
    border-bottom-color: var(--text-primary);
}

.project-link::after {
    content: '→';
    transition: var(--transition);
}

.project-link:hover::after {
    transform: translateX(4px);
}

.loading {
    text-align: center;
    padding: 4rem 0;
    color: var(--text-muted);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

/* ============================================
   Contact Section
   ============================================ */

.contact {
    background: var(--dark);
    border-top: 1px solid var(--border);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 6rem;
}

.contact-info h3 {
    font-size: 1.875rem;
    margin-bottom: 1rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--dark-light);
    border: 1px solid var(--border);
    text-decoration: none;
    transition: var(--transition);
}

.contact-method:hover {
    border-color: rgba(255, 255, 255, 0.15);
    background: var(--dark-lighter);
}

.contact-method-icon {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    flex-shrink: 0;
}

.contact-method-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 0.125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-method-value {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.contact-form-container {
    background: var(--dark-light);
    padding: 2.5rem;
    border: 1px solid var(--border);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.875rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    background: var(--dark);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9375rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--text-secondary);
    background: var(--dark);
}

.btn-full {
    width: 100%;
    background: var(--primary);
    color: var(--dark);
    padding: 1rem;
    font-weight: 500;
}

.btn-full:hover {
    background: var(--secondary);
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: var(--dark);
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 6rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.9375rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.footer-column h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-column a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: 0.75rem;
    font-size: 0.9375rem;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 968px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero-title-main {
        font-size: 3.5rem;
    }
    
    .hero-title-sub {
        font-size: 1.25rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        gap: 2.5rem;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .project-card {
        grid-template-columns: 1fr;
    }
    
    .project-image {
        height: 240px;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    section {
        padding: 5rem 0;
    }
}

@media (max-width: 640px) {
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title-main {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }
    
    .stat-item {
        text-align: center;
    }
    
    .project-content {
        padding: 1.5rem;
    }
    
    .contact-form-container {
        padding: 1.5rem;
    }
}