/* ========================================
   CSS Variables & Theme
   ======================================== */
:root {
    /* Dark terminal palette */
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-tertiary: #18181b;
    --bg-card: #1a1a1d;
    
    /* Text colors */
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    /* Accent - Warm amber/orange for contrast */
    --accent: #f59e0b;
    --accent-dim: #d97706;
    --accent-glow: rgba(245, 158, 11, 0.15);
    
    /* Secondary accent - Cool cyan */
    --accent-secondary: #22d3d3;
    --accent-secondary-dim: #14b8b8;
    
    /* Terminal colors */
    --terminal-green: #4ade80;
    --terminal-red: #f87171;
    --terminal-yellow: #fbbf24;
    
    /* Typography */
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
    --font-serif: 'Instrument Serif', Georgia, serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

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

body {
    font-family: var(--font-mono);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Background effects */
.noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    z-index: 1000;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    background-image: 
        linear-gradient(rgba(245, 158, 11, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(245, 158, 11, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

/* Selection */
::selection {
    background: var(--accent);
    color: var(--bg-primary);
}

/* Links */
a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-secondary);
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: var(--space-lg) var(--space-2xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(to bottom, var(--bg-primary), transparent);
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav-brand {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-brand .prompt {
    color: var(--accent);
    margin-right: var(--space-xs);
}

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

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.85rem;
    position: relative;
    padding: var(--space-xs) 0;
}

.nav-links a::before {
    content: '>';
    position: absolute;
    left: -1rem;
    opacity: 0;
    color: var(--accent);
    transition: all var(--transition-fast);
    transform: translateX(-5px);
}

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

.nav-links a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

/* Blinking cursor */
.cursor-blink {
    animation: blink 1s step-end infinite;
    color: var(--accent);
}

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    padding: var(--space-3xl);
    max-width: 1400px;
    margin: 0 auto;
}

.hero-tag {
    color: var(--accent);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
    animation: fadeSlideUp 0.6s ease-out;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 400;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.hero-title .line {
    display: block;
    animation: fadeSlideUp 0.6s ease-out both;
}

.hero-title .line:nth-child(1) {
    animation-delay: 0.1s;
}

.hero-title .line:nth-child(2) {
    animation-delay: 0.2s;
    color: var(--accent);
}

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

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: var(--space-xl);
    animation: fadeSlideUp 0.6s ease-out 0.3s both;
}

.hero-subtitle em {
    color: var(--accent-secondary);
    font-style: normal;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    animation: fadeSlideUp 0.6s ease-out 0.4s both;
}

/* Terminal in hero */
.hero-terminal {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 
        0 0 0 1px rgba(0, 0, 0, 0.5),
        0 20px 50px -20px rgba(0, 0, 0, 0.5);
    animation: fadeSlideUp 0.8s ease-out 0.5s both;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-tertiary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.terminal-dot.red { background: var(--terminal-red); }
.terminal-dot.yellow { background: var(--terminal-yellow); }
.terminal-dot.green { background: var(--terminal-green); }

.terminal-title {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.terminal-body {
    padding: var(--space-lg);
    font-size: 0.85rem;
    line-height: 1.8;
}

.terminal-body .prompt {
    color: var(--terminal-green);
    margin-right: var(--space-sm);
}

.terminal-body pre {
    color: var(--text-secondary);
    margin: var(--space-sm) 0 var(--space-lg) var(--space-lg);
    font-size: 0.8rem;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-dim);
    border-color: var(--accent-dim);
    color: var(--bg-primary);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px -10px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-large {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1rem;
}

/* ========================================
   Sections
   ======================================== */
.section {
    padding: var(--space-3xl);
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-2xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, rgba(255, 255, 255, 0.1), transparent);
}

.section-number {
    color: var(--accent);
    font-weight: 400;
}

/* ========================================
   About Section
   ======================================== */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.about-text {
    font-size: 1rem;
    color: var(--text-secondary);
}

.about-text p {
    margin-bottom: var(--space-lg);
}

.about-text strong {
    color: var(--text-primary);
    font-weight: 500;
}

.about-text em {
    color: var(--accent);
    font-style: normal;
}

.image-frame {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}

.ascii-art {
    font-size: 0.65rem;
    line-height: 1.4;
    color: var(--accent);
    white-space: pre;
    text-align: center;
}

/* ========================================
   Experience Timeline
   ======================================== */
.timeline {
    position: relative;
    padding-left: var(--space-2xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, var(--accent), rgba(255, 255, 255, 0.1), transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-2xl);
}

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--space-2xl) - 4px);
    top: 8px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 2px solid var(--accent);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    border-color: rgba(245, 158, 11, 0.2);
    transform: translateX(5px);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.timeline-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.timeline-date {
    font-size: 0.8rem;
    color: var(--accent);
    background: var(--accent-glow);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
}

.timeline-company {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
}

.timeline-company .location {
    color: var(--text-muted);
}

.timeline-details {
    list-style: none;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.timeline-details li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.timeline-details li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.timeline-link {
    display: inline-block;
    margin-top: var(--space-md);
    font-size: 0.85rem;
    color: var(--accent-secondary);
}

.timeline-link:hover {
    color: var(--accent);
}

.company-link {
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px dashed var(--accent);
    transition: all var(--transition-fast);
}

.company-link:hover {
    color: var(--accent);
    border-bottom-style: solid;
}

/* ========================================
   Projects Grid
   ======================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-base);
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: rgba(245, 158, 11, 0.3);
    box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.5);
}

.project-card.featured {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--bg-card), rgba(245, 158, 11, 0.05));
}

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

.project-icon {
    color: var(--accent);
}

.project-links {
    display: flex;
    gap: var(--space-md);
}

.project-links a {
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.project-links a:hover {
    color: var(--accent);
}

.project-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.project-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex: 1;
    margin-bottom: var(--space-lg);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    list-style: none;
}

.project-tech li {
    font-size: 0.75rem;
    color: var(--accent-secondary);
    background: rgba(34, 211, 211, 0.1);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

/* ========================================
   Blog Section
   ======================================== */
.blog-intro {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--space-2xl);
    max-width: 600px;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.blog-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-3px);
    border-color: rgba(245, 158, 11, 0.2);
}

.blog-meta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.blog-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.blog-tag {
    font-size: 0.75rem;
    color: var(--accent-secondary);
    background: rgba(34, 211, 211, 0.1);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

.blog-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    line-height: 1.4;
}

.blog-excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex: 1;
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.blog-link {
    font-size: 0.85rem;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.blog-link:hover {
    color: var(--accent-secondary);
}

.blog-link.disabled {
    color: var(--text-muted);
    pointer-events: none;
}

.blog-cta {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
}

.blog-cta p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

/* ========================================
   Contact Section
   ======================================== */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.contact-link {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    padding: var(--space-md);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.contact-link:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.contact-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    min-width: 80px;
    text-align: right;
}

.contact-value {
    color: var(--text-primary);
    font-size: 0.9rem;
    text-align: left;
    flex: 1;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    text-align: center;
    padding: var(--space-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: var(--space-3xl);
}

.footer p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-sub {
    margin-top: var(--space-sm);
    font-size: 0.75rem;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        padding: calc(var(--space-3xl) * 2) var(--space-xl) var(--space-3xl);
        min-height: auto;
    }
    
    .hero-terminal {
        max-width: 500px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav {
        padding: var(--space-md);
    }
    
    .nav-links {
        gap: var(--space-md);
    }
    
    .nav-links a::before {
        display: none;
    }
    
    .section {
        padding: var(--space-2xl) var(--space-lg);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        display: none;
    }
    
    .timeline-header {
        flex-direction: column;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-links {
        gap: var(--space-sm);
        font-size: 0.75rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Scroll animations
   ======================================== */
.section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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