/* ============ RESET & BASE ============ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-tertiary: #18181b;
    --border: #27272a;
    --border-hover: #3f3f46;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #60a5fa;
    --accent-hover: #93c5fd;
    --accent-glow: rgba(96, 165, 250, 0.15);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    cursor: default;
}

/* Background grid pattern */
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-image:
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

.cursor-glow {
    position: fixed;
    width: 500px; height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 1;
    transition: opacity 0.3s;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 2;
}

/* ============ NAVIGATION ============ */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo-bracket {
    color: var(--accent);
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
}

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

.nav-links a:not(.nav-external)::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0;
    width: 0; height: 1px;
    background: var(--accent);
    transition: width 0.2s;
}

.nav-links a:not(.nav-external):hover::after {
    width: 100%;
}

.nav-external {
    color: var(--accent) !important;
}

/* ============ HERO ============ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: 6rem 2rem 4rem;
    z-index: 2;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-greeting {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.hero-title {
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 700;
    letter-spacing: -3px;
    margin-bottom: 1.5rem;
    line-height: 1;
}

.cursor-blink {
    color: var(--accent);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-weight: 400;
}

.accent {
    color: var(--accent);
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.85rem 1.75rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s;
    display: inline-block;
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px var(--accent-glow);
}

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

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {
    0% { transform: scaleY(0.5); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    50.01% { transform-origin: bottom; }
    100% { transform: scaleY(0.5); transform-origin: bottom; }
}

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

/* ============ SECTIONS ============ */
.section {
    padding: 6rem 0;
    position: relative;
    z-index: 2;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s, transform 0.6s;
}

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

.section-alt {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 3rem;
}

.section-number {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 1rem;
    font-weight: 500;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -1px;
}

.section-title::after {
    content: '';
    display: inline-block;
    width: 100px;
    height: 1px;
    background: var(--border);
    vertical-align: middle;
    margin-left: 1.5rem;
}

/* ============ ABOUT ============ */
.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
}

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

.about-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.info-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    transition: border-color 0.2s;
}

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

.info-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.info-value {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
}

/* ============ SKILLS ============ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.75rem;
    transition: all 0.3s;
    opacity: 0;
    transform: translateY(20px);
}

.skill-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.skill-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.skill-icon {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    color: var(--text-secondary);
    padding: 0.35rem 0;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
    position: relative;
    padding-left: 1.25rem;
}

.skill-list li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

.skill-list li:last-child {
    border-bottom: none;
}

/* ============ TIMELINE ============ */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 1px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding-bottom: 2.5rem;
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.5s;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -2.4rem;
    top: 0.4rem;
    width: 12px; height: 12px;
    background: var(--bg-primary);
    border: 2px solid var(--accent);
    border-radius: 50%;
}

.timeline-marker::after {
    content: '';
    position: absolute;
    inset: -6px;
    border: 1px solid var(--accent);
    border-radius: 50%;
    opacity: 0.3;
    animation: ping 2s infinite;
}

@keyframes ping {
    0% { transform: scale(1); opacity: 0.3; }
    100% { transform: scale(1.8); opacity: 0; }
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.timeline-content h3 {
    font-size: 1.2rem;
    margin: 0.5rem 0;
    font-weight: 600;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ============ PROJECTS ============ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.75rem;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: all 0.3s;
    opacity: 0;
    transform: translateY(20px);
}

.project-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

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

.project-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    background: var(--bg-primary);
    color: var(--accent);
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-arrow {
    color: var(--text-muted);
    transition: all 0.2s;
}

.project-card:hover .project-arrow {
    color: var(--accent);
    transform: translate(2px, -2px);
}

.project-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============ FOOTER ============ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 3rem 0 2rem;
    position: relative;
    z-index: 2;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.footer-brand {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 600;
}

.footer-brand p {
    font-family: var(--font-sans);
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-mono {
    font-family: var(--font-mono);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
    .nav-links { gap: 1rem; }
    .nav-links a { font-size: 0.8rem; }
    .nav-links li:nth-child(1),
    .nav-links li:nth-child(3) { display: none; }
    .about-grid { grid-template-columns: 1fr; }
    .section-title::after { display: none; }
    .container { padding: 0 1.25rem; }
    .nav-container { padding: 0 1.25rem; }
    .section { padding: 4rem 0; }
    .cursor-glow { display: none; }
}