:root {
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-card: #161618;
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --border: #27272a;
    --border-hover: #3f3f46;
    --radius: 8px;
    --transition: 150ms ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 64px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.nav-container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.5px;
}

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

.nav-links {
    list-style: none;
    display: flex;
    gap: 28px;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: color var(--transition);
}

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

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 24px 60px;
}

.hero-content {
    max-width: 640px;
    text-align: left;
}

.hero-greeting {
    color: var(--accent);
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
}

.hero-name {
    font-size: clamp(40px, 8vw, 64px);
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 8px;
}

.hero-title {
    font-size: clamp(18px, 3.5vw, 28px);
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 520px;
    margin-bottom: 32px;
}

.hero-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 10px 20px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

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

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

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

.btn-outline:hover {
    border-color: var(--border-hover);
    background: var(--bg-card);
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 40px;
}

/* About */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 15px;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.stat {
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.stat-number {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: -1px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

/* Experience Timeline */
.timeline {
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

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

.timeline-item::before {
    content: '';
    position: absolute;
    left: -29px;
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--bg-secondary);
}

.timeline-date {
    font-size: 13px;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 4px;
    letter-spacing: 0.5px;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: border-color var(--transition);
}

.timeline-content:hover {
    border-color: var(--border-hover);
}

.timeline-content h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-company {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.timeline-details {
    list-style: none;
    padding: 0;
}

.timeline-details li {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 4px 0 4px 16px;
    position: relative;
    line-height: 1.5;
}

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

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.skill-category-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.skill-tag {
    font-size: 12px;
    color: var(--text-secondary);
    background: var(--bg-primary);
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.skill-tag:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Contact */
.contact-content {
    max-width: 520px;
}

.contact-text {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 24px;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: color var(--transition);
}

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

/* Footer */
.footer {
    padding: 24px;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 13px;
}

/* Responsive */
@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .nav-links {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: 100px 24px 60px;
    }

    .section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .about-stats {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        justify-content: center;
    }
}