:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-card: #16161d;
    --bg-card-hover: #1c1c25;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.15);
    --border: #27272a;
    --border-light: #3f3f46;
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s ease;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ═══════════════════ NAVBAR ═══════════════════ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--border);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

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

.nav-links {
    list-style: none;
    display: flex;
    gap: 32px;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition);
}

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

.nav-links a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

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

/* ═══════════════════ HERO ═══════════════════ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 120px 24px 80px;
    gap: 60px;
}

.hero-content {
    flex: 1;
    max-width: 640px;
}

.hero-greeting {
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.hero-title {
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.35rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 20px;
}

.hero-description {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 520px;
    margin-bottom: 32px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

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

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

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.hero-visual {
    flex-shrink: 0;
}

.hero-avatar {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--border);
    box-shadow: 0 0 60px var(--accent-glow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.hero-avatar:hover {
    transform: scale(1.03);
    box-shadow: 0 0 80px rgba(99, 102, 241, 0.25);
}

/* ═══════════════════ SECTIONS ═══════════════════ */
.section {
    padding: 100px 0;
}

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

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 48px;
    letter-spacing: -1px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 48px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
}

/* ═══════════════════ ABOUT ═══════════════════ */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.about-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.highlight-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
}

.highlight-card:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
    transform: translateX(4px);
}

.highlight-icon {
    font-size: 1.5rem;
    margin-bottom: 8px;
    display: block;
}

.highlight-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

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

/* ═══════════════════ SKILLS ═══════════════════ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
}

.skill-category-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent-light);
    margin-bottom: 20px;
    font-weight: 600;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all var(--transition);
}

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

/* ═══════════════════ PROJECTS ═══════════════════ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--border-light);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.project-icon {
    width: 28px;
    height: 28px;
    color: var(--accent);
}

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

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

.project-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.project-description {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: 20px;
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.project-tags span {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 4px 10px;
    border-radius: 4px;
}

/* ═══════════════════ CONTRIBUTIONS ═══════════════════ */
.contributions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.contribution-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: all var(--transition);
    overflow: hidden;
    min-width: 0;
}

.contribution-card:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
}

.contribution-org {
    margin-bottom: 12px;
}

.contribution-badge {
    display: inline-block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    color: var(--accent-light);
    background: var(--accent-glow);
    padding: 4px 10px;
    border-radius: 4px;
}

.contribution-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.contribution-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 12px;
    line-height: 1.5;
}

.contribution-link {
    color: var(--accent-light);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: color var(--transition);
}

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

.github-graph {
    text-align: center;
}

.github-graph img {
    max-width: 100%;
    border-radius: var(--radius-sm);
    opacity: 0.85;
    transition: opacity var(--transition);
}

.github-graph img:hover {
    opacity: 1;
}

/* ═══════════════════ TIMELINE ═══════════════════ */
.timeline {
    position: relative;
    padding-left: 40px;
}

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

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

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

.timeline-marker {
    position: absolute;
    left: -36px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 2px var(--accent);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
}

.timeline-content:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
    transform: translateX(4px);
}

.timeline-date {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--accent-light);
    background: var(--accent-glow);
    padding: 2px 10px;
    border-radius: 4px;
    margin-bottom: 8px;
    font-weight: 500;
}

.timeline-content h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.timeline-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

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

.contact-text {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 24px;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 32px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.contact-card:hover {
    border-color: var(--accent);
    color: var(--accent-light);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.contact-card span {
    font-weight: 500;
    font-size: 0.95rem;
}

/* ═══════════════════ FOOTER ═══════════════════ */
.footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
    text-align: center;
}

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

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

.hero-content,
.hero-visual {
    animation: fadeInUp 0.8s ease forwards;
}

.hero-visual {
    animation-delay: 0.2s;
}

/* ═══════════════════ RESPONSIVE ═══════════════════ */
@media (max-width: 1024px) {
    .projects-grid,
    .contributions-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        flex-direction: column-reverse;
        text-align: center;
        padding-top: 100px;
        gap: 40px;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-avatar {
        width: 200px;
        height: 200px;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .projects-grid,
    .skills-grid {
        grid-template-columns: 1fr;
    }

    .contributions-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: 16px;
        align-items: center;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }
}