@import url('https://cdn.jsdelivr.net/npm/geist@1.3.0/dist/fonts/geist-sans/style.css');
@import url('https://cdn.jsdelivr.net/npm/geist@1.3.0/dist/fonts/geist-mono/style.css');

:root {
    --bg: oklch(0.12 0.00 0);
    --surface: oklch(0.16 0.008 60.0);
    --ink: oklch(0.95 0.01 60.0);
    --muted: oklch(0.65 0.01 60.0);
    --primary: oklch(0.65 0.146 60.0);
    --accent: oklch(0.55 0.15 250.0);
    --border: oklch(0.22 0.01 60.0);
    --border-bright: oklch(0.35 0.02 60.0);

    --font-main: "Geist Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: "Geist Mono", monospace;

    --transition-base: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-reveal: 1.2s cubic-bezier(0.16, 1, 0.3, 1);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

[data-theme="light"] {
    --bg: oklch(1.00 0.000 0);
    --surface: oklch(0.98 0.005 60.0);
    --ink: oklch(0.12 0.01 60.0);
    --muted: oklch(0.45 0.01 60.0);
    --border: oklch(0.92 0.01 60.0);
    --border-bright: oklch(0.85 0.02 60.0);
}

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

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

body {
    background-color: var(--bg);
    color: var(--ink);
    font-family: var(--font-main);
    line-height: 1.5;
    transition: background-color var(--transition-base), color var(--transition-base);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3 {
    font-weight: 500;
    letter-spacing: -0.03em;
    line-height: 1.1;
    text-wrap: balance;
}

/* Nav */
.nav-container {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: color-mix(in oklch, var(--bg), transparent 15%);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--ink);
    letter-spacing: -0.02em;
}

.nav-controls {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--muted);
    font-size: 0.9rem;
    transition: var(--transition-base);
}

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

.control-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--ink);
    padding: 0.5rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    border-color: var(--border-bright);
    background: var(--surface);
}

.sun-icon, .moon-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }
[data-theme="dark"] .sun-icon { display: block; }

/* Main */
.main-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 12rem 2rem 8rem;
}

/* Hero */
.hero {
    margin-bottom: 8rem;
    text-align: left;
}

.hero h1 {
    font-size: clamp(3.5rem, 8vw, 5.5rem);
    margin-bottom: 2rem;
    font-weight: 500;
}

.hero p {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    color: var(--muted);
    max-width: 32ch;
    margin-bottom: 3rem;
    line-height: 1.3;
}

.cta-group {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-base);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--ink);
    color: var(--bg);
}
.btn-primary:hover {
    background: var(--primary);
    color: white;
}

.btn-secondary {
    border: 1px solid var(--border);
    color: var(--ink);
    background: transparent;
}
.btn-secondary:hover {
    background: var(--surface);
    border-color: var(--border-bright);
}

/* Logos */
.logos-section {
    padding-bottom: 8rem;
}

.logos-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 2rem;
    display: block;
}

.logos-container {
    display: flex;
    gap: 4rem;
    flex-wrap: wrap;
    align-items: center;
}

.logo-item {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--muted);
    filter: grayscale(1);
    transition: var(--transition-base);
}

.logo-item:hover {
    filter: grayscale(0);
    color: var(--ink);
}

/* Stats */
.stats-section {
    margin-bottom: 12rem;
    padding: 4rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 3rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.stat-value {
    display: flex;
    align-items: baseline;
    color: var(--ink);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 500;
    letter-spacing: -0.05em;
}

.stat-text {
    font-size: 2.5rem;
    font-weight: 500;
    letter-spacing: -0.05em;
    color: var(--ink);
}

.stat-plus {
    font-size: 1.5rem;
    color: var(--primary);
    margin-left: 2px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--muted);
}

/* Sections */
.section { margin-bottom: 12rem; }

.section-header {
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.section-description {
    color: var(--muted);
    font-size: 1.1rem;
    max-width: 60ch;
}

.about-content {
    font-size: 1.25rem;
    color: var(--ink);
    max-width: 65ch;
    line-height: 1.6;
}

.about-content p + p {
    margin-top: 1.5rem;
    color: var(--muted);
}

/* Expertise */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.expertise-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: var(--transition-base);
}

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

.expertise-card h3 {
    margin-bottom: 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.expertise-card ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.expertise-card li {
    font-size: 0.85rem;
    background: var(--bg);
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    color: var(--muted);
}

/* Timeline */
.timeline { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--border); }
.timeline-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 4rem;
    padding: 3rem 0;
    border-bottom: 1px solid var(--border);
}

.timeline-meta {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
    padding-top: 0.5rem;
}

.timeline-content h3 { font-size: 1.5rem; margin-bottom: 0.5rem; font-weight: 500; }
.timeline-content .position { color: var(--primary); font-weight: 500; margin-bottom: 1.5rem; display: block; font-size: 1rem; }
.timeline-content .highlights { list-style: none; color: var(--muted); display: flex; flex-direction: column; gap: 0.75rem; }
.timeline-content .highlights li { font-size: 1rem; line-height: 1.5; color: var(--muted); max-width: 65ch; }

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--border-bright);
    transform: translateY(-4px);
}

.project-card h3 { margin-bottom: 1rem; font-size: 1.5rem; }
.project-card p { color: var(--muted); font-size: 1rem; margin-bottom: 2rem; flex-grow: 1; }

.skill-list { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.skill-tag {
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--muted);
}

.card-link {
    margin-top: 2rem;
    color: var(--ink);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.card-link::after {
    content: "→";
    transition: transform var(--transition-base);
}

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

/* Currently */
.currently {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
    font-size: 0.95rem;
    color: var(--muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    position: relative;
}

.status-dot::after {
    content: "";
    position: absolute;
    inset: -4px;
    border: 1px solid #10b981;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.5; }
    100% { transform: scale(2); opacity: 0; }
}

/* Expertise Refined */
.card-icon {
    color: var(--primary);
    margin-bottom: 1.5rem;
}

/* Highlights Grid Refined */
.highlights-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.highlight-item {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: left;
    display: block;
}

.highlight-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--ink);
}

.highlight-item p {
    font-size: 0.9rem;
    color: var(--muted);
    line-height: 1.4;
}

/* Leadership Grid */
.leadership-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.leadership-card {
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
}

.leadership-card h4 {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 1rem;
}

.leadership-card p {
    color: var(--muted);
    font-size: 1rem;
}

/* Placeholders (Articles/Open Source) */
.placeholder-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.placeholder-card {
    padding: 2.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
    transition: var(--transition-base);
}

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

.placeholder-card:has(.placeholder-tag) {
    border-style: dashed;
    opacity: 0.8;
}

.placeholder-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--muted);
    display: inline-block;
    margin-bottom: 1.5rem;
}

.placeholder-card h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.placeholder-card p {
    color: var(--muted);
    font-size: 0.95rem;
}

/* Testimonials */
.testimonial-text {
    font-size: 1.1rem !important;
    font-style: italic;
    margin-bottom: 2rem;
    color: var(--ink) !important;
    line-height: 1.6;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.testimonial-author strong {
    font-size: 0.9rem;
    color: var(--ink);
}

.testimonial-author span {
    font-size: 0.8rem;
    color: var(--muted);
    font-family: var(--font-mono);
}

/* Job Refinement */
.job-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.job-body {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.mission, .challenges {
    font-size: 0.95rem;
    color: var(--ink);
}

.mission strong, .challenges strong {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--primary);
    margin-right: 0.5rem;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tech-tag {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    padding: 0.2rem 0.6rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--muted);
}

.project-details {
    margin-bottom: 2rem;
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.project-details strong {
    color: var(--primary);
}

.nda-badge {
    margin-top: 2rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--muted);
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    width: fit-content;
}

/* Highlights Grid */
.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}
.highlight-item {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 1.25rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    color: var(--ink);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Leadership */
.leadership-content ul {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    list-style: none;
}
.leadership-content li {
    padding: 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    color: var(--muted);
    font-size: 1rem;
}

/* Contact */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h2 { font-size: 3rem; margin-bottom: 2rem; }
.contact-info p { font-size: 1.2rem; color: var(--muted); margin-bottom: 3rem; }

.contact-card {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 3rem;
    border-radius: var(--radius-lg);
}

.contact-form { display: flex; flex-direction: column; gap: 2rem; }
.form-group { display: flex; flex-direction: column; gap: 0.75rem; }
.form-group label { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); text-transform: uppercase; }
.form-group input, .form-group textarea {
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--ink);
    padding: 1rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-main);
    font-size: 1rem;
    transition: var(--transition-base);
}
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.btn-block { width: 100%; justify-content: center; padding: 1rem; }

/* Footer */
.footer {
    padding: 8rem 2rem 4rem;
    text-align: center;
    color: var(--muted);
    font-size: 0.9rem;
}

.footer-content {
    max-width: 1100px;
    margin: 0 auto;
    border-top: 1px solid var(--border);
    padding-top: 4rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    text-decoration: none;
    color: var(--muted);
    font-size: 0.85rem;
    transition: var(--transition-base);
}

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

@media (max-width: 768px) {
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* Utils */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}
.reveal.active { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

@media (max-width: 1024px) {
    .contact-container { grid-template-columns: 1fr; }
    .hero h1 { font-size: 4rem; }
}

@media (max-width: 768px) {
    .main-content { padding-top: 8rem; }
    .timeline-item { grid-template-columns: 1fr; gap: 1rem; }
    .logos-container { gap: 2rem; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .hero h1 { font-size: 3rem; }
    .section-title { font-size: 2rem; }
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        transition: opacity 0.3s ease-in-out;
        transform: none !important;
    }
}