:root {
    --bg: #0a0a0a;
    --bg-alt: #111111;
    --surface: #1a1a1a;
    --border: #222222;
    --text: #c8c8c8;
    --text-muted: #666666;
    --accent: #4af626;
    --font: 'SF Mono', 'Fira Code', 'JetBrains Mono', 'Cascadia Code', monospace;
    --mono: 'SF Mono', 'Fira Code', 'JetBrains Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 60px;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Nav */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: 0.05em;
}

.nav-links {
    display: flex;
    gap: 28px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    text-transform: lowercase;
    letter-spacing: 0.05em;
    transition: color 0.2s;
}

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

/* Hero */
.hero {
    padding: 160px 0 100px;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.hero-text {
    flex: 1;
}

.hero-photo img {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border);
    filter: grayscale(100%);
    transition: filter 0.3s, border-color 0.3s;
}

.hero-photo img:hover {
    filter: grayscale(0%);
    border-color: var(--accent);
}

.hero-greeting {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.hero-name {
    font-size: clamp(1.8rem, 4.5vw, 2.6rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 12px;
    color: var(--text);
}

.hero-title {
    font-size: 1rem;
    color: var(--accent);
    font-weight: 400;
    margin-bottom: 20px;
    letter-spacing: 0.05em;
}

.hero-tagline {
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 540px;
    line-height: 1.7;
    border-left: 2px solid var(--accent);
    padding-left: 16px;
}

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

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

.section-heading {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 32px;
    color: var(--accent);
}

.section-heading::before {
    content: '// ';
    color: var(--text-muted);
}

/* About */
.about-text {
    font-size: 0.9rem;
    color: var(--text);
    line-height: 1.8;
    margin-bottom: 16px;
}

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

/* Expertise Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 2px;
    padding: 20px;
    transition: border-color 0.2s;
}

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

.card-icon {
    font-size: 1.2rem;
    margin-bottom: 10px;
    opacity: 0.7;
}

.card h3 {
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 0.02em;
    color: var(--text);
}

.card p {
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Contact */
.contact-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 2px;
    color: var(--text);
    text-decoration: none;
    font-size: 0.8rem;
    letter-spacing: 0.03em;
    transition: border-color 0.2s, background 0.2s;
}

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

.contact-link svg {
    flex-shrink: 0;
}

/* Footer */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border);
}

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

/* Responsive */
@media (max-width: 600px) {
    .hero {
        padding: 120px 0 60px;
    }

    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
    }

    .hero-photo img {
        width: 140px;
        height: 140px;
    }

    .hero-tagline {
        border-left: none;
        padding-left: 0;
        border-top: 2px solid var(--accent);
        padding-top: 12px;
    }

    .section {
        padding: 60px 0;
    }

    .nav-links {
        gap: 20px;
    }

    .contact-links {
        flex-direction: column;
    }

    .contact-link {
        justify-content: center;
    }
}