:root {
    --bg: #0b0d10;
    --bg-elev: #14171c;
    --fg: #e5e7eb;
    --fg-dim: #9aa3af;
    --accent: #5eead4;
    --accent-dim: #2dd4bf;
    --border: #1f242c;
    --max: 1100px;
}

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

html { font-size: 16px; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg);
    color: var(--fg);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dim); }

/* Header */
.site-header {
    border-bottom: 1px solid var(--border);
    padding: 1.25rem 0;
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand {
    color: var(--fg);
    font-weight: 600;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
}
.brand-dot { color: var(--accent); }
.site-nav a {
    color: var(--fg-dim);
    margin-left: 1.5rem;
    font-size: 0.95rem;
}
.site-nav a:hover, .site-nav a.active { color: var(--fg); }

/* Hero */
.hero {
    padding: 6rem 0 5rem;
    border-bottom: 1px solid var(--border);
}
.hero h1 {
    font-size: 2.75rem;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 1.25rem;
}
.hero-sub {
    font-size: 1.15rem;
    color: var(--fg-dim);
    max-width: 38rem;
    margin-bottom: 2rem;
}
.cta {
    display: inline-block;
    background: var(--accent);
    color: var(--bg);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    transition: background 0.15s;
}
.cta:hover { background: var(--accent-dim); color: var(--bg); }

/* Page hero (subpages) */
.page-hero {
    padding: 4rem 0 2.5rem;
    border-bottom: 1px solid var(--border);
}
.page-hero h1 {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}
.page-sub {
    color: var(--fg-dim);
    margin-top: 0.5rem;
}

/* Features */
.features {
    padding: 5rem 0;
    border-bottom: 1px solid var(--border);
}
.features h2 {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    color: var(--fg-dim);
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}
.feature-card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.75rem;
}
.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.6rem;
}
.feature-card p {
    color: var(--fg-dim);
    font-size: 0.95rem;
}

/* Prose (about page) */
.prose {
    padding: 3rem 0 5rem;
}
.prose h2 {
    font-size: 1.4rem;
    margin: 2.5rem 0 0.75rem;
    color: var(--fg);
    font-weight: 600;
}
.prose h2:first-child { margin-top: 0; }
.prose p {
    color: var(--fg-dim);
    max-width: 42rem;
    margin-bottom: 1rem;
    font-size: 1.02rem;
}

/* Contact section */
.contact {
    padding: 4rem 0 5rem;
}
.contact h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--fg-dim);
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}
.contact p {
    color: var(--fg-dim);
    margin-bottom: 0.5rem;
}
.email {
    color: var(--fg);
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.95rem;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 0;
    color: var(--fg-dim);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 640px) {
    .hero { padding: 3.5rem 0 3rem; }
    .hero h1 { font-size: 2rem; }
    .hero-sub { font-size: 1rem; }
    .site-header .container { flex-direction: column; gap: 0.75rem; align-items: flex-start; }
    .site-nav a:first-child { margin-left: 0; }
}