:root {
  --bg: #0a0a0a;
  --fg: #eaeaea;
  --accent: #b6ff3d;
  --muted: #7a7a7a;
  --unit: 4px;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}

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

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  height: 100%;
}

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

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: calc(var(--unit) * 6) calc(var(--unit) * 8);
  border-bottom: 1px solid #1c1c1c;
}

.wordmark {
  font-weight: 600;
  letter-spacing: 0.02em;
}

.main-nav {
  display: flex;
  gap: calc(var(--unit) * 6);
  font-size: 0.85rem;
  text-transform: lowercase;
}

.main-nav a { color: var(--muted); transition: color 0.15s ease; }
.main-nav a:hover { color: var(--accent); }

.hero {
  min-height: calc(100vh - 160px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--unit) * 8);
  max-width: 720px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.75rem;
  text-transform: lowercase;
  letter-spacing: 0.04em;
  margin-bottom: calc(var(--unit) * 4);
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 500;
  line-height: 1.25;
  margin-bottom: calc(var(--unit) * 8);
}

.hero-links {
  display: flex;
  gap: calc(var(--unit) * 4);
}

.cta {
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: calc(var(--unit) * 3) calc(var(--unit) * 5);
  font-size: 0.85rem;
  transition: background 0.15s ease, color 0.15s ease;
}

.cta:hover { background: var(--accent); color: #0a0a0a; }

.cta-ghost {
  border-color: #333;
  color: var(--muted);
}

.cta-ghost:hover { background: transparent; color: var(--fg); border-color: var(--fg); }

.site-footer {
  padding: calc(var(--unit) * 6) calc(var(--unit) * 8);
  color: var(--muted);
  font-size: 0.75rem;
  border-top: 1px solid #1c1c1c;
}

/* section pages (/work, /lab) */
.section-header {
  padding: calc(var(--unit) * 8);
}

.section-header a.back {
  color: var(--muted);
  font-size: 0.8rem;
}

.section-header h1 {
  margin-top: calc(var(--unit) * 4);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: calc(var(--unit) * 6);
  padding: 0 calc(var(--unit) * 8) calc(var(--unit) * 12);
}

.tile {
  border: 1px solid #1c1c1c;
  padding: calc(var(--unit) * 5);
  min-height: 160px;
  display: flex;
  align-items: flex-end;
  color: var(--muted);
  font-size: 0.85rem;
  transition: border-color 0.15s ease, color 0.15s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}