:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --text: #1c1c1c;
  --muted: #5f5f5a;
  --border: #e3e1da;
  --accent: #2f6f4f;
  --accent-contrast: #ffffff;
  --max: 46rem;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141414;
    --surface: #1d1d1d;
    --text: #ececea;
    --muted: #a3a39e;
    --border: #2e2e2c;
    --accent: #7cc49d;
    --accent-contrast: #10241a;
  }
}

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

html { scroll-behavior: smooth; scroll-padding-top: 5rem; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1.0625rem/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
}
.logo {
  font: 700 1.25rem/1 var(--mono);
  color: var(--text);
  text-decoration: none;
}
.logo span { color: var(--accent); }
.site-header nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.site-header nav a:hover { color: var(--text); }

/* Layout */
main { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
section { padding: 3.5rem 0; border-top: 1px solid var(--border); }

h1, h2, h3 { line-height: 1.2; margin: 0; }
h2 {
  font: 600 0.85rem/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 1.5rem;
}
h3 { font-size: 1.05rem; font-weight: 600; }
p { margin: 0 0 1rem; }

/* Hero */
.hero { border-top: 0; padding: 5rem 0 4rem; }
.eyebrow { font-family: var(--mono); color: var(--accent); margin-bottom: 0.5rem; }
.hero h1 { font-size: clamp(2.5rem, 8vw, 4rem); letter-spacing: -0.02em; margin-bottom: 1rem; }
.lead { font-size: 1.25rem; color: var(--muted); max-width: 32rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

.btn {
  display: inline-block;
  padding: 0.7rem 1.2rem;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-contrast);
  font-weight: 600;
  text-decoration: none;
}
.btn:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; color: var(--accent); }

/* Tags */
.tags { list-style: none; padding: 0; margin: 1.5rem 0 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tags li {
  font: 0.85rem/1 var(--mono);
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
}

/* Project cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr)); gap: 1rem; }
.card {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h3 { margin-bottom: 0.5rem; }
.card h3 a { color: var(--text); text-decoration: none; }
.card h3 a:hover { color: var(--accent); }
.card p { font-size: 0.95rem; color: var(--muted); }
.card .meta { font: 0.8rem/1.4 var(--mono); margin: 0; }

/* Timeline */
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding: 0.75rem 0; }
.timeline .when { font: 0.85rem/1.9 var(--mono); color: var(--muted); }
.timeline p { color: var(--muted); margin: 0.25rem 0 0; }
.timeline .stack { font: 0.8rem/1.4 var(--mono); margin-top: 0.4rem; }
.note { margin: 1.25rem 0 0; font-size: 0.9rem; color: var(--muted); font-style: italic; }
@media (max-width: 34rem) {
  .timeline li { grid-template-columns: 1fr; gap: 0.25rem; }
}

/* Contact */
.links { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
.links a { font-weight: 600; }

/* Footer */
.site-footer {
  width: min(calc(var(--max) - 2.5rem), calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card { transition: none; }
}