:root {
  --text: #1f2328;
  --muted: #656d76;
  --bg: #ffffff;
  --accent: #0b5cad;
  --border: #d8dee4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e6edf3;
    --muted: #9198a1;
    --bg: #0d1117;
    --accent: #4493f8;
    --border: #30363d;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  max-width: 44rem;
  padding: 0 1rem;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--accent); }

.site-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: baseline;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.site-name {
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}

nav a { margin-left: 1rem; }
nav a:first-child { margin-left: 0; }

main { padding: 2rem 0; }

.site-footer {
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}