:root {
  color-scheme: light dark;
  --bg: #fbfaf8;
  --fg: #1c1b19;
  --muted: #6b6862;
  --line: #e2ded7;
  --card: #ffffff;
  --accent: #3f7d3f;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #e8e6e3;
    --muted: #96938c;
    --line: #2a2e35;
    --card: #1b1e24;
    --accent: #7cc47c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

header {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--fg);
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.925rem;
}

nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }

main { max-width: 60rem; margin: 0 auto; padding: 2rem 1.5rem; }

h1 { font-size: 1.5rem; letter-spacing: -0.02em; margin: 0 0 1.5rem; }
h2 { font-size: 1rem; text-transform: uppercase; letter-spacing: 0.06em;
     color: var(--muted); margin: 0 0 0.75rem; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
}

.card p { margin: 0.35rem 0; }
.muted { color: var(--muted); }