:root {
  color-scheme: light dark;
  --bg: #fafaf8;
  --fg: #1c1c1a;
  --muted: #63635c;
  --accent: #2f7d5c;
  --border: #e4e3dd;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15150f;
    --fg: #f1f1ec;
    --muted: #a7a79c;
    --accent: #6fd6a4;
    --border: #2c2c24;
    --card: #1d1d15;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main {
  max-width: 640px;
  margin: 0 auto;
  padding: 3rem 1.25rem 5rem;
}
h1 { font-size: 1.75rem; margin: 0 0 .25rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 .5rem; }
p { color: var(--fg); }
.tagline { color: var(--muted); margin: 0 0 2rem; }
a { color: var(--accent); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin: 1rem 0;
}
nav.links { display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; margin-top: 1.5rem; }
.notice {
  background: var(--card);
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  color: var(--muted);
  font-size: .95rem;
  margin-bottom: 2rem;
}
footer { color: var(--muted); font-size: .85rem; margin-top: 3rem; }
code { background: var(--card); border: 1px solid var(--border); border-radius: 4px; padding: .1em .4em; }