:root {
  --text: #1c1f23;
  --muted: #5b6470;
  --bg: #ffffff;
  --line: #d9dde3;
  --link: #0b4f9e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e6e8eb;
    --muted: #a3acb8;
    --bg: #14171b;
    --line: #2d333b;
    --link: #8bb8f0;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 3rem 1rem 4rem;
}

h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 0.25rem; }
h2 { font-size: 1.2rem; margin: 2.2rem 0 0.5rem; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.subtitle { margin: 0 0 1.5rem; color: var(--muted); font-size: 1.1rem; }
.note { color: var(--muted); }
a { color: var(--link); }
ul { padding-left: 1.2rem; }
li { margin: 0.35rem 0; }
dl { margin: 0; }
dt { font-weight: 600; margin-top: 0.8rem; }
dd { margin: 0; }
code { font: 0.92em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; overflow-wrap: anywhere; }
nav ul { list-style: none; padding: 0; display: flex; gap: 1.5rem; flex-wrap: wrap; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }