:root {
  --bg: #fbfaf7;
  --text: #1c1b19;
  --muted: #55524c;
  --accent: #0b5cad;
  --line: #dedad2;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151412;
    --text: #f1eee8;
    --muted: #b9b4aa;
    --accent: #7ab6f5;
    --line: #36332e;
  }
}
* { box-sizing: border-box; }
html { font-size: 112.5%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}
.wrap { max-width: 44rem; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
header { border-bottom: 1px solid var(--line); padding-bottom: 1rem; }
nav a { font-weight: 600; }
h1 { font-size: 2.2rem; line-height: 1.2; margin: 1.5rem 0 .5rem; }
h2 { font-size: 1.35rem; margin: 2rem 0 .5rem; }
.tagline { font-size: 1.2rem; color: var(--muted); margin: 0; }
a { color: var(--accent); }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
ul { padding-left: 1.3rem; }
footer { border-top: 1px solid var(--line); margin-top: 3rem; padding-top: 1rem; color: var(--muted); font-size: .9rem; }