:root {
  color-scheme: light dark;
  --bg: #fbfaf7;
  --text: #1f2421;
  --muted: #545b57;
  --link: #1d5c8f;
  --panel: #f0ede6;
  --note: #fff4d6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161917;
    --text: #e9ece9;
    --muted: #b2b9b4;
    --link: #8cc4f0;
    --panel: #222724;
    --note: #3a321b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1.0625rem/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 42rem; margin: 0 auto; padding: 2rem 1rem 4rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 1rem; }
h2 { font-size: 1.3rem; margin: 2rem 0 0.5rem; }
a { color: var(--link); }
.muted { color: var(--muted); }
.note { background: var(--note); border-radius: 0.5rem; padding: 0.75rem 1rem; }
.panel { background: var(--panel); border-radius: 0.5rem; padding: 0.75rem 1rem; }
nav { margin-bottom: 1.5rem; }
li { margin: 0.35rem 0; }
.lead { font-size: 1.25rem; font-weight: 600; }
.button {
  display: block;
  min-height: 3rem;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: var(--link);
  color: var(--bg);
  font-weight: 600;
  text-align: center;
  text-decoration: none;
}
@media (min-width: 40rem) {
  .button { display: inline-block; }
}
[hidden] { display: none !important; }