:root {
  --bg: #fbfbfd;
  --ink: #1b1c20;
  --muted: #5d5f68;
  --rule: #e2e3ea;
  --accent: #2f5bd3;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121317;
    --ink: #e4e5ec;
    --muted: #a4a6b1;
    --rule: #2c2e36;
    --accent: #9db6ff;
    --card: #1a1b21;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 42rem; margin: 0 auto; padding: 2.5rem 1rem 4rem; }
header { margin-bottom: 2rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 .25rem; letter-spacing: -.01em; }
h2 { font-size: 1.15rem; margin: 2.25rem 0 .5rem; }
p, li { overflow-wrap: anywhere; }
ul { padding-left: 1.25rem; }
li + li { margin-top: .35rem; }
a { color: var(--accent); }
.lead { font-size: 1.1rem; color: var(--muted); margin: 0; }
.meta { color: var(--muted); font-size: .9rem; }
.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}
.card p { margin: .25rem 0; }
nav { display: flex; gap: 1.25rem; flex-wrap: wrap; font-size: .95rem; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--rule); color: var(--muted); font-size: .9rem; }