:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --text: #16181d;
  --muted: #5c626e;
  --line: #e2e3e7;
  --accent: #1f6feb;
  --code-bg: #f1f2f4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101216;
    --surface: #171a1f;
    --text: #e8eaed;
    --muted: #9aa1ad;
    --line: #262a31;
    --accent: #6aa6ff;
    --code-bg: #1d2027;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap { max-width: 46rem; margin: 0 auto; padding: 3.5rem 1.25rem 5rem; }
header { border-bottom: 1px solid var(--line); padding-bottom: 2rem; margin-bottom: 2.5rem; }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 .5rem; letter-spacing: -.02em; }
h2 { font-size: 1.3rem; margin: 3rem 0 .85rem; letter-spacing: -.01em; scroll-margin-top: 1.5rem; }
h3 { font-size: 1.02rem; margin: 1.75rem 0 .4rem; }
.lead { color: var(--muted); font-size: 1.06rem; margin: 0; }
nav { margin-top: 1.5rem; display: flex; flex-wrap: wrap; gap: 1.25rem; }
nav a { color: var(--accent); text-decoration: none; font-size: .94rem; }
nav a:hover { text-decoration: underline; }
a { color: var(--accent); }
ul { padding-left: 1.15rem; }
li { margin: .3rem 0; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.25rem 1.4rem;
  margin: 1.25rem 0;
}
.card p:first-child { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }
code {
  background: var(--code-bg);
  padding: .12em .38em;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .89em;
}
dl { margin: 0; }
dt { font-weight: 600; margin-top: 1.1rem; }
dd { margin: .2rem 0 0; color: var(--muted); }
.meta { color: var(--muted); font-size: .9rem; }
.back { display: inline-block; margin-bottom: 1.25rem; font-size: .94rem; }
footer {
  margin-top: 4rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .9rem;
}
footer p { margin: .35rem 0; }
footer a { color: var(--muted); }