:root {
  --bg: #f7f7f5;
  --card: #ffffff;
  --ink: #18181b;
  --muted: #5b5b66;
  --line: #e4e4e0;
  --accent: #1f5fbf;
  --accent-ink: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111215;
    --card: #191b20;
    --ink: #ececf0;
    --muted: #a2a3ad;
    --line: #2a2c33;
    --accent: #6ea2ff;
    --accent-ink: #0b0d12;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; height: 60px; }
.brand { font-weight: 700; letter-spacing: .2px; color: var(--ink); text-decoration: none; }
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 15px; }
nav a:hover, nav a[aria-current="page"] { color: var(--ink); }
main { padding: 48px 0 64px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 12px; text-wrap: balance; }
h2 { font-size: 1.2rem; margin: 36px 0 8px; }
p, li { color: var(--ink); }
.lead { font-size: 1.15rem; color: var(--muted); margin: 0 0 28px; max-width: 60ch; }
.muted { color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px 22px; margin: 24px 0; }
.btn {
  display: inline-block; background: var(--accent); color: var(--accent-ink);
  text-decoration: none; font-weight: 600; padding: 11px 20px; border-radius: 8px;
}
.btn:hover { filter: brightness(1.08); }
.btn:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
ul { padding-left: 22px; }
li { margin: 6px 0; }
a { color: var(--accent); }
footer.site { border-top: 1px solid var(--line); padding: 20px 0 32px; font-size: 14px; color: var(--muted); }
footer.site a { color: var(--muted); margin-right: 16px; }
.updated { font-size: 14px; color: var(--muted); margin-top: -4px; }