:root {
  --bg: #ffffff;
  --fg: #1b1c1d;
  --muted: #5d6166;
  --accent: #0a8fb8;
  --line: #e3e5e8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1c1d;
    --fg: #f2f3f4;
    --muted: #a6abb1;
    --accent: #1fd0ff;
    --line: #34373a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; color: var(--fg); text-decoration: none; }
main { padding-top: 24px; padding-bottom: 48px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0.5em 0; }
h2 { font-size: 1.3rem; margin-top: 2em; }
h3 { font-size: 1.05rem; margin-bottom: 0.25em; }
a { color: var(--accent); }
.meta { color: var(--muted); font-size: 0.9rem; }
.hero { text-align: center; padding: 32px 0; }
.hero img { border-radius: 22%; }
.lead { font-size: 1.15rem; color: var(--muted); }
.button {
  display: inline-block; padding: 12px 22px; border-radius: 999px;
  background: var(--accent); color: #0b0c0d; font-weight: 700; text-decoration: none;
}
code { font-size: 0.9em; }
footer { border-top: 1px solid var(--line); padding-top: 20px; padding-bottom: 32px; color: var(--muted); font-size: 0.85rem; }
footer nav { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 8px; }