:root {
  --bg: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --rule: #d2d2d7;
  --accent: #6b6cf6;
  --card: #f5f5f7;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --rule: #38383a;
    --accent: #8b8cff;
    --card: #1c1c1e;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 56px 20px 80px; }
header { display: flex; align-items: center; gap: 16px; margin-bottom: 32px; }
header img { width: 64px; height: 64px; border-radius: 14px; }
header .app { font-weight: 600; font-size: 20px; }
header .by { color: var(--muted); font-size: 15px; }
h1 { font-size: 34px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 22px; letter-spacing: -0.01em; margin: 40px 0 8px; }
h3 { font-size: 17px; margin: 24px 0 4px; }
p, li { color: var(--text); }
.lede { color: var(--muted); font-size: 19px; margin-top: 0; }
.updated { color: var(--muted); font-size: 15px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font: 15px ui-monospace, "SF Mono", Menlo, monospace; background: var(--card); padding: 1px 6px; border-radius: 6px; }
.card { background: var(--card); border-radius: 16px; padding: 4px 20px; margin: 16px 0; }
nav { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--rule); color: var(--muted); font-size: 15px; display: flex; gap: 20px; flex-wrap: wrap; }