:root {
  --bg: #0f1115;
  --surface: #1a1d23;
  --text: #edeff3;
  --muted: #8a909c;
  --soft: #b6bbc4;
  --mint: #3ddc97;
  --mint-ink: #3ddc97;
  --line: #2a2e36;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fa;
    --surface: #ffffff;
    --text: #14161a;
    --muted: #7a808b;
    --soft: #4a505b;
    --mint-ink: #0e7a52;
    --line: #e3e6ea;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 32px; }
header img { width: 44px; height: 44px; border-radius: 11px; }
header a { color: var(--text); text-decoration: none; font-weight: 600; font-size: 20px; }
nav { margin-left: auto; display: flex; gap: 16px; font-size: 14px; }
nav a { color: var(--soft); font-weight: 500; font-size: 14px; }
h1 { font-size: 32px; line-height: 1.2; margin: 0 0 8px; letter-spacing: -0.02em; }
h2 { font-size: 20px; margin: 36px 0 8px; }
h3 { font-size: 16px; margin: 24px 0 4px; }
p, li { color: var(--soft); }
strong { color: var(--text); }
a { color: var(--mint-ink); }
.lead { font-size: 18px; color: var(--soft); }
.meta { color: var(--muted); font-size: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin: 16px 0; }
.pill { display: inline-block; background: var(--mint); color: #0b2e20; border-radius: 999px; padding: 8px 16px; font-weight: 600; text-decoration: none; }
ul { padding-left: 20px; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }