:root {
  --bg: #fafaf9;
  --fg: #1c1917;
  --muted: #57534e;
  --accent: #0f766e;
  --card: #f0fdfa;
  --border: #e7e5e4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0a09;
    --fg: #f5f5f4;
    --muted: #a8a29e;
    --accent: #2dd4bf;
    --card: #132522;
    --border: #292524;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 48px 20px 64px; }
h1 { font-size: 2.25rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 36px 0 8px; }
a { color: var(--accent); }
code { font-size: 0.9em; background: var(--border); padding: 1px 5px; border-radius: 4px; }
.eyebrow { margin: 0 0 8px; color: var(--muted); font-weight: 600; }
.eyebrow a { text-decoration: none; }
.meta { color: var(--muted); margin: 0 0 28px; font-size: 0.95rem; }
.summary { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 4px 20px; margin: 24px 0; }
.summary h2 { margin-top: 16px; }
ul { padding-left: 22px; }
li { margin: 4px 0; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 8px; background: var(--accent); color: var(--bg); text-decoration: none; font-weight: 600; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }