:root {
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6b6b70;
  --accent: #7c3aed;
  --border: #e6e6ea;
  --card: #f7f7f9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111114;
    --fg: #ececf0;
    --muted: #9a9aa3;
    --accent: #a78bfa;
    --border: #2a2a30;
    --card: #1a1a1f;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 40px 16px 64px; }
header { margin-bottom: 32px; }
.brand { color: var(--accent); font-weight: 700; letter-spacing: .04em; text-decoration: none; }
h1 { font-size: 2rem; line-height: 1.2; margin: 8px 0 4px; }
h2 { font-size: 1.25rem; margin: 36px 0 8px; }
h3 { font-size: 1.05rem; margin: 24px 0 6px; }
.meta { color: var(--muted); font-size: .95rem; }
.summary { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; }
.summary ul { margin: 8px 0 0; padding-left: 20px; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; vertical-align: top; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
a { color: var(--accent); }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--border); color: var(--muted); font-size: .9rem; }
footer a { margin-right: 16px; }