:root {
  --bg: #f6f7f9; --card: #ffffff; --text: #16181d; --muted: #5b6270; --line: #e3e6eb;
  --accent: #1f9d55; --accent2: #2563eb;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1115; --card: #171a21; --text: #eceef2; --muted: #9aa3b2; --line: #2a2f3a; --accent: #34c46e; --accent2: #5b8cff; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.logo { width: 44px; height: 44px; border-radius: 11px; background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 22px; }
header a { color: inherit; text-decoration: none; font-weight: 700; font-size: 20px; }
h1 { font-size: 30px; line-height: 1.2; margin: 8px 0 4px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
h3 { font-size: 16px; margin: 20px 0 4px; }
p, li { color: var(--text); }
.muted { color: var(--muted); font-size: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px; margin: 16px 0; }
.summary li { margin: 4px 0; }
a { color: var(--accent2); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
footer a { margin-right: 16px; }