:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --border: #dde1e6;
  --text: #16191e;
  --muted: #5b6470;
  --primary: #1f9d6b;
  --primary-ink: #ffffff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0f12;
    --surface: #16191e;
    --border: #252a31;
    --text: #eef0f3;
    --muted: #9aa3ae;
    --primary: #34c08a;
    --primary-ink: #0d0f12;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  padding: 0 16px;
}
header, main, footer { max-width: 720px; margin: 0 auto; }
header { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 20px 0; }
.brand { font-weight: 700; font-size: 20px; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.brand span { color: var(--primary); }
nav { display: flex; gap: 16px; flex-wrap: wrap; }
nav a, footer a { color: var(--muted); text-decoration: none; font-size: 14px; }
nav a:hover, footer a:hover { color: var(--text); }
main { padding: 8px 0 48px; }
h1 { font-size: 32px; line-height: 1.2; letter-spacing: -0.02em; margin: 16px 0 8px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
h3 { font-size: 16px; margin: 24px 0 4px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
a { color: var(--primary); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; margin: 16px 0; }
.lead { font-size: 18px; color: var(--muted); }
.button { display: inline-block; background: var(--primary); color: var(--primary-ink); padding: 10px 18px; border-radius: 10px; text-decoration: none; font-weight: 600; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
footer { border-top: 1px solid var(--border); padding: 20px 0 32px; display: flex; gap: 16px; flex-wrap: wrap; font-size: 14px; color: var(--muted); }