:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --text: #1d2321;
  --muted: #5b6662;
  --accent: #2f7d6d;
  --border: #e3e1da;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121615;
    --surface: #1a201e;
    --text: #e8ece9;
    --muted: #a3ada9;
    --accent: #6cc4b0;
    --border: #2a3230;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; align-items: center; justify-content: space-between; padding-top: 24px; padding-bottom: 8px; }
.brand { font-weight: 700; font-size: 1.25rem; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.brand span { color: var(--accent); }
nav a { color: var(--muted); text-decoration: none; margin-left: 16px; font-size: 0.95rem; }
nav a:hover { color: var(--accent); }
main { padding-top: 24px; padding-bottom: 48px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; letter-spacing: -0.02em; }
h2 { font-size: 1.2rem; margin: 36px 0 8px; }
h3 { font-size: 1.02rem; margin: 20px 0 4px; }
p, li { color: var(--text); }
.lead { font-size: 1.15rem; color: var(--muted); }
.meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 24px; }
a { color: var(--accent); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin: 20px 0; }
ul { padding-left: 1.2em; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; margin: 12px 0; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }
footer { border-top: 1px solid var(--border); padding-top: 16px; padding-bottom: 32px; color: var(--muted); font-size: 0.88rem; }
footer a { color: var(--muted); margin-right: 14px; }