:root {
  --bg: #ffffff;
  --text: #16181d;
  --muted: #5b6270;
  --line: #e6e8ec;
  --accent: #0f9d7a;
  --card: #f6f8fa;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d10;
    --text: #e8eaee;
    --muted: #9aa3b2;
    --line: #232833;
    --accent: #2fd3a6;
    --card: #12161c;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/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: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
nav a { color: var(--muted); text-decoration: none; margin-left: 14px; font-size: 14px; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }
h1 { font-size: 30px; line-height: 1.25; margin: 32px 0 4px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
h2 { font-size: 20px; margin: 32px 0 8px; padding-top: 8px; border-top: 1px solid var(--line); }
h3 { font-size: 16px; margin: 20px 0 6px; }
p, li { color: var(--text); }
ul { padding-left: 22px; }
li { margin: 4px 0; }
a { color: var(--accent); }
.note { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; margin: 16px 0; }
table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }
footer { color: var(--muted); font-size: 13px; padding-top: 24px; padding-bottom: 40px; border-top: 1px solid var(--line); margin-top: 40px; }
@media (max-width: 520px) {
  header { flex-direction: column; align-items: flex-start; gap: 8px; }
  nav a { margin: 0 12px 0 0; }
  h1 { font-size: 26px; }
}