:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --ink: #1b1d21;
  --ink-soft: #55595f;
  --line: #e4e1dc;
  --accent: #2f6f6b;
  --accent-soft: #eaf2f1;
  --warn-bg: #fdf4e7;
  --warn-line: #e8d5b0;
  --max: 46rem;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161a;
    --surface: #1c1f24;
    --ink: #f2f1ef;
    --ink-soft: #a8adb5;
    --line: #2c3037;
    --accent: #7fc4bd;
    --accent-soft: #1d2a29;
    --warn-bg: #2a2317;
    --warn-line: #4a3c22;
  }
}
:root[data-theme="dark"] {
  --bg: #14161a; --surface: #1c1f24; --ink: #f2f1ef; --ink-soft: #a8adb5;
  --line: #2c3037; --accent: #7fc4bd; --accent-soft: #1d2a29;
  --warn-bg: #2a2317; --warn-line: #4a3c22;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
.wrap { max-width: var(--max); margin: 0 auto; padding: 16px 16px 72px; }
header { border-bottom: 1px solid var(--line); margin-bottom: 40px; padding-block: 28px 20px; }
.brand { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.brand strong { font-size: 1.25rem; letter-spacing: -0.01em; }
.brand span { color: var(--ink-soft); font-size: 0.95rem; }
nav { margin-top: 14px; display: flex; gap: 18px; flex-wrap: wrap; }
nav a { color: var(--accent); text-decoration: none; font-size: 0.95rem; }
nav a:hover, a:hover { text-decoration: underline; }
a { color: var(--accent); }
h1 { font-size: 2rem; line-height: 1.2; letter-spacing: -0.02em; text-wrap: balance; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 44px 0 12px; letter-spacing: -0.01em; text-wrap: balance; }
h3 { font-size: 1.02rem; margin: 26px 0 6px; }
p, li { color: var(--ink); }
.lede { color: var(--ink-soft); font-size: 1.08rem; margin-top: 0; }
.meta { color: var(--ink-soft); font-size: 0.9rem; }
table { border-collapse: collapse; width: 100%; margin: 18px 0; font-size: 0.97rem; display: block; overflow-x: auto; }
th, td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; white-space: nowrap; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; margin: 20px 0; }
.note { background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 12px; padding: 16px 20px; margin: 20px 0; }
.fill { background: var(--accent-soft); border-radius: 10px; padding: 14px 18px; margin: 18px 0; font-size: 0.95rem; }
ul { padding-left: 1.25rem; }
li { margin: 6px 0; }
footer { border-top: 1px solid var(--line); margin-top: 56px; padding-top: 20px; color: var(--ink-soft); font-size: 0.9rem; }
code { background: var(--accent-soft); padding: 1px 6px; border-radius: 5px; font-size: 0.9em; }