:root {
  --ink: #1b1d21;
  --muted: #5b616b;
  --line: #d9dce1;
  --paper: #ffffff;
  --band: #f4f5f7;
  --accent: #9a3412;
  --quote: #fff8eb;
  --quote-line: #e0a64a;
  --max: 860px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", Arial, sans-serif;
}
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* gate */
.gate { max-width: 420px; margin: 14vh auto 0; padding: 0 16px; text-align: center; }
.gate h1 { font-size: 1.5rem; margin: 0 0 .4rem; }
.gate .sub { color: var(--muted); margin: 0 0 1.4rem; }
.gate form { display: flex; gap: 8px; }
.gate input { flex: 1; min-width: 0; font: inherit; padding: .7rem .8rem; border: 1px solid var(--line); border-radius: 8px; }
.gate button { font: inherit; font-weight: 600; padding: .7rem 1rem; border: 0; border-radius: 8px; background: var(--ink); color: #fff; cursor: pointer; }
.gate button[disabled] { opacity: .6; }
.gate .msg { min-height: 1.6em; color: var(--accent); }
.gate .fine { color: var(--muted); font-size: .85rem; }

/* page */
.page { max-width: var(--max); margin: 0 auto; padding: 24px 16px 64px; }
.top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; border-bottom: 2px solid var(--ink); padding-bottom: 10px; margin-bottom: 8px; }
.top .who { color: var(--muted); font-size: .9rem; }
.top button { font: inherit; font-size: .85rem; background: none; border: 1px solid var(--line); border-radius: 6px; padding: .2rem .6rem; color: var(--muted); cursor: pointer; }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 18px 0 6px; }
.lede { font-size: 1.1rem; color: #33373d; margin: 0 0 18px; }
h2 { font-size: 1.35rem; margin: 44px 0 10px; padding-top: 10px; border-top: 1px solid var(--line); }
h3 { font-size: 1.08rem; margin: 26px 0 6px; }
p { margin: .5rem 0 .8rem; }
.toc { background: var(--band); border-radius: 10px; padding: 12px 16px; margin: 18px 0; }
.toc ol { margin: 4px 0 0; padding-left: 1.2rem; }
.toc a { color: var(--ink); }
.facts { list-style: none; padding: 0; margin: 12px 0; }
.facts li { padding: 10px 12px 10px 14px; border-left: 4px solid var(--accent); background: var(--band); margin: 8px 0; border-radius: 0 8px 8px 0; }
blockquote { margin: 10px 0; padding: 8px 14px; background: var(--quote); border-left: 4px solid var(--quote-line); border-radius: 0 8px 8px 0; }
blockquote .src { display: block; color: var(--muted); font-size: .85rem; margin-top: 4px; }
.table-wrap { overflow-x: auto; margin: 12px 0; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { background: var(--band); font-weight: 600; }
td.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
tr.down td { background: #fff1ef; }
tr.mark td { background: #eef4ff; }
figure { margin: 16px 0 22px; }
figure img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 6px; background: var(--band); min-height: 80px; cursor: zoom-in; }
figcaption { color: var(--muted); font-size: .88rem; margin-top: 6px; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 640px) { .pair { grid-template-columns: 1fr; } h1 { font-size: 1.55rem; } body { font-size: 16px; } }
.note { color: var(--muted); font-size: .9rem; }
.docs { padding-left: 1.2rem; }
.docs li { margin: 4px 0; }
.toc a.dl, a.dl { color: #fff; }
.dl { display: inline-block; margin: 6px 0 2px; padding: .55rem .9rem; border-radius: 8px; background: var(--ink); color: #fff; text-decoration: none; font-weight: 600; }
footer { margin-top: 48px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: .88rem; }

@media print {
  body { font-size: 11.5pt; }
  .top button, .dl, .toc { display: none; }
  h2, h3 { break-after: avoid; }
  figure, blockquote, tr { break-inside: avoid; }
  figure img { border: 0; }
  a { color: inherit; text-decoration: none; }
}