:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --ink: #1d2422;
  --muted: #5d6a66;
  --line: #dfe3df;
  --accent: #0f6b5c;
  --accent-ink: #ffffff;
  --accent-soft: #e2f0ec;
  --warn-bg: #fff6e0;
  --warn-line: #e8c46a;
  --infer: #8a5a00;
  --infer-bg: #fbf1dc;
  --bad: #a3361f;
  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131716; --surface: #1b2120; --ink: #e7ece9; --muted: #9aa8a3; --line: #2c3533;
    --accent: #4fc2a8; --accent-ink: #0d1312; --accent-soft: #1d3530;
    --warn-bg: #2d2615; --warn-line: #7a6127; --infer: #f0c46c; --infer-bg: #33291a; --bad: #f08a72;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 var(--font); }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; }
h1 { font-size: clamp(1.6rem, 3.2vw, 2.3rem); letter-spacing: -.01em; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.02rem; }
main { max-width: 1080px; margin: 0 auto; padding: 24px 16px 80px; }

.topbar { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px;
  border-bottom: 1px solid var(--line); background: var(--surface); position: sticky; top: 0; z-index: 5; }
.brand { font-weight: 800; font-size: 1.2rem; color: var(--ink); text-decoration: none; letter-spacing: -.02em; }
.brand span { color: var(--accent); }
.topbar nav { display: flex; gap: 18px; align-items: center; }
.topbar nav a { color: var(--ink); text-decoration: none; }
.linkish { background: none; border: 0; color: var(--ink); font: inherit; cursor: pointer; padding: 0; }
.demo-banner { background: var(--warn-bg); border-bottom: 1px solid var(--warn-line); padding: 8px 20px; font-size: .9rem; }

.hero { margin: 16px 0 24px; max-width: 760px; }
.lede { color: var(--muted); font-size: 1.07rem; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.narrow { max-width: 560px; margin: 40px auto; }
.form { display: grid; gap: 16px; }
.field { display: grid; gap: 6px; }
.label { font-weight: 600; }
.hint { color: var(--muted); font-size: .88rem; margin: 0; }
input[type=url], input[type=text], textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--line);
  border-radius: 8px; font: inherit; background: var(--bg); color: var(--ink); }
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea { resize: vertical; margin-top: 8px; }
.or { text-align: center; color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
details { border: 1px dashed var(--line); border-radius: 8px; padding: 10px 12px; }
summary { cursor: pointer; font-weight: 600; }
.form-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.tester { display: flex; gap: 8px; align-items: center; color: var(--muted); font-size: .88rem; }
.tester input { width: 120px; padding: 6px 8px; }
.btn { border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 8px;
  padding: 9px 16px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-block; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.small { padding: 5px 10px; font-size: .86rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.error { color: var(--bad); margin: 0; }

.steps { list-style: none; padding: 0; margin: 16px 0; display: grid; gap: 10px; }
.steps li { display: flex; gap: 10px; align-items: baseline; color: var(--muted); }
.steps li::before { content: ""; width: 10px; height: 10px; border-radius: 50%; border: 2px solid var(--line); flex: none; transform: translateY(1px); }
.steps li.running { color: var(--ink); font-weight: 600; }
.steps li.running::before { border-color: var(--accent); border-top-color: transparent; animation: spin 0.9s linear infinite; }
.steps li.done { color: var(--ink); }
.steps li.done::before { background: var(--accent); border-color: var(--accent); }
.steps li.error::before { background: var(--bad); border-color: var(--bad); }
.steps .note { color: var(--muted); font-weight: 400; font-size: .86rem; }
@keyframes spin { to { transform: rotate(360deg); } }

.techhead { display: grid; gap: 6px; margin-bottom: 18px; }
.meta { color: var(--muted); }
.pill { display: inline-block; font-size: .78rem; padding: 2px 8px; border-radius: 99px; background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.warns { background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 8px; padding: 10px 14px; margin: 12px 0; font-size: .92rem; }
.warns ul { margin: 0; padding-left: 18px; }

.layout { display: grid; grid-template-columns: 220px 1fr; gap: 28px; align-items: start; }
.toc { position: sticky; top: 76px; display: grid; gap: 6px; font-size: .92rem; }
.toc a { color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--ink); }
.toc .actions { display: grid; gap: 8px; margin-top: 16px; }
section.block { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; margin-bottom: 18px; }
.block-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 10px; }
.points { margin: 0 0 12px; padding-left: 20px; }
.points li { margin: 6px 0; }
.cite { font-size: .74rem; font-weight: 700; color: var(--accent); background: var(--accent-soft); padding: 1px 6px; border-radius: 6px;
  text-decoration: none; margin-left: 4px; white-space: nowrap; }
.infer { font-size: .72rem; font-weight: 700; color: var(--infer); background: var(--infer-bg); padding: 1px 6px; border-radius: 6px; margin-left: 4px; white-space: nowrap; }
.readability { color: var(--muted); font-size: .85rem; }

.cands { display: grid; gap: 10px; }
.cand { border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; display: grid; grid-template-columns: 1fr auto; gap: 8px 14px; }
.cand.yes { border-color: var(--accent); background: var(--accent-soft); }
.cand.no { opacity: .55; }
.cand .t { font-weight: 600; }
.cand .s { color: var(--muted); font-size: .88rem; }
.cand .why { font-size: .82rem; color: var(--muted); }
.choice { display: flex; gap: 6px; align-items: start; }
.choice button[aria-pressed=true] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.choice button.no[aria-pressed=true] { background: var(--bad); border-color: var(--bad); color: #fff; }
.sticky-foot { position: sticky; bottom: 0; background: var(--bg); padding: 14px 0; display: flex; justify-content: flex-end; gap: 10px; border-top: 1px solid var(--line); margin-top: 18px; }

.tea { border-left: 4px solid var(--accent); padding-left: 14px; }
.tea.not_covered { border-left-color: var(--line); }
.qgroup { margin-top: 14px; }
.q .why { color: var(--muted); font-size: .88rem; display: block; }
.barrier-cat { font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 700; margin-right: 6px; }
.outreach { white-space: pre-wrap; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 14px; font-size: .95rem; }
.sources { font-size: .9rem; padding-left: 0; list-style: none; display: grid; gap: 6px; }
.sources b { color: var(--accent); margin-right: 6px; }
.fb { display: flex; gap: 6px; align-items: center; color: var(--muted); font-size: .82rem; }
.fb button { background: none; border: 1px solid var(--line); border-radius: 6px; cursor: pointer; padding: 2px 8px; color: var(--ink); }
.fb button.on { background: var(--accent-soft); border-color: var(--accent); }
.fb textarea { margin: 0; font-size: .85rem; }

.recent { margin-top: 28px; }
.recent ul { padding-left: 18px; }
.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.compare-grid .block { margin: 0; }
.compare-row h3 { margin-top: 12px; color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; }
select { font: inherit; padding: 8px; border-radius: 8px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); width: 100%; }
dialog { border: 1px solid var(--line); border-radius: var(--radius); max-width: 560px; background: var(--surface); color: var(--ink); }
dialog::backdrop { background: rgba(0,0,0,.35); }

@media (max-width: 760px) {
  .grid2, .layout, .compare-grid { grid-template-columns: 1fr; }
  .toc { position: static; }
  .cand { grid-template-columns: 1fr; }
}
@media print {
  .topbar, .toc, .fb, .demo-banner, .no-print, .sticky-foot { display: none !important; }
  body { background: #fff; color: #000; }
  main { max-width: none; padding: 0; }
  .layout { display: block; }
  section.block { border: 0; padding: 0; margin: 0 0 18px; break-inside: avoid-page; }
  .cite, .infer { background: none; padding: 0; }
  a { color: #000; }
}