:root {
    --ink: #141d24; --paper: #f2f5f7; --panel: #e7edf0; --line: #c9d4da;
    --muted: #5a6b75; --accent: #1f7a8c; --accent-ink: #f2f5f7;
    --allow: #2e7d4f; --gated: #b3741b; --deny: #ac3e2c;
    --mono: "SF Mono", "Cascadia Code", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
    --body: system-ui, "Segoe UI", Seravek, Ubuntu, Cantarell, sans-serif;
  }
  @media (prefers-color-scheme: dark) {
    :root { --ink:#dce6eb; --paper:#12191f; --panel:#1a242c; --line:#2c3a44;
      --muted:#8fa1ac; --accent:#4fa8ba; --accent-ink:#0e1519; }
  }
  :root[data-theme="dark"] { --ink:#dce6eb; --paper:#12191f; --panel:#1a242c; --line:#2c3a44;
    --muted:#8fa1ac; --accent:#4fa8ba; --accent-ink:#0e1519; }
  :root[data-theme="light"] { --ink:#141d24; --paper:#f2f5f7; --panel:#e7edf0; --line:#c9d4da;
    --muted:#5a6b75; --accent:#1f7a8c; --accent-ink:#f2f5f7; }

  body { background: var(--paper); color: var(--ink); font-family: var(--body);
    line-height: 1.55; margin: 0; }
  main { max-width: 76ch; margin: 0 auto; padding: 2.5rem 1.25rem 5rem; }
  h1, h2, h3 { font-family: var(--mono); text-wrap: balance; line-height: 1.2; }
  h1 { font-size: 1.7rem; margin: .3rem 0 .4rem; }
  h2 { font-size: 1.15rem; margin: 2.8rem 0 .8rem; padding-top: 1.2rem; border-top: 1px solid var(--line); }
  h3 { font-size: .95rem; margin: 1.4rem 0 .4rem; }
  p, li { max-width: 70ch; }
  .eyebrow { font-family: var(--mono); font-size: .7rem; letter-spacing: .14em;
    text-transform: uppercase; color: var(--accent); }
  .lede { font-size: 1.05rem; color: var(--muted); max-width: 64ch; }
  .meta { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.1rem 0 0; }
  .chip { font-family: var(--mono); font-size: .72rem; border: 1px solid var(--line);
    border-radius: 3px; padding: .2rem .55rem; background: var(--panel); }
  .chip b { color: var(--accent); font-weight: 600; }
  .scroll { overflow-x: auto; background: var(--panel); border: 1px solid var(--line);
    border-radius: 4px; padding: .9rem; margin: 1rem 0; }
  pre.mermaid { margin: 0; display: flex; justify-content: center; background: transparent; }
  table { border-collapse: collapse; width: 100%; font-size: .88rem; }
  th { font-family: var(--mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase;
    text-align: left; color: var(--muted); border-bottom: 2px solid var(--line); padding: .45rem .6rem; }
  td { border-bottom: 1px solid var(--line); padding: .5rem .6rem; vertical-align: top; }
  td:first-child { font-family: var(--mono); font-size: .82rem; white-space: nowrap; }
  code { font-family: var(--mono); font-size: .85em; background: var(--panel);
    border: 1px solid var(--line); border-radius: 3px; padding: .05em .3em; }
  .g-allow { color: var(--allow); font-weight: 600; }
  .g-gated { color: var(--gated); font-weight: 600; }
  .g-deny  { color: var(--deny);  font-weight: 600; }
  ol.phases { counter-reset: p; list-style: none; padding-left: 0; }
  ol.phases > li { counter-increment: p; margin: .9rem 0; padding-left: 3.2rem; position: relative; }
  ol.phases > li::before { content: "P" counter(p); position: absolute; left: 0; top: .1rem;
    font-family: var(--mono); font-size: .8rem; font-weight: 700; color: var(--accent-ink);
    background: var(--accent); border-radius: 3px; padding: .1rem .45rem; }
  ul { padding-left: 1.2rem; }
  li { margin: .35rem 0; }
  .footer { margin-top: 3.5rem; padding-top: 1rem; border-top: 1px solid var(--line);
    font-size: .8rem; color: var(--muted); font-family: var(--mono); }
  a { color: var(--accent); }