* { box-sizing: border-box; }
  body { font-family: system-ui, sans-serif; margin: 1rem; color: #000; background: #fff; font-size: 15px; line-height: 1.4; }
  header { border: 2px solid #000; padding: 0.7rem 1rem; }
  h1 { font-size: 1rem; font-variant: small-caps; letter-spacing: 0.08em; margin: 0; }
  .incident { font-size: 1.2rem; font-weight: 600; margin: 0.3rem 0 0; }
  .meta { font-size: 0.85rem; color: #333; margin: 0.6rem 0 0; }
  .sheet { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0 1rem; }
  section { border: 1px solid #333; padding: 0.7rem 0.9rem; margin-top: 0.8rem; break-inside: avoid; page-break-inside: avoid; }
  h2 { font-size: 0.85rem; font-variant: small-caps; letter-spacing: 0.06em; margin: 0 0 0.5rem; border-bottom: 1px solid #333; padding-bottom: 0.3rem; }
  p { margin: 0; }
  ul { padding-left: 1.2rem; margin: 0; }
  .table-wrap { overflow-x: auto; }
  table { border-collapse: collapse; width: 100%; font-size: 0.85rem; }
  th, td { border: 1px solid #333; padding: 0.3rem 0.5rem; text-align: left; vertical-align: top; }
  th { font-variant: small-caps; font-weight: 600; }
  .cause-node { font-size: 0.9rem; margin-top: 0.25rem; }
  .check { font-weight: 600; }
  .unverified { color: #555; font-style: italic; font-size: 0.8rem; }
  .evidence { font-size: 0.8rem; color: #222; margin: 0.1rem 0 0.2rem 1.2rem; }
  .evidence .who { color: #555; }
  .provenance { font-size: 0.8rem; color: #333; margin: 0.1rem 0 0.2rem 1.2rem; }
  .history { grid-column: 1 / -1; }
  .investigation { grid-column: 1 / -1; }
  .investigation tr.retracted td { color: #666; text-decoration: line-through; }
  .legend { font-size: 0.75rem; color: #333; margin-top: 0.5rem; }
  .empty { color: #333; font-style: italic; margin: 0; }
  .fishbone { margin-top: 0.6rem; overflow-x: auto; }
  .fishbone svg { width: 100%; min-width: 560px; height: auto; }
  .sig-row { display: flex; gap: 2rem; margin-top: 1.2rem; }
  .sig { flex: 1; }
  .sig .line { border-bottom: 1px solid #000; height: 1.4rem; }
  .sig .lbl { font-size: 0.8rem; margin-top: 0.3rem; }
  footer { font-size: 0.75rem; color: #333; margin-top: 1rem; border-top: 1px solid #333; padding-top: 0.4rem; }
  /* An A3 is one landscape sheet: the problem and its causes on the left, what was done
     about it and whether it held on the right. */
  @media (min-width: 900px) {
    body { margin: 1.5rem; }
    .sheet { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  }
  @page { size: A3 landscape; margin: 1cm; }
  @media print {
    body { margin: 0; font-size: 11px; }
    .sheet { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
    .fishbone svg { min-width: 0; }
    .no-print { display: none; }
  }
.spine { stroke: #111; stroke-width: 2.5; }
      .bone { stroke: #111; stroke-width: 1.5; }
      .head { fill: none; stroke: #111; stroke-width: 1.5; }
      .cat { font-size: 13px; font-weight: 600; }
      .cause { font-size: 10px; }
      .head-text { font-size: 11px; }
      circle.verified { fill: #111; }
      circle.unverified { fill: #fff; stroke: #111; }