/* dating-flowchart page-specific styles (verbatim; loaded after site.css). */
  /* Page-specific styles. The shared core CSS is injected above from
     index.html by build/build.py (between the SHARED-CSS markers). */

  /* ── Flowchart panel ──────────────────────────────────────
     The chart itself is black-on-white (so it survives grayscale
     printing), so it sits on a white panel against the dark page. */
  .chart-figure { margin: 0.5rem 0 0; }
  .chart-btn {
    display: block; width: 100%; padding: 0; cursor: zoom-in;
    background: #fff; border: 1px solid var(--border);
    border-radius: var(--radius); overflow: hidden;
    transition: border-color 0.15s;
  }
  .chart-btn:hover { border-color: var(--accent2); }
  .chart-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
  .chart-btn img { display: block; width: 100%; height: auto; }
  .chart-cap { font-size: var(--fs-sm); color: var(--faint); text-align: center; margin-top: 0.55rem; font-style: italic; }

  /* ── Download call-to-action ─────────────────────────────── */
  .dl-cta {
    display: flex; flex-wrap: wrap; align-items: center; gap: 0.85rem 1.1rem;
    background: var(--surface); border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: 1.1rem 1.3rem; margin: 1.5rem 0 0.5rem;
  }
  .dl-btn {
    background: var(--accent); color: #000; text-decoration: none;
    font-family: 'Courier New', monospace; font-size: var(--fs-sm); font-weight: bold;
    letter-spacing: 0.03em; padding: 0.7rem 1.3rem; border-radius: var(--radius);
    min-height: 44px; display: inline-flex; align-items: center; gap: 0.5rem;
    transition: background 0.15s, transform 0.15s; white-space: nowrap;
  }
  .dl-btn:hover { background: var(--accent2); color: #000; text-decoration: none; transform: translateY(-1px); }
  .dl-note { font-size: var(--fs-sm); color: var(--muted); flex: 1; min-width: 220px; }

  /* ── How-to steps (reuses the .fact-card pattern) ────────── */
  .steps-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
  @media (max-width: 700px) { .steps-grid { grid-template-columns: 1fr; } }

  /* ── Type quick-reference cards ──────────────────────────── */
  .ref-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 0.7rem; margin-top: 1rem; }
  .ref-card {
    background: var(--surface); border: 1px solid var(--border);
    border-left: 3px solid var(--accent); border-radius: 0 var(--radius) var(--radius) 0;
    padding: 0.7rem 0.95rem;
  }
  .ref-head { display: flex; align-items: baseline; gap: 0.55rem; margin-bottom: 0.3rem; }
  .ref-num { font-family: 'Courier New', monospace; font-weight: bold; font-size: var(--fs-dense); }
  .ref-yrs { font-family: 'Courier New', monospace; font-size: var(--fs-xs); color: var(--muted); }
  .ref-era { font-size: var(--fs-2xs); font-style: italic; color: var(--faint); margin-left: auto; white-space: nowrap; }
  .ref-tell { font-size: var(--fs-sm); color: var(--muted); line-height: 1.5; margin: 0; }

  /* ── FAQ accordion (same component as identify.html) ─────── */
  .faq-list { display: flex; flex-direction: column; gap: 1rem; }
  .faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
  .faq-q { padding: 1rem 1.25rem; font-size: var(--fs-dense); color: var(--accent2); font-weight: bold; cursor: pointer; user-select: none; display: flex; justify-content: space-between; align-items: center; list-style: none; }
  .faq-q::-webkit-details-marker { display: none; }
  .faq-toggle { font-size: var(--fs-h3); color: var(--faint); transition: transform 0.2s; flex-shrink: 0; }
  details[open] .faq-toggle { transform: rotate(45deg); }
  .faq-a { padding: 0 1.25rem 1rem; font-size: var(--fs-dense); color: var(--muted); border-top: 1px solid var(--border); line-height: 1.7; }
  .faq-a p { margin-top: 0.7rem; margin-bottom: 0; }

  .section-intro { max-width: none; }