/* mobile.css — Wave 3 D3
 * Mobile single-column layout below 900px. Must NOT regress >= 900px.
 * Personas: Priya (mobile reader), Marcus (mobile sharing).
 */
@media (max-width: 899.98px) {
  body { font-size: 13px; }
  header { padding: 12px 14px; gap: 10px; }
  header h1 { font-size: 16px; }
  main { padding: 12px 14px; gap: 12px; }
  .card.big, .card { padding: 12px; }

  .row, .row.cols-2, .row.cols-3, .row.cols-4 { grid-template-columns: 1fr; gap: 12px; }

  .hero { display: flex; flex-direction: column; gap: 12px; }
  .hero-share { flex-wrap: wrap; }

  /* Filter bar collapses into accordion */
  .fb-bar { padding: 8px 14px; flex-direction: column; align-items: stretch; gap: 6px; }
  .fb-bar .fb-chip { white-space: normal; }
  .fb-bar.cm-collapsed > .fb-chip:not(.cm-mobile-toggle):not(.density-chip) { display: none; }
  .fb-chip.cm-mobile-toggle { display: inline-flex; justify-content: space-between; align-items: center; }
  .fb-chip.density-chip { margin-left: 0 !important; }

  /* Heatmap 16:9 aspect */
  #heatmap { aspect-ratio: 16/9; width: 100%; }
  #heatmap > svg, #heatmap > canvas { width: 100% !important; height: 100% !important; }

  /* Tables → card lists per row */
  table.cm-mobile-cards thead { display: none; }
  table.cm-mobile-cards, table.cm-mobile-cards tbody, table.cm-mobile-cards tr,
  table.cm-mobile-cards th, table.cm-mobile-cards td { display: block; width: 100%; }
  table.cm-mobile-cards tr {
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 8px;
    padding: 8px 10px;
    background: var(--panel2);
  }
  table.cm-mobile-cards td { border: none; padding: 4px 0; display: flex; justify-content: space-between; gap: 8px; }
  table.cm-mobile-cards td::before {
    content: attr(data-label);
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .4px;
    flex: 0 0 40%;
  }
  table.cm-mobile-cards td.num { text-align: right; }

  /* Hide keyboard shortcut hint bar (if any) */
  .kbd-hint, [data-kbd-hint], .keyboard-shortcuts, .kbd-bar { display: none !important; }

  /* Compact cumulative chart legend & gauge */
  .hero-gauge-wrap svg { max-width: 100%; height: auto; }

  /* Footer */
  .footer { padding: 12px; }
}

/* Tap-and-hold sheet (native <dialog>) — global, but only triggered on touch devices. */
dialog#cmTapSheet {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel);
  color: var(--text);
  padding: 0;
  width: min(380px, 92vw);
  box-shadow: 0 10px 30px #000a;
}
dialog#cmTapSheet::backdrop { background: rgba(0,0,0,.55); }
dialog#cmTapSheet .cm-sheet-head {
  padding: 12px 14px; border-bottom: 1px solid var(--border); font-weight: 600;
}
dialog#cmTapSheet .cm-sheet-body {
  display: flex; flex-direction: column; gap: 6px; padding: 12px 14px;
}
dialog#cmTapSheet .cm-sheet-body button {
  background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 12px; font-size: 14px; cursor: pointer; font-family: inherit;
  text-align: left;
}
dialog#cmTapSheet .cm-sheet-body button:hover { border-color: var(--accent); color: var(--accent); }
dialog#cmTapSheet .cm-sheet-foot {
  padding: 10px 14px; border-top: 1px solid var(--border); text-align: right;
}