/* Task-oriented navigation and progressive disclosure. */
.primary-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.primary-nav label.active-view { background: var(--gold-dim); border-bottom-color: var(--gold); }
.primary-nav label.active-view span { color: var(--gold); }
.secondary-navigation {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: -8px 0 18px;
}
.secondary-navigation.hidden { display: none !important; }
.secondary-navigation > span { flex: 1 1 280px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.secondary-navigation label { position: relative; display: inline-flex; min-height: 44px; cursor: pointer; align-items: center; padding: 9px 13px; border: 1px solid var(--line-strong); border-radius: var(--r-sm); font-size: 13px; color: var(--text-2); }
.secondary-navigation label input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.secondary-navigation label:has(input:checked) { color: var(--gold); border-color: var(--gold); }
.secondary-navigation label:focus-within { outline: 2px solid var(--gold); outline-offset: 3px; }
.secondary-navigation button { min-height: 44px; }
.header-proof { flex-wrap: wrap; }
.header-proof .text-link { margin-inline-start: 12px; }
.comparison-guide-section { margin: 0 0 24px; }
.comparison-guide-section > h3 { margin: 0 0 12px; color: var(--text); font-size: 20px; }
.comparison-handoff { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 14px 0 10px; }
.comparison-handoff button { min-height: 44px; }
#share-comparison-status { font-size: 12px; color: var(--text-2); overflow-wrap: anywhere; }
#share-comparison-status input { width: min(100%, 560px); min-width: 0; }
.evidence-disclosure { min-width: 0; }
.evidence-disclosure > summary { cursor: pointer; min-height: 44px; padding: 12px 0; font-size: 14px; font-weight: 600; color: var(--text-2); }
.evidence-disclosure[open] > summary { margin-bottom: 15px; }
.evidence-disclosure summary:focus-visible { outline-offset: 3px; }
.provenance-disclosure { border-top: 1px solid var(--line); }
.evidence-disclosure .evidence-provenance { margin-bottom: 0; }
.comparison-section { margin-top: 16px; padding-top: 16px; }
#experiment-panel { min-width: 0; }
#experiment-panel.hidden { display: none !important; }
#system-design { margin-top: 26px; padding: 16px 22px; border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--panel); }
#system-design > summary { cursor: pointer; min-height: 44px; color: var(--text); font-weight: 650; }
.system-paths { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 18px 0; }
.system-paths article { min-width: 0; padding: 18px; border: 1px solid var(--line); border-radius: var(--r-md); background: var(--panel-deep); }
.system-paths h3 { margin: 0 0 10px; color: var(--text); font-size: 17px; }
.system-paths ol { padding-inline-start: 20px; margin: 0; }
.system-paths li { padding: 5px 0; color: var(--text-2); font-size: 13px; line-height: 1.6; }
.system-tradeoffs { display: grid; gap: 14px; }
.system-tradeoffs h3 { margin: 0; font-size: 16px; }
.system-tradeoffs p, .system-caveat { max-width: 92ch; color: var(--muted); font-size: 13px; line-height: 1.65; }
.system-links { display: flex; flex-wrap: wrap; gap: 16px; padding-top: 14px; }
@media (max-width: 650px) {
  .system-paths { grid-template-columns: minmax(0, 1fr); }
  .secondary-navigation > span { flex-basis: 100%; }
  .comparison-handoff > button { flex: 1 1 150px; }
  .primary-nav span { font-size: 13px; }
}