/* Physical AI labs. Loaded only by /physical-ai/ pages; builds on site.css tokens and lab layout. */
.pai-lab [hidden] { display: none !important; }
.pai-lab .lesson { background: var(--paper); border-left: 4px solid var(--orange); padding: 8px 12px; border-radius: 4px; font-size: 14.5px; }
.pai-lab .api { font-size: 14px; }
.pai-lab .api dl { margin: 6px 0; }
.pai-lab .api dt { margin-top: 8px; }
.pai-lab .api dd { margin: 2px 0 0; color: var(--ink-2); }
.pai-lab .api h3 { font-size: 14px; margin: 12px 0 4px; }
.pai-lab .api pre.obs { font: 12px/1.45 var(--mono); background: var(--paper); border: 1px solid var(--rule); border-radius: 6px; padding: 8px 10px; overflow-x: auto; margin: 0 0 8px; }
.pai-lab .api .facts { padding-left: 1.1em; margin: 6px 0; color: var(--ink-2); }
.pai-lab .api .facts li { margin: 4px 0; }
.pai-lab code { font-family: var(--mono); font-size: .92em; }
.pai-viewport canvas { aspect-ratio: 5 / 3.5; width: 100%; display: block; }
.pai-legend { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 12.5px; color: var(--ink-2); margin: 6px 0 8px; }
.pai-legend span { display: inline-flex; align-items: center; gap: 6px; }
.pai-legend i { display: inline-block; width: 16px; height: 12px; }
.pai-legend .lg-det { border: 1.6px dashed var(--ink); }
.pai-legend .lg-target { border: 2px dashed var(--green); }
.pai-legend .lg-trail { height: 0; border-top: 3px solid var(--cobalt); opacity: .5; }
.pai-telemetry { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.pai-telemetry:empty { display: none; }
.tcard { background: var(--panel); border: 1px solid var(--rule); border-radius: 8px; padding: 6px 10px 8px; min-width: 0; }
.tcard.wide { grid-column: 1 / -1; }
.tcard h4 { margin: 0 0 4px; font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); display: flex; justify-content: space-between; gap: 8px; }
.tcard h4 span { text-transform: none; letter-spacing: 0; font-weight: 500; }
.tcard p { margin: 0; font-size: 14.5px; }
.tcard .mono { font-family: var(--mono); font-weight: 600; overflow-wrap: anywhere; }
.tcard .ret.ok { color: var(--green); }
.tcard .ret.no { color: var(--orange); }
.tcard dl { margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 4px 10px; }
.tcard dt { font-size: 12px; color: var(--ink-3); }
.tcard dd { margin: 0; font-weight: 700; font-variant-numeric: tabular-nums; }
.tcard.truth { background: var(--paper); border-style: dashed; }
.tcard .small, .pai-lab .small { font-size: 12.5px; margin: 4px 0 0; }
.pai-timeline h3 { font-size: 13px; color: var(--ink-3); margin: 12px 0 4px; display: flex; align-items: center; justify-content: space-between; gap: 8px; white-space: nowrap; }
.pai-timeline ol { list-style: none; padding: 0; margin: 0; max-height: 260px; overflow: auto; border: 1px solid var(--rule); border-radius: 8px; background: var(--panel); }
.pai-timeline li { border-bottom: 1px solid var(--rule); }
.pai-timeline li:last-child { border-bottom: 0; }
.pai-timeline li.muted { padding: 8px 10px; font-size: 13.5px; }
.pai-timeline button { width: 100%; text-align: left; background: none; border: 0; font: 13px/1.4 var(--mono); padding: 6px 10px; color: var(--ink); cursor: pointer; display: flex; gap: 8px; align-items: baseline; }
.pai-timeline button:hover, .pai-timeline li[aria-current="true"] button { background: var(--cobalt-2); }
.pai-timeline .ic { width: 1.1em; flex: none; text-align: center; }
.pai-timeline li.bad button { color: var(--orange); font-weight: 600; }
.pai-timeline li.warn button { color: var(--ink-2); }
.pai-timeline .x { color: var(--ink-3); }
.pai-code { display: flex; flex-direction: column; }
.pai-editor { min-height: 360px; display: flex; border-bottom: 1px solid var(--rule); }
.prints { font: 12.5px/1.45 var(--mono); background: var(--paper); margin: 0; padding: 8px 12px; max-height: 160px; overflow: auto; border-bottom: 1px solid var(--rule); white-space: pre-wrap; }
.prints::before { content: 'print() output'; display: block; font: 600 11px var(--font); color: var(--ink-3); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 2px; }
.pai-controls { padding: 12px 14px; overflow: auto; }
.seed-chips { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.seed { text-align: left; border: 1px solid var(--rule); border-radius: 8px; background: var(--panel); padding: 6px 8px; cursor: pointer; display: flex; flex-direction: column; gap: 1px; font: inherit; color: var(--ink); min-height: 44px; }
.seed b { font-size: 12.5px; }
.seed span { font-size: 12px; color: var(--ink-2); }
.seed[aria-pressed="true"] { border-color: var(--cobalt); box-shadow: inset 0 0 0 1px var(--cobalt); }
.seed.pass b::after { content: ' ✓'; color: var(--green); }
.seed.fail b::after { content: ' ✗'; color: var(--orange); }
.seed-about { font-size: 13.5px; color: var(--ink-2); margin: 6px 0; min-height: 1.4em; }
.pai-controls .keys { font-size: 12px; margin: 4px 0 8px; }
.hidden-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; margin: 6px 0 10px; }
.hidden-grid div { background: var(--paper); border-radius: 6px; padding: 6px 8px; }
.hidden-grid small { display: block; font-size: 11.5px; color: var(--ink-3); }
.hidden-grid b { font-size: 18px; font-variant-numeric: tabular-nums; }
.pao { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; margin: 10px 0; }
.pao div { background: var(--panel); border: 1px solid var(--rule); border-radius: 6px; padding: 6px 8px; display: flex; flex-direction: column; gap: 2px; }
.pao b { font-size: 12.5px; color: var(--cobalt); }
.pao span { font-size: 12.5px; color: var(--ink-2); }
.tips { padding-left: 1.1em; font-size: 14px; }
@media (max-width: 1279px) { .hidden-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 900px) {
  .pai-controls .btn { min-height: 44px; }
  .pai-lab .pane-sim { order: 1; }
  .pai-lab .pane-code { order: 2; }
  .pai-lab .pane-brief { order: 3; }
  .pai-editor { min-height: 300px; }
  .pao { grid-template-columns: 1fr 1fr; }
  .tcard dl { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pai-timeline ol { max-height: 200px; }
}
@media (max-width: 420px) { .seed-chips { grid-template-columns: 1fr 1fr; } }