/* The Lab: index and simulation pages. Loaded only there; tokens come from site.css. */

/* Index */
.lab-hero{display:flex;flex-wrap:wrap;gap:48px;align-items:flex-end;padding-top:96px;padding-bottom:48px}
.search{position:relative}
.search .icon{position:absolute;left:14px;top:15px;color:var(--muted)}
.search .field{height:48px;padding-left:44px;max-width:480px}
.lab-toolbar{border-bottom:1px solid var(--line)}
.lab [data-view]{display:none}
.lab[data-mode=grid] [data-view=grid],.lab[data-mode=list] [data-view=list],.lab[data-mode=detail] [data-view=detail]{display:block}
.lab[data-mode=grid] .sgrid,.lab[data-mode=detail] .sdet{display:grid}
.dom{padding:48px var(--gutter) 64px;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:24px}
.dom-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:16px}
.dom-head h2{display:flex;align-items:baseline;gap:16px;font-size:28px;letter-spacing:-.01em}
.th{display:block;width:100%;height:auto;aspect-ratio:1;border-radius:4px;background:#000;object-fit:cover;flex:none}
.sgrid{grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:32px 16px}
.scard{display:flex;flex-direction:column;gap:12px}
.scard .th{border:1px solid var(--line);transition:border-color .15s}
.scard:hover .th{border-color:var(--accent)}
.scard .t{font-size:15px;line-height:1.35}
.srow{display:grid;grid-template-columns:64px minmax(0,1fr) minmax(0,2fr) 168px;gap:24px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}
.srow:first-child{border-top:1px solid var(--line)}
.srow .t{font-size:16px}
.srow .muted{font-size:15px;line-height:1.5}
.srow:hover .t{color:var(--accent)}
.sdet{grid-template-columns:repeat(auto-fill,minmax(min(100%,560px),1fr));gap:16px}
.sdcard{display:grid;grid-template-columns:200px minmax(0,1fr);gap:24px;padding:16px;border:1px solid var(--line);border-radius:4px}
.sdcard:hover{border-color:var(--accent)}
.sdcard .t{font-size:20px;letter-spacing:-.01em}
.sdcard .muted{font-size:15px;line-height:1.5}
.sfacts{display:grid;grid-template-columns:repeat(3,auto);justify-content:start;gap:4px 32px}
.sfacts dd{font-size:14px}
.lab-empty{padding-top:96px;padding-bottom:96px;align-items:flex-start;border-bottom:1px solid var(--line)}

/* Simulation page */
.h1{font-size:clamp(32px,3.6vw,48px);line-height:1.1;letter-spacing:-.02em}
.num{font-family:var(--mono);font-size:12px;color:var(--text);font-variant-numeric:tabular-nums}
.sim-title{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px;padding-top:32px;padding-bottom:24px}
.sim{display:flex;flex-wrap:wrap;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stage{flex:3 1 640px;min-width:0;display:flex;flex-direction:column;border-right:1px solid var(--line)}
.screen{position:relative;height:clamp(360px,64vh,720px);background:#000;overflow:hidden}
.screen canvas,.screen>.th{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;border-radius:0;background:transparent}
.sim:not([data-status=running]):not([data-status=stopped]) canvas{visibility:hidden}
.sim[data-status=running] .screen>.th,.sim[data-status=stopped] .screen>.th{display:none}
.veil{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:16px;padding:24px;text-align:center;background:rgba(15,17,16,.72);color:var(--text)}
:root[data-theme=light] .veil{background:rgba(244,245,242,.8)}
.sim [data-show]{display:none}
.sim[data-status=loading] [data-show=loading],.sim[data-status=error] [data-show=error]{display:flex}
.sim[data-status=stopped] [data-show=stopped]{display:flex}
.bar{width:240px;height:2px;background:var(--line);border-radius:1px;overflow:hidden}
.bar span{display:block;height:100%;width:40%;background:var(--accent);animation:slide 1.2s ease-in-out infinite}
@keyframes slide{from{transform:translateX(-100%)}to{transform:translateX(250%)}}
.stopped{position:absolute;left:16px;right:16px;top:16px;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;padding:12px 16px;border:1px solid var(--danger);border-radius:4px;background:var(--bg);font-size:14px;line-height:1.5}
.danger{color:var(--danger)}
.metrics{display:flex;flex-wrap:wrap;border-top:1px solid var(--line)}
.metric{flex:1 1 220px;display:flex;flex-direction:column;gap:8px;padding:16px 24px;min-width:0}
.metric+.metric{border-left:1px solid var(--line)}
.mhead{display:flex;justify-content:space-between;gap:16px}
/* Engine labels carry symbols (λ₁, Φ) that uppercase would change. */
.mhead .mono{text-transform:none}
.metric svg{display:block;width:100%;height:40px}
.controls{flex:1 1 320px;padding:32px;display:flex;flex-direction:column;gap:24px}
.transport{display:flex;flex-wrap:wrap;gap:8px}
.transport .btn{height:44px}
.transport [data-play] span{display:inline-flex}
[data-play][aria-pressed=true] .i-off,[data-play][aria-pressed=false] .i-on{display:none!important}
.params{border:0;margin:0;padding:0;min-width:0;display:flex;flex-direction:column;gap:24px}
.params[disabled]{opacity:.45}
.presets{display:flex;flex-wrap:wrap;gap:8px}
.controls details{border-top:1px solid var(--line)}
.controls summary{list-style:none;display:flex;justify-content:space-between;align-items:center;min-height:48px;cursor:pointer}
.controls summary::-webkit-details-marker{display:none}
.controls summary .icon{transition:transform .15s}
.controls details[open] summary .icon{transform:rotate(180deg)}
.grp{display:flex;flex-direction:column;gap:20px;padding:4px 0 24px}
.row{display:flex;flex-direction:column;gap:8px}
.rhead{display:flex;justify-content:space-between;align-items:baseline;gap:16px;font-size:14px}
.controls input[type=range]{width:100%;margin:0;accent-color:var(--accent)}
.controls .field{height:44px;padding:0 12px;font-size:14px}
.controls select.field{padding-right:40px;background-position:right 12px center}
.hint{font-size:14px;line-height:1.5;color:var(--muted)}
.tog{display:flex;align-items:center;gap:12px;min-height:44px;cursor:pointer;font-size:14px}
.tog input{width:20px;height:20px;margin:0;accent-color:var(--accent)}
.sfacts2{display:grid;grid-template-columns:auto 1fr;gap:8px 16px;border-top:1px solid var(--line);padding-top:24px}
.sfacts2 dd{font-size:14px}
.physics{min-width:0}
.physics .eq{font-size:18px;padding:24px;border:1px solid var(--line);border-radius:4px;background:var(--surface);overflow-x:auto;color:var(--text)}
.physics math{font-family:math;color:var(--text)}
.physics strong{font-weight:500;color:var(--text)}
.related{padding-top:64px;padding-bottom:64px}
.rgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:24px}
.rgrid .t{font-size:16px}

@media (max-width:760px){
  .srow{grid-template-columns:56px minmax(0,1fr)}
  .sdcard{grid-template-columns:96px minmax(0,1fr);gap:16px}
  .sgrid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}
  .chips{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
  .stage{border-right:0}
  .screen{height:auto;aspect-ratio:1}
  .metric+.metric{border-left:0;border-top:1px solid var(--line)}
  .controls{padding:24px var(--gutter)}
}
@media (prefers-reduced-motion:reduce){.bar span{animation:none;width:100%}}