/* Sim demo components, scoped under .simdemo so the demo can sit inside the project page.
   The page supplies the tokens (--bg, --panel, --ink, --muted, --line, --accent, --safe, --good, --bad,
   --stage-top, --stage-bot, --font-*). */
.simdemo [hidden] { display: none !important; }
/* The stage's aspect ratio alone sets the height; the rail is pinned beside it and scrolls.
   (A stretched rail with height:0/min-height:100% collapsed the whole row in Safari.) */
.simdemo .demo { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 14px; align-items: start; }
@media (max-width: 900px) { .simdemo .demo { grid-template-columns: minmax(0, 1fr); } }
.simdemo .stage {
  position: relative; border-radius: 10px; overflow: hidden; border: 1px solid var(--line);
  background: linear-gradient(var(--stage-top), var(--stage-bot));
  aspect-ratio: 16 / 11; max-width: 100%; touch-action: none; user-select: none;
}
@media (max-width: 900px) { .simdemo .stage { aspect-ratio: 4 / 3.4; } }
.simdemo .stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
/* start screen: a still of the running sim, the play button over it */
.simdemo .poster { position: absolute; inset: 0; display: grid; place-content: center; justify-items: center; gap: 8px; text-align: center;
  padding: 24px; background: center / cover no-repeat; cursor: pointer; }
.simdemo .poster::before { content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--panel) 55%, transparent), transparent); }
.simdemo .poster > * { position: relative; }
.simdemo .poster p { margin: 0; color: var(--muted); max-width: 46ch; }
.simdemo .poster .cta { font: 600 19px/1.2 var(--font-display); color: var(--ink); }
.simdemo .poster .big { width: 78px; height: 78px; border-radius: 50%; border: 0; background: var(--accent); color: var(--panel);
  display: grid; place-items: center; cursor: pointer; box-shadow: 0 6px 24px color-mix(in srgb, var(--accent) 40%, transparent);
  transition: transform .15s; }
.simdemo .poster .big svg { width: 34px; height: 34px; fill: currentColor; margin-left: 4px; }
.simdemo .poster:hover .big { transform: scale(1.06); }
.simdemo .poster .big:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }
.simdemo .progress { width: min(320px, 70vw); height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; justify-self: center; }
.simdemo .progress > i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .15s; }
.simdemo .hud { position: absolute; left: 10px; top: 10px; right: 10px; display: flex; flex-wrap: wrap; gap: 6px; pointer-events: none;
  font: 12px/1.3 var(--font-mono); font-variant-numeric: tabular-nums; }
.simdemo .chip { background: color-mix(in srgb, var(--panel) 86%, transparent); border: 1px solid var(--line); border-radius: 6px; padding: 4px 8px; color: var(--ink); }
.simdemo .chip b { font-weight: 500; }
.simdemo .chip.filter-on { border-color: var(--safe); color: var(--safe); }
.simdemo .chip.paused { border-color: var(--muted); }
.simdemo .chip.speed { border-color: var(--bad); color: var(--bad); }
.simdemo .hint { position: absolute; left: 10px; bottom: 10px; right: 10px; font: 12px var(--font-body); color: var(--muted); pointer-events: none; }
/* control rail: collapsible groups; beside the view it is exactly as tall as the view and scrolls inside */
.simdemo .rail { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; display: flex; flex-direction: column;
  position: absolute; top: 0; right: 0; bottom: 0; width: 330px; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
@media (max-width: 900px) { .simdemo .rail { position: static; width: auto; overflow: visible; } }
.simdemo .rail details { border-top: 1px solid var(--line); }
.simdemo .rail details:first-child { border-top: 0; }
.simdemo .rail details[open] { padding-bottom: 12px; }
.simdemo .rail details > :not(summary) { margin: 8px 14px 0; }
.simdemo .rail summary { list-style: none; cursor: pointer; padding: 11px 14px; display: flex; align-items: center; gap: 8px;
  font: 600 11px/1 var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.simdemo .rail summary::-webkit-details-marker { display: none; }
.simdemo .rail summary::after { content: ""; margin-left: auto; width: 7px; height: 7px; border: solid var(--muted); border-width: 0 1.5px 1.5px 0;
  rotate: 45deg; translate: 0 -2px; transition: rotate .15s; }
.simdemo .rail details[open] > summary::after { rotate: -135deg; translate: 0 2px; }
.simdemo .rail summary:hover { color: var(--ink); }
.simdemo .rail summary:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.simdemo .rail summary .val { font: 500 11px var(--font-mono); letter-spacing: 0; text-transform: none; color: var(--muted); }
.simdemo .meter-row { display: grid; grid-template-columns: 70px minmax(0, 1fr) 40px; align-items: center; gap: 8px; font-size: 13px; }
.simdemo .meter-row span { color: var(--muted); }
.simdemo .meter-row output { font: 12px var(--font-mono); text-align: right; }
.simdemo .seg { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.simdemo .seg button { border: 0; background: transparent; color: var(--ink); font: 500 13px var(--font-body); padding: 7px 4px; cursor: pointer; }
.simdemo .seg button + button { border-left: 1px solid var(--line); }
.simdemo .seg button[aria-pressed="true"] { background: var(--accent); color: var(--panel); }
.simdemo .row { display: flex; flex-wrap: wrap; gap: 6px; }
.simdemo .btn { border: 1px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 7px; padding: 6px 10px; font: 500 13px var(--font-body); cursor: pointer; }
.simdemo .btn:hover { border-color: var(--accent); }
.simdemo .btn:focus-visible, .simdemo .seg button:focus-visible, .simdemo input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.simdemo .btn kbd { font: 11px var(--font-mono); color: var(--muted); margin-left: 4px; }
.simdemo .btn[disabled] { opacity: .45; cursor: default; }
.simdemo .presets { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.simdemo .presets .btn { padding: 5px 4px; font-size: 12px; }
.simdemo .presets .btn[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }
.simdemo .slider { display: grid; grid-template-columns: 54px minmax(0, 1fr) 78px; align-items: center; gap: 8px; font-size: 13px; }
.simdemo .slider label { color: var(--muted); }
.simdemo .slider output { font: 12px var(--font-mono); text-align: right; font-variant-numeric: tabular-nums; }
.simdemo input[type=range] { width: 100%; accent-color: var(--accent); }
.simdemo .safe input[type=range] { accent-color: var(--safe); }
.simdemo .switch { display: flex; align-items: center; justify-content: space-between; gap: 10px; font-size: 14px; }
.simdemo .switch input { appearance: none; width: 40px; height: 22px; border-radius: 11px; background: var(--line); position: relative; cursor: pointer; flex: none; transition: background .15s; }
.simdemo .switch input::after { content: ""; position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; border-radius: 50%; background: var(--panel); transition: left .15s; }
.simdemo .switch input:checked { background: var(--safe); }
.simdemo .switch input:checked::after { left: 21px; }
.simdemo .meter { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; }
.simdemo .meter > i { display: block; height: 100%; width: 0; background: var(--safe); }
.simdemo .note { margin: 0; font-size: 12.5px; color: var(--muted); }
.simdemo .dial-ticks { position: relative; height: 14px; margin: -4px 78px 0 62px; font: 10px var(--font-mono); color: var(--muted); }
.simdemo .dial-ticks span { position: absolute; transform: translateX(-50%); white-space: nowrap; }
.simdemo .stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.simdemo .stat { border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; }
.simdemo .stat span { display: block; font-size: 11px; color: var(--muted); }
.simdemo .stat b { font: 500 16px var(--font-mono); font-variant-numeric: tabular-nums; }
.simdemo .hold { height: 4px; background: var(--line); border-radius: 2px; overflow: hidden; }
.simdemo .hold > i { display: block; height: 100%; width: 0; background: var(--good); }