.sp-lab { padding:22px 18px 0; --sp-bg:var(--wash,#eeeee6); }
.sp-lab * { box-sizing:border-box; }
.sp-lab [hidden] { display:none!important; }
.sp-lab button,.sp-lab input { font:inherit; }
.sp-header { display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom:18px; }
.sp-header h2 { margin:0; font:400 28px/1.2 var(--serif,Georgia); }
.sp-lab .sp-reset { border:0; background:transparent; padding:8px 0; min-height:40px; font-size:11px; color:var(--sl-muted); cursor:pointer; }
.sp-tabbar { display:flex; border-block:1px solid var(--sl-line); }
.sp-tabbar button { flex:1; min-height:48px; border:0; border-bottom:2px solid transparent; background:transparent; color:var(--sl-muted); cursor:pointer; font-size:13px; }
.sp-tabbar button[aria-selected=true] { color:var(--sl-ink); border-bottom-color:var(--sl-ink); }
.sp-tools { display:flex; align-items:center; flex-wrap:wrap; gap:10px; padding:16px 0; min-height:78px; }
.sp-tools button { border:1px solid var(--sl-line); border-radius:3px; background:transparent; padding:9px 15px; min-height:44px; color:var(--sl-ink); font-size:12px; cursor:pointer; touch-action:none; }
.sp-tools button:hover { background:var(--sp-bg); }
.sp-tools button[aria-pressed=true] { background:var(--sl-ink); color:var(--paper,#f8f5f0); border-color:var(--sl-ink); }
.sp-tools .sp-input { color:var(--sl-gold); border-color:var(--sl-gold); }
.sp-tools .sp-output { color:var(--sl-rose); border-color:var(--sl-rose); }
.sp-tools .sp-new { margin-left:auto; border-color:transparent; color:var(--sl-muted); }
.sp-stiffness { display:flex; align-items:center; gap:10px; flex:1; min-width:160px; font-size:12px; color:var(--sl-muted); }
.sp-stiffness input { flex:1; width:90px; accent-color:var(--sl-teal); cursor:ew-resize; }
.sp-stiffness .sp-k { font-size:11px; min-width:42px; font-variant-numeric:tabular-nums; }
.sp-toggles { gap:28px; }
.sp-toggles label,.sp-legend label { display:inline-flex; gap:7px; align-items:center; min-height:38px; cursor:pointer; }
.sp-toggles label { font-size:13px; }
.sp-lab input[type=checkbox] { accent-color:var(--sl-teal); width:16px; height:16px; }
.sp-workbench { display:grid; grid-template-columns:minmax(0,1fr) 150px; gap:18px; align-items:start; }
.sp-network { min-width:0; border:1px solid var(--sl-line); border-radius:3px; background:var(--sp-bg); }
.sp-canvas { display:block; width:100%; height:375px; cursor:pointer; touch-action:none; }
.sp-legend { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:0 8px; padding:0 10px 4px; color:var(--sl-muted); font-size:9px; }
.sp-legend input[type=checkbox] { width:13px; height:13px; }
.sp-readouts { min-width:0; display:grid; gap:22px; padding-top:10px; font-size:11px; }
.sp-total { display:grid; gap:4px; color:var(--sl-muted); }
.sp-total strong { color:var(--sl-ink); font:400 30px/1.2 var(--serif,Georgia); overflow-wrap:anywhere; }
.sp-rank { font-size:10px; }
.sp-spring-info { display:grid; gap:12px; }
.sp-selected { color:var(--sl-muted); font-size:10px; }
.sp-meter-row { display:grid; gap:5px; font-size:10px; }
.sp-bar { position:relative; display:block; height:8px; background:var(--sp-bg); border:1px solid var(--sl-line); border-radius:2px; }
.sp-bar > i { display:block; height:100%; background:var(--sl-teal); border-radius:1px; }
.sp-bar > .sp-jiggle-fill { background:var(--sl-gold); }
.sp-jiggle-fill[data-overflow=true] { background:var(--sl-rose); }
.sp-meter-row b { font-size:10px; font-weight:400; font-variant-numeric:tabular-nums; }
.sp-room { color:var(--sl-teal); }
.sp-meter-title { display:flex; justify-content:space-between; gap:4px; margin-bottom:8px; font-size:11px; }
.sp-room-bar { height:10px; background:var(--sp-bg); border:1px solid var(--sl-line); border-radius:2px; }
.sp-room-bar > i { display:block; height:100%; background:var(--sl-teal); border-radius:1px; }
.sp-response-track { height:12px; position:relative; border-bottom:1px solid var(--sl-line); margin:8px 5px; }
.sp-response-target { position:absolute; left:30%; bottom:-5px; height:20px; width:10%; background:color-mix(in srgb,var(--sl-teal) 23%,transparent); transform:translateX(-50%); border-radius:2px; }
.sp-response-dot { position:absolute; left:50%; bottom:-4px; width:8px; height:8px; transform:translateX(-50%); border-radius:50%; background:var(--sl-rose); }
.sp-response[data-learned=true] .sp-response-dot { background:var(--sl-teal); }
.sp-response-labels { display:flex; justify-content:space-between; gap:6px; color:var(--sl-muted); font-size:9px; }
.sp-response-status { min-height:18px; margin-top:6px; font-size:10px; color:var(--sl-teal); }
.sp-debug { font-size:9px; color:var(--sl-muted); line-height:1.8; overflow-wrap:anywhere; }
.sp-lab[data-values=false] .sp-number { display:none; }
.sp-error { padding:12px 0; font-size:12px; color:var(--sl-rose); }
.sp-challenges { margin-top:22px; border-top:1px solid var(--sl-line); }
.sp-explanation { border-top:1px solid var(--sl-line); }
.sp-lab details summary { min-height:44px; padding:13px 0; font-size:11px; color:var(--sl-muted); cursor:pointer; }
.sp-lab details p,.sp-lab details li { color:var(--sl-muted); font-size:12px; line-height:1.75; margin:7px 0 15px; }
.sp-lab details ul { padding-left:20px; }
@container sleep-lab (max-width:520px) {
 .sp-workbench { grid-template-columns:1fr; gap:12px; }
 .sp-readouts { grid-template-columns:repeat(2,minmax(0,1fr)); padding:5px 0 10px; gap:16px 22px; }
 .sp-readouts .sp-total strong { font-size:26px; }
 .sp-canvas { height:320px; }
 .sp-lab { padding:20px 12px 0; }
 .sp-tools { gap:8px; }
 .sp-tools button { padding:9px 11px; }
 .sp-stiffness { min-width:155px; }
 .sp-toggles { gap:24px; }
}
@media(prefers-reduced-motion:reduce) { .sp-lab * { scroll-behavior:auto; } }
.sp-tools .sp-input[aria-pressed=true] { color:var(--sl-gold); background:color-mix(in srgb,var(--sl-gold) 10%,transparent); box-shadow:0 0 0 1px var(--sl-gold); }
.sp-tools .sp-output[aria-pressed=true] { color:var(--sl-rose); background:color-mix(in srgb,var(--sl-rose) 10%,transparent); box-shadow:0 0 0 1px var(--sl-rose); }

.sp-context { margin:0 0 3px!important; color:var(--sl-muted); font-size:11px!important; }
.sp-lab .sp-reset { white-space:nowrap; flex-shrink:0; }
.sp-header h2 { min-width:0; }
/* Physical targets stay next to their springs; numbers remain optional. */
.sp-lab .sp-reset { padding:8px 10px; border:1px solid var(--sl-line); border-radius:3px; color:var(--sl-ink); }
.sp-tools .sp-train,.sp-tools .sp-push { border-color:var(--sl-teal); background:color-mix(in srgb,var(--sl-teal) 12%,transparent); }
.sp-tools .sp-repeat { margin-left:auto; color:var(--sl-muted); font-size:11px; }
.sp-trial-status { font-size:10px; color:var(--sl-muted); min-width:75px; }
.sp-toggles { gap:18px; }
.sp-canvas { height:350px; }
.sp-lens { border-top:1px solid var(--sl-line); padding:10px 14px 2px; display:grid; grid-template-columns:110px minmax(0,1fr); align-items:center; gap:10px; }
.sp-lens-title { font-size:11px; color:var(--sl-rose); }
.sp-lens-title span { display:block; font-size:9px; margin-top:4px; color:var(--sl-muted); }
.sp-lens svg { display:block; width:100%; max-width:340px; height:88px; overflow:visible; }
.sp-lens svg text { fill:var(--sl-muted); font:10px var(--sans,system-ui); }
.sp-lens svg path { fill:none; stroke-width:2; stroke-linecap:round; stroke-linejoin:round; }
.sp-current-coil { stroke:var(--sl-rose); }
.sp-goal-coil { stroke:var(--sl-teal); stroke-dasharray:3 3; }
.sp-target-ghost { stroke:var(--sl-teal); opacity:.3; stroke-dasharray:3 3; }
.sp-target-line { stroke:var(--sl-teal); stroke-width:1; stroke-dasharray:3 3; opacity:.6; }
.sp-goal-band { fill:var(--sl-teal); opacity:.12; }
.sp-response-track,.sp-response-labels { position:absolute; width:1px; height:1px; overflow:hidden; clip-path:inset(50%); }
.sp-room-bar { position:relative; }
.sp-room-start,.sp-room-previous { position:absolute; top:-3px; width:1px; height:15px; background:var(--sl-ink); }
.sp-room-previous { width:2px; background:var(--sl-rose); }
.sp-previous-caption { display:block; min-height:16px; font-size:9px; color:var(--sl-muted); margin-top:7px; }
.sp-meter-row small { display:block; font-size:9px; font-weight:400; color:var(--sl-muted); margin-top:3px; }
.sp-share-fill { background:var(--sl-gold)!important; }
.sp-lab:focus-visible,.sp-lab button:focus-visible,.sp-lab input:focus-visible,.sp-canvas:focus-visible { outline:2px solid var(--sl-teal); outline-offset:3px; }
@container sleep-lab (max-width:520px) {
 .sp-lens { grid-template-columns:80px minmax(0,1fr); padding:8px; gap:4px; }
 .sp-lens svg { height:auto; }
 .sp-toggles { gap:10px 16px; }
 .sp-trial-status { min-width:60px; }
 .sp-canvas { height:300px; }
}

.sp-response[data-learned=false] .sp-response-status { color:var(--sl-rose); }