.slab {
  --sl-ink:#263f43; --sl-muted:#637377; --sl-gold:#a46e2e; --sl-teal:#287973; --sl-rose:#a84765; --sl-line:rgba(48,65,70,.15);
  margin-top:28px; color:var(--sl-ink); font:400 14px/1.55 var(--sans,system-ui);
  border:1px solid var(--sl-line); border-radius:18px; background:#f8f5f0; overflow:hidden; box-shadow:0 12px 32px #263f4308;
}
.slab * { box-sizing:border-box; }
.slab [hidden] { display:none!important; }
.slab p { margin:0; font:inherit; }
.slab button,.slab select { color:inherit; font:500 13px/1.4 var(--sans,system-ui); }
.slab button { cursor:pointer; }
.slab button:disabled,.slab select:disabled { cursor:default; opacity:.45; }
.slab :is(button,select,summary):focus-visible { outline:3px solid #bd8b41; outline-offset:4px; }
.sl-head { display:flex; align-items:flex-start; justify-content:space-between; gap:24px; padding:27px 30px 22px; }
.slab h3 { margin:0; font:500 clamp(25px,2.8vw,33px)/1.2 var(--serif,Georgia); }
.sl-sub { margin-top:7px!important; max-width:70ch; color:var(--sl-muted); }
.sl-reset,.sl-undo { padding:6px 0; border:0; background:none; text-decoration:underline; text-underline-offset:4px; white-space:nowrap; }
.sl-reset { margin-top:1px; font-size:12px!important; }

.sl-steps { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:18px; margin:0; padding:0 30px 21px; list-style:none; border-bottom:1px solid var(--sl-line); }
.sl-steps li { display:flex; align-items:center; gap:10px; color:#7b8585; font-size:13px; line-height:1.35; }
.sl-steps li b { display:grid; place-items:center; flex:0 0 27px; height:27px; border:1px solid #cbd0c9; border-radius:50%; font-size:11px; font-weight:500; }
.sl-steps li[data-state=current] { color:var(--sl-ink); font-weight:600; }
.sl-steps li[data-state=current] b { color:#fff; border-color:var(--sl-ink); background:var(--sl-ink); }
.sl-steps li[data-state=done] { color:var(--sl-teal); }
.sl-steps li[data-state=done] b { border-color:#a7c7bb; background:#e3eee5; }

.sl-body { display:grid; grid-template-columns:minmax(0,1.08fr) minmax(0,1fr); }
.sl-network { position:relative; min-width:0; padding:24px 26px 20px; border-right:1px solid var(--sl-line); background:radial-gradient(ellipse at 30% 65%,#d5dfda70,transparent 72%),#f3f1eb; }
.sl-netbar { display:flex; justify-content:space-between; align-items:center; gap:10px; margin-bottom:12px; }
.sl-phase { display:flex; align-items:center; gap:8px; font-size:11px; font-weight:600; letter-spacing:.075em; text-transform:uppercase; }
.sl-dot { display:inline-block; width:7px; height:7px; border-radius:50%; background:#899495; }
.sl-network[data-phase=wake] .sl-dot { background:var(--sl-gold); }
.sl-network[data-phase=sleep] .sl-dot { background:var(--sl-teal); }
.sl-canvas { display:block; width:100%; aspect-ratio:1.05; max-height:460px; }
.sl-legend { display:flex; align-items:center; flex-wrap:wrap; gap:8px; margin-top:12px; color:var(--sl-muted); font-size:11px; }
.sl-gradient { display:inline-block; width:70px; height:5px; border-radius:4px; background:linear-gradient(90deg,#c2cdca,#858fa5,#a56838); }
.sl-motion { margin-left:auto; padding:4px 7px; border:0; background:transparent; font-size:11px!important; text-decoration:underline; text-underline-offset:3px; }
.sl-caption { margin-top:13px!important; max-width:54ch; color:var(--sl-muted); font-size:12px!important; line-height:1.55!important; }
.sl-tooltip { position:absolute; z-index:3; max-width:190px; padding:8px 10px; border-radius:6px; background:var(--sl-ink); color:#fff; font:11px/1.5 var(--sans,system-ui); pointer-events:none; }

.sl-right { min-width:0; padding:27px 30px 25px; }
.sl-eyebrow { margin-bottom:8px!important; color:var(--sl-teal); font-size:11px!important; font-weight:600!important; letter-spacing:.09em; text-transform:uppercase; }
.slab h4.sl-guide-title { margin:0; font:500 clamp(24px,2.5vw,29px)/1.22 var(--serif,Georgia); letter-spacing:-.01em; }
.sl-guide-copy { margin-top:10px!important; color:#4e6569; font-size:15px!important; line-height:1.65!important; }
.sl-action-row { display:flex; align-items:center; flex-wrap:wrap; gap:12px; margin-top:20px; }
.sl-primary { display:inline-flex; align-items:center; justify-content:center; gap:10px; min-height:44px; padding:11px 20px; border:1px solid var(--sl-ink); border-radius:7px; background:var(--sl-ink); color:#fff!important; font-size:14px!important; }
.sl-primary:hover:not(:disabled) { background:#365a5b; border-color:#365a5b; }
.sl-pause { min-height:40px; padding:9px 12px; border:1px solid var(--sl-line); border-radius:7px; background:transparent; }
.sl-progress { height:3px; margin-top:16px; overflow:hidden; border-radius:4px; background:#e3e3dc; }
.sl-progress span { display:block; width:0; height:100%; background:var(--sl-gold); transition:width .12s; }
.sl-progress[data-phase=sleep] span { background:var(--sl-teal); }
.sl-status { min-height:40px; margin-top:10px!important; color:var(--sl-muted); font-size:12px!important; line-height:1.5!important; }
.sl-result { margin-top:16px; padding:13px 15px; border-left:2px solid #73a497; background:#e9efe8; border-radius:0 6px 6px 0; }
.sl-result-title { color:var(--sl-ink); font-size:14px!important; font-weight:600!important; }
.sl-result-copy { margin-top:5px!important; color:#4e6564; font-size:13px!important; line-height:1.6!important; }

.sl-response-box,.sl-capacity-box { margin-top:21px; padding-top:18px; border-top:1px solid var(--sl-line); }
.sl-outcome-heading { display:flex; align-items:baseline; justify-content:space-between; gap:12px; }
.slab .sl-outcome-heading h5 { margin:0; font:600 13px/1.4 var(--sans,system-ui); }
.sl-verdict { color:var(--sl-muted); font-size:12px; text-align:right; }
.sl-verdict[data-held=true] { color:var(--sl-teal); }
.sl-gauge { position:relative; height:7px; margin:23px 7px 12px; border-radius:5px; background:#e3dcd7; }
.sl-target-zone { position:absolute; top:-4px; width:20%; height:15px; border-radius:4px; background:#c4dbcc; transform:translateX(-50%); }
.sl-target-line { position:absolute; top:-8px; height:23px; border-left:1.5px solid #598875; }
.sl-current { position:absolute; top:-4px; width:15px; height:15px; border:2px solid #f8f5f0; border-radius:50%; background:var(--sl-rose); box-shadow:0 0 0 1px var(--sl-rose); transform:translateX(-50%); transition:left .15s; }
.sl-gauge-labels { display:flex; align-items:flex-start; justify-content:space-between; gap:10px; color:var(--sl-muted); font-size:11px; }
.sl-gauge-labels span:last-child { text-align:right; }
.sl-response-note { margin-top:11px!important; color:var(--sl-muted); font-size:12px!important; line-height:1.55!important; }
.sl-capacity { font-size:19px; font-weight:500; white-space:nowrap; }
.sl-capacity-bars { display:grid; gap:11px; margin-top:15px; }
.sl-cap-row { display:grid; grid-template-columns:93px minmax(35px,1fr) 48px; align-items:center; gap:10px; font-size:11px; }
.sl-cap-row>span { color:var(--sl-muted); }
.sl-cap-row>i { display:block; height:6px; overflow:hidden; border-radius:4px; background:#e6e3dc; }
.sl-cap-row>i>i { display:block; width:0; height:100%; border-radius:4px; background:#b0bab4; transition:width .15s; }
.sl-cap-row:nth-child(2)>i>i { background:var(--sl-gold); }
.sl-cap-row:nth-child(3)>i>i { background:var(--sl-teal); }
.sl-cap-row[data-phase=probe]>i>i { background:#b0bab4; }
.sl-cap-row[data-phase=wake]>i>i { background:var(--sl-gold); }
.sl-cap-row[data-phase=sleep]>i>i { background:var(--sl-teal); }
.sl-cap-row b { font-weight:500; text-align:right; font-variant-numeric:tabular-nums; }

.sl-free { border-top:1px solid var(--sl-line); }
.sl-free>summary { width:fit-content; padding:17px 30px; color:var(--sl-ink); font-size:13px; font-weight:500; cursor:pointer; }
.sl-free[open]>summary { padding-bottom:13px; }
.sl-controls { display:flex; align-items:flex-end; flex-wrap:wrap; gap:12px; padding:0 30px; }
.sl-field { display:flex; flex:1 0 140px; flex-direction:column; gap:6px; min-width:0; color:var(--sl-muted); font-size:11px; }
.sl-field select { width:100%; min-height:40px; padding:9px 24px 9px 10px; border:1px solid var(--sl-line); border-radius:6px; background:#fffcf8; }
.sl-wake,.sl-sleep { min-height:40px; padding:9px 16px; border:1px solid currentColor; border-radius:6px; background:transparent; }
.sl-wake { color:var(--sl-gold)!important; }
.sl-sleep { color:var(--sl-teal)!important; }
.sl-controls .sl-undo { min-height:40px; padding-inline:3px; font-size:12px!important; }
.sl-help { margin:13px 30px 0!important; max-width:85ch; color:var(--sl-muted); font-size:12px!important; }
.sl-free-stats { display:flex; align-items:baseline; flex-wrap:wrap; gap:12px 28px; margin:18px 30px 0; color:var(--sl-muted); font-size:12px; }
.sl-free-stats :is(b,strong) { color:var(--sl-ink); font-weight:500; }
.sl-charts { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:26px; padding:21px 30px 0; }
.sl-charts>* { min-width:0; }
.sl-chart-title { display:flex; align-items:baseline; justify-content:space-between; gap:12px; font-size:12px; font-weight:500; }
.sl-chart-title small { color:var(--sl-muted); font-size:10px; font-weight:400; text-align:right; }
.sl-chart { display:block; width:100%; height:auto; margin:8px 0 4px; overflow:visible; }
.sl-chart-key { display:flex; flex-wrap:wrap; gap:14px; margin:2px 30px 19px; color:var(--sl-muted); font-size:11px; }
.sl-chart-key i { display:inline-block; width:14px; margin-right:4px; border-top:2px solid var(--sl-gold); vertical-align:middle; }
.sl-chart-key i.teal { border-color:var(--sl-teal); }
.sl-chart-key i.dashed { border-color:#899397; border-top-style:dashed; }
.sl-foot { padding:0 30px 20px; border-top:1px solid var(--sl-line); }
.sl-foot details { padding-top:15px; color:var(--sl-muted); font-size:12px; }
.sl-foot summary { width:fit-content; color:var(--sl-ink); font-weight:500; cursor:pointer; }
.sl-foot details p { margin-top:13px; max-width:85ch; font-size:12px; line-height:1.65; }
.sl-equation { color:var(--sl-ink); font:400 15px/1.65 var(--serif,Georgia)!important; }
.sl-load-error { padding:25px; color:#923c43; }
.slab .sl-error { color:#923c43; }
.sleep-project { max-width:1260px!important; }
#sleep .project-intro { max-width:83ch; }
.sleep-project .project-question { max-width:none; font-size:clamp(23px,2.5vw,30px); }
.sleep-project .project-contact { margin-top:22px; }

@media(max-width:1000px) {
  .sl-head { padding-inline:24px; }
  .sl-steps { padding-inline:24px; }
  .sl-network { padding:23px 19px 20px; }
  .sl-right { padding:24px 23px; }
  .sl-guide-copy { font-size:14px!important; }
  .sl-gauge-labels { font-size:10px; }
}
@media(max-width:740px) {
  .slab { margin-top:22px; border-radius:14px; }
  .sl-head { gap:14px; padding:22px 20px 20px; }
  .sl-sub { font-size:13px!important; }
  .sl-reset { font-size:11px!important; }
  .sl-steps { gap:11px; padding:0 20px 18px; }
  .sl-steps li { flex-direction:column; align-items:flex-start; gap:8px; font-size:12px; }
  .sl-steps li b { flex-basis:25px; width:25px; height:25px; }
  .sl-body { display:flex; flex-direction:column; }
  .sl-right { display:contents; }
  .sl-body .sl-eyebrow { order:0; margin:23px 22px 8px!important; }
  .sl-body h4.sl-guide-title { order:1; margin:0 22px; }
  .sl-body .sl-guide-copy { order:2; margin:10px 22px 0!important; }
  .sl-body .sl-action-row { order:3; margin:20px 22px 0; }
  .sl-body .sl-progress { order:4; margin:16px 22px 0; }
  .sl-body .sl-status { order:5; margin:10px 22px 18px!important; }
  .sl-network { order:6; padding:20px 20px 18px; border-right:0; border-top:1px solid var(--sl-line); border-bottom:1px solid var(--sl-line); }
  .sl-body .sl-response-box { order:7; margin:21px 22px 0; padding-top:0; border-top:0; }
  .sl-body .sl-capacity-box { order:8; margin:21px 22px 25px; }
  .sl-body .sl-result { order:9; margin:0 22px 25px; }
  .sl-netbar { margin-bottom:8px; }
  .sl-canvas { aspect-ratio:1.15; max-height:390px; }
  .sl-caption { max-width:none; }
  .slab h4.sl-guide-title { font-size:27px; }
  .sl-guide-copy { font-size:15px!important; }
  .sl-primary { flex:1; }
  .sl-gauge-labels { font-size:11px; }
  .sl-controls { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px 10px; padding-inline:20px; }
  .sl-field { min-width:0; }
  .sl-field select { min-width:0; font-size:12px; }
  .sl-controls .sl-undo { justify-self:start; grid-column:1/-1; }
  .sl-free>summary { padding-inline:20px; }
  .sl-help { margin-inline:20px!important; }
  .sl-free-stats { margin-inline:20px; gap:8px 20px; }
  .sl-charts { grid-template-columns:1fr; gap:17px; padding:19px 20px 0; }
  .sl-chart-title small { font-size:10px; }
  .sl-chart-key { margin-inline:20px; }
  .sl-foot { padding-inline:20px; }
  .sl-tooltip { max-width:150px; }
}
@media(prefers-reduced-motion:reduce) {
  .sl-progress span,.sl-current,.sl-cap-row>i>i { transition:none; }
}
@media(max-width:740px) { .sl-action-row { margin-bottom:20px; } }


/* Guided experiments in one material; scoped to avoid earlier explorer layouts. */
.sm-lab { padding:24px 20px 0; }
.sm-head p { margin:10px 0 22px!important; color:var(--sl-muted); font-size:13px!important; }
.sm-tabs { display:flex; gap:0; border-block:1px solid var(--sl-line); }
.sm-tabs button { flex:1; min-height:48px; padding:10px 5px; border:0; border-bottom:2px solid transparent; background:transparent; color:var(--sl-muted); font-size:12px; text-align:left; }
.sm-tabs button span { margin-right:8px; opacity:.6; }
.sm-tabs button[aria-current=step] { border-bottom-color:var(--sl-ink); color:var(--sl-ink); }
.sm-instruction { padding:22px 0 16px; min-height:115px; }
.sm-lab .sm-instruction h4 { margin:0 0 9px; font:400 24px/1.25 var(--serif,Georgia); }
.sm-instruction p { color:var(--sl-muted); font-size:13px!important; line-height:1.65!important; max-width:65ch; }
.sm-stage { background:var(--wash,#efeee6); border:1px solid var(--sl-line); }
.sm-stage-top { display:flex; justify-content:space-between; align-items:center; min-height:34px; padding:7px 12px 0; color:var(--sl-muted); font-size:10px; }
.sm-motion { border:0; background:transparent; color:var(--sl-muted); min-width:32px; min-height:30px; }
.sm-canvas { display:block; width:100%; height:350px; touch-action:none; cursor:crosshair; }
.sm-canvas:active { cursor:grabbing; }
.sm-legend { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:8px; padding:5px 12px 0; color:var(--sl-muted); font-size:10px; }
.sm-key { color:var(--sl-gold); white-space:nowrap; }
.sm-key i { display:inline-block; width:16px; border-top:2px solid currentColor; margin-right:5px; vertical-align:middle; }
.sm-canvas-hint { padding:9px 12px 12px; color:var(--sl-muted); font-size:11px!important; }
.sm-observation { display:grid; grid-template-columns:1fr 1.2fr; gap:20px; padding:18px 0; }
.sm-bond { display:flex; flex-direction:column; gap:4px; }
.sm-bond-name { color:var(--sl-muted); font-size:10px; }
.sm-reading { font:400 27px/1.2 var(--serif,Georgia); color:var(--sl-rose); }
.sm-reading-label { font-size:11px; line-height:1.5; color:var(--sl-muted); }
.sm-explanation { font-size:12px!important; line-height:1.65!important; align-self:center; }
.sm-actions { display:flex; flex-wrap:wrap; align-items:center; gap:14px; padding:0 0 16px; }
.sm-lab .sm-main { min-height:44px; padding:10px 18px; border:1px solid var(--sl-ink); border-radius:2px; color:var(--sl-ink); background:transparent; font-size:12px; font-weight:400; }
.sm-main:hover:not(:disabled) { background:var(--wash,#efeee6); }
.sm-next,.sm-reset { border:0; background:transparent; padding:10px 0; min-height:44px; color:var(--sl-muted); font-size:11px!important; font-weight:400!important; }
.sm-next:hover,.sm-reset:hover { text-decoration:underline; text-underline-offset:4px; }
.sm-result { min-height:34px; margin:10px 0 14px!important; color:var(--sl-teal); font-size:12px!important; line-height:1.7!important; }
.sm-result:empty { display:none; }
.sm-capacity { display:flex; flex-wrap:wrap; justify-content:space-between; align-items:center; gap:8px; border-top:1px solid var(--sl-line); padding-top:12px; color:var(--sl-muted); font-size:11px; }
.sm-cap-value { color:var(--sl-teal); font-weight:500; font-variant-numeric:tabular-nums; }
.sm-cap-help { border:1px solid var(--sl-line); background:transparent; border-radius:50%; width:20px; height:20px; margin-left:4px; padding:0; color:var(--sl-muted); font-size:10px!important; }
.sm-cap-definition { margin-top:10px!important; font-size:11px!important; color:var(--sl-muted); }
.sm-reset { display:block; }
.sm-details { border-top:1px solid var(--sl-line); }
.sm-details summary { padding:13px 0; min-height:44px; cursor:pointer; color:var(--sl-muted); font-size:12px; }
.sm-details p { margin:8px 0 15px!important; color:var(--sl-muted); font-size:12px!important; line-height:1.75!important; }
@container sleep-lab (max-width:500px) {
 .sm-lab { padding:20px 14px 0; }
 .sm-lab .sm-instruction h4 { font-size:22px; }
 .sm-canvas { height:295px; }
 .sm-observation { gap:15px; grid-template-columns:.85fr 1.15fr; }
 .sm-instruction { min-height:135px; }
}
@media(max-width:600px) {
 .sm-lab { padding:20px 14px 0; }
 .sm-canvas { height:290px; }
 .sm-lab .sm-instruction h4 { font-size:22px; }
}