:root{color-scheme:light;--as-bg:#f7f3ec;--as-card:#fff;--as-ink:#222a55;--as-text:#4a5070;--as-muted:#625f77;--as-line:#e8e1d5;--as-focus:#2f6fe4;--blush:#f3d3dc;--mint:#dcf2e8;--lilac:#e9e0f6;--blue:#d9eafa;--font:system-ui,-apple-system,'Segoe UI',sans-serif}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;background:var(--as-bg);color:var(--as-text);font:16px/1.55 var(--font)}button,input,select,textarea{font:inherit;color:var(--as-ink)}button,select{min-height:44px;border:1px solid #cbc5d1;border-radius:12px;background:white;padding:9px 13px;cursor:pointer}button:hover{background:var(--lilac)}button:disabled{cursor:default;opacity:.5}button[aria-pressed=true]{background:var(--lilac);border-color:#8975ac}a{color:#395c92}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--as-focus);outline-offset:3px}.wrap{max-width:1440px;margin:auto;padding:24px}.skip{position:absolute;top:-80px;background:#fff;padding:12px;z-index:10}.skip:focus{top:8px}.apphead{display:flex;align-items:center;gap:16px}.back{text-decoration:none;background:white;border-radius:50%;width:44px;height:44px;display:grid;place-items:center;color:var(--as-ink)}.eyebrow{text-transform:uppercase;letter-spacing:.11em;font-size:11px;font-weight:650;color:var(--as-muted)}h1,h2,h3{color:var(--as-ink);line-height:1.15}h1{font-size:clamp(28px,4vw,46px);font-weight:550;letter-spacing:-.035em;margin:5px 0}h2{font-size:28px;margin:8px 0 16px}h3{margin:0 0 10px}h3 span{font-size:12px;font-weight:400}.pill{margin-left:auto;font-size:12px;border:1px solid var(--as-line);padding:7px 12px;border-radius:50px;background:white}.intro{margin:20px 0}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:24px 0 14px}.steps button{text-align:left;border-color:var(--as-line);color:var(--as-muted);display:flex;gap:14px;padding:14px 18px}.steps button[aria-current=step]{background:var(--lilac);border-color:#9b88b6;color:var(--as-ink)}.bench{display:grid;grid-template-columns:minmax(0,1fr) 330px;background:white;border:1px solid var(--as-line);border-radius:24px;overflow:hidden}.visual-column{min-width:0;padding:18px 22px 14px}.benchbar{display:flex;justify-content:space-between;gap:12px}.benchbar label{font-size:12px;font-weight:600}.benchbar select{display:block;font-size:14px;margin-top:5px;max-width:100%}#stage{height:590px;position:relative;isolation:isolate}#three,#diagram{position:absolute;inset:0}#three canvas{width:100%;height:100%;display:block;touch-action:none}#diagram svg{width:100%;height:100%;display:block}.marker{position:absolute;transform:translate(-50%,-50%);font-size:11px;padding:3px 7px;background:#fffdf5ed;border:1px solid #d8cede;border-radius:7px;color:var(--as-ink);pointer-events:none;white-space:nowrap}.viewbar,.buttons{display:flex;flex-wrap:wrap;gap:7px}.viewbar button{font-size:13px}.small{font-size:12px;line-height:1.55;margin:10px 0}.legend{display:flex;flex-wrap:wrap;gap:8px 24px;font-size:13px}.legend i{display:inline-block;width:12px;height:12px;border:1px solid #778398;border-radius:50%;margin-right:5px}.blue{background:#bdd8ef}.blush{background:#eab6c3}.structure{display:flex;align-items:center;gap:12px;font-size:13px}.structure select{min-width:0;max-width:100%;flex:1;font-size:13px}.dock{background:#faf8fc;padding:24px;border-left:1px solid var(--as-line)}.dock label{display:flex;flex-wrap:wrap;gap:4px;justify-content:space-between;font-size:14px;font-weight:600;margin-top:22px}.dock output{font-weight:500}input[type=range]{width:100%;height:34px;margin:4px 0;accent-color:#8b679d}.hint{font-size:12px;color:var(--as-muted);margin:0 0 12px}.readout{background:var(--mint);border:1px solid #c1dbd2;padding:18px;border-radius:18px;margin:20px 0 12px}.readout>span{font-size:13px}.readout strong{display:block;font-size:40px;font-weight:500;color:var(--as-ink);line-height:1.35}.readout small{font-size:18px}.readout p{margin:0;font-size:13px}.phasebox{border-top:1px solid var(--as-line);margin-top:20px}.phasebox strong{font-size:17px;display:block}.phasebox p{font-size:12px}.phasebox button{font-size:12px}.learning{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:22px 0}.activity,.evidence{background:white;border:1px solid var(--as-line);border-radius:22px;padding:28px;min-width:0}.topic-note{padding:14px 16px;background:#f3edf9;border-radius:12px;font-size:14px;margin:18px 0}.activity label{display:block;font-weight:600;font-size:14px}textarea{width:100%;resize:vertical;background:#fffcf7;border:1px solid #cec6d6;border-radius:12px;padding:12px;margin:8px 0;min-height:100px}.activity .buttons{margin-top:20px}.capture-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.capture-grid article{background:#fcf8fa;border:1px solid #e7d9e1;border-radius:14px;padding:16px;min-width:0}.capture-grid p{font-size:14px;white-space:pre-line;overflow-wrap:anywhere}.capture-grid button{font-size:13px;margin-top:5px}.limits,footer{padding:22px 28px;margin-top:16px;border:1px solid var(--as-line);border-radius:20px;background:#fffcf7}.limits summary{font-size:16px;font-weight:600;cursor:pointer;color:var(--as-ink);min-height:44px}.limits p,footer p{font-size:14px;max-width:90ch}#notice{font-size:13px;color:#315d4f}#reset-confirm{padding:14px;border:1px solid #b6a3c7;border-radius:12px}#reset-confirm button{margin:4px}#three[hidden]{display:none}.diagram-caption{font-size:14px}#graphics-status{min-height:20px}footer{margin-bottom:24px}
@media(max-width:1000px){.bench{grid-template-columns:minmax(0,1fr) 290px}.dock{padding:18px}#stage{height:520px}.visual-column{padding:16px}.structure{display:block}.structure select{display:block;width:100%;margin-top:5px}.learning{gap:14px}.activity,.evidence{padding:22px}.capture-grid{grid-template-columns:1fr}}
@media(max-width:760px){.wrap{padding:14px}.apphead{gap:10px}.pill{display:none}.intro{font-size:15px}.steps{gap:5px}.steps button{padding:10px 5px;gap:4px;display:grid;text-align:center;font-size:11px}.steps b{font-size:13px}.bench{grid-template-columns:1fr;border-radius:18px}.visual-column{padding:13px}.benchbar{gap:8px}.benchbar label{min-width:0;flex:1}.benchbar select{width:100%;font-size:12px;padding:8px}#stage{height:420px}.dock{border-left:0;border-top:1px solid var(--as-line);padding:20px}.learning{grid-template-columns:1fr}.activity,.evidence{padding:20px}.capture-grid{grid-template-columns:1fr 1fr}.capture-grid article{padding:12px}.limits,footer{padding:18px}.readout strong{font-size:38px}.marker{font-size:10px;padding:2px 4px}.legend{font-size:12px;gap:6px 10px}.viewbar{gap:6px}.viewbar button{font-size:12px;padding:8px 10px}}
@media(max-width:350px){.wrap{padding:10px}.visual-column{padding:10px}#stage{height:390px}.capture-grid{grid-template-columns:1fr}.benchbar select{font-size:11px}.steps b{font-size:12px}.marker{font-size:9px}.viewbar button{padding:8px;font-size:11px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

.marker{z-index:2}.marker-leader{position:absolute;height:1px;background:#7a7a91;pointer-events:none;z-index:1}

/* Compact mobile investigation: the same controls move beside the scene. */
.mobile-activity,.near-captures,#phase-preset{display:none}
@media(max-width:760px){
 .wrap{padding-top:12px}.intro{margin:12px 0}.steps{margin:14px 0 10px}
 .mobile-activity{display:block;background:#f3edf9;border-radius:12px;padding:10px 12px;margin-top:10px;font-size:13px;line-height:1.4}
 .mobile-activity .eyebrow{font-size:11px;letter-spacing:.03em}.mobile-activity p{margin:5px 0}.mobile-activity a{font-size:12px}
 #stage{height:340px;margin-top:5px}
 .visual-column>.phasebox{margin:0 0 12px;padding:10px 0 12px;border-top:0;border-bottom:1px solid var(--as-line)}
 .phasebox label{display:flex;justify-content:space-between;font-size:13px;font-weight:600}.phasebox strong{font-size:15px}.phasebox p{margin:4px 0 8px}.phasebox .buttons{display:grid;grid-template-columns:1fr 1fr}.phasebox .phase-preset{display:none}#phase-preset{display:block;font-size:12px;padding:8px}.phasebox #motion-note{margin-bottom:0;font-size:11px}
 .visual-column>.dock{border:1px solid var(--as-line);border-radius:14px;padding:14px;margin-bottom:14px}.dock label{margin-top:12px}.dock .hint{margin-bottom:8px}.readout{margin:12px 0 8px;padding:12px}.readout strong{font-size:32px}
 .near-captures{display:block;border-top:1px solid var(--as-line);padding-top:10px;font-size:13px}.near-captures p{margin:4px 0 10px}.near-captures a{font-size:12px}.capture-actions{display:flex;gap:5px;flex-wrap:wrap}.near-captures .capture-actions{flex:1}.near-captures button{flex:1;padding:8px;font-size:13px}#near-comparison{margin-top:10px}
 .capture-grid{grid-template-columns:1fr}.capture-grid article{padding:16px}
 .marker{font-size:13px;line-height:1.2;padding:5px 6px;max-width:102px;white-space:normal;text-align:center;background:#fff;border-color:#81768e;box-shadow:0 1px 3px #222a551a}.marker-leader{background:#53516b}
}
@media(max-width:760px){
 /* Keep the anatomy in view while scrubbing phase or capturing pump settings. */
 .bench{overflow:visible}.visual-column{min-width:0}
 #stage{position:sticky;top:0;z-index:4;background:white;border-radius:12px}
}
@media(max-width:760px){.marker{width:max-content;max-width:110px}}
@media(max-width:760px){
 html{scroll-padding-top:350px}
 .phasebox input,.phasebox button,.phasebox select,.dock input,.dock button{scroll-margin-top:0}
 .near-captures .capture-actions{flex-direction:column}.near-captures button{width:100%}
}