:root{--lab-ink:#071722;--lab-panel:#0c2636;--lab-gold:#f4b942;--lab-red:#d9473f;--lab-paper:#f5f1e8;--lab-line:#d9d2c4;--lab-green:#23664d}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{background:linear-gradient(180deg,#eef2f3 0,#f8f6f0 36rem);color:var(--lab-ink)}
button,a,input{font:inherit}
.lab-shell{width:min(1500px,calc(100% - 2rem));margin:0 auto;padding:2rem 0 4rem}
.lab-intro{display:flex;align-items:flex-end;justify-content:space-between;gap:2rem;margin-bottom:1rem}
.lab-intro>div{max-width:850px}.lab-intro .eyebrow{margin:0 0 .35rem;color:#895c00;font-size:.78rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
.lab-intro h1{margin:0;font-family:Fraunces,Georgia,serif;font-size:clamp(2rem,4vw,3.6rem);line-height:1.02}
.lab-intro p:last-child{margin:.75rem 0 0;font-size:1.08rem;line-height:1.6;color:#40505a}
.language-link{flex:0 0 auto;border:1px solid #9b8e78;border-radius:999px;padding:.7rem 1rem;background:#fff;color:var(--lab-ink);font-weight:800;text-decoration:none}
.language-link:hover,.language-link:focus-visible{border-color:var(--lab-red);outline:3px solid rgba(217,71,63,.2)}
.lab-notice{margin:1rem 0 1.25rem;padding:1rem 1.1rem;border-left:5px solid var(--lab-gold);border-radius:.6rem;background:#fff8df;line-height:1.55}
.lab-workspace{overflow:hidden;border:1px solid #c8d1d4;border-radius:1rem;background:#fff;box-shadow:0 20px 55px rgba(7,23,34,.12)}
.scene-tabs{display:flex;gap:.55rem;padding:.85rem;overflow-x:auto;background:var(--lab-panel);scrollbar-width:thin}
.scene-tab{flex:0 0 auto;border:1px solid rgba(255,255,255,.24);border-radius:999px;padding:.7rem 1rem;background:transparent;color:#fff;font-size:.92rem;font-weight:800;cursor:pointer}
.scene-tab:hover,.scene-tab:focus-visible{border-color:var(--lab-gold);outline:none}.scene-tab[aria-selected=true]{border-color:var(--lab-gold);background:var(--lab-gold);color:#18232a}
.scene-layout{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(320px,.75fr);min-height:700px}
.viewer-card{min-width:0;padding:1rem;background:#e7ecee;border-right:1px solid #c8d1d4}
.viewer-toolbar{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:.5rem}
.viewer-toolbar h2{margin:.15rem 0 0;font-family:Fraunces,Georgia,serif;font-size:clamp(1.35rem,2vw,2rem)}
.viewer-kicker{color:var(--lab-green);font-size:.78rem;font-weight:900;letter-spacing:.08em;text-transform:uppercase}
.zoom-controls{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:.4rem}.zoom-controls button{min-width:44px;min-height:44px;border:1px solid #a8b3b8;border-radius:.55rem;background:#fff;color:var(--lab-ink);font-weight:800;cursor:pointer}
.zoom-controls button:hover,.zoom-controls button:focus-visible{border-color:var(--lab-red);outline:3px solid rgba(217,71,63,.18)}
.viewer-help{margin:.35rem 0 .7rem;color:#52626b;font-size:.9rem}
.image-viewport{position:relative;height:clamp(520px,68vh,820px);overflow:hidden;border:1px solid #83949c;border-radius:.75rem;background:#07131b;touch-action:none;cursor:grab;overscroll-behavior:contain}
.image-viewport:active{cursor:grabbing}.image-viewport:focus-visible{outline:4px solid rgba(244,185,66,.7);outline-offset:2px}
.image-stage{position:absolute;left:50%;top:50%;width:max-content;max-width:none;transform-origin:center center;will-change:transform}
.image-stage>img{display:block;width:auto;height:clamp(520px,68vh,820px);max-width:none;user-select:none;-webkit-user-drag:none}
.hotspot-layer{position:absolute;inset:0}
.hotspot-lines{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none;z-index:1}
.hotspot-line{stroke:rgba(255,255,255,.92);stroke-width:1.4;vector-effect:non-scaling-stroke;filter:drop-shadow(0 1px 1px rgba(0,0,0,.8));transition:stroke .16s,stroke-width .16s}
.hotspot-target{position:absolute;width:9px;height:9px;transform:translate(-50%,-50%);border:2px solid #fff;border-radius:50%;background:var(--lab-red);box-shadow:0 0 0 2px rgba(7,23,34,.58);pointer-events:none;z-index:2;transition:width .16s,height .16s,background .16s,box-shadow .16s}
.hotspot{position:absolute;display:grid;place-items:center;width:26px;height:26px;transform:translate(-50%,-50%);border:2px solid #fff;border-radius:50%;background:rgba(217,71,63,.96);color:#fff;font-size:.78rem;font-weight:950;line-height:1;box-shadow:0 2px 5px rgba(0,0,0,.55);cursor:pointer;transition:scale .16s,background .16s;z-index:3}
.hotspot::before{content:"";position:absolute;width:44px;height:44px;border-radius:50%}
.hotspot:hover,.hotspot:focus-visible{scale:1.12;outline:3px solid var(--lab-gold);outline-offset:2px}
.hotspot.is-reviewed{background:var(--lab-green)}
.hotspot[aria-current=true]{background:var(--lab-gold);color:#17242b;outline:3px solid #fff;outline-offset:2px}
.hotspot-line.is-active{stroke:var(--lab-gold);stroke-width:2.5}
.hotspot-target.is-active{width:15px;height:15px;background:var(--lab-gold);box-shadow:0 0 0 3px #fff,0 0 0 6px rgba(244,185,66,.55)}
.component-panel{padding:1.2rem;background:#fff;overflow:auto}.panel-empty{display:grid;align-content:center;justify-items:center;min-height:620px;text-align:center;color:#53646d}.panel-empty h2{margin:.9rem 0 .35rem;font-family:Fraunces,Georgia,serif;color:var(--lab-ink)}.panel-empty p{max-width:28rem;line-height:1.55}
.empty-marker,.detail-number{display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:var(--lab-red);color:#fff;font-weight:950}
.component-detail{animation:detail-in .22s ease}.detail-heading{display:flex;align-items:center;gap:.85rem;padding-bottom:1rem;border-bottom:1px solid var(--lab-line)}.detail-heading p{margin:0;color:#687780;font-size:.78rem;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.detail-heading h2{margin:.18rem 0 0;font-family:Fraunces,Georgia,serif;font-size:1.6rem;line-height:1.1}
.component-purpose{font-size:1.03rem;line-height:1.6}.component-detail h3{margin:1.2rem 0 .5rem;font-size:1rem}.component-detail ul{margin:.4rem 0;padding-left:1.25rem}.component-detail li{margin:.55rem 0;line-height:1.5}
.defect-box{margin:1rem 0;padding:1rem;border-left:4px solid var(--lab-red);border-radius:.45rem;background:#fff0ee}.defect-box p{margin:.35rem 0 0;line-height:1.5}
.detail-photo{margin:1rem 0}.detail-photo img{display:block;width:100%;max-height:320px;object-fit:contain;border:1px solid var(--lab-line);border-radius:.55rem;background:#eef1f2}.detail-photo figcaption{margin-top:.4rem;color:#5e6e76;font-size:.82rem;line-height:1.4}
.review-check{display:flex;align-items:center;gap:.65rem;margin-top:1.1rem;padding:.9rem;border:1px solid #b5c8bf;border-radius:.55rem;background:#eff8f4;font-weight:800;cursor:pointer}.review-check input{width:1.25rem;height:1.25rem;accent-color:var(--lab-green)}
.overall-progress{display:grid;grid-template-columns:auto minmax(220px,1fr) auto;align-items:center;gap:1rem;margin-top:1rem;padding:1rem 1.2rem;border:1px solid #c8d1d4;border-radius:.75rem;background:#fff}.overall-progress>div:first-child{display:grid}.overall-progress span{color:#5a6971;font-size:.86rem}.progress-track{height:10px;overflow:hidden;border-radius:999px;background:#dce4e6}.progress-track span{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--lab-gold),var(--lab-green));transition:width .25s}.overall-progress button{border:0;background:transparent;color:#8c2f2a;font-weight:800;cursor:pointer}
.image-credits{margin-top:1rem;padding:.9rem 1rem;border:1px solid #d7d2c7;border-radius:.65rem;background:#fbfaf6}.image-credits summary{font-weight:800;cursor:pointer}.image-credits p{margin:.7rem 0 0;color:#58666d;line-height:1.55}
@keyframes detail-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media(max-width:980px){.scene-layout{grid-template-columns:1fr}.viewer-card{border-right:0;border-bottom:1px solid #c8d1d4}.component-panel{min-height:360px}.panel-empty{min-height:330px}.image-viewport{height:min(66vh,680px)}.image-stage>img{height:min(66vh,680px)}}
@media(max-width:680px){.lab-shell{width:min(100% - 1rem,1500px);padding-top:1rem}.lab-intro{display:block}.language-link{display:inline-block;margin-top:1rem}.viewer-toolbar{align-items:flex-start;flex-direction:column}.zoom-controls{justify-content:flex-start}.zoom-controls button[data-fullscreen]{display:none}.image-viewport{height:58vh;min-height:430px}.image-stage>img{height:58vh;min-height:430px}.hotspot{width:28px;height:28px;font-size:.82rem}.overall-progress{grid-template-columns:1fr}.overall-progress button{justify-self:start}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.component-detail,.hotspot,.progress-track span{animation:none;transition:none}}