:root{--paper:#eeede7;--ink:#243630;--muted:#6e7973;--line:#d3d7ce;--accent:#3b6c58}*{box-sizing:border-box}body{margin:0;background:var(--paper);font:14px -apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;color:var(--ink)}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}button,select,textarea{font:inherit;color:inherit}button{border:1px solid var(--line);background:transparent;cursor:pointer;border-radius:5px;padding:8px 12px}button:hover,a:hover{color:var(--accent);background:#e2e6dc}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,canvas:focus-visible{outline:2px solid var(--accent);outline-offset:3px}header{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 38px;border-bottom:1px solid var(--line)}.brand{font-size:24px;letter-spacing:-1px}.brand span{font-weight:300}.edition{font-size:10px;letter-spacing:2px;color:var(--muted)}.edition b{display:block;margin-top:5px;font-weight:500}header>a{font-size:12px}main{display:grid;grid-template-columns:minmax(0,1fr) 330px;height:calc(100vh - 116px)}.stage{position:relative;min-height:0;overflow:hidden}#canvas{display:block;width:100%;height:100%;position:absolute;inset:0;touch-action:none}.stage-title{position:absolute;top:38px;left:38px;pointer-events:none;z-index:2}.stage-title p{font-size:9px;letter-spacing:2.5px}.stage-title h1{font-size:35px;line-height:1.28;font-weight:400;margin:20px 0 12px;letter-spacing:1px}.stage-title span{font-size:12px;color:var(--muted)}.stage-bottom{position:absolute;bottom:20px;left:30px;right:30px;display:flex;justify-content:space-between;gap:10px;pointer-events:none;color:var(--muted);font-size:10px}.viewbar{position:absolute;bottom:59px;left:50%;transform:translateX(-50%);display:flex;gap:3px;padding:5px;background:#f9f9f1dc;border:1px solid var(--line);border-radius:9px;backdrop-filter:blur(10px);white-space:nowrap}.viewbar button{border:0;font-size:12px;padding:8px 13px}.viewbar .active,.modes .selected{background:var(--ink);color:#fff}aside{overflow:auto;height:100%;padding:30px 22px;border-left:1px solid var(--line);background:#f5f5ef;z-index:3}.panel-heading{display:flex;align-items:center;gap:7px;font-size:12px;font-weight:600}.panel-heading .subtle{margin-left:auto}.dot{width:6px;height:6px;border-radius:100%;background:var(--accent)}.subtle{font-size:10px;font-weight:400;color:var(--muted)}.modes{display:flex;gap:4px;margin:20px 0}.modes button{flex:1;padding:9px 5px;font-size:11px}.range-label{display:flex;justify-content:space-between;font-size:11px}input[type=range]{width:100%;margin:14px 0 18px;accent-color:var(--accent)}.switches{display:grid;grid-template-columns:1fr 1fr;gap:12px 2px;font-size:11px}.switches label:last-child{grid-column:1/-1}.switches input{accent-color:var(--accent);vertical-align:middle;margin:0 6px 1px 0}.divider{height:1px;background:var(--line);margin:24px 0}.tip{font-size:11px;color:var(--muted);line-height:1.7}select{width:100%;padding:9px;border:1px solid var(--line);border-radius:4px;background:transparent;font-size:11px}.chip{font-size:9px;letter-spacing:1px;display:inline-block;padding:4px 7px;background:#e3e8df;margin-top:18px}h2{font-size:17px;font-weight:500;margin:9px 0}#part-detail p,.notice p{font-size:11px;line-height:1.8;color:var(--muted);margin:0}textarea{width:100%;border:1px solid var(--line);border-radius:5px;padding:10px;background:#fffdf8;margin:16px 0 8px;resize:vertical;font-size:12px}.row{display:flex;gap:5px}.row button{font-size:10px;flex:1;padding:8px 4px}.notice{margin-top:24px;padding:12px;border-left:2px solid #9cae9a;background:#e9ede3}.notice b{font-size:10px;font-weight:500}.notice p{font-size:10px;margin-top:5px}.downloads{display:flex;justify-content:space-between;margin-top:18px;font-size:10px}footer{height:38px;border-top:1px solid var(--line);display:flex;align-items:center;padding:0 38px;gap:30px;font-size:9px;letter-spacing:.7px;color:var(--muted)}footer a{margin-left:auto}#loading{position:absolute;top:48%;left:50%;transform:translate(-50%,-50%);background:#fafaf0ee;padding:15px 25px;border-radius:7px;z-index:4;font-size:12px}#labels{position:absolute;inset:0;pointer-events:none}.electrode-label{position:absolute;padding:4px 6px;background:#243630df;color:#fff;font-size:9px;border-radius:4px;transform:translate(-50%,-50%);border:1px solid #ffffff88}@media(min-width:1500px){.stage-title h1{font-size:43px}aside{padding:32px}main{grid-template-columns:minmax(0,1fr) 370px}}@media(max-width:800px){header{height:64px;padding:0 18px}.edition{display:none}main{display:block;height:auto}.stage{min-height:560px;height:65vh}.stage-title{top:20px;left:20px}.stage-title h1{font-size:25px}.stage-title p{font-size:8px}aside{height:auto;overflow:visible;border-left:0;border-top:1px solid var(--line)}.stage-bottom{font-size:8px;left:15px;right:15px}.viewbar button{padding:8px 10px}footer{height:auto;min-height:45px;padding:12px 18px;gap:8px;flex-wrap:wrap}footer span{display:none}}

/* C1: room for the material close-up and high-resolution views. */
.render-links{display:flex;gap:12px;align-items:center;font-size:11px;margin-top:22px;padding-top:16px;border-top:1px solid var(--line)}.render-links span{color:var(--muted);margin-right:auto}.viewbar button{padding:8px 10px}.stage-title h1{font-size:30px;margin-top:14px}.stage-title{top:28px}.stage-title span{font-size:11px}@media(max-width:800px){.viewbar{max-width:calc(100% - 20px);overflow:auto}.viewbar button{padding:8px 9px}.stage-title h1{font-size:24px}.stage-bottom span:last-child{display:none}}

/* C2: selectable material studies remain alongside the live model. */
[hidden]{display:none!important}
main{grid-template-columns:minmax(0,1fr) 370px}
aside{padding:25px 23px}
.cmf-panel h2{font-size:12px;line-height:1.3;margin:0;font-weight:600}
.cmf-intro{font-size:11px;line-height:1.7;color:var(--muted);margin:12px 0 17px}
.cmf-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;min-height:0}
.cmf-options[aria-busy=true]{min-height:105px;background:linear-gradient(110deg,#e9e9e1,#f4f4ed);border-radius:8px}
.cmf-option{display:block;position:relative;text-align:left;min-width:0;padding:12px 12px 9px;border-radius:8px;background:#eeeee7;transition:background .16s,border-color .16s,box-shadow .16s}
.cmf-option:hover{color:var(--ink);background:#e7e9e0;border-color:#8b9d91}
.cmf-option.is-selected{background:#fffef8;border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
.cmf-option-name{display:block;font-size:13px;font-weight:500;white-space:nowrap;letter-spacing:.1px}
.cmf-swatches{display:flex;gap:5px;margin-top:12px}
.cmf-swatch{display:block;flex:1;min-width:0}
.cmf-swatch i{display:block;height:16px;border-radius:3px;box-shadow:inset 0 0 0 1px #0000000b}
.cmf-swatch>span{display:block;font-size:9px;color:var(--muted);margin-top:5px}
.cmf-option-state{display:flex;justify-content:space-between;align-items:center;margin-top:10px;min-height:13px;font-size:9px;color:var(--muted)}
.cmf-selected-mark{visibility:hidden;color:var(--ink);font-weight:500}
.is-selected .cmf-selected-mark{visibility:visible}
.cmf-selected-mark:before{content:'✓';margin-right:3px}
.cmf-summary{padding-top:19px}
.cmf-selected-heading h3{margin:0 0 7px;font-weight:500;font-size:17px;letter-spacing:.2px}
.cmf-selected-heading>span{font-size:11px;color:#59685f}
#cmf-description{margin:10px 0 0;font-size:11px;line-height:1.8;color:var(--muted)}
.cmf-status{font-size:10px;line-height:1.7;color:var(--muted);margin:10px 0 12px;min-height:17px}
.cmf-renders{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.cmf-render{display:block;position:relative;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#e6e4dc;aspect-ratio:4/3;min-width:0}
.cmf-render img{display:block;width:100%;height:100%;object-fit:cover;transition:transform .2s}
.cmf-render:hover img{transform:scale(1.04)}
.cmf-render>span{position:absolute;bottom:0;left:0;right:0;padding:8px 9px;background:#f5f5efd9;font-size:10px;backdrop-filter:blur(5px);color:var(--ink)}
.cmf-render b{float:right;font-weight:400}
.cmf-render em{position:absolute;inset:0 0 32px;display:grid;place-items:center;font-size:10px;font-style:normal;color:var(--muted)}
.cmf-caption{font-size:9px;line-height:1.7;color:var(--muted);margin:9px 0 0}
.stage-cmf{position:absolute;right:26px;top:30px;z-index:2;display:flex;align-items:center;gap:8px;border:1px solid #d2d5cbd9;background:#f9f9f1c9;backdrop-filter:blur(8px);border-radius:20px;padding:8px 12px;pointer-events:none;font-size:11px}
.stage-cmf-dot{display:inline-block;background:var(--cmf-accent,#dc835f);width:7px;height:7px;border-radius:100%;box-shadow:0 0 0 1px #00000010}
@media(min-width:1500px){main{grid-template-columns:minmax(0,1fr) 390px}aside{padding:28px}}
@media(max-width:1100px) and (min-width:801px){main{grid-template-columns:minmax(0,1fr) 340px}aside{padding:24px 18px}.stage-cmf{top:auto;bottom:112px;right:20px}.stage-title h1{font-size:27px}.viewbar button{padding:8px 8px}}
@media(max-width:800px){main{display:block}.cmf-options{grid-template-columns:repeat(4,minmax(0,1fr))}.cmf-renders{max-width:440px}.cmf-option{padding:11px 9px 8px}.cmf-option-name{font-size:12px}.stage-cmf{right:18px;top:auto;bottom:111px;font-size:10px}.cmf-summary{max-width:620px}}
@media(max-width:520px){.cmf-options{grid-template-columns:repeat(2,minmax(0,1fr))}.cmf-option{padding:13px 12px 9px}.cmf-option-name{font-size:13px}.stage{height:65vh;min-height:510px}.stage-title h1{font-size:24px}.cmf-renders{max-width:none}}
@media(prefers-reduced-motion:reduce){.cmf-option,.cmf-render img{transition:none}}