:root{color-scheme:light;--paper:#f7f7f2;--ink:#24352f;--muted:#61726b;--line:#dce2d8;--blue:#285cda;--orange:#c75c25;--green:#24664c;--axis:#a47c31;--pale:#edf1e7;--error:#a12e34;font-family:"Avenir Next","PingFang TC","Microsoft JhengHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink)}[hidden]{display:none!important}
button,input,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer;color:inherit;border:0;background:transparent;min-height:44px;padding:8px 14px;border-radius:6px}button:disabled{opacity:.4;cursor:default}button:hover:not(:disabled){background:var(--pale)}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #b17912;outline-offset:4px}button[aria-pressed=true]{background:var(--ink);color:var(--paper)}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,p{margin:0}h2{font-size:17px;font-weight:600}small{font-size:12px}.geometry-lab{max-width:1600px;margin:auto;padding:0 36px}main{min-width:0}
.geo-header{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}.geo-brand{display:flex;align-items:center;gap:12px;font-size:16px;font-weight:600}.geo-brand>span:first-child{font:italic 40px Georgia,serif;color:var(--green)}.geo-brand small{display:block;font-size:9px;letter-spacing:.18em;margin-top:3px}.geo-header nav{display:flex;align-items:center;gap:16px}.geo-header nav a{font-size:13px;display:flex;align-items:center;min-height:44px}.geo-header nav button{font-size:25px;width:44px;padding:0}.geo-intro{display:flex;justify-content:space-between;align-items:center;padding:24px 0;gap:24px}.eyebrow{font-size:10px;color:var(--green);letter-spacing:.18em;margin-bottom:7px}h1{font-size:clamp(28px,3.2vw,44px);font-weight:500;letter-spacing:-.045em}.geo-intro p{font-size:14px;line-height:1.8;color:var(--muted)}
.operation-tabs{display:flex;border-top:1px solid var(--line);border-bottom:1px solid var(--line);gap:4px;padding:5px 0}.operation-tabs button{flex:1;text-align:left;border-radius:3px;padding:13px 18px;font-size:18px}.operation-tabs button span{font-size:10px;opacity:.7;margin-right:12px}.operation-tabs small{font-size:12px;margin-left:15px;opacity:.8}.operator-panel{padding:16px 0 12px;min-height:114px;border-bottom:1px solid var(--line)}.operator-controls{display:flex;align-items:center;gap:30px;max-width:940px;min-height:54px}.preset-group{display:flex;gap:4px;flex-shrink:0}.preset-group button{min-width:70px;font-size:20px;border:1px solid var(--line)}.preset-group small{margin-left:5px;font-size:12px}.slider-field{display:block;flex:1;min-width:0;font-size:13px}.slider-field>span{display:flex;justify-content:space-between;align-items:baseline;gap:10px}.slider-field output{font-variant-numeric:tabular-nums;font-size:18px;color:var(--green)}input[type=range]{display:block;accent-color:var(--green);width:100%;height:28px;margin:3px 0 0;cursor:pointer;touch-action:pan-y}#operation-summary{font-size:13px;color:var(--muted);line-height:1.6;margin-top:8px;min-height:22px}
.visual-pair{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--line)}.plot{min-width:0;padding:15px 22px 14px 0}.plot+.plot{padding:15px 0 14px 22px;border-left:1px solid var(--line)}.plot-heading{display:flex;align-items:center;gap:10px;min-height:44px;flex-wrap:wrap}.view-choice{display:flex;gap:2px;margin-left:auto}.view-choice button{font-size:12px;padding:7px 10px;min-height:38px}.view-note{font-size:11px;color:var(--muted);margin-left:auto}.quiet-button{font-size:12px}.canvas-wrap{position:relative;height:clamp(260px,29vw,390px)}canvas{display:block;width:100%;height:100%}#bloch-canvas{cursor:grab;touch-action:none}#bloch-canvas:active{cursor:grabbing}.plot-key{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:11px;color:var(--muted);min-height:20px}.key{display:inline-flex;align-items:center;gap:6px}.key:before{content:"";display:inline-block;width:17px;height:0;border-top:2px solid}.blue:before{border-color:var(--blue)}.orange:before{border-color:var(--orange)}.green:before{border-color:var(--green)}.axis:before{border-color:var(--axis)}.trail:before{border-color:var(--green);opacity:.4}.dashed:before{border-color:var(--muted);border-top-style:dashed}.plot-caption{font-size:12px;line-height:1.6;color:var(--muted);margin-top:9px;min-height:38px}.camera-controls{display:flex;align-items:center;gap:1px;margin-top:5px}.camera-controls button{min-width:36px;min-height:38px;padding:3px;font-size:18px}.camera-controls span{font-size:11px;color:var(--muted);margin-left:6px;line-height:1.5}.bloch-unavailable{position:absolute;inset:auto 12px 8px;padding:12px;background:#f7f7f2ed;border-left:3px solid var(--error);pointer-events:none}.bloch-unavailable strong,.bloch-unavailable span{display:block}.bloch-unavailable strong{font-size:14px;color:var(--error)}.bloch-unavailable span{font-size:12px;margin-top:5px}
.state-readouts{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,.65fr) minmax(0,1fr) minmax(0,1fr);gap:22px;padding:19px 0;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}.readout-label{font-size:11px;color:var(--muted);display:block;margin-bottom:8px}.state-readouts strong{font-weight:500}.amplitude-readout>div{display:flex;flex-wrap:wrap;gap:5px 20px;font-size:17px}.state-readouts small{display:block;color:var(--muted);font-size:11px;margin-top:7px;line-height:1.6}.norm-readout>strong{font-size:25px;line-height:1}.probability-track{height:6px;background:#e5e9e1;overflow:hidden;border-radius:5px;margin:13px 0 8px}.probability-track i{display:block;background:var(--blue);height:100%;width:50%}#probability-values,#bloch-values{font-size:14px;line-height:1.5;overflow-wrap:anywhere}.state-readouts.invalid #norm-value,.state-readouts.invalid #validity-value{color:var(--error)}
.evolution{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:14px 28px;align-items:center;padding:18px 0;border-bottom:1px solid var(--line)}.primary-button{background:var(--green);color:var(--paper);min-width:112px}.primary-button:hover:not(:disabled){background:#184832}.outlined-button{border:1px solid var(--line);font-size:13px}.evolution p{grid-column:1/-1;font-size:12px;color:var(--muted);line-height:1.6}.preparation{padding:20px 0}.preparation-heading{display:flex;align-items:center;gap:20px;flex-wrap:wrap}.preparation-heading>span{font-size:13px;color:var(--muted);overflow-wrap:anywhere;flex:1}.preparation-heading button{margin-left:auto}.state-presets{display:flex;gap:5px;margin:12px 0}.state-presets button{font:18px Georgia,serif;min-width:60px;border:1px solid var(--line)}.preparation-sliders{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}.preparation-formula{font-size:14px;line-height:1.7;margin-top:12px;user-select:text}.preparation-formula span{display:block;color:var(--muted);font-size:12px}.model-details{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0}.model-details summary{font-size:13px;padding:10px 0;cursor:pointer;min-height:44px}.model-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px 36px;padding:16px 0 24px;user-select:text}.model-grid h3{font-size:16px;font-weight:500;margin-bottom:10px}.model-grid p{font-size:13px;line-height:1.9;color:var(--muted);margin-top:8px;overflow-wrap:anywhere}.model-grid a{color:var(--green);text-decoration:underline}.geo-footer{display:flex;justify-content:space-between;gap:20px;padding:18px 0 28px;color:var(--muted);font-size:11px;line-height:1.7}#geo-status{max-width:55%}
.geometry-lab:fullscreen{background:var(--paper);overflow:auto;max-width:none;width:100%;height:100%}.geometry-lab::backdrop{background:var(--paper)}
@media(min-width:1500px){.canvas-wrap{height:410px}}
@media(max-width:1000px){.geometry-lab{padding:0 22px}.operation-tabs small{margin-left:8px}.plot{padding-right:15px}.plot+.plot{padding-left:15px}.view-note{display:none}.state-readouts{gap:16px}.amplitude-readout>div{font-size:15px}.state-readouts{grid-template-columns:1fr .6fr 1fr}.bloch-readout{grid-column:1/-1;display:flex;align-items:baseline;gap:12px}.bloch-readout .readout-label,.bloch-readout small{margin:0}.canvas-wrap{height:300px}.camera-controls{flex-wrap:wrap}.camera-controls span{flex-basis:100%;margin-left:0}}
@media(max-width:700px){.geometry-lab{padding:0 16px}.geo-header{height:66px;gap:10px}.geo-brand{font-size:14px;gap:8px}.geo-header nav{gap:2px}.geo-header nav a{font-size:12px}.geo-intro{display:block;padding:22px 0 18px}.geo-intro p{font-size:13px;margin-top:10px}.geo-intro p br{display:none}.operation-tabs button{padding:12px 8px;font-size:17px}.operation-tabs button span{display:none}.operation-tabs small{display:block;font-size:11px;margin:5px 0 0}.operator-controls{gap:12px;flex-wrap:wrap}.operator-controls>.slider-field{flex-basis:100%}.operator-panel{min-height:0}.preset-group{width:100%}.preset-group button{flex:1}.operator-controls input[type=range]{height:36px}.visual-pair{grid-template-columns:minmax(0,1fr)}.plot,.plot+.plot{padding:14px 0;border-left:0}.plot+.plot{border-top:1px solid var(--line)}.canvas-wrap{height:300px}.plot-key{font-size:12px}.view-choice button{min-height:44px}.plot-caption{min-height:0}.camera-controls button{min-width:44px;min-height:44px}.camera-controls span{flex:1;flex-basis:70px;margin-left:8px;font-size:12px}.state-readouts{grid-template-columns:minmax(0,1fr) minmax(0,.65fr);gap:18px}.probability-readout{grid-column:1/-1}.bloch-readout{flex-wrap:wrap;gap:6px 12px}.readout-label,.state-readouts small{font-size:12px}.evolution{grid-template-columns:auto minmax(0,1fr);gap:12px 18px}.evolution .outlined-button{grid-column:1/-1}.preparation-heading{gap:8px}.preparation-heading>span{order:3;flex-basis:100%;font-size:13px}.state-presets{flex-wrap:wrap}.state-presets button{flex:1;min-width:44px;padding:7px}.preparation-sliders{grid-template-columns:1fr;gap:14px}.slider-field{font-size:14px}.slider-field input{height:36px}.model-grid{grid-template-columns:1fr}.model-grid p{font-size:14px}.geo-footer{display:block;font-size:12px}.geo-footer span{display:block}#geo-status{max-width:none;margin-top:6px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important}}