:root{color-scheme:dark;--bg:#0b151e;--panel:#12232f;--line:#2b4456;--ink:#edf3f7;--muted:#9eb6c8;--accent:#f1bd7c;--teal:#76ddce;--stage:#0b1925;--field:#59cfe1;--negative:#ff9785;font-family:'Segoe UI',system-ui,sans-serif}
:root[data-theme=light]{color-scheme:light;--bg:#edf3f6;--panel:#fff;--line:#cad9e2;--ink:#193442;--muted:#536e7d;--accent:#955313;--teal:#087d73;--stage:#e4eef3;--field:#087c98;--negative:#b43f2f}
*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;padding:18px max(18px,env(safe-area-inset-right)) max(90px,env(safe-area-inset-bottom)) max(18px,env(safe-area-inset-left));background:var(--bg);color:var(--ink)}button,input,select,a{font:inherit;touch-action:manipulation}button,select{min-height:42px;padding:9px 12px;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:9px;cursor:pointer}button:hover,select:hover{border-color:var(--accent)}button:disabled{opacity:.4;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible,summary:focus-visible,canvas:focus-visible{outline:2px solid var(--teal);outline-offset:3px}button[aria-pressed=true]{border-color:var(--teal)}a{color:var(--teal);text-decoration:none}header{max-width:1760px;margin:0 auto 18px;display:flex;gap:16px;align-items:center}.back{font-size:13px;min-height:44px;display:flex;align-items:center}.heading{flex:1}.eyebrow{font-size:10px;letter-spacing:.16em;color:var(--accent)}h1{font-size:clamp(18px,2vw,25px);font-weight:650;letter-spacing:-.02em;margin:4px 0 0}header button{font-size:12px}.lab{display:grid;grid-template-columns:264px minmax(0,1fr);gap:16px;max-width:1760px;margin:auto;align-items:start}.panel{border:1px solid var(--line);border-radius:15px;background:var(--panel);min-width:0}.controls{padding:19px}.controls section+section{border-top:1px solid var(--line);margin-top:17px;padding-top:17px}h2{font-size:14px;margin:0 0 14px;font-weight:600;display:flex;align-items:center;gap:8px}.field-dot,.surface-dot,.normal-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--field);flex:none}.surface-dot{background:var(--teal)}.normal-dot{background:var(--accent)}.number-label,.select-label{display:flex;align-items:center;justify-content:space-between;gap:5px;font-size:12px}.number-label>span{display:flex;align-items:center;gap:4px;white-space:nowrap}.number-label input{width:82px}input[type=number],input[type=text]{border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:7px;min-height:37px;padding:6px;font-variant-numeric:tabular-nums}input[type=number]:invalid{border-color:var(--negative)}input[type=range]{width:100%;min-height:32px;margin:5px 0 9px;accent-color:var(--accent);cursor:pointer}.bounds{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin:-7px 0 5px}.unit{font-size:10px;color:var(--muted)}select{width:100%;font-size:13px;margin:7px 0 12px}.parameter-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.parameter-grid label{font-size:11px;color:var(--muted)}.parameter-grid input{width:100%;margin-top:5px;color:var(--ink)}.formula{display:block;font:12px/1.6 'Segoe UI',sans-serif;color:var(--teal);padding:10px 11px;margin-top:10px;border-radius:8px;background:color-mix(in srgb,var(--teal) 7%,var(--bg));overflow-wrap:anywhere}.expression-label{font-size:11px;display:block;margin-bottom:6px}#expression{width:100%;font-family:Consolas,monospace;font-size:12px}.wide{width:100%;margin-top:8px;font-size:12px}.hint,.notice{font-size:11px;line-height:1.5;margin:8px 0 0;color:var(--muted)}.notice{color:var(--negative)}.check{display:flex;align-items:center;gap:8px;font-size:12px;min-height:36px;cursor:pointer}.check input{width:17px;height:17px;accent-color:var(--teal)}.display-settings{margin-top:10px;border-top:1px solid var(--line);padding-top:10px}.display-settings summary{cursor:pointer;font-size:12px;min-height:32px;padding-top:6px;color:var(--muted)}.observation{min-width:0}.stage-panel{overflow:hidden}.stage-top{padding:11px 15px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);font-size:12px}.live{color:var(--teal)}.live:before{content:'';width:6px;height:6px;border-radius:50%;background:currentColor;display:inline-block;margin-right:7px}.time{color:var(--muted);font-variant-numeric:tabular-nums}.playback{display:flex;gap:7px}.playback button{font-size:11px;white-space:nowrap}.stage{position:relative;background:radial-gradient(ellipse at 50% 30%,color-mix(in srgb,var(--field) 9%,var(--stage)),var(--stage) 70%)}#scene{width:100%;height:clamp(380px,59vh,680px);display:block;touch-action:none;cursor:grab}#scene:active{cursor:grabbing}#view-message{position:absolute;left:16px;right:16px;top:14px;font-size:12px;color:var(--accent);pointer-events:none}#view-message:empty{display:none}.legend{position:absolute;left:18px;bottom:15px;display:flex;gap:16px;flex-wrap:wrap;font-size:11px;color:var(--muted);pointer-events:none}.legend span{display:flex;align-items:center;gap:6px}.stage-bottom{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:9px 12px;border-top:1px solid var(--line);font-size:10px;color:var(--muted)}.stage-bottom>div{display:flex;gap:6px}.stage-bottom button{font-size:11px;white-space:nowrap;padding:7px 10px}.readings{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;margin-top:14px;padding:17px 0}.readings>div{padding:0 19px;min-width:0}.readings>div+div{border-left:1px solid var(--line)}.reading-label{font-size:10px;letter-spacing:.12em;color:var(--muted)}.flux-value{display:flex;align-items:baseline;gap:7px;margin:3px 0 9px;color:var(--teal);font-variant-numeric:tabular-nums}.flux-value output{font-size:clamp(23px,2.7vw,34px);font-weight:650;letter-spacing:-.04em}.flux-value>span{font-size:13px}.flux-reading.negative .flux-value{color:var(--negative)}.equation{font-size:12px;color:var(--muted)}.flux-meter{height:5px;position:relative;background:var(--line);border-radius:9px;margin-bottom:10px}.flux-meter>i{position:absolute;left:50%;top:-2px;height:9px;width:1px;background:var(--muted)}.flux-meter>b{position:absolute;height:5px;left:50%;width:0;background:var(--teal);border-radius:9px}.negative .flux-meter>b{background:var(--negative)}.reading{display:flex;flex-direction:column;justify-content:center;gap:8px}.reading>span{color:var(--muted);font-size:12px}.reading output{font-size:18px;font-variant-numeric:tabular-nums}.reading small{font-size:10px;line-height:1.5;color:var(--muted)}.caption{font-size:11px;color:var(--muted);text-align:center;margin:12px 0 0}
@media(max-width:1050px){.lab{grid-template-columns:230px minmax(0,1fr);gap:12px}.controls{padding:15px}.stage-top{flex-wrap:wrap;gap:8px}.playback{margin-left:auto}.readings{grid-template-columns:1.2fr 1fr}.readings>div{padding:12px 17px}.readings>div:nth-child(3){border-left:0}.readings>div:nth-child(n+3){border-top:1px solid var(--line)}.readings{padding:0}.stage-bottom{flex-wrap:wrap}.stage-bottom>div{margin-left:auto}#scene{height:470px}}
@media(max-width:700px){body{padding:12px max(10px,env(safe-area-inset-right)) max(90px,env(safe-area-inset-bottom)) max(10px,env(safe-area-inset-left))}header{flex-wrap:wrap;gap:9px;margin-bottom:14px}.heading{min-width:200px}header button{font-size:11px;padding:8px 11px}.lab{display:flex;flex-direction:column}.observation{order:0;width:100%}.controls{order:1;width:100%;display:grid;grid-template-columns:1fr 1fr;gap:18px}.controls section+section{border-top:0;margin:0;padding:0}.controls .display-settings{grid-column:1/-1;margin-top:0}.caption{font-size:10px;line-height:1.5}#scene{height:420px}.legend{left:12px;bottom:12px;gap:12px}.stage-top{font-size:11px;padding:10px}.readings{margin-top:10px}.stage-bottom>span{font-size:9px}.stage-bottom button{font-size:10px}}
@media(max-width:470px){.controls{display:block}.controls section+section{border-top:1px solid var(--line);margin-top:18px;padding-top:18px}#scene{height:350px}.heading h1{font-size:19px}.stage-bottom>div{width:100%;justify-content:flex-end}.readings>div{padding:13px}.reading output{font-size:17px}.flux-value output{font-size:27px}.playback button{min-height:40px;padding:8px}header .back{font-size:12px}.stage-top{gap:5px}.time{margin-left:auto}.playback{margin-left:0;width:100%;justify-content:flex-end}}

@media(pointer:coarse){button,select,input[type=number],input[type=text],.check,.display-settings summary{min-height:44px}input[type=range]{min-height:38px}}

#scene.surface-hover,#scene.surface-dragging{cursor:ew-resize}.number-label>span:first-child{display:block}