:root{
  --bg:#0e1013;
  --panel:rgba(18,20,24,.84);
  --panel-line:rgba(255,255,255,.08);
  --ink:#ece8e1;
  --ink-2:#a9a49b;
  --ink-3:#6f6b65;
  --accent:#d6b47a;      /* travertine */
  --accent-ink:#1a1408;
  --chip:rgba(255,255,255,.06);
  --chip-on:rgba(214,180,122,.18);
  --radius:14px;
  --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);font:14px/1.45 var(--font);-webkit-font-smoothing:antialiased;overflow:hidden}
#app{position:fixed;inset:0}
#c{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;outline:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}

.brand{position:absolute;left:16px;top:16px;display:flex;gap:12px;align-items:center;padding:10px 16px 10px 10px;background:var(--panel);border:1px solid var(--panel-line);border-radius:var(--radius);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);z-index:3}
.brand-mark{width:36px;height:36px;border-radius:10px;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center}
.brand-mark svg{width:20px;height:20px;stroke-width:2}
.brand h1{margin:0;font-size:15px;font-weight:600;letter-spacing:.01em}
.brand p{margin:0;font-size:12px;color:var(--ink-2)}

.panel-toggle{position:absolute;left:16px;top:84px;z-index:4;width:36px;height:36px;border-radius:10px;background:var(--panel);border:1px solid var(--panel-line);display:none;place-items:center}

.panel{position:absolute;left:16px;top:84px;bottom:16px;width:300px;overflow:auto;padding:6px 16px 16px;background:var(--panel);border:1px solid var(--panel-line);border-radius:var(--radius);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);z-index:3;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.15) transparent}
.panel section{padding:12px 0;border-bottom:1px solid var(--panel-line)}
.panel section:last-child{border-bottom:0}
.panel h2{margin:0 0 10px;font-size:11px;font-weight:600;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3)}

.seg{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:4px;padding:4px;background:var(--chip);border-radius:10px}
.seg button{padding:8px 6px;border-radius:7px;color:var(--ink-2);font-weight:500;font-size:13px;line-height:1.2;transition:background .15s,color .15s}
.seg button:hover{color:var(--ink)}
.seg button.on{background:var(--accent);color:var(--accent-ink)}
.seg.small button{padding:6px 4px;font-size:12.5px}
#modelSeg{grid-auto-flow:row;grid-auto-columns:auto}
#modelSeg button{text-align:left;padding:9px 10px;display:flex;justify-content:space-between;gap:8px}
#modelSeg button small{opacity:.7;font-weight:400}
.model-note{margin:8px 2px 0;font-size:12px;color:var(--ink-2)}

.views{display:flex;flex-direction:column;gap:2px;max-height:260px;overflow:auto;margin:0 -6px;padding:0 6px;scrollbar-width:thin}
.views .grp{font-size:11px;color:var(--ink-3);margin:8px 2px 3px}
.views .grp:first-child{margin-top:0}
.views button{text-align:left;padding:6px 10px;border-radius:8px;color:var(--ink-2);font-size:13px}
.views button:hover{background:var(--chip);color:var(--ink)}
.views button.on{background:var(--chip-on);color:var(--accent)}
.views .empty{color:var(--ink-3);font-size:12.5px;padding:2px}

.slider-row{display:flex;align-items:center;gap:10px;margin-top:10px}
.slider-row input{flex:1;accent-color:var(--accent)}
.slider-row output{min-width:64px;text-align:right;font-variant-numeric:tabular-nums;font-size:12.5px;color:var(--ink-2)}

.check{display:flex;align-items:center;gap:8px;margin-top:10px;color:var(--ink-2);font-size:13px;cursor:pointer}
.check input{accent-color:var(--accent);width:15px;height:15px}

.tools{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.tool{display:flex;align-items:center;justify-content:center;gap:7px;padding:9px 8px;border-radius:10px;background:var(--chip);font-size:13px;font-weight:500}
.tool:hover{background:rgba(255,255,255,.1)}
.tool.on{background:var(--accent);color:var(--accent-ink)}
.tool.ghost{background:none;border:1px solid var(--panel-line);color:var(--ink-2);font-weight:400}
.tool:disabled{opacity:.4;cursor:not-allowed}

.hud{position:absolute;right:16px;bottom:16px;z-index:3;padding:8px 12px;background:var(--panel);border:1px solid var(--panel-line);border-radius:10px;font-size:12px;color:var(--ink-2);font-variant-numeric:tabular-nums;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);max-width:calc(100vw - 32px)}
.hud b{color:var(--ink);font-weight:500}
.hint{position:absolute;left:50%;top:18px;transform:translateX(-50%);z-index:5;padding:9px 14px;border-radius:999px;background:rgba(10,11,13,.86);border:1px solid var(--panel-line);font-size:13px;color:var(--ink);white-space:nowrap}
.hint kbd{font:inherit;font-size:11.5px;padding:1px 6px;border-radius:5px;background:rgba(255,255,255,.12);margin:0 2px}

.measure-label{padding:3px 8px;border-radius:6px;background:var(--accent);color:var(--accent-ink);font:600 12px/1.3 var(--font);white-space:nowrap;pointer-events:none;box-shadow:0 2px 10px rgba(0,0,0,.35)}
.measure-label small{display:block;font-weight:500;font-size:10.5px;opacity:.75}

.loader{position:absolute;inset:0;z-index:10;display:grid;place-items:center;background:radial-gradient(ellipse at center,rgba(14,16,19,.55),rgba(14,16,19,.92));transition:opacity .4s}
.loader.hide{opacity:0;pointer-events:none}
.loader-card{width:min(340px,80vw);text-align:center}
.loader-title{font-weight:600;font-size:15px;margin-bottom:14px}
.bar{height:4px;border-radius:4px;background:rgba(255,255,255,.1);overflow:hidden}
.bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s}
.loader-sub{margin-top:10px;font-size:12px;color:var(--ink-2);font-variant-numeric:tabular-nums}
.err{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:11;max-width:420px;padding:18px 20px;border-radius:var(--radius);background:#2a1414;border:1px solid #6b2a2a;color:#f3d6d6}

@media (max-width:760px){
  .brand{left:12px;top:12px;right:60px;padding:8px 12px 8px 8px}
  .brand-mark{width:30px;height:30px}
  .brand p{display:none}
  .panel-toggle{display:grid;left:auto;right:12px;top:12px;width:44px;height:44px}
  .panel{left:12px;right:12px;top:auto;bottom:12px;width:auto;max-height:52vh;padding:4px 14px 12px}
  .panel.closed{display:none}
  .hud{display:none}
  .views{max-height:150px}
  #btnWalk{display:none}
}