*{box-sizing:border-box}html,body,#app{width:100%;height:100%;margin:0;overflow:hidden;font-family:Arial,Helvetica,sans-serif;background:#202326;color:#f5f5f2}#renderCanvas{width:100%;height:100%;display:block;touch-action:none}.loading{position:fixed;inset:0;display:grid;place-items:center;background:#202326;color:#f5f5f2;font-size:18px;z-index:5}.loading.hidden{display:none}.loading.error{padding:24px;color:#ffd0d0;text-align:center}#app:after{content:"";position:fixed;left:50%;top:50%;width:16px;height:16px;pointer-events:none;border-left:2px solid rgba(255,255,255,.86);border-top:2px solid rgba(255,255,255,.86);transform:translate(-50%,-50%) rotate(45deg);z-index:4;display:none}#app.look-mode:after{display:block}.hud,.material-panel{position:fixed;background:#222528e6;border:1px solid rgba(255,255,255,.16);border-radius:6px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 12px 40px #00000047}.hud{left:16px;top:16px;padding:12px;width:min(620px,calc(100vw - 32px))}.hud-row,.panel-actions,.material-grid{display:flex;gap:8px;flex-wrap:wrap}button{min-height:34px;border:1px solid rgba(255,255,255,.18);border-radius:5px;background:#3e464f;color:#fff;padding:7px 10px;font-size:14px;cursor:pointer}button.secondary{background:#30363c;color:#dbe2e7}button:hover,button:focus-visible{background:#53606b;outline:none}.hint{margin-top:8px;color:#c8d0d7;font-size:13px;line-height:1.35}.orientation-line{margin-top:8px;color:#f1f4f6;font-size:13px;line-height:1.35}.gate-interaction{margin-top:8px;color:#fff4c2;font-size:14px;font-weight:700}.gate-interaction.hidden{display:none}.mouse-sensitivity-control{display:grid;grid-template-columns:minmax(150px,max-content) minmax(180px,1fr);gap:6px 12px;align-items:center;margin-top:10px;color:#eef3f6;font-size:13px}.mouse-sensitivity-control label{font-weight:700}.mouse-sensitivity-row{display:grid;grid-template-columns:minmax(120px,1fr) 64px;gap:10px;align-items:center}.mouse-sensitivity-row input{width:100%;min-width:0;accent-color:#d6a23a}.mouse-sensitivity-row output{color:#fff;font-variant-numeric:tabular-nums;white-space:nowrap}.mouse-sensitivity-hint{grid-column:1 / -1;margin-top:0}.material-panel{right:16px;top:16px;width:min(340px,calc(100vw - 32px));padding:14px}.material-panel h1{margin:0 0 8px;font-size:18px;line-height:1.2}.material-panel p{min-height:44px;margin:0 0 10px;color:#dfe4e7;font-size:14px;line-height:1.35}.material-grid button{width:148px;min-height:42px;text-align:left}.material-swatch{display:inline-block;width:14px;height:14px;margin-right:6px;vertical-align:-2px;border:1px solid rgba(255,255,255,.45)}.panel-actions{margin-top:12px}@media(max-width:800px){.hud,.material-panel{left:10px;right:10px;width:auto}.material-panel{top:auto;bottom:10px}.mouse-sensitivity-control{grid-template-columns:1fr}}