body{margin:0;background:#000;color:#fff;font-family:sans-serif}#app{width:100vw;height:100vh;position:relative}#canvas{width:100%;height:100%;display:block}#gizmo{position:absolute;left:14px;top:14px;width:120px;height:120px;pointer-events:auto;cursor:pointer;z-index:12}#message{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;display:flex;align-items:center;justify-content:center;color:#ff5b5b;font-weight:700;font-size:18px}#spinner{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;pointer-events:none;z-index:10}#spinner.hidden{display:none}.spinner-ring{width:48px;height:48px;border:3px solid rgba(255,255,255,.15);border-top-color:#fffc;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}#dropzone{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);min-width:360px;max-width:min(80vw,560px);padding:24px 28px;border:2px dashed rgba(255,255,255,.45);border-radius:12px;background:#00000073;color:#fffffff2;text-align:center;font-size:14px;line-height:1.4;z-index:3;cursor:pointer;transition:border-color .15s ease,background .15s ease}#dropzone:hover{border-color:#ffffffb3;background:#0000008c}#dropzone.hidden{display:none}#progress{position:absolute;left:0;top:0;height:4px;width:0;background:#38f;z-index:5;transition:width .12s linear}#quality{position:absolute;right:12px;bottom:10px;font-size:12px;text-shadow:0 0 4px #000}.lil-gui.root{position:fixed!important;left:auto!important;right:12px!important;top:12px!important;z-index:20}.lil-gui.root>.children{max-height:calc(100vh - 60px);overflow-y:auto}#stereo-controls{position:absolute;left:12px;bottom:12px;display:flex;flex-direction:column;gap:8px;z-index:25}.stereo-btn{width:40px;height:27px;border:none;border-radius:10px;background:transparent;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;padding:0;transition:background .1s ease}.stereo-btn.active{background:#fff3}.stereo-icon{width:100%;height:100%;object-fit:contain;pointer-events:none}.stereo-btn.active .stereo-icon{filter:drop-shadow(0 0 2px rgba(255,255,255,.35))}