.scene-plate { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; object-fit: cover; opacity: .94; }
.lab > *:not(.scene-plate) { z-index: 1; }
.lab { background: #c9a576; }
.arena { background: rgba(255,248,222,.12); backdrop-filter: blur(1px); }
.material-tray { position: relative; z-index: 2; background: rgba(255,249,233,.84); }