.geometry-canvas {
            width: 100%;
            max-width: 512px;
            height: auto;
            background-color: #1a1a1a;
            border: 2px solid #333;
            border-radius: 8px;
            margin-top: 1rem;
            display: block;
            margin-left: auto;
            margin-right: auto;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .legend {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin: 0.8rem 0;
            font-size: 0.85rem;
            flex-wrap: wrap;
        }
        .upload-area {
            border: 2px dashed #ccc;
            border-radius: 8px;
            padding: 1rem;
            text-align: center;
            background: #f8f9fa;
            margin-top: 1rem;
        }
        .intensity-slider {
            width: 100%;
            margin-top: 0.5rem;
        }