.geometry-canvas {
            width: 100%;
            height: auto;
            background-color: #f9f9fb;
            border: 1px solid #dce1e8;
            border-radius: 12px;
            margin-top: 1rem;
            box-shadow: 0 2px 6px rgba(0,0,0,0.05);
        }
        .canvas-container {
            text-align: center;
            margin-top: 1rem;
        }
        .legend {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin: 0.8rem 0;
            font-size: 0.85rem;
        }
        .legend-item {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .legend-color {
            width: 16px;
            height: 16px;
            border-radius: 50%;
        }
        .legend-color.red { background-color: #e31b23; }
        .legend-color.blue { background-color: #1f77b4; }
        .legend-color.green { background-color: #2ca02c; }
        .legend-line { width: 24px; height: 2px; background-color: #ff7f0e; }
        .coord-input {
            margin-bottom: 0.5rem;
        }
        .input-group-custom {
            margin-bottom: 1rem;
        }
        .ext-authority {
            background: #fef9e6;
            padding: 0.75rem 1rem;
            border-radius: 8px;
            margin: 1rem 0;
            font-size: 0.9rem;
            border-left: 3px solid #ffc107;
        }
        .vertical-note {
            font-style: italic;
            margin-top: 5px;
            color: #666;
        }