.input-group-custom {
            margin-bottom: 1rem;
        }
        .unit-note {
            font-size: 0.85rem;
            color: #6c757d;
        }
        .geometry-canvas {
            width: 100%;
            height: auto;
            background-color: #f9f9f9;
            border: 1px solid #ddd;
            border-radius: 8px;
            margin-top: 1rem;
            display: block;
        }
        .canvas-container {
            text-align: center;
            margin-top: 1rem;
        }
        .legend {
            display: flex;
            justify-content: center;
            gap: 1.8rem;
            margin: 0.5rem 0;
            font-size: 0.85rem;
        }
        .legend-item {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .legend-color {
            width: 14px;
            height: 14px;
            border-radius: 2px;
        }
        .legend-color.curve { background-color: #2c7fb8; }
        .legend-color.point { background-color: #d95f02; border-radius: 50%; }
        .legend-color.hline { background-color: #aaa; height: 2px; width: 20px; }