.equation-box {
            background-color: rgba(70, 130, 180, 0.05);
            border-left: 4px solid var(--primary-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
            font-family: monospace;
            font-size: 1.1rem;
        }
        .legend {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            font-size: 0.8rem;
        }
        .legend-color {
            width: 14px;
            height: 14px;
            display: inline-block;
            border-radius: 2px;
        }
        .canvas-container {
            text-align: center;
            background: #fafafa;
            border-radius: 12px;
            padding: 1rem 0;
        }
        .belt-canvas {
            background: #ffffff;
            border: 1px solid #e0e0e0;
            border-radius: 12px;
            width: 100%;
            height: auto;
        }
        .input-group-custom {
            margin-bottom: 0.8rem;
        }
        .unit-note {
            font-size: 0.8rem;
            color: #6c757d;
        }
        .reference-link {
            font-size: 0.85rem;
        }
        .mode-switch {
            margin: 1rem 0;
        }
        .mode-btn {
            min-width: 140px;
        }