.shape-canvas {
            width: 100%;
            background: #f8f9fa;
            border: 1px solid #dee2e6;
            border-radius: 12px;
            margin-top: 1rem;
        }
        .dimension-input-group {
            background: #f8f9fa;
            padding: 0.75rem;
            border-radius: 8px;
            margin-bottom: 0.75rem;
        }
        .unit-hint {
            font-size: 0.8rem;
            color: #6c757d;
            font-style: italic;
        }
        .example-pills {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin: 1rem 0;
        }
        .badge-formula {
            background: #e9ecef;
            color: #2c3e50;
            font-family: monospace;
        }
        .key-concept {
            background: #eef2f7;
            border-radius: 12px;
            padding: 1.2rem;
            margin: 1.2rem 0;
        }
        .ref-link {
            color: var(--primary-color);
            text-decoration: none;
        }
        .canvas-dim-label {
            text-anchor: middle;
            font-size: 12px;
            fill: #2c3e50;
        }
        .verification-table th, .verification-table td {
            padding: 0.5rem;
            border: 1px solid #dee2e6;
        }
        .verification-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1rem 0;
        }
        .unit-conversion-tip {
            background: #fef9e6;
            border-left: 4px solid #f0ad4e;
            padding: 0.5rem 0.75rem;
            border-radius: 6px;
            margin-top: 0.5rem;
            font-size: 0.85rem;
        }
        .warning-rect-torsion {
            background: #fff3cd;
            border-left: 4px solid #ffc107;
            padding: 0.6rem 0.75rem;
            border-radius: 6px;
            font-size: 0.85rem;
            margin-top: 0.75rem;
        }
        .unit-select-group {
            margin-bottom: 1rem;
        }
        .unit-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .adaptive-scale-hint {
            background: #e7f3ff;
            border-left: 4px solid #0d6efd;
            padding: 0.6rem 0.75rem;
            border-radius: 6px;
            font-size: 0.85rem;
            margin-top: 0.75rem;
        }