.input-group-custom { margin-bottom: 1rem; }
        .deep-dive { margin: 1.8rem 0; }
        .deep-dive p { text-align: justify; }
        .unit-note { font-size: 0.9rem; color: #6c757d; }
        .coord-input { margin-bottom: 0.5rem; }
        .geometry-canvas { width: 100%; height: auto; background-color: #f9f9f9; border: 1px solid #ddd; border-radius: 8px; margin-top: 1.5rem; display: block; }
        .canvas-container { text-align: center; margin-top: 1rem; }
        .legend { display: flex; justify-content: center; gap: 2rem; margin: 0.5rem 0; font-size: 0.9rem; flex-wrap: wrap; }
        .legend-item { display: flex; align-items: center; gap: 0.3rem; }
        .legend-color { width: 16px; height: 16px; border-radius: 50%; }
        .legend-color.red { background-color: #dc3545; }
        .legend-color.blue { background-color: #0d6efd; }
        .legend-color.gray { background-color: #6c757d; }
        .legend-color.green { background-color: #28a745; }
        .legend-line { width: 24px; height: 3px; background-color: #e67e22; border-radius: 2px; }
        .legend-line-dashed { width: 24px; height: 0; border-top: 2px dashed #e67e22; }
        .unit-toggle { display: inline-flex; gap: 0.25rem; background: #e9ecef; border-radius: 6px; padding: 0.2rem; }
        .unit-toggle .btn-unit { border: none; background: transparent; padding: 0.25rem 0.75rem; border-radius: 4px; font-size: 0.85rem; font-weight: 500; color: #495057; transition: all 0.2s; }
        .unit-toggle .btn-unit.active { background: #fff; color: var(--primary-color); box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
        .unit-toggle .btn-unit:hover { background: rgba(255,255,255,0.5); }
        .form-label .fa-info-circle { color: #6c757d; cursor: help; font-size: 0.9rem; }
        .result-card { background: white; border-radius: 8px; padding: 1.25rem; border: 1px solid #e9ecef; margin-bottom: 1rem; }
        .result-card .label { font-size: 0.85rem; color: #6c757d; text-transform: uppercase; letter-spacing: 0.5px; }
        .result-card .value { font-size: 1.6rem; font-weight: 600; color: var(--primary-color); }
        .result-card .sub-value { font-size: 1rem; color: #495057; }
        .drive-type-selector { display: flex; gap: 0.5rem; margin: 0.5rem 0 1rem 0; }
        .drive-type-selector .btn-check:checked + .btn-outline-primary { background-color: var(--primary-color); color: #fff; border-color: var(--primary-color); }
        .drive-type-selector .btn-outline-primary { border-radius: 20px; padding: 0.3rem 1.2rem; }
        .belt-diagram { background: #f8f9fa; border-radius: 8px; padding: 0.5rem; text-align: center; }
        .belt-diagram svg { max-width: 100%; height: auto; }
        .glossary-term { border-bottom: 1px dotted #999; cursor: help; }
        .reference-list { list-style: none; padding-left: 0; }
        .reference-list li { padding: 0.25rem 0; border-bottom: 1px solid #f0f0f0; }
        .reference-list li:last-child { border-bottom: none; }
        .reference-list .ref-icon { color: var(--primary-color); margin-right: 0.5rem; }
        .accuracy-note { background-color: #e2f0fb; border-left: 4px solid #0d6efd; padding: 0.75rem 1rem; margin: 1rem 0; border-radius: 0 4px 4px 0; font-size: 0.95rem; }
        @media (max-width: 576px) { .result-card .value { font-size: 1.2rem; } .legend { gap: 0.75rem; font-size: 0.75rem; } }