.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;
        }
        .bmi-canvas {
            width: 100%;
            height: 120px;
            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: 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: 4px;
        }
        .legend-color.underweight { background-color: #3498db; }
        .legend-color.normal { background-color: #2ecc71; }
        .legend-color.overweight { background-color: #f39c12; }
        .legend-color.obese { background-color: #e74c3c; }
        .bmi-pointer {
            width: 0;
            height: 0;
            border-left: 10px solid transparent;
            border-right: 10px solid transparent;
            border-top: 15px solid #000;
            position: relative;
            top: -10px;
        }
        .category-badge {
            font-size: 1.4rem;
            font-weight: 600;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            display: inline-block;
        }
        .badge-underweight { background-color: #3498db; color: white; }
        .badge-normal { background-color: #2ecc71; color: white; }
        .badge-overweight { background-color: #f39c12; color: white; }
        .badge-obese { background-color: #e74c3c; color: white; }