.property-table th,
        .property-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .deep-dive {
            margin: 1.8rem 0;
        }
        .deep-dive p {
            text-align: justify;
        }
        .unit-note {
            font-size: 0.9rem;
            color: #6c757d;
        }
        .atom-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1rem 0;
        }
        .atom-table th {
            background-color: #e9ecef;
            font-weight: 600;
            padding: 0.6rem 0.4rem;
            border: 1px solid #dee2e6;
            text-align: center;
            font-size: 0.9rem;
        }
        .atom-table td {
            padding: 0.4rem;
            border: 1px solid #dee2e6;
            text-align: center;
            vertical-align: middle;
        }
        .atom-table .form-control-sm {
            width: 100%;
            min-width: 50px;
            text-align: center;
        }
        .atom-table select.form-control-sm {
            min-width: 60px;
        }
        .fc-badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.9rem;
            min-width: 40px;
        }
        .fc-positive {
            background-color: #f8d7da;
            color: #721c24;
        }
        .fc-negative {
            background-color: #d4edda;
            color: #155724;
        }
        .fc-zero {
            background-color: #e2e3e5;
            color: #383d41;
        }
        .total-charge-box {
            background-color: #f8f9fa;
            border-radius: 8px;
            padding: 1rem 1.5rem;
            text-align: center;
            margin: 1rem 0;
            border: 2px solid #dee2e6;
        }
        .total-charge-box .big-number {
            font-size: 2.5rem;
            font-weight: 700;
        }
        .charge-positive {
            color: #dc3545;
        }
        .charge-negative {
            color: #28a745;
        }
        .charge-zero {
            color: #6c757d;
        }
        .remove-btn {
            background: none;
            border: none;
            color: #dc3545;
            cursor: pointer;
            font-size: 1.1rem;
        }
        .remove-btn:hover {
            color: #a71d2a;
        }
        .result-summary {
            background-color: #f8f9fa;
            border-radius: 8px;
            padding: 1.2rem;
            margin: 1.2rem 0;
        }
        .step-calculation {
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
            background-color: #f1f3f5;
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
        }
        .legend {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            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%;
            display: inline-block;
        }
        .legend-color.positive {
            background-color: #dc3545;
        }
        .legend-color.negative {
            background-color: #28a745;
        }
        .legend-color.zero {
            background-color: #6c757d;
        }
        @media (max-width: 768px) {
            .atom-table {
                font-size: 0.8rem;
            }
            .atom-table .form-control-sm {
                min-width: 35px;
                font-size: 0.75rem;
                padding: 0.15rem 0.2rem;
            }
            .atom-table select.form-control-sm {
                min-width: 45px;
                font-size: 0.75rem;
            }
            .fc-badge {
                font-size: 0.75rem;
                padding: 0.15rem 0.5rem;
                min-width: 30px;
            }
            .total-charge-box .big-number {
                font-size: 1.8rem;
            }
        }