:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --medical-red: #dc3545;
            --medical-green: #198754;
            --medical-yellow: #ffc107;
            --medical-orange: #fd7e14;
        }
         
        .page-header {
            background: linear-gradient(135deg, rgba(169, 214, 229, 0.4) 0%, rgba(44, 125, 160, 0.4) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(44, 125, 160, 0.2);
            position: relative;
            overflow: hidden;      color: var(--text-color);
        }
        
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        
        .breadcrumb-item.active {
            color: var(--text-color);
        }
         
        .bsa-comparison-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .bsa-method-card {
            background: white;
            border-radius: 8px;
            padding: 1.25rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            text-align: center;
        }
        
        .bsa-method-card.active {
            border: 2px solid var(--primary-color);
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        .bsa-method-name {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-color);
        }
        
        .bsa-method-value {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        
        .bsa-method-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
        }
         
        @media (max-width: 768px) { 
            .bsa-comparison-grid {
                grid-template-columns: 1fr;
            }
        }
        
        .measurement-system {
            display: flex;
            background-color: var(--light-gray);
            border-radius: 6px;
            padding: 4px;
            margin-bottom: 1.5rem;
        }
        
        .system-btn {
            flex: 1;
            text-align: center;
            padding: 0.75rem;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 600;
        }
        
        .system-btn.active {
            background-color: var(--primary-color);
            color: white;
        }
        
        .toast-container {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 1050;
        }
        
        .action-btn {
            background-color: white;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 0.5rem 1rem;
            margin-left: 0.5rem;
            transition: all 0.3s;
            color: var(--text-color);
        }
        
        .action-btn:hover {
            background-color: var(--light-gray);
            color: var(--primary-color);
        }
        
        .input-group {
            margin-bottom: 1rem;
        }
        
        .reference-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        
        .reference-table th, .reference-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        
        .reference-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        
        .reference-table tr:nth-child(even) {
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        .generating-indicator {
            display: none;
            text-align: center;
            padding: 1rem;
            color: var(--text-muted);
        }
        
        .form-range {
            width: 100%;
            height: 1rem;
            padding: 0;
            background-color: transparent;
            -webkit-appearance: none;
        }
        
        .form-range:focus {
            outline: none;
        }
        
        .form-range::-webkit-slider-thumb {
            width: 1rem;
            height: 1rem;
            margin-top: -0.5rem;
            background-color: var(--primary-color);
            border: 0;
            border-radius: 1rem;
            -webkit-appearance: none;
        }
        
        .form-range::-webkit-slider-runnable-track {
            width: 100%;
            height: 0.5rem;
            cursor: pointer;
            animate: 0.2s;
            background: var(--light-gray);
            border-radius: 0.5rem;
        }
        
        .urine-classification {
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem 0;
            border-left: 5px solid;
            font-weight: 500;
        }
        
        .urine-normal {
            background-color: rgba(40, 167, 69, 0.1);
            border-left-color: var(--medical-green);
        }
        
        .urine-oliguria {
            background-color: rgba(255, 193, 7, 0.1);
            border-left-color: var(--medical-yellow);
        }
        
        .urine-anuria {
            background-color: rgba(220, 53, 69, 0.1);
            border-left-color: var(--medical-red);
        }
        
        .urine-polyuria {
            background-color: rgba(0, 123, 255, 0.1);
            border-left-color: #007bff;
        }
        
        .urine-trend-chart {
            position: relative;
            height: 350px;
            width: 100%;
            margin: 1.5rem 0;
        }
        
        .time-unit-selector {
            display: flex;
            background-color: var(--light-gray);
            border-radius: 6px;
            padding: 4px;
            margin-bottom: 1rem;
        }
        
        .time-unit-btn {
            flex: 1;
            text-align: center;
            padding: 0.5rem;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 500;
            font-size: 0.9rem;
        }
        
        .time-unit-btn.active {
            background-color: var(--primary-color);
            color: white;
        }
        
        .input-history {
            background-color: rgba(44, 125, 160, 0.05);
            border-radius: 8px;
            padding: 1rem;
            margin: 1rem 0;
            border: 1px solid rgba(44, 125, 160, 0.2);
            max-height: 200px;
            overflow-y: auto;
        }
        
        .history-item {
            padding: 0.5rem 0;
            border-bottom: 1px solid rgba(44, 125, 160, 0.1);
            font-size: 0.9rem;
        }
        
        .history-item:last-child {
            border-bottom: none;
        }
        
        .normal-range-indicator {
            display: flex;
            align-items: center;
            margin: 1rem 0;
        }
        
        .range-bar {
            flex-grow: 1;
            height: 8px;
            background: linear-gradient(to right, #dc3545 0%, #ffc107 10%, #28a745 40%, #28a745 100%, #007bff 100%);
            border-radius: 4px;
            margin: 0 1rem;
            position: relative;
        }
        
        .range-marker {
            position: absolute;
            top: -5px;
            width: 2px;
            height: 18px;
            background-color: #333;
        }
        
        .range-label {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        
        .alert-indicator {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-right: 0.5rem;
        }
        
        .alert-critical {
            background-color: rgba(220, 53, 69, 0.1);
            color: var(--medical-red);
        }
        
        .alert-warning {
            background-color: rgba(255, 193, 7, 0.1);
            color: var(--medical-yellow);
        }
        
        .alert-normal {
            background-color: rgba(40, 167, 69, 0.1);
            color: var(--medical-green);
        }
        
        .fluid-balance-calc {
            background-color: rgba(0, 123, 255, 0.05);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border: 1px solid rgba(0, 123, 255, 0.2);
        }
        
        .renal-assessment {
            background-color: rgba(108, 117, 125, 0.05);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border: 1px solid rgba(108, 117, 125, 0.2);
        }
        
        .time-input-group {
            display: flex;
            gap: 1rem;
        }
        
        .time-input {
            flex: 1;
        }
        
        .quick-calc-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        
        .quick-calc-btn {
            padding: 0.5rem 1rem;
            background-color: white;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .quick-calc-btn:hover {
            background-color: var(--light-gray);
            border-color: var(--primary-color);
        }
        
        .quick-calc-btn.active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        
        .age-category {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-right: 0.5rem;
        }
        
        .age-child {
            background-color: rgba(40, 167, 69, 0.1);
            color: #28a745;
        }
        
        .age-adult {
            background-color: rgba(0, 123, 255, 0.1);
            color: #007bff;
        }
        
        .age-elderly {
            background-color: rgba(108, 117, 125, 0.1);
            color: #6c757d;
        }
        
        .faq-section {
            margin-top: 2rem;
        }
    
        .error-message {
            color: var(--medical-red);
            font-size: 0.85rem;
            margin-top: 0.25rem;
            display: none;
        }
        
        .is-invalid {
            border-color: var(--medical-red) !important;
        }
        
        .export-buttons {
            display: flex;
            gap: 0.5rem;
            margin-top: 1rem;
        }
        
        .language-selector {
            position: absolute;
            top: 15px;
            right: 15px;
            z-index: 100;
        }
        
        .language-btn {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 0.25rem 0.5rem;
            font-size: 0.8rem;
            cursor: pointer;
        }
        
        .language-btn.active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        
        .lab-values-container {
            background-color: rgba(169, 214, 229, 0.1);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border: 1px solid rgba(169, 214, 229, 0.3);
        }
        
        .clinical-tips {
            background-color: rgba(255, 193, 7, 0.1);
            border-radius: 8px;
            padding: 1rem;
            margin: 1rem 0;
            border-left: 4px solid var(--medical-yellow);
        }
        
        .medical-alert {
            background-color: rgba(220, 53, 69, 0.1);
            border-radius: 8px;
            padding: 1rem;
            margin: 1rem 0;
            border-left: 4px solid var(--medical-red);
        }
        
        .recommendation-card {
            background: white;
            border-radius: 8px;
            padding: 1.25rem;
            border: 1px solid var(--border-color);
            margin-bottom: 1rem;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }
        
        .recommendation-title {
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .tooltip-custom {
            position: relative;
            display: inline-block;
            border-bottom: 1px dotted #666;
            cursor: help;
        }
        
        .tooltip-custom .tooltiptext {
            visibility: hidden;
            width: 200px;
            background-color: #333;
            color: #fff;
            text-align: center;
            border-radius: 6px;
            padding: 5px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            margin-left: -100px;
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 0.85rem;
            font-weight: normal;
        }
        
        .tooltip-custom:hover .tooltiptext {
            visibility: visible;
            opacity: 1;
        }