.error-message {
            color: #dc3545;
            font-size: 12px;
            margin-top: 5px;
            display: none;
        }
        
        .is-invalid {
            border-color: #dc3545 !important;
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
            background-repeat: no-repeat;
            background-position: right calc(0.375em + 0.1875rem) center;
            background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
        }
        
        .is-valid {
            border-color: #28a745 !important;
        }
        
        .input-hint {
            font-size: 12px;
            color: #6c757d;
            margin-top: 5px;
            display: block;
        }
        
        .section-required:after {
            content: " *";
            color: #dc3545;
        }
        
        .section-error {
            color: #dc3545;
            font-size: 14px;
            margin-top: 10px;
            display: none;
            text-align: center;
            padding: 10px;
            background: #f8d7da;
            border-radius: 5px;
            border: 1px solid #f5c6cb;
        }
        
        .registros-container:empty + .section-error {
            display: block;
        }
        
        /* Estilos para modales personalizados */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 10000;
            padding: 20px;
        }
        
        .modal-overlay.active {
            display: flex;
        }
        
        .modal {
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            width: 90%;
            max-width: 500px;
            max-height: 80vh;
            overflow-y: auto;
            animation: modalFadeIn 0.3s ease-out;
        }
        
        @keyframes modalFadeIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .modal-header {
            padding: 20px 25px;
            border-bottom: 2px solid #e9ecef;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #111d3d;
            color: white;
            border-radius: 12px 12px 0 0;
        }
        
        .modal-header h3 {
            margin: 0;
            font-size: 20px;
            color: white;
        }
        
        .modal-close {
            background: none;
            border: none;
            font-size: 24px;
            color: white;
            cursor: pointer;
            padding: 0;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: all 0.3s ease;
        }
        
        .modal-close:hover {
            background-color: rgba(255, 255, 255, 0.2);
        }
        
        .modal-body {
            padding: 25px;
            color: #333;
        }
        
        .modal-icon {
            text-align: center;
            font-size: 48px;
            margin-bottom: 20px;
        }
        
        .modal-icon.error {
            color: #dc3545;
        }
        
        .modal-icon.success {
            color: #28a745;
        }
        
        .modal-icon.warning {
            color: #ffc107;
        }
        
        .modal-body p {
            margin-bottom: 15px;
            line-height: 1.6;
        }
        
        .error-list {
            background: #f8f9fa;
            border: 1px solid #e9ecef;
            border-radius: 8px;
            padding: 15px;
            margin: 15px 0;
            max-height: 200px;
            overflow-y: auto;
        }
        
        .error-item {
            padding: 8px 10px;
            margin-bottom: 5px;
            background: white;
            border-left: 4px solid #dc3545;
            border-radius: 4px;
        }
        
        .error-item:last-child {
            margin-bottom: 0;
        }
        
        .modal-footer {
            padding: 20px 25px;
            border-top: 1px solid #e9ecef;
            display: flex;
            justify-content: flex-end;
            background: #f8f9fa;
            border-radius: 0 0 12px 12px;
        }
        
        .modal-btn {
            padding: 10px 20px;
            border: none;
            border-radius: 6px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            min-width: 100px;
        }
        
        .modal-btn-primary {
            background: #111d3d;
            color: white;
        }
        
        .modal-btn-primary:hover {
            background: #0c1630;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(17, 29, 61, 0.3);
        }