/* Estilos para la seguridad del formulario */
        .validation-feedback {
            font-size: 0.8rem;
            margin-top: 5px;
            min-height: 15px;
        }
        
        .validation-feedback.valid {
            color: #28a745;
        }
        
        .validation-feedback.invalid {
            color: #dc3545;
        }
        
        .char-counter {
            color: var(--light-text);
            font-size: 0.8rem;
            text-align: right;
            display: block;
        }
        
        .checkbox-group {
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }
        
        .checkbox-group input[type="checkbox"] {
            margin-top: 3px;
        }
        
        .form-messages {
            margin-top: 15px;
            padding: 10px;
            border-radius: 5px;
            display: none;
        }
        
        .form-messages.success {
            background: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }
        
        .form-messages.error {
            background: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
        
        .form-messages.warning {
            background: #fff3cd;
            color: #856404;
            border: 1px solid #ffeaa7;
        }
        
        .spinner {
            display: inline-block;
            margin-left: 10px;
        }
        
        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }
        
        .human-check {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px;
            background: #d4edda;
            border: 1px solid #c3e6cb;
            border-radius: 5px;
            color: #155724;
        }
        
        /* Validación visual */
        .form-control.valid {
            border-color: #28a745;
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%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);
        }
        
        .form-control.invalid {
            border-color: #dc3545;
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath d='m5.8 3.6.4.4.4-.4'/%3e%3cpath d='M6 7v2'/%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);
        }
        
        .security-shield {
            text-align: center;
            margin-top: 20px;
            padding: 10px;
            background: #f8f9fa;
            border-radius: 5px;
            border: 1px solid #dee2e6;
        }