/* Stile Inline Classico e Professionale */
        /*
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f4f7f9;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }
        */

        .captcha-container {
            background: #ffffff;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            border: 1px solid #dcdfe6;
            width: 320px;
        }

        .captcha-label {
            display: block;
            font-weight: 600;
            margin-bottom: 15px;
            color: #303133;
            font-size: 1.1em;
        }

        .input-group {
            display: flex;
            gap: 10px;
            margin-bottom: 15px;
        }

        input[type="number"] {
            flex: 1;
            padding: 8px 12px;
            border: 1px solid #dcdfe6;
            border-radius: 4px;
            font-size: 1em;
            outline: none;
            transition: border-color 0.2s;
        }

        input[type="number"]:focus {
            border-color: #409eff;
        }

        
        .button_check_captcha {
            background-color: #409eff;
            color: white;
            border: none;
            padding: 8px 15px;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 500;
            transition: background 0.3s;
        }

        .button_check_captcha:hover {
            background-color: #66b1ff;
        }
            

        #feedback {
            margin-top: 15px;
            padding: 10px;
            border-radius: 4px;
            font-size: 0.9em;
            display: none; /* Inizialmente nascosto */
        }

        .success {
            background-color: #f0f9eb;
            color: #67c23a;
            border: 1px solid #e1f3d8;
            display: block !important;
        }

        .error {
            background-color: #fef0f0;
            color: #f56c6c;
            border: 1px solid #fde2e2;
            display: block !important;
        }