#cpatchaTextBox {
    padding: 12px 20px;
    display: inline-block;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}
#captcha canvas {
    /*prevent interaction with the canvas*/
    pointer-events: none;
    background-image: url("../../Content/Jquery-Captcha-Plugin/captcha-background-image-3.jpg");
    background-repeat: no-repeat;
}