How to reduce height of Fields in Form Block

To reduce height of Fields in Form Block

You can use these CSS code to Custom CSS box

div.form-block input {
    padding-top: 0px !important;
    padding-bottom: 0px !important;
    height: 30px !important;
}
div.form-block textarea {
    padding-top: 0px !important;
    padding-bottom: 0px !important;
    height: 80px !important;
    min-height: unset !important;
}

Result