hello,

I would like to change smaller margin size at smartphone view.
Thank you for taking care of it.

Add this code to your file: css/custom.css

@media (max-width: 480px) {
.uk-container {
padding-right: 20px;
padding-left; 20px
}
}

We are committed to help you with any type of support query, however we can't provide extensive help in terms of customizations. In general customizations may look simple but you will require solid knowledge of web technologies and programming skills to do them or hire a professional who can do it for you.