How to get my hamburger menu to open to the right side of the screen with CSS?

Site URL: https://www.isabelparra.com

Hi All, Trying to get my navigation menu to open to the right side of the screen vs left. Here is a screen shot of what it is opening to now?

Any help will be much appreciated! 

Try adding this to Design > Custom CSS

#header[data-current-styles*="NavRight"] .header-menu {
    left: 0;
    right: auto;
}