Customization/styling of dropdown menu (alignment, font style, selection, transparency/colour) [7.1]

Site URL: https://crimson-octahedron-ct3w.squarespace.com/config/

Hi there, 

I want to change the styling on the dropdown on my website, I would like the font lower not caps, and to add more padding between the items, and to create a rollover effect so the individual options are clearer, and left align. Please could someone advise on CSS to help me with this. 

Thanks 

What is password?

@tuanphan its 

portraitbyjessica123

Add to Home > Design > Custom CSS

.header-nav-folder-item {
    text-transform: capitalize;
    padding-bottom: 10px;
    text-align: left;
}