suggestion for css

[wagnerfillio]

I have a suggestion on the css theme, in the .btn-header class, you can remove the background-color and add background-color: transparent, for the .btn-header: hover, and .btn-header: focus you can remove the background-color and add background: rgba (0,0, 0, 0.2); at least that part of the css will not be repeated in other themes.