Inner shadow on Slide Show and/or shadow on header

Site URL: https://fnt-design.com

Hello all– I've been attempting to find somewhere how I might add some inner shadow along the top & bottom of the slideshow-gallery element, or alternatively just a drop shadow on the header.

I've tried to following code for the latter with no luck:

/*Add drop shadow to header*/
.Header {
-webkit-box-shadow: 0px 3px 15px rgba(100, 100, 100, 0.49);
-moz-box-shadow: 0px 3px 15px rgba(100, 100, 100, 0.49);
box-shadow: 0px 3px 15px rgba(100, 100, 100, 0.49);
}

Thanks!

Add to Home > Design > Custom CSS

header.Header.Header--top {
    -webkit-box-shadow: 0px 3px 15px rgba(100, 100, 100, 0.49);
    -moz-box-shadow: 0px 3px 15px rgba(100, 100, 100, 0.49);
    box-shadow: 0px 3px 15px rgba(100, 100, 100, 0.49);
}
main.Index {
    margin-top: 10px;
}