https://11u.f99.myftpupload.com/
I had to go through the inspection to find the solution for the full screen mobile menu. I needed to also get rid of the border lines. below is the code used. Its very frustrating that there is no customization features on for the mobile menu!

.mobile-nav.wd-side-hidden.wd-side-hidden-nav.wd-left.wd-opener-arrow.wd-opened {
width: 100%;
}
.whb-header {
margin-bottom: 0px;}

html .wd-nav-mobile > li > a {
letter-spacing: 2px;
}

.wd-nav-mobile>li>a, .wd-nav-mobile>li>ul li>a {

border-bottom: 0px solid var(–brdcolor-gray-300);
}