how to make navbar visible above all divs
.flexnav{
-webkit-padding-start: 0px;
-webkit-margin-before: 0px;
-webkit-margin-after: 0px;
margin-top: 0px;
margin-right: auto;
margin-bottom: 0px;
margin-left: auto;
width:90%;
position: relative; /* <-- Added */
z-index: 1; /* <-- Added */
}