.header ul li a { text-shadow: 0px 0px 5px #000000; }

.header-overlap { z-index:1000; left:0; top: 0; right:0; width: 100%; background: none; position: absolute; }
.header-overlap ul li a { background: none; color: #fff; }
.header-overlap ul li a:hover { background: #fff; color: #000; }

.openbtn { text-shadow: 0px 0px 5px #000000; }