.dropdown {
  position: fixed;
  top:0; left:0;
  display: inline-block;
  cursor:pointer;
  z-index:999; 
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 250px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  padding: 8px 12px;
  z-index: 999;
  font-family:arial;
  font-weight:600;
  font-size:22px;
  line-height:40px;
  text-decoration:underline;
}

.dropdown:hover .dropdown-content {
  display: block;
  cursor:pointer;
  background-color: #000;
  color:yellow;
}
.sdhome{font-size:25px; font-weight:800; font-family:arial; background:yellow; padding:0 9px;}
a.dk:link, a.dk:hover {color:#00ff00;} a.dk2 {color:#fff;}
.invert{-webkit-filter: invert(100%);}