nav {margin:0px 0px 8px 0px; display:block; position:sticky; top:0px; z-index:99; font-family:sans-serif;}
  nav a {color:white; font-weight:bold; margin:1px 8px;}
  nav a:hover {color:lightgreen;}
  nav a > img {height:28px; vertical-align:middle;} /* 23px */
  nav #middle {width:99%; text-align:center; background:black; padding:0px 0px 2px 0px;}
  nav #ledge, nav #redge {position:absolute; top:0px;}
  nav #ledge {left:0px;}
  nav #redge {right:0px;}  
  .edge {padding:0px;}