ul.topnav
{
   position: absolute;
   top: 0;
   left: 0;
   margin: 0;
   padding: 0;
   display: flex;
}

ul.topnav  li
{
   list-style: none;
}

ul.topnav li a
{
   position: relative;
   display: block;
   padding: 10px 20px;
   text-decoration: none;
   text-transform: uppercase;
   color: #262626;
   font-weight: bold;
}

ul.topnav  li.active a
{
    background: #262626;
	color: #fff;
}

ul.linklist li{
   line-height: 2;
}

.mainframe {
    position: relative;   
    top: 50px;
    left: 10px;    
    width: 95%;
    border: none;
    height: 700px;
}