.bn li:hover a{
font-weight:bold;}
  #nav li img{  position: relative;
    top: 3px;
    margin-right: 7px;}

#nav li img{
 transition: all 0.5s ease-in-out;
    -webkit-transition: all 0.5s ease-in-out;
    -moz-transition: all 0.5s ease-in-out;
    -o-transition: all 0.5s ease-in-out;}
#nav li:hover img{

 transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    -ms-transform: rotate(360deg);}