#header 

.dropmenu ul li a {
  color: gray;
}

.dropmenu ul li a.active,
.dropmenu ul li a:focus,
.dropmenu ul li a:hover {
  color: LightSteelBlue !important;
}

.treemenu li a {
  color: gray;
}

.treemenu li a.active,
.treemenu li a:focus,
.treemenu li a:hover {
  color: LightSteelBlue!important;
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
 }

.img {
  width: 100%;
  max-width: 100%;
}