.sidenav {
  height: 100%;
  width: 300px;
  position: fixed;
  z-index: 1;
  top: 52px;
  left: 0;
  background-color: #F8F8F8;
  overflow-x: hidden;
  padding-top: 20px;
  border-right: 1px solid #ccc;
}

.sidenav a {
  margin-top: 35px;
  margin-left: 10px;
  padding: 6px 8px 10px 16px;
  text-decoration: none;
  font-size: 15px;
  color: #818181;
  display: block;
  letter-spacing: 1px;
}
.sidenav a:hover{
  border-left: 4px solid #0C5DB7;
}