.sistem-standart-katmansiz-menu-responsive-yatay-1 ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.sistem-standart-katmansiz-menu-responsive-yatay-1 li {
  float: left;
  
}

.sistem-standart-katmansiz-menu-responsive-yatay-1 li a {
  display: block;  
  text-align: center;
  padding:5px 10px;
  text-decoration: none;
  
}

.sistem-standart-katmansiz-menu-responsive-yatay-1 li a:hover {
  background-color: #111111;
}