.menu{
          display: block;
          padding-left: 20%;
          padding-right: 20%;    
        }

.submenu{
        display: block;
        padding-left: 20%;
        padding-right: 20%;    
    }

a.skip-main {
    left:-999px;
    position:absolute;
    top:auto;
    width:1px;
    height:1px;
    overflow:hidden;
    z-index:-999;
    }

 a.skip-main:focus, a.skip-main:active {
                    color: white;
                    background-color: black;
                    left: auto;
                    top: auto;
                    width: 30%;
                    height: auto;
                    overflow: auto;
                    margin: 10px 35%;
                    padding: 5px;
                    border-radius: 15px;
                    border: 4px solid lightblue;
                    text-align: center;
                    font-size: 1.2em;
                    z-index: 999;
                }