.nav1 {
    position: relative;
    top: 0;
    width: 100%;
    text-align: center;
}

.li1 {
    float: left;
}

.ul1 {
    display: inline-block;
    list-style-type: none;
    padding: 0;
    border-radius: 1.0vw;
    overflow: hidden;
    background-color: grey;
}

.an1 { 
    display: block;
    color: white;
    font-size: 2.0vw;
    text-decoration: none;
    /*argin-left: 0.5vw;
    margin-right: 0.5vw;*/
    padding: 0.5vw 0.5vw;
}

/*
.temp {
    display: none;
}
*/

.an1:hover {
    background-color: lightgreen;
}