.navigation {
    margin-top:100px;
    
}
.navigation a{
    text-decoration:none;
    
}

.navigation ul{
    background:yellow;
    margin:0 auto;
}

.navigation li{
    float:left;
    padding-right:20px;
    padding-left:20px;
    
    font-size:20px;
    list-style-type: none;
    background:yellow;
    
}
.navigation li:first-child{
    padding-left:10px;
    
}
.navigation li:last-child{
    padding-right:10px;
    
}
.navigation li:hover{

    background:blue;
    
}