style.css

.header{
margin-bottom: 5px;
background-color: lightblue;


}
.container,.header{
width:800px;

padding: 30px;
margin : 0 auto;

border: 2px solid black;
} 
ul{
   
    list-style-type: none;
   
}  
li{
    border: 1px solid blue;
    display: inline;
    margin-left: 3px;
    padding: 10px;
    background-color: lightblue;
}
li a,div a{

    text-decoration: none;
   
}
li:hover{

background-color: lightgoldenrodyellow

}
.active{

    background-color: lightgoldenrodyellow;
}
footer{
    background-color: lightblue;
}