*{
    margin: 0;
    padding: 0;
}
nav{
    background-color: black;
    color: white;
    
}
li:hover{
    color: grey;

}
ul,li{
    display: inline;

}
h1{
    text-align: center;
}
.box{
    width: 300px;
    height: 300px;
    border-style: solid;
    border-color: black;
    border-width:5px;
    margin: 30px;
    display: inline-block;
    
}
.box:hover{
    background-color: black;
    color: white;
}
.detail{
    background-color: black;
    color: white;
    
}