body{
    background-color: black;
    color: blue;
    text-align: center;
    button{
        background-color: grey;
        color: white;
        border-radius: 5px;
    }
    button:hover{
        background-color: white;
        color: black;
        cursor: pointer;
    }
    footer{
        margin-top: 4cm;
    }
}