body {
    background-color:lightskyblue;
    font-family:Verdana;
}
button {
    color:black;
    background-color:white;
    width:150px;
    height:40px;
    cursor:pointer;
    font-size:20px;
    border:2px solid black;
    border-radius:10px;
}

.center {
    text-align:center;
}