body {
    background-color:black !important ;
}

center {
    margin-top:10% ;
}

h1{
    color: aliceblue;
    font-size: 100px;
}
span{
    color: #008d62;
}
@media only screen and (max-width: 412px) {
    center {
        margin-top:50% ;
    }
   h1{
    font-size: 35px;
   }
}