.img{text-align: center;}
p.mg {margin-top:45px;}

@media screen and (max-width: 1400px) {
    .subpage br:not(.space) {display: none;}
}
@media screen and (max-width: 1024px) {
    p.mg {margin-top:25px;}
}
@media screen and (max-width: 640px) {

}