div.my-footer {
    position: absolute;
    color: gray;
    bottom: 0px;
    left: 0px;
    height: 20px;
    width: 100%;
}
div.my-footer span {
    font-size: 13pt;
    position: absolute;
    color: gray;
    left: 15px;
    bottom: 2px;
} 


.center-left {
  position:          relative;
  top:               50%;
  transform:         translateY(-5%);
}
.center-right {
  position:          relative;
  top:               50%;
  transform:         translateY(-5%);
}