Include this > https://rawgit.com/surajmandalcell/6ffd8d4d75c271271753d4d111e40754/raw/f90930780358332bcb2a2f16cc9053e48a310efc/cssQuick.css

cssQuick.css

/* https://rawgit.com/surajmandalcell/6ffd8d4d75c271271753d4d111e40754/raw/f90930780358332bcb2a2f16cc9053e48a310efc/cssQuick.css */

.center-it-x{
  margin-left: 50%;
  transform: translateX(-50%);
}
.center-it-y{
  margin-top: 50%;
  transform: translateY(-50%);
}  
.center-it-all{
  margin-top: 50%;
  margin-left: 50%;
  transform: translate(-50%, -50%);
}