body {
  margin: 0;
}
#loading-screen {
  background-color: rgba(25,25,25,0.7);
  height: 100%;
  width: 100%;
  position: fixed;
  z-index: 9999;
  margin-top: 0;
  top: 0;
  text-align: center;
}
#loading-screen img {
  width: 100px;
  height: 100px;
  position: relative;
  margin-top: -50px;
  margin-left: -50px;
  top: 50%;
}
/* loader para el submit */
#loading_oculto{
  background-color: rgba(25,25,25,0.7);
  height: 100%;
  width: 100%;
  position: fixed;
  z-index: 9999;
  margin-top: 0;
  top: 0;
  text-align: center;
  visibility:hidden;
}
#loading_oculto img {
  width: 100px;
  height: 100px;
  position: relative;
  margin-top: -50px;
  margin-left: -50px;
  top: 50%;
}