@media (min-width:320px)  { /* smartphones, iPhone, portrait 480x320 phones */ 

  .mobile_text_center{
  
  text-align:center !important;
  }
  
}
@media (min-width:481px)  { /* portrait e-readers (Nook/Kindle), smaller tablets @ 600 or @ 640 wide. */ 

  .mobile_text_center{
  
  text-align:center !important;
  }
  
}
@media (min-width:641px)  { /* portrait tablets, portrait iPad, landscape e-readers, landscape 800x480 or 854x480 phones */ 

.mobile_text_center{
  
  text-align:center !important;
  }
}
@media (min-width:961px) {
  
  .mobile_text_center{
  
  text-align:center !important;
}
  
}