#gallery-1 {
  -webkit-user-select: none;
  -moz-user-select: none;  
  user-select: none;
  
  margin: 0 auto;
}

@media only screen 
and (max-width : 900px) {

	#gallery-1 {
		width: 500px;
	}
	
}

@media only screen 
and (min-width : 900px) {
	#gallery-1 {
		width: 825px;
	}
}