.logo 
{
  width: 100%;
}
.preloader {
   position: absolute;
   top: 25%;
   left: 25%;
   width: 50%;
   height: 50%;
   z-index: 9999;
   background-image: url('../img/logos/loading1.gif');
   background-repeat: no-repeat; 
   background-position: center;
}