.img_size {
	width: 480px;
}
.thumbnail {
  position: relative;
  width: 360px;
  height: 360px;
  overflow: hidden;
}
.thumbnail img {
  position: absolute;
  left: 50%;
  top: 50%;
  min-height:100%;
  min-width:100%;
  /*height: 100%;
  width: auto;*/
  -webkit-transform: translate(-50%,-50%);
      -ms-transform: translate(-50%,-50%);
          transform: translate(-50%,-50%);
}
.placeholder{
    padding: 5px 5px;
}
@media (min-width: 576px){

	.img_size {
	width: 360px;
	}
	.thumbnail{
		width: 270px;
  		height: 270px;
	}
}