.collage {
  width: 100%;
  overflow: hidden;
}

.collage img {
	float:left;
  	width: calc(50% - 40px);
  	border: 4px solid white;
  	border-radius: 8px;
  	box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  	transition: transform 0.3s ease;
	margin: 20px;
}


.collage img:hover {
  	transform: scale(1.05) rotate(0deg);
  	z-index: 10;
}