* {
	margin: 0px;
	padding: 0px;
	box-sizing: border-box;
}

body {
	display: flex;
	padding: 20px;
	justify-content: center;
	align-items: center;
	min-height: 100vh;
  	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  	background: black;
}

h1 {
	position: fixed;
	top: 20px;
	left: 20px;
	padding: 7px 20px;
	background: white;
	border-radius: 20px;
	font-size: 18px;
}

#bookcase {
	width: 1200px;
	height: 2000px;
	display: grid;
	grid-template-columns: 1fr;
	grid-template-rows: 1fr 1fr 1fr 1fr;
	justify-content: space-evenly;
	border: 20px solid grey;
	background: #333;
}

.shelf {
	width: 100%;
	display: flex;
	flex-direction: row;
	align-items: bottom;
	justify-content: space-evenly;
	border-bottom: 20px solid lightgrey;
	padding: 10px 10px 0px 0px;
}

img {
	width: 140px;
	height: auto;
	display: block;
	align-self: end;
}