.advent-calendar__day {
	position: relative;
	float: left;
	width: 15%;
	height: 100px;
	margin: 10px 10px 0 0;
}

.advent-calendar__day--future {
	background-size: contain;
	background-repeat: no-repeat;
}

.advent-calendar__day-number {
	position: absolute;
	bottom: 0;
	right: 0;
	padding: 0.1em;
	font-size: 2.5em;
	line-height: 1;
	background-color: white;
}