* {
		box-sizing: border-box;
	}

	body {
		background: #121314;
	}

	body > ul {
		position: absolute;
		top: 20%;
		width: 800px;
		height: 200px; 
		left: 50%;
		margin-left: -500px;
		margin-top: -130px;
	}
 
	ul > li {
		width: 25%;
		list-style-type: none;
		position: absolute;
		top: 5%;
		padding: 20px;
		height: 200px; 
		opacity: 0;
		padding-top: 40px;
		text-align: center;
		transition: 1s opacity; 
	}

	.active {
		opacity: 1;
	}