header {
	height: 100px;
	font-size:90px;
	padding: 5px;
}

footer {
	position: absolute;
	left:0px;
	right:0px;
	bottom: 0px;
	height:19px;
}

li {
	text-align: center;
	z-index: 3;
	font-size:40px;
	height: 50px;
}

.d {
	position: absolute;
	width: 0;
	height: 0;
	border-left: 25px solid transparent;
	border-right: 25px solid transparent;	
	z-index: 2;
}

.do {
	margin-top: 1px;
	border-top: 50px solid #FFF;
	top: 100px;
}

.du {
	bottom: 20px;
	border-bottom: 50px solid #FFF;
}

#D1 {
	left:calc(100%/3 - 25px);
}

#D2 {
	left:calc(200% /3 - 25px);
}

#D3 {
	left: calc(100%/3 - 50px);
}

#D4 {
	left: calc(200%/3 - 0px);
}

#Mensch {
	bottom: 20px;
	width: calc(100% / 3 - 25px);
	left: 0px;
}

#Design {
	top: 100px;
	width: calc(100% / 3);
	left: calc(100% / 3);
}

#Blog {
	bottom: 20px;
	width: calc(100% / 3 - 25px);
	left: calc(200% / 3 + 25px);
}

#Hintergrund {
	position: absolute;
	top: 0px;
	right: 0px;
	left: 0px;
	bottom: 0px;
	z-index: -1;
	background-image: url("Desktop.jpg");
	background-position: center;
	background-size: cover;
}

#Text {
	top: 201px;
	z-index: 1;
	padding: 10px;
	bottom: 121px;
}