:root {
  --main-color: #007977;
}

*{
	margin: 0; padding: 0;
}
body {
	font-family: arial, helvetica;
	font-size: 0.8rem;	
	line-height: 1.4;
	background-color: #f4f4f4;
	overflow-y: scroll;
	box-sizing: content-box;
}

.wrapper {
	max-width: 900px;
	margin: 30px auto 0;

}

header {
	box-shadow: 0 2px 2px 0 rgb(0 0 0 / 14%), 0 3px 1px -2px rgb(0 0 0 / 20%), 0 1px 5px 0 rgb(0 0 0 / 12%);
	border-radius: 5px;
	overflow: hidden;
}

header img {
	width: 100%;
	height: auto;
	display:block;
}

.flex-container {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	margin-top: 1rem;
}

	
	
nav {
	flex: 0 0 23%;
}
nav a,
nav a:visited,
nav a:active,
nav a:focus {
	background-color: var(--main-color);
	display: flex;
	justify-content: center;
	align-items: center;
	height: 50px;
	text-decoration: none;
	color: #fff;
	margin-bottom: 3px;
	border-radius: 5px;
	box-shadow: 0 2px 2px 0 rgb(0 0 0 / 14%), 0 3px 1px -2px rgb(0 0 0 / 20%), 0 1px 5px 0 rgb(0 0 0 / 12%);
	cursor: pointer;
}
nav a:hover,
nav a.aktiv {
	background-color: #035453;
}



main {
	background-color: #fff;
	flex: 0 0 67%;
	padding: 2rem;
	border-radius: 5px;
	box-shadow: 0 2px 2px 0 rgb(0 0 0 / 14%), 0 3px 1px -2px rgb(0 0 0 / 20%), 0 1px 5px 0 rgb(0 0 0 / 12%);
}




/* Formatierung */
section {
	margin: 0 0 1.5rem 0;
	padding: 0 0 1.5rem 0;
	border-bottom: 1px solid #ddd;
}

h1 {
	margin: 0 0 .5rem 0;
	color: var(--main-color);
	font-size: 1.5rem;
}

h2 {
	margin: 0;
	color: #333;
	font-weight: 600;
	font-size: 1rem;
	margin: 0 0 .7rem 0;
}

h3 {
	color: #333;
	font-size: .9rem;
	margin: 0 0 5px 0;
}

h4 {
	margin: 0 0 5px 0;
	color: #666;
	font-size: .8rem;
}
p {
	color: #666;
	margin: 0 0 1rem 0;
}

p:last-child {
	margin: 0;
}

ul, ol {
	color: #666;
	margin: 0 0 .5rem 2rem;
}

ol.alpha {
	list-style-type: lower-alpha;
}

a,
a:visited,
a:active,
a:focus {
	text-decoration: none;
	color: var(--main-color);
}

small {
	display: block;
	margin-top: 2rem;
}



@media (max-width: 768px) {
	.wrapper {
		margin: 0;	
	}
	
	header {
		box-shadow: none;
		border-radius: 0;
	}

	.flex-container {
		display: block;
		margin: 0;
	}
	
	nav {
		margin-bottom: 0;
		display: flex;
		justify-content: space-between;
	}
	
nav a,
nav a:visited,
nav a:active,
nav a:focus {
		flex: 0 0 50%;
		border-radius: 0;
		height: 40px;
		box-shadow: none;
	}
	
	main {
		padding: 2rem;
		border-radius: 0;
		box-shadow: none;
	}
}