h1 {
  color: green;
  font-size: 30px;
  font-family: verdana;
  text-align: center;
  text-indent: 10px;
}

body {
  background-color: white;
}

li {
  font-family: calibri;
  font-size: 30px;
  text-align: left;
  text-indent: 10px;
}

p {
  font-family: calibri;
  font-size: 23px;
  text-align: left;
  text-indent: 10px;
}

a:link {
  color: red;
  text-decoration: none;
  background-color: yellow;
}

a:visited {
  color: blue;
  text-decoration: none;
  display: inline-block;
}

a:hover {
  color: red;
  text-decoration: none;
  background-color: yellow;
}

img {
  max-width: 100%;
  height: auto;
}

.odstavek {
  color: black;
}

nav a {
	display: inline-block;
	color: white;
	padding: 15px;
	margin: 20px;
	background-color: red;
	text-decoration: none;
}

header {
  height: 100px;
  background-image: url('ananaas.jpg');
}

nav {
  padding: 20px;
  background-color: blue;
}

section {
  color: black;
  padding: 40px;
  margin: 20px;
}

footer {
  background-color: red;
  color: black;
  text-align: center;
  padding: 40px;
  margin: 20px;
}
@media (max-width: 1200px) {
	nav a{
		display: block;
		margin: 5px 10px;
		text-align: center;}
	nav a:first-child {margin-top:0px}
	img{max-width:100%}
	h1{color: black}
}	
*{
	box-sizing: border-box;
}

@media (max-width: 600px) {
	
	nav a{margin: 20px 20px}
	img{max-width: 50%}
	body{color: green}
}
a.active{
	background-color: yellow;
}