#stred{
border: 1px solid black;
margin: 0 auto;
height: 2000px;
background: black;
}

#hlavicka{
border: 1px solid black;
height: 50px;
background: black;
color: red;
}
#nadmenu{
border: 1px solid black;
margin: 5px;
height: 500px;
background: red;
width: 200px;
float: left;
font-size: 18pt;
}
#obsah{
border: 1px solid black;
margin: 5px;
height: 1600px;
background: red;

}