html, body
{
height: 100%;
margin: 0; padding: 0;
}

body
{
display : table;
width: 100%;
}

header
{
margin-top:30px;
vertical-align:top;
margin-left: 30px;
margin-right: 180px;
line-height: 50%
}

nav
{
padding: 10px;
margin-left: 20px;
float: left;
width: 200px;
border: 1px solid black;
}

section
{
margin-left: 240px;
}

article, aside
{
text-align: justify;
}

aside
{
padding: 10px;
margin-right:20px;
min-height: 200px;
float: right;
width: 200px;
border: 1px solid black;
}

article
{
background-color: silver;
font-size: 24px;
margin-left: 20px;
margin-right:260px;
border: 1px solid black;
}

footer
{
 display : table-row;
}

.flotte {
float:left;
}