header {
min-width: 600px;
height: 150px;
}
main {
min-width: 350px;
margin-left: 250px;
}
nav {
width: 250px;
float: left;
}
header {
min-width: 600px;
height: 150px;
}
main {
min-width: 350px;
margin-right: 250px;
}
nav {
width: 250px;
float: right;
}