body{
    display: -webkit-flex;
    display: flex;
    -webkit-flex-flow: row wrap;
    flex-flow: row wrap;
}

header, nav, footer{
    -webkit-flex: 1 100%;
    flex:1 100%;
}
header{
      display: -webkit-flex;
	  display:flex;
	  -webkit-flex-flow: row;
	  flex-flow: row;
	  justify-content: flex-start;
	  align-items: center;
}

article{
    -webkit-flex: 7 1 0%;
    flex: 7 1 0%;
}

aside{
    -webkit-flex: 1 1 0%;
    flex:1 1 0%;
}

nav ul {
display: -webkit-flex;
display: flex;
justify-content: flex-start;
align-items: center;
flex-direction: row;
  }