/* responsives Layout */

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

/* Mobile first - alle Dokument-Blöcke bekommen 100% Breite */
header, nav, nav a, article, section, aside, footer {
  flex: 1 100%;
}

header {
  display: flex;
  flex-flow: row wrap;
}
header * {
  flex: 1 1 0%;
}
header img {
  flex: 0 0 150px;
}
header nav {
  flex: 1 1 100%;
}
nav ul {
  display: flex;
  flex-direction: column;
}
nav li {
  list-style-type:none;
  flex: 1 1 100%;
}
footer {
  display: flex;
  flex-flow: row wrap;
}
footer * {
  flex: 1 1 0%;
  justify-content: space-between;
}

/* Smart Phones und Tablets mit mittlerer Auflösung */
@media all and (min-width: 35em) {
nav ul {
  flex-direction: row;
}
nav li {
  flex: 1 1 0%;
}
article {
  order: 2;
}
#news {
  flex: 1 auto;
  order: 3;
}
aside {
/* durch auto werden die beiden asides in eine Zeile gesetzt */
  flex: 1 auto;
  order: 4;
}
footer {
  order: 5;
}
}

/* Large screens */
@media all and (min-width: 50em) {
  article {    /* Der Article wird 2.5x so breit wie die beiden asides! */
    order: 3;
    flex: 3 1 0%;
  }
  aside {
    flex: 1 1 0%;
  }
  #news {
    flex: 1 1 0%;	  
    order: 2;
  }
}