* {
  box-sizing: border-box;
}

body {
background-image: url("sno.png");
background-color: #FFFFFF;
  margin-top: 25px;
  margin-bottom: 25px;
  margin-right: 75px;
  margin-left: 75px;
}


header {
  background-color: #FF0000;
  padding: 10px;
  text-align: left;
}

/* Container for flexboxes */
section {
  display: -webkit-flex;
  display: flex;
}


nav {
  -webkit-flex: 1;
  -ms-flex: 1;
  flex: 1;
  background: #C0C0C0;
  padding: 10px;
}



article {
  -webkit-flex: 4;
  -ms-flex: 4;
  flex: 4;
  background-color: #FFFFFF;
  padding: 10px;
}



/* Responsive layout - makes the menu and the content (inside the section) sit on top of each other instead of next to each other */
@media (max-width: 600px) {
  section {
    -webkit-flex-direction: column;
    flex-direction: column;
  }
}