* {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: #edddbe;
}

/* Style the header */
header {
  background-color: #91cfce;
  font-family: Cambria;
  padding: 30px;
  text-align: center;
  font-size: 35px;
  color: navy;
}

/* Create two columns/boxes that floats next to each other */
nav {
  float: left;
  height: 70%;
  width: 30%;
  background: #ccbfa5;
  padding: 20px;
}

/* Style the list inside the menu */
nav ul {
  list-style-type: none;
  padding: 0;
}

article {
  float: left;
  padding: 20px;
  width: 70%;
  background-color: transparent;
}

/* Clear floats after the columns */
section:after {
  content: "";
  display: table;
  clear: both;
}

/* Style the footer */
footer {
  background-color: #78b3b2;
  padding: 10px;
  text-align: center;
  color: navy;
}

/* unvisited link */
a:link {
  color: blue;
}

/* visited link */
a:visited {
  color: blue;
}

/* mouse over link */
a:hover {
  color: orange;
}

/* selected link */
a:active {
  color: green;
}

/* Responsive layout - makes the two columns/boxes stack on top of each other instead of next to each other, on small screens */
@media (max-width: 600px) {
  nav, article {
    width: 100%;
    height: auto;
  }
}