* {
  box-sizing: border-box;
}


body {
  font-family: Arial, Helvetica, sans-serif;
style="background-color: #f1f1f1;"
}

/* Style the header */
header {
  background-color: #CCFFCC;
  padding: 2px;
  text-align: center;
  font-size: 12px;
  color: black;
  position: -webkit-sticky;
  position:  sticky;
  top: 0;
}
      
      
article {
  float: left;
  padding: 20px;
  width: 75%;
  background-color: #f1f1f1;
/*  height: 300px; */

}

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

/* Style the footer */
footer {
  background-color: #CCFFCC;
  width: 100%;
  padding: -10px;
  text-align: left;
  color: black;
  position: fixed;
  bottom: 0;
  right: 0;
}

/* 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;
  }
}