* {
  box-sizing: border-box;
}
/* Style the header */
/*header {
  background-color: #CCFF00;
  padding: 30px;
  text-align: center;
  font-size: 35px;
  color: #CCFF00;
}
*/

/* Create two columns/boxes that floats next to each other */
nav {
  float: left;
  width: 30%;
  height: 300px; /* only for demonstration, should be removed */
  background: #ccc;
  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: #f1f1f1;
  height: 300px; /* only for demonstration, should be removed */
}

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

/* Style the footer */
footer {
  background-color: #777;
  padding: 10px;
  text-align: center;
  color: white;
}

h1d3 {
    font-family: Arial, sans-serif;
	font-size: 20px;
	font-weight: normal;
	color: black;
}
h1d3r {
    font-family: Arial, sans-serif;
	font-size: 22px;
	font-weight: normal;
	color: purple;
}

h1d3r:hover {
	color: green;
	font-weight: bold;
}

h1d3b {  
    font-family: Arial, sans-serif;
	font-size: 30px;
	color: blue;	
	font-weight: bold;
}

/* 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;
  }
h1d3b {  
    font-family: Arial, sans-serif;
	font-size: 20px;
	color: blue;	
	font-weight: bold;
   }  
h1d3 {
    font-family: Arial, sans-serif;
	font-size: 17px;
	font-weight: normal;
	color: black;
 }
h1d3r {
    font-family: Arial, sans-serif;
	font-size: 19px;
	font-weight: normal;
	color: purple;
 }   
}