/* Add a black background color to the top navigation */
.topnav {
    background-color: #333;
    overflow: hidden;
    position: fixed;
    top: 0;
    width: 100%;
}

/* Style the links inside the navigation bar */
.topnav a {
    float: left;
    color: #f2f2f2;
    text-align: center;
    padding: 10px 12px;
    text-decoration: none;
    font-size: 18px;
}

/* Change the color of links on hover */
.topnav a:hover {
    background-color: #ddd;
    color: black;
}

/* Add a color to the active/current link */
.topnav a.active {
    background-color: #44926D;
    color: white;
}

.main {
	margin-top: 80px; /* whitespace to top navigation */
	font-size: 20px;
	text-align: center;
}

h3 {
	padding-top: 15px;
}

img {
     max-width: 100%; /* responsive image-width */
    height: auto;
}