/* Add a black background color to the top navigation */
.topnav {
    background-color: #333;
    overflow: hidden;
}

/* Style the links inside the navigation bar */
.topnav a {
    float: left;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
    
    margin-left: 5%;
    
}
iframe{
    width: 80%;
    height: 400px;
    height:500px;
    float:left;
}

/* 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: #4CAF50;
    color: white;
}
.header{
    text-align: center;
    color: activecaption;
    
}



td, th {
        border: 1px solid #dddddd;
        text-align: left;
        padding: 8px;
}
tr:nth-child(even) {
        background-color: #dddddd;
}
section{
    display:block;
    width:100%;
}