body {
margin-top: 75px; /* 100px is double the height of the navbar - I made it a big larger for some more space - keep it at 50px at least if you want to use the fixed top nav */
}
footer {
margin: 50px 0;
table {
background-color:#e0e0ff
tbody td, th {
border: 1px solid black;
padding: 3px 7px 2px 7px;
thead td, th {
font-weight: bold;
tbody tr:nth-child(odd) {
background-color:#d0d0ff