body {
    background: lightblue url("tlo.jpg") no-repeat fixed center;
        background-size: 100% 100%;
          -moz-background-size: 100% 100%;
}
ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

li {
    float: left;
}

li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

/* Change the link color to #111 (black) on hover */
li a:hover {
    background-color: #111;
}
.active {
    background-color: #4CAF50;
}
.footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    background-color: black;
    color: white;
    text-align: center;
}