html {
    background: url("../images/atlanta.jpg") no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    color: #000;
}
body {
    background: transparent;
}
.container{
    width: 90%;
    background-color: rgba(255, 255, 255, 0.8);
    min-height: calc(100vh - 5.5em);
}
footer {
    /*background-color: rgba(255, 255, 255, 0.8);*/
    text-align: center;
    bottom: 0;
    width: 100%;
    height: 60px;
    line-height: 60px;
    margin-top: 1em;
}