body{
    background:linear-gradient(rgba(0, 0, 0, 0.7),rgba(0, 0, 0, 0.7)),url(assets/bridge.jpg);
    width:100%;
    background-position:center;
    background-repeat:no-repeat;
    background-size:cover;
    vertical-align:middle;
    .container{
        font-size:larger;
        background-color: rgba(0, 0, 0, 0.6);
        margin-top:35px;
    }
}