@media only screen and (max-width: 320px) {
    .container-fluid {
        padding-left:1px;
        padding-right:1px;
    }
    .jumbotron {
        padding: 0;
    }
    .jumbotron h1 {
        font-size: 26px;
    }
    h3 {
        font-size: 20px;
    }
    .jumbotron p {
        font-size: 16px;
    }
    footer .container {
        padding:0 5px;
    }
}