@media (max-width:800px) {

    nav.navbar {
        background-color: #FFF;
        width: 100%;
        padding: 1rem .5rem;
    }
 
    .header {
        display: none;
    }

    .contato {
        display: none;
    }

    .navbar-brand {
        display: block;
    }

    footer {
        position: fixed;
        bottom: 0;
        width: 100%;
    }
}