:root {
    --jumbotron-padding-y: 3rem;
}

body {
    max-width: 430px;
    margin: 0 auto;
}
.jumbotron {
    padding-top: var(--jumbotron-padding-y);
    /*padding-bottom: var(--jumbotron-padding-y);*/
    
    margin-bottom: 0;
}
@media (min-width: 768px) {
    /*    .jumbotron {
            padding-top: calc(var(--jumbotron-padding-y) * 2);
            padding-bottom: calc(var(--jumbotron-padding-y) * 2);
        }*/
        .col-md-4 {
        /* -webkit-box-flex: 0; */
        -ms-flex: 0 0 0%;
         flex: 0 0 100%; 
         max-width: 100%; 
    }

}

.jumbotron p:last-child {
    margin-bottom: 0;
}

.jumbotron-heading {
    font-weight: 300;
}

.jumbotron .container {
    max-width: 40rem;
}

footer {
    padding-top: 3rem;
    padding-bottom: 3rem;
}

footer p {
    margin-bottom: .25rem;
}

.box-shadow { box-shadow: 0 .25rem .75rem rgba(0, 0, 0, .05); }