h1 {
    color: #71fafc !important;
}

.jumbotron {
    background-image: url('https://i.imgur.com/XXI3y4g.jpg') !important;
    background-size: cover !important;
}

.center {
    display: block !important;
    margin-left:auto !important; 
    margin-right: auto !important;
    width: 50% !important;
}

div.a {
    margin-left: auto !important;
    margin-right: auto !important;
    width: 50% !important;
    text-align: center;
}

body {
    background-color: black !important;
}

p {
    color: white !important;
}