img {
    max-width: 100%;
    height: auto;
    margin: auto;
    padding-bottom: 20px;
    padding-top: 20px;
  }

.jumbotron {
    background-image: url('images/header.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
}

.jumbotron a {
    color: #9370DB;
    text-decoration: none;
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
}

.jumbotron a:hover {
    color: #8A2BE2;
    text-decoration: underline;
}