html, body {
    margin: 0;
    padding: 0;
  }
  
  .jumbotron {
    font-family: 'Roboto', sans-serif;
    padding: 150px 0;
    background: url("../images/backgroundmonalisa.jpg") center center;
    background-size: cover;
    text-align: center;
    color: #FFF;
    position: relative;
  }
  
  .jumbotron h1 {
    font-size: 70px;
    margin-bottom: 0;
    color: #fff;
  }
  
  .jumbotron p {
    font-family: 'Roboto';
    font-size: 30px;
    margin: 0 0 30px;
    color: #666;
  }
  
  .button {
    display: inline-block;
    border: 2px solid #fff;
    color: #fff;
    text-decoration: none;
    transition: 0.3s;
  }
  
  .button:hover {
    background: #fff;
    color: #000;
  }