.jumbotron {
    box-sizing: border-box;
    height: 600px;
    background-color: rgba(0, 0, 0, 0);
  }
  
  .main-button-container {
    margin-top: 175px;
    max-width: 610px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .timer-p {
    margin-top: 40px;
  }
  
  .answer:hover {
    background: pink;
  }
  
  .answer {
    padding-top: 7px;
    height: 45px;
    color: black;
    padding-left: 14px;
    background-color: white;
    border-radius: 4px;
  }
  
  .img-wrong {
    margin-top: 40px;
  }
  
  .first-answer {
    margin-top: 40px;
  }
  
  .reset-button {
    margin-top: 40px;
  }
  
  .summary-correct {
    margin-top: 40px;
  }
  
  body {
    background-color: #DD0506;
    color: white;
  }

  .center-block {
    width:350px;
    height:450px;

  }
 
  #footer {
    position:absolute;
    bottom:0;
    width:100%;
    height:30px;
    text-align:center;
  }