html {
    height: 100%;
    width: 100%;
  }
  
  * {
    box-sizing: border-box;
  }
  
  body {
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url('https://static.vecteezy.com/system/resources/thumbnails/006/691/887/small/yellow-question-mark-background-with-text-space-quiz-symbol-vector.jpg');
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    height: auto;
    
  }
  
  .container {
    margin-right:45%;
    background-color: #fff;
    width: 520px;
    height: 500px;
    border-radius: 10px;
    border: 2px solid black;
    padding: 10px 10px;
    margin-top: 5%;
    margin-bottom: 10%;
    color: black;
    font-family: monospace;
    overflow: hidden;
  }
  
  .header {
    font-size: 1.3rem;
  }
  
  h3 {
    text-align: center;
    margin: 0px -2px;
    padding: 3rem;
    height: 150px;
    border-bottom: 2px dotted black;
  }
  
  ul {
    list-style-type: none;
    padding: 30px;
    width: 480px;
    height: 170px;
  }
  
  ul li {
    font-size: 1.1rem;
    margin: 1rem 0;
    width: 200px;
    display: inline-block;
  }
  
  ul li label {
    cursor: pointer;
  }
  
  button {
    display: flex;
    justify-content: center;
    cursor: pointer;
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    background-color: black;
    border: none;
    color: #fff;
    border-radius: 10px;
    top: 400px;
  }
  button:hover{
    background-color: rgb(54, 53, 53);
  }