body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    text-align: center;
    height: 100vh;
  }
  
  header {
    background-color: #3498db;
    color: #fff;
    padding: 20px 0;
  }
  
  h1, h2 {
    margin: 0;
    padding: 0;
  }
  
  h1 {
    font-size: 2em;
  }
  
  h2 {
    font-size: 1.5em;
  }
  
  main {
    padding: 314px 0;
  }
  
  .container {
    width: 80%;
    margin: 0 auto;
  }
  
  .content-wrapper {
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin: 0 auto;
    max-width: 600px;
  }
  
  p {
    font-size: 1em;
    line-height: 1.5;
    margin-bottom: 15px;
  }
  
  #time-counter {
    font-size: 1.2em;
    font-weight: bold;
    margin-top: 20px;
  }
  
  footer {
    background-color: #f1f1f1;
    padding: 10px 0;
  }