.main {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  }

  * {
    box-sizing: border-box;
  }
  
  .header {
    padding: 30px;
    text-align: center;
  }

  .header h1 {
    font-size: 50px;
    font-family: "Courier New", Courier, monospace;
    text-align: center;
    color: rgb(250, 200, 50);
  }
  
  navbar{
    text-align: center;
  }

  .topnav {
    position: relative;
    overflow: hidden;
  }

  .topnav a {
    display: inline-block;
    color: rgb(255, 255, 255);
    text-align: center;
    padding: 16px 20px;
    text-decoration: none;
    font-size: 18px;
    font-family: "Courier New", Courier, monospace;
    border: 1px solid rgb(250, 200, 50);
  }

  .topnav a:hover {
    background-color: rgb(30, 30, 30);
  }
  
  .topnav a.active {
    background-color: rgb(250, 200, 50);
    color: rgb(0, 0, 0);
  }

  
  body {
    background-color: rgb(50, 50, 50);
    margin: 0;
    padding: 10px;
    font-family: "Courier New", Courier, monospace;
  }
 
  .card {
    background-color: rgb(30, 30, 30);
    color: rgb(255, 255, 255);
    border: 1px solid rgb(250, 200, 50);
    padding: 20px;
    margin-top: 20px;
    margin-left: auto;
    margin-right: auto;
    width: 65%;
  }

  .card h2 {
    color: rgb(250, 200, 50);
  }

  .card2 {
    background-color: rgb(30, 30, 30);
    color: rgb(255, 255, 255);
    border: 1px solid rgb(250, 200, 50);
    padding: 20px;
    margin-top: 20px;
    margin-left: auto;
    margin-right: auto;
    width: 65%;
    text-align: center;
  }

  .card2 h2 {
    color: rgb(250, 200, 50);
  }

  .row {
    margin-left: auto;
    margin-right: auto;
  }

  .row a:link, a:visited, a:hover, a:active {
    text-decoration: none;
  }

  .row,
  .row > .column {
  padding: 8px;
  }

  .column {
    float: left;
    width: 25%;
  }

  .row:after {
    content: "";
    display: table;
    clear: both;
  }

  .content {
    background-color: rgb(30, 30, 30);
    color: rgb(255, 255, 255);
    border: 1px solid rgb(250, 200, 50);
    padding: 10px;
  }

  .content h3 {
    color: rgb(250, 200, 50);
    text-align: center;
  }

  .content:hover {
    border: 1px solid rgb(255, 255, 255)
  }

  @media screen and (max-width: 900px) {
    .column {
      width: 50%;
    }
  }
  
  @media screen and (max-width: 600px) {
    .column {
      width: 100%;
    }
    .topnav a {
      display: list-item;
    }
    .card {
      width: 100%;
    }
    .card2 {
      width: 100%;
    }
  }

  .footer {
    padding: 20px;
    text-align: center;
    margin-top: 20px;
    color: rgb(250, 200, 50);
  }