/* Style the header with a grey background and some padding */
*{
    padding: 0;
    margin: 0;
}

.header {
    overflow: hidden;
    background-color: rgb(0, 0, 34);
    padding: 20px 10px;
  }
  
  /* Style the header links */
  .header a {
    float: left;
    color: rgb(255, 255, 255);
    text-align: center;
    padding: 12px;
    text-decoration: none;
    font-size: 18px;
    line-height: 25px;
    border-radius: 4px;
  }
  
  /* Style the logo link (notice that we set the same value of line-height and font-size to prevent the header to increase when the font gets bigger */
  .header a.logo {
    font-size: 25px;
    font-weight: bold;
  }
  
  /* Change the background color on mouse-over */
  .header a:hover {
    background-color: #ddd;
    color: black;
  }
  
  /* Style the active/current link*/
  .header a.active {
    background-color: dodgerblue;
    color: white;
  }
  
  /* Float the link section to the right */
  .header-right {
    float: right;
  }
  
  /* Add media queries for responsiveness - when the screen is 500px wide or less, stack the links on top of each other */
  @media screen and (max-width: 500px) {
    .header a {
      float: none;
      display: block;
      text-align: left;
    }
    .header-right {
      float: none;
    }
  }

  h1{
    float: left;
  }

  main{
    height: auto;
    margin: 0;
    padding: 10px;
    border: 5px solid rgb(3, 131, 41);
    margin: 0;
    text-align: center;
    box-align: center;
    border-radius: 15px;
    background-color: rgba(140, 255, 174, 0.462);
    position: relative;
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 60%;
  }

  body {
    text-align: center;
    background-image: url(https://pbs.twimg.com/media/EyKjbTHWYAQCOe_.jpg);
    background-position: auto;
    background-repeat: no-repeat;
    background-size: cover;
    background-color: rgb(1, 124, 158)
  }

  table {
    border: 1px solid;
    border-collapse: collapse;
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

table, th, td {
    border: 1px solid;
  }
  
  .center {
    margin-left: auto;
    margin-right: auto;
  }