body {
   
    font-family: Georgia, 'Times New Roman', Times, serif;
    font-size: 16px;
    color: blue;
    background-color: lightgrey;
}

ol > li {
    list-style-type: upper-roman;
}
nav{
  display: flex;
  justify-content: center;
  gap: 10px;
}
a:link {
    color: dodgerblue;
  }
  
  a:visited {
    color: blueviolet;
  }

  a:hover {
    color: black;
  }
  
  a:active {
    color: gold;
  }

  th {
      color:black;
      text-align: left;
  }

  tr , td, th {
      border: 1px solid black;
      padding: 10px;
  }
  table {
    margin: 10px;
    
    border: 2px solid black;
    border-collapse: collapse;
  }

  tr:nth-child(even) {background-color: white;}