body {
    background-color: #D3D3D3;
    color: black;
    font-family: Tahoma, "Courier New";
  }
  
table {
    border-collapse: collapse;
    background-color: #c0c0c0;
  }
  
th, td {
    padding: 4px 8px;
    text-align: left;
    border-top: 2px solid #ffffff;
    border-left: 2px solid #ffffff;
    border-bottom: 2px solid #808080;
    border-right: 2px solid #808080;
  }
  
th {
    color: #ffffff;
    background-color: #47716D;
  }

td {
    background-color: #dfdfdf;
}

.main {
    border: 2px solid black
}