body {
  background-color: #4169E1;
  color: black;
  font-family: Courier;
  text-align: center; 
}
table{
  margin:auto;
  border: 3px solid #000;
  border-collapse: collapse;
}
th{
  border: 3px solid #000;
}
td{
  border: 1px solid #000;
}
tr{
  border: 1px solid #000;
}
#button {
padding: 0;
}
#button li {
display: inline;
}
#button li a {
font-family: Arial;
font-size:11px;
text-decoration: none;
float:left;
padding: 10px;
background-color: black;
color: white;
text-align:center;
}