body {
  font-family: Arial, sans-serif;
  background-color: #f6f8fa;
  margin: 0;
  padding: 0;
}

header {
  background-color: #3b5998;
  color: white;
  text-align: center;
  padding: 20px;
}

main {
  padding: 20px;
}

h2 {
  color: #3b5998;
  border-bottom: 2px solid #ddd;
  padding-bottom: 5px;
}

ul {
  line-height: 1.8;
}

table, th, td {
  border: 1px solid #000; 
  border-collapse: collapse; 
}

th, td {
  padding: 8px;
  text-align:left;
}

td,th {
padding: 6px;
}

footer {
  text-align: center;
  background-color: #eee;
  padding: 10px;
  margin-top:30px;
}