body { font-size: 90%; font-family: Optima, sans-serif; }
h1 { font-size: 300%; }
h2 { font-size: 200%; }
h3 { font-size: 100%; font-weight: bold; }
h4 { font-size: 50; }

body { margin-left: 10%; margin-right: 10%; }

table.centered {
   margin-left: auto;
   margin-right: auto;
}