* {margin: 0; padding: 0}
body {background: #efefef; color: #000; font: 100%/260% "Trebuchet MS", Tahoma, Verdana, "Lucida Sans Unicode", Helvetica, Arial, sans-serif; text-align: center;}
h1 {font-size: 200%; font-weight: normal;}
h2 {font-size: 120%; font-weight: bold;}
h3 {font-size: 80%; font-weight: bold;}
#mainDiv {margin-left: auto; margin-right: auto; width: 50%; margin-top: 10%; margin-bottom: 10%; border: 3px solid #e6e6e6; padding: 5%; background: #f6f6f6;}