body {
margin: auto;
- max-width: 800px;
+ width: 80em;
+ background-color: #AEBECE;
}
+h1, h2, h3, h4 { text-align: center }
+h1, h2, h3, h4, strong { color: #900090 }
+pre { background-color: #CCCCCC }
+table, th, td { border: 1px solid black ; border-collapse: collapse }