imitate Planète Casio's style in the previewer

html-preview.html

@@ -26,9 +26,30 @@
         margin: 8px 8px 8px 0;
         padding: 8px;
         background: white;
-        background: #f4f6f2;
         overflow: auto;
       }
+
+      /* Style inherited from Planète Casio */
+
+      body {
+        font-size: 13px;
+        font-family: "Arial", "Verdana";
+        line-height: 1.428571429;
+      }
+      h1 {
+        color: #be1818;
+        font-weight: bold;
+        font-size: 23px;
+      }
+      h2 {
+        color: #be1818;
+        font-weight: bold;
+        font-size: 18px;
+      }
+      h3 {
+        font-weight: bold;
+        font-size: 17px;
+      }
     </style>
   </head>
 

tutorial.css

@@ -3,3 +3,9 @@ div.correct {
   padding: 8px;
   margin-top: 8px;
 }
+
+figure img {
+	border: 2px solid #e0e0e0;
+	border-radius: 2px;
+	padding: 2px;
+}