Docs/Examples: Minor css tweak.

docs/index.html

@@ -13,6 +13,10 @@
 				font-style: normal;
 			}
 
+			*{
+				box-sizing: border-box;
+			}
+
 			html {
 				height: 100%;
 			}

examples/index.html

@@ -13,6 +13,10 @@
 				font-style: normal;
 			}
 
+			*{
+				box-sizing: border-box;
+			}
+
 			html {
 				height: 100%;
 			}