diff --git a/style.css b/style.css
index c1995d6ea5c4d681c8b47c9fdac56b0a2cf53229..0ab316dcb0e536325becd16f5582a4c3a4eae7b6 100644
--- a/style.css
+++ b/style.css
@@ -8,11 +8,18 @@ tt, code, pre {
     font-family: "Inconsolata", "Andale Mono", monospace;
 }
 
-/*
-code {
-    font-size: 16px;
-}
-*/
+/* Controla o título. */
+#header {
+    text-align: center;
+    border-bottom: 1px solid black;
+    margin-bottom: 20px;
+}
+
+/* Controla o sumário. */
+/* #TOC { display: block; } */
+/* h1.title {} */
+/* h4.author {} */
+/* code { font-size: 16px; } */
 
 pre code {
     font-size: 14px;