Docs: Making HAL titles match site

Bug: 12228517
Change-Id: Id7f6509511f5450206c3a1791556295b320e1586
diff --git a/hal_doxygen.css b/hal_doxygen.css
index 6e63946..a3e7d9c 100644
--- a/hal_doxygen.css
+++ b/hal_doxygen.css
@@ -1,3 +1,11 @@
+.title {
+    color:#333;
+    font-size: 34px;
+    margin: 36px 0 27px;
+    padding:0 0 10px;
+    font-weight:300;
+}
+
 #header {
   padding: 1.2em 0 0.2em 0;
   margin: 10px 120px;