diff --git a/12/style.css b/12/style.css
index 1911ce1..d9bea0f 100644
--- a/12/style.css
+++ b/12/style.css
@@ -6,12 +6,20 @@ body{
 }
 
 .intro{
-  margin:150px;
+  margin:10%x;
 }
 
 .page_title{
-  font-size:30px;
+  font-size:50px;
+}
+
+
+.intro_text{
+  margin-top:10%;
 }
 
+.sec_title{
+  font-size:30px;
+}