correct for padding on sizing of h2, h3

Author: possumbilities

src/css/vocabulary.css

@@ -385,6 +385,7 @@ main > aside.sidebar .attention a {
 
 main h2 {
     width: 100%;
+    box-sizing: border-box;
 
     font-family: 'Roboto Condensed';
     font-style: normal;
@@ -394,6 +395,8 @@ main h2 {
 }
 
 main h3 {
+    box-sizing: border-box;
+    
     font-family: 'Roboto Condensed';
     font-style: normal;
     font-weight: 700;