Tweak code padding

Author: bradlc

src/styles.js

@@ -620,16 +620,16 @@ module.exports = {
         paddingLeft: em(6, 18),
       },
       'h2 code': {
-        paddingTop: em(6, 36),
-        paddingRight: em(8, 36),
-        paddingBottom: em(6, 36),
-        paddingLeft: em(8, 36),
+        paddingTop: em(6, 32.4),
+        paddingRight: em(8, 32.4),
+        paddingBottom: em(6, 32.4),
+        paddingLeft: em(8, 32.4),
       },
       'h3 code': {
-        paddingTop: em(4, 30),
-        paddingRight: em(6, 30),
-        paddingBottom: em(4, 30),
-        paddingLeft: em(6, 30),
+        paddingTop: em(4, 27),
+        paddingRight: em(6, 27),
+        paddingBottom: em(4, 27),
+        paddingLeft: em(6, 27),
       },
       pre: {
         fontSize: em(18, 20),