Reduce card component margins.

Author: arielger

lib/cards/index.styl

@@ -39,15 +39,14 @@
     font-size 18px
     color $color-text-black
     margin-top 15px
-    margin-bottom 24px
+    margin-bottom 16px
 
   .card-docs-description
     font-size $font-size-small
     color $color-text-light
     line-height 1.5em
     height 4.5em
     margin 0
-    margin 0 0 6px
 
   .card-docs-links
     text-align left