Reorganize index

docs/_sass/example.sass

@@ -1,7 +1,7 @@
 .bd-example,
 .bd-structure,
 .bd-snippet
-  border: 1px solid $yellow
+  border: 2px solid $background
   position: relative
   &::before
     background: $yellow
@@ -14,6 +14,7 @@
     font-weight: bold
     left: -1px
     letter-spacing: 1px
+    margin-left: -1px
     padding: 3px 5px
     position: absolute
     text-transform: uppercase
@@ -46,14 +47,12 @@
 // Snippet
 .bd-snippet
   +block
-  border: 2px solid $background
   margin-top: 2rem
   position: relative
   &::before
     content: "Snippet"
     align-items: stretch
     display: flex
-    margin-left: -1px
 
 .bd-snippet-preview
   padding: 1.5rem