Improve formatting of code highlighting styles

assets/css/010_colors.css

@@ -146,12 +146,7 @@ hr {
 }
 
 
-.content {
 .codeblock {
-    color: var(--foreground);
-    background-color: var(--background);
-    border: 1px solid var(--gray6);
-
   .err {
     color: var(--red);
   }
@@ -354,38 +349,14 @@ hr {
     color: var(--yellow);
   }
 
-    /* Comment */
-    .c {
-      color: #75715e;
-    }
-
-    /* CommentHashbang */
-    .ch {
-      color: #75715e;
-    }
-
-    /* CommentMultiline */
-    .cm {
-      color: #75715e;
-    }
-
-    /* CommentSingle */
-    .c1 {
-      color: #75715e;
-    }
-
-    /* CommentSpecial */
-    .cs {
-      color: #75715e;
-    }
-
-    /* CommentPreproc */
-    .cp {
-      color: #75715e;
-    }
-
-    /* CommentPreprocFile */
-    .cpf {
+  /* comment */
+  /* comment: hashbang */
+  /* comment: multiline */
+  /* comment: single */
+  /* comment: special */
+  /* comment: preproc */
+  /* comment: preproc file */
+  .c, .ch, .cm, .c1, .cs, .cp, .cpf {
     color: #75715e;
   }
 
@@ -414,4 +385,3 @@ hr {
     color: #75715e;
   }
 }
-}