exp: css variables (#115)

* update: package.json and schema.ts

* fix: fern schema

* exp: css variables

* Add styling for custom header and footer components

* Update footer styling in CSS file

---------

Co-authored-by: Nikhil Tidke <[email protected]>

Author: nikhiltidke101

custom-implementation/src/components/footer.css

@@ -4,37 +4,17 @@
 	cursor: pointer;
 }
 
-.custom-footer html, body, div, applet, object, iframe,
-h1, h2, h3, h4, h5, h6, p, blockquote, pre,
-a, abbr, acronym, address, big, cite, code,
-del, dfn, em, img, ins, kbd, q, s, samp,
-small, strike, strong, sub, sup, tt, var,
-b, u, i, center,
-dl, dt, dd, ol, ul, li,
-fieldset, form, label, legend,
-table, caption, tbody, tfoot, thead, tr, th, td,
-article, aside, canvas, details, embed, 
-figure, figcaption, footer, header, hgroup, 
-menu, nav, output, ruby, section, summary,
-time, mark, audio, video, button {
-	margin: 0;
-	padding: 0;
-	border: 0;
-	vertical-align: baseline;
-}
-
-
-/* HTML5 display-role reset for older browsers */
-.custom-footer article, aside, details, figcaption, figure, 
-footer, header, hgroup, menu, nav, section {
-	display: block;
+.custom-footer * {
+    margin: 0;
+    padding: 0;
+    border: 0;
 }
 
 .custom-footer ol, ul {
 	list-style: none;
 }
 
-.custom-footer blockquote, q {
+.custom-footer blockquote {
 	quotes: none;
 }
 
@@ -46,4 +26,8 @@ footer, header, hgroup, menu, nav, section {
 .custom-footer table {
 	border-collapse: collapse;
 	border-spacing: 0;
+}
+
+.custom-footer {
+	border-top-width: 0;
 }