style: reduce gap between main title and subtitle

Author: prabha-git

docs/stylesheets/extra.css

@@ -54,4 +54,13 @@ code {
 /* Hide the logo in the header - Force override */
 .md-header__button.md-logo {
     display: none !important;
+}
+
+/* Tighten spacing between Title and Subtitle */
+.md-typeset h1 {
+    margin-bottom: 0.2rem !important;
+}
+
+.md-typeset h1 + p {
+    margin-top: 0 !important;
 }