wip: adjustments necessary for 0.5.0

Author: vitorfloriano

docs/book/src/introduction.md

@@ -1,7 +1,8 @@
-**Note:** Impatient readers may head straight to [Quick Start](quick-start.md).
+>[!Tip]
+>Impatient readers may head straight to [Quick Start](quick-start.md).
 
-**Using previous version of Kubebuilder v1 or v2?**
-**Check the legacy documentation for [v1](https://book-v1.book.kubebuilder.io), [v2](https://book-v2.book.kubebuilder.io) or [v3](https://book-v3.book.kubebuilder.io)**
+>[!Important]
+>Using previous version of Kubebuilder? Check the legacy documentation for [v1](https://book-v1.book.kubebuilder.io), [v2](https://book-v2.book.kubebuilder.io) or [v3](https://book-v3.book.kubebuilder.io).
 
 ## Who is this for
 

docs/book/src/logos/favicon.png

@@ -1,5 +1,5 @@
 /* Adds a thin border to the sidebar (aesthetics) */
-#sidebar {
+#mdbook-sidebar {
     border-right: 1px solid var(--theme-popup-border);
 }
 
@@ -36,6 +36,14 @@ html {
     text-decoration: solid underline var(--links);
 }
 
+/* Hides excessive theme options */
+#mdbook-theme-default_theme,
+#mdbook-theme-rust,
+#mdbook-theme-coal,
+#mdbook-theme-ayu {
+    display: none;
+}
+
 /* custom light theme */
 .light {
     --sidebar-bg: #eef5ff;