minor docs styling tweaks

Author: Archmonger

docs/features/hooks.md

@@ -18,7 +18,7 @@ def MyComponent():
     return html.div(my_websocket)
 ```
 
----
+
 
 ## Use Scope
 
@@ -34,7 +34,6 @@ def MyComponent():
     return html.div(my_scope)
 ```
 
----
 
 ## Use Location
 

docs/stylesheets/extra.css

@@ -6,3 +6,7 @@
 .md-header {
 	background-color: var(--md-footer-bg-color--dark);
 }
+
+.md-typeset :is(.admonition, details) {
+	margin: 1em 0;
+}