fix(shadow): apply body style to shadow elements

Author: lowlighter

styles/sectioning/mod.css

@@ -1,5 +1,5 @@
 /* Sections */
-body {
+body, :host {
   max-width: var(--ct-width);
   padding: 0 1.5rem;
   margin: 0 auto;
@@ -10,6 +10,10 @@ body {
   line-height: 1.5;
 }
 
+:host {
+  max-width: auto;
+}
+
 [data-color-scheme] {
   background: var(--bg-default);
   color: var(--default);