tour implementation; style fixes

layouts/AuthorLayout.tsx

@@ -27,7 +27,7 @@ export default function AuthorLayout({ children, frontMatter }: Props) {
   return (
     <>
       <PageSEO title={`Band - ${name}`} description={`Band - ${name}`} />
-      <div className="divide-y">
+      <div className="divide-y divide-gray-200 dark:divide-gray-700">
         <div className="space-y-2 pt-6 pb-8 md:space-y-5">
           <h1 className="text-3xl font-extrabold leading-9 tracking-tight text-gray-900 dark:text-gray-100 sm:text-4xl sm:leading-10 md:text-6xl md:leading-14">
             Band