fix(a11y): resolve color-contrast and link-in-text-block WCAG violations

app/[locale]/blog/[slug]/page.tsx

@@ -24,13 +24,13 @@ const mdxComponents = {
   h2: (props: any) => <Heading level={2} size="3" className="mt-16 mb-6 border-b border-neutral-100 pb-4" {...props} />,
   h3: (props: any) => <Heading level={3} size="4" className="mt-12 mb-4 text-primary" {...props} />,
   h4: (props: any) => <Heading level={4} size="5" className="mt-8 mb-4 uppercase tracking-widest text-neutral-500" {...props} />,
-  p: (props: any) => <p className="text-base md:text-lg text-text-secondary leading-[1.8] mb-6 font-medium max-w-3xl" {...props} />,
-  ul: (props: any) => <ul className="list-none mb-8 space-y-3 text-base md:text-lg text-text-secondary font-medium max-w-3xl" {...props} />,
-  ol: (props: any) => <ol className="list-decimal pl-6 mb-8 space-y-3 text-base md:text-lg text-text-secondary font-medium max-w-3xl" {...props} />,
+  p: (props: any) => <p className="text-base md:text-lg text-text-secondary leading-[1.8] mb-6 font-normal max-w-3xl" {...props} />,
+  ul: (props: any) => <ul className="list-none mb-8 space-y-3 text-base md:text-lg text-text-secondary font-normal max-w-3xl" {...props} />,
+  ol: (props: any) => <ol className="list-decimal pl-6 mb-8 space-y-3 text-base md:text-lg text-text-secondary font-normal max-w-3xl" {...props} />,
   li: (props: any) => (
     <li className="relative pl-6 before:content-[''] before:absolute before:left-0 before:top-[0.6em] before:w-2 before:h-2 before:bg-primary/50 before:rounded-sm" {...props} />
   ),
-  a: (props: any) => <a className="text-primary hover:text-primary-dark underline decoration-primary/30 underline-offset-4 hover:decoration-primary transition-all font-bold" {...props} />,
+  a: (props: any) => <a className="text-text-secondary underline decoration-primary decoration-2 underline-offset-4 hover:text-primary transition-all font-bold" {...props} />,
   strong: (props: any) => <strong className="font-bold text-neutral-900" {...props} />,
   blockquote: (props: any) => (
     <blockquote className="border-l-4 border-primary pl-6 py-3 my-10 italic bg-neutral-50 rounded-r-2xl text-neutral-700 font-medium max-w-3xl shadow-sm" {...props} />
@@ -114,12 +114,12 @@ export default async function BlogPost({ params }: BlogPostProps) {
               }}
             />
           </div>
-          <div className="absolute inset-0 bg-gradient-to-t from-neutral-dark/90 via-neutral-dark/40 to-transparent" />
+          <div className="absolute inset-0 bg-gradient-to-t from-neutral-dark/90 via-neutral-dark/70 to-neutral-dark/30" />
 
           {/* Title overlay on image */}
           <div className="absolute inset-0 flex flex-col justify-end pb-16 md:pb-24">
             <div className="container mx-auto px-4">
-              <div className="max-w-4xl">
+              <div className="max-w-4xl bg-neutral-dark/40 backdrop-blur-md p-6 rounded-2xl border border-white/10">
                 {post.frontmatter.category && (
                   <div className="overflow-hidden mb-6">
                     <span className="inline-block px-4 py-1.5 bg-accent text-neutral-dark text-xs font-bold uppercase tracking-[0.2em] rounded-sm">
@@ -127,10 +127,10 @@ export default async function BlogPost({ params }: BlogPostProps) {
                     </span>
                   </div>
                 )}
-                <Heading level={1} className="text-white mb-8 drop-shadow-2xl">
+                <Heading level={1} className="text-white mb-8 drop-shadow-md">
                   {post.frontmatter.title}
                 </Heading>
-                <div className="flex flex-wrap items-center gap-6 text-white/80 text-sm md:text-base font-medium">
+                <div className="flex flex-wrap items-center gap-6 text-white text-sm md:text-base font-medium drop-shadow-sm">
                   <time dateTime={post.frontmatter.date} suppressHydrationWarning>
                     {new Date(post.frontmatter.date).toLocaleDateString(locale || 'de', {
                       year: 'numeric',
@@ -138,7 +138,7 @@ export default async function BlogPost({ params }: BlogPostProps) {
                       day: 'numeric',
                     })}
                   </time>
-                  <span className="w-1 h-1 bg-white/30 rounded-full" />
+                  <span className="w-1 h-1 bg-white/50 rounded-full" />
                   <span>{readingTime} min read</span>
                   {(new Date(post.frontmatter.date) > new Date() ||
                     post.frontmatter.public === false) && (
@@ -206,7 +206,7 @@ export default async function BlogPost({ params }: BlogPostProps) {
             )}
 
             {/* Main content */}
-            <div className="w-full">
+            <div className="w-full [&_a]:text-primary [&_a:hover]:text-primary-dark [&_a]:underline [&_a]:decoration-primary [&_a]:underline-offset-4 [&_a]:transition-all [&_a]:font-bold [&_a_strong]:text-inherit">
               <MDXRemote source={post.content} components={mdxComponents} />
             </div>