diff --git a/web/src/components/journal/ArticleLayout.test.tsx b/web/src/components/journal/ArticleLayout.test.tsx
new file mode 100644
index 000000000..dbc581de8
--- /dev/null
+++ b/web/src/components/journal/ArticleLayout.test.tsx
@@ -0,0 +1,54 @@
+import type { AnchorHTMLAttributes, ReactNode } from "react";
+import { describe, expect, it, vi } from "vitest";
+import { render, screen, within } from "@testing-library/react";
+import type { JournalPost } from "@/lib/journal";
+import ArticleLayout from "./ArticleLayout";
+
+// The index page is one <main>. A post was an <article> and a <footer> side by
+// side, with no <main> around either, so a screen reader's jump to the main
+// content found nothing. On 27 October axe flagged all 74 posts at 390 and
+// 1440 for landmark-one-main, with 900 blocks outside any landmark (region).
+
+vi.mock("next/link", () => ({
+  default: ({
+    href,
+    children,
+    ...rest
+  }: AnchorHTMLAttributes<HTMLAnchorElement> & { href: string; children: ReactNode }) => (
+    <a href={href} {...rest}>
+      {children}
+    </a>
+  ),
+}));
+
+function post(slug: string, title: string, date: string): JournalPost {
+  return { slug, title, date, excerpt: `${title} excerpt`, lang: "ko", content: "", readingTime: "3분" };
+}
+
+const older = post("older", "Older post", "2026-05-14T01:30:00+09:00");
+const current = post("current", "Current post", "2026-06-02T20:00:00+09:00");
+
+function renderPost() {
+  return render(
+    <ArticleLayout post={current} lang="ko" previous={older} next={null} allPosts={[current, older]}>
+      <p>Body text</p>
+    </ArticleLayout>,
+  );
+}
+
+describe("ArticleLayout", () => {
+  it("puts the whole post inside one main landmark", () => {
+    const { container } = renderPost();
+    expect(screen.getAllByRole("main")).toHaveLength(1);
+    expect([...container.children].map((el) => el.tagName)).toEqual(["MAIN"]);
+  });
+
+  it("keeps the article and the list of nearby posts in it", () => {
+    renderPost();
+    const main = screen.getByRole("main");
+    expect(within(main).getByRole("article")).toBeTruthy();
+    expect(within(main).getByRole("heading", { level: 1, name: "Current post" })).toBeTruthy();
+    expect(within(main).getByText("Body text")).toBeTruthy();
+    expect(within(main).getByRole("link", { name: /Older post/ }).getAttribute("href")).toBe("/journal/older");
+  });
+});
diff --git a/web/src/components/journal/ArticleLayout.tsx b/web/src/components/journal/ArticleLayout.tsx
index 2979ffc43..500fc7479 100644
--- a/web/src/components/journal/ArticleLayout.tsx
+++ b/web/src/components/journal/ArticleLayout.tsx
@@ -45,7 +45,7 @@ export default function ArticleLayout({
   const windowPosts = allPosts.slice(windowStart, windowStart + 5);
 
   return (
-    <>
+    <main>
       <article className="journal-article">
         <JournalLightbox />
         <LanguageSwitch lang={lang} slug={post.slug} />
@@ -123,7 +123,7 @@ export default function ArticleLayout({
           All writing
         </Link>
       </footer>
-    </>
+    </main>
   );
 }