diff --git a/scripts/aut-1-capture-hover-preview.mjs b/scripts/aut-1-capture-hover-preview.mjs
new file mode 100644
index 00000000..2404b0fb
--- /dev/null
+++ b/scripts/aut-1-capture-hover-preview.mjs
@@ -0,0 +1,142 @@
+#!/usr/bin/env node
+// AUT-1 smoke run — capture the before/after visual diff for the
+// `primary-button hover state` change in `src/assets/main.css`.
+//
+// Renders tests/visual-previews/AUT-1/preview.html in a real Chromium
+// against the project's bundled Bulma stylesheet, then takes two
+// screenshots:
+//
+//   desktop-before.png — Bulma defaults, button idle (no hover effect).
+//   desktop-after.png  — With the AUT-1 CSS rules applied, button
+//                        hovered (lift + brightness shift visible).
+//   mobile-before.png  — Same as desktop-before, captured at the
+//                        Pixel 5 viewport.
+//   mobile-after.png   — Same as desktop-after, captured at the
+//                        Pixel 5 viewport.
+//
+// Output is written to tests/visual-previews/AUT-1/. The script is
+// idempotent: existing files are overwritten, not appended to.
+//
+// Invoke with: `node scripts/aut-1-capture-hover-preview.mjs`
+// (Chromium must already be installed via `npm run test:e2e:install`.)
+
+import { chromium } from "playwright";
+import { promises as fs } from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { dirname } from "node:path";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const REPO_ROOT = path.resolve(__dirname, "..");
+const PREVIEW_HTML = path.join(
+  REPO_ROOT,
+  "tests/visual-previews/AUT-1/preview.html",
+);
+const OUTPUT_DIR = path.join(REPO_ROOT, "tests/visual-previews/AUT-1");
+
+// The AUT-1 hover rules — kept in lockstep with the diff in
+// src/assets/main.css. We inject these via a <style> tag on the
+// "after" pass and leave them off for the "before" pass so the
+// screenshots show the same Bulma theme but with vs without the new
+// hover effect.
+const AUT1_HOVER_CSS = `
+.button.is-primary {
+  transition:
+    filter 0.15s ease,
+    transform 0.15s ease;
+}
+.button.is-primary:hover,
+.button.is-primary.is-hovered {
+  filter: brightness(1.08);
+  transform: translateY(-1px);
+}
+.button.is-primary:active,
+.button.is-primary.is-active {
+  filter: brightness(0.95);
+  transform: translateY(0);
+}
+.button.is-primary:focus-visible {
+  filter: brightness(1.04);
+  transform: translateY(-1px);
+}
+`;
+
+async function captureVariant({ browser, viewport, label, withHoverCss, hover }) {
+  const context = await browser.newContext({
+    viewport,
+    deviceScaleFactor: 2,
+  });
+  const page = await context.newPage();
+  await page.goto(pathToFileUrl(PREVIEW_HTML));
+  if (withHoverCss) {
+    await page.addStyleTag({ content: AUT1_HOVER_CSS });
+  }
+  const target = page.locator(
+    hover
+      ? '[data-testid="primary-button-hover"]'
+      : '[data-testid="primary-button-idle"]',
+  );
+  const stage = page.locator(
+    hover ? "#stage-hover" : "#stage-idle",
+  );
+  if (hover) {
+    await target.hover();
+    // Wait for the 0.15s transition to settle.
+    await page.waitForTimeout(220);
+  }
+  const filename = `${label}-${withHoverCss ? "after" : "before"}.png`;
+  const destination = path.join(OUTPUT_DIR, filename);
+  await stage.screenshot({ path: destination, type: "png" });
+  await context.close();
+  return destination;
+}
+
+function pathToFileUrl(filePath) {
+  // Playwright's `file://` URLs need absolute paths. On POSIX this is
+  // straightforward; on Windows this helper keeps the script cross-platform
+  // should it ever run there.
+  const absolute = path.resolve(filePath);
+  return absolute.startsWith("/") ? `file://${absolute}` : `file:///${absolute}`;
+}
+
+async function main() {
+  await fs.mkdir(OUTPUT_DIR, { recursive: true });
+  const browser = await chromium.launch({ headless: true });
+  try {
+    const viewports = [
+      { label: "desktop", viewport: { width: 1280, height: 720 } },
+      {
+        label: "mobile",
+        viewport: { width: 393, height: 851 },
+      },
+    ];
+    for (const { label, viewport } of viewports) {
+      for (const withHoverCss of [false, true]) {
+        for (const hover of [false, true]) {
+          // We only want idle on the "before" pass and hover on the
+          // "after" pass — skip the two redundant combinations.
+          const isIdleShot = !hover;
+          const isBeforeShot = !withHoverCss;
+          if (isIdleShot !== isBeforeShot) continue;
+          const file = await captureVariant({
+            browser,
+            viewport,
+            label,
+            withHoverCss,
+            hover,
+          });
+          // eslint-disable-next-line no-console
+          console.log("wrote", path.relative(REPO_ROOT, file));
+        }
+      }
+    }
+  } finally {
+    await browser.close();
+  }
+}
+
+main().catch((err) => {
+  // eslint-disable-next-line no-console
+  console.error("aut-1 capture failed:", err);
+  process.exitCode = 1;
+});
diff --git a/src/assets/main.css b/src/assets/main.css
index 106ebd3e..818e44e5 100644
--- a/src/assets/main.css
+++ b/src/assets/main.css
@@ -144,3 +144,30 @@ body:not(.pleno-large-table-headers) .table thead th {
     margin-top: 30px !important;
   }
 }
+
+/* AUT-1: enhanced primary-button hover state.
+   Bulma's default only nudges background lightness; this adds a small
+   lift + brightness shift so the hover is unambiguous. Transitions keep
+   it smooth so it doesn't feel jarring on click-heavy screens. */
+.button.is-primary {
+  transition:
+    filter 0.15s ease,
+    transform 0.15s ease;
+}
+
+.button.is-primary:hover,
+.button.is-primary.is-hovered {
+  filter: brightness(1.08);
+  transform: translateY(-1px);
+}
+
+.button.is-primary:active,
+.button.is-primary.is-active {
+  filter: brightness(0.95);
+  transform: translateY(0);
+}
+
+.button.is-primary:focus-visible {
+  filter: brightness(1.04);
+  transform: translateY(-1px);
+}
diff --git a/tests/visual-previews/AUT-1/desktop-after.png b/tests/visual-previews/AUT-1/desktop-after.png
new file mode 100644
index 00000000..0787f04f
Binary files /dev/null and b/tests/visual-previews/AUT-1/desktop-after.png differ
diff --git a/tests/visual-previews/AUT-1/desktop-before.png b/tests/visual-previews/AUT-1/desktop-before.png
new file mode 100644
index 00000000..0ce3d43b
Binary files /dev/null and b/tests/visual-previews/AUT-1/desktop-before.png differ
diff --git a/tests/visual-previews/AUT-1/mobile-after.png b/tests/visual-previews/AUT-1/mobile-after.png
new file mode 100644
index 00000000..5a8b310e
Binary files /dev/null and b/tests/visual-previews/AUT-1/mobile-after.png differ
diff --git a/tests/visual-previews/AUT-1/mobile-before.png b/tests/visual-previews/AUT-1/mobile-before.png
new file mode 100644
index 00000000..076b2fe4
Binary files /dev/null and b/tests/visual-previews/AUT-1/mobile-before.png differ
diff --git a/tests/visual-previews/AUT-1/preview.html b/tests/visual-previews/AUT-1/preview.html
new file mode 100644
index 00000000..4404a824
--- /dev/null
+++ b/tests/visual-previews/AUT-1/preview.html
@@ -0,0 +1,63 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>AUT-1 primary-button hover preview</title>
+    <!--
+      Bulma 1.x stylesheet from the project's node_modules so the preview
+      matches the real app's default theme. The :root override is the same
+      --bulma-primary-h override that lives in src/assets/main.css so the
+      primary colour renders as the brand teal-blue (#0787BB ≈ HSL 197deg).
+    -->
+    <link rel="stylesheet" href="../../../node_modules/bulma/css/bulma.min.css" />
+    <style>
+      :root {
+        --bulma-primary-h: 197deg;
+        --bulma-primary-s: 92%;
+        --bulma-primary-l: 38%;
+      }
+      body {
+        background: #f5f5f5;
+        margin: 0;
+        padding: 48px 64px;
+        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+      }
+      .stage {
+        display: flex;
+        align-items: center;
+        gap: 48px;
+        background: white;
+        padding: 40px 56px;
+        border-radius: 8px;
+        box-shadow: 0 1px 3px rgba(10, 10, 10, 0.12);
+        width: fit-content;
+      }
+      .label {
+        font-size: 12px;
+        color: #7a7a7a;
+        text-transform: uppercase;
+        letter-spacing: 0.06em;
+        margin-bottom: 12px;
+      }
+      .button.is-primary {
+        min-width: 168px;
+        font-weight: 600;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="stage-idle" class="stage" data-state="idle">
+      <div class="label">Primary button — default</div>
+      <button class="button is-primary" data-testid="primary-button-idle">
+        Confirm booking
+      </button>
+    </div>
+    <div style="height: 32px"></div>
+    <div id="stage-hover" class="stage" data-state="hover">
+      <div class="label">Primary button — hover</div>
+      <button class="button is-primary" data-testid="primary-button-hover">
+        Confirm booking
+      </button>
+    </div>
+  </body>
+</html>