diff --git a/index.php b/index.php
index 87541f2..eaf81e1 100644
--- a/index.php
+++ b/index.php
@@ -31,7 +31,7 @@ get_header();
 	<?php if ( have_posts() ) : ?>
 		<div class="blog-posts <?php echo esc_attr( $clsEntry ); ?>">
 			<div class="post-list">
-				<div class="post-list__posts grid grid-cols-[repeat(auto-fit,minmax(26rem,1fr))] gap-12">
+				<div class="post-list__posts grid grid-cols-[repeat(auto-fit,minmax(20rem,1fr))] gap-12">
 					<?php
 					while ( have_posts() ) :
 						the_post();
diff --git a/styles/blocks/page-hero.css b/styles/blocks/page-hero.css
index 03a018c..a5b5aa8 100644
--- a/styles/blocks/page-hero.css
+++ b/styles/blocks/page-hero.css
@@ -2,7 +2,7 @@
     @apply text-cwc-blue-01;
 
     line-height: 1;
-    margin: 0 0 1.5rem;
+    margin: 0;
     text-align: left;
 
     em {
diff --git a/tests/blog-mobile-fixes.spec.js b/tests/blog-mobile-fixes.spec.js
new file mode 100644
index 0000000..eb42709
--- /dev/null
+++ b/tests/blog-mobile-fixes.spec.js
@@ -0,0 +1,189 @@
+import { expect, test } from "@playwright/test";
+
+/**
+ * Regression coverage for the four mobile-blog layout bugs:
+ *
+ * 1. Hero text too close to the header.
+ * 2. Gap between title and intro too big (80px instead of ~24px).
+ * 3. Intro runs to the viewport edge on the left.
+ * 4. Post card runs to the viewport edge on the right.
+ *
+ * Tests run against the local Herd site where the rebuilt theme.css is
+ * served. The live deployment (solowebdesigns.net) will pick up the
+ * rebuilt CSS when the user deploys.
+ */
+
+const blogUrl = "http://community-works-collaborative.test/blog/";
+
+test.describe("blog page mobile layout", () => {
+    test.use({ viewport: { width: 402, height: 874 } });
+
+    test("hero has top padding so it isn't glued to the header", async ({
+        page,
+    }) => {
+        await page.goto(blogUrl, { waitUntil: "networkidle" });
+
+        const data = await page.evaluate(() => {
+            const header = document.querySelector(".site-header");
+            const hero = document.querySelector(".page-hero");
+            const heading = document.querySelector(".page-hero__heading");
+            const cs = hero ? getComputedStyle(hero) : null;
+            return {
+                headerBottom: header ? Math.round(header.getBoundingClientRect().bottom) : null,
+                heroTop: hero ? Math.round(hero.getBoundingClientRect().top) : null,
+                heroPaddingTop: cs ? cs.paddingTop : null,
+                headingTop: heading ? Math.round(heading.getBoundingClientRect().top) : null,
+            };
+        });
+
+        // The hero must have some top padding (>= 8px) on mobile.
+        const pt = parseFloat(data.heroPaddingTop) || 0;
+        expect(
+            pt,
+            `hero paddingTop should be >= 8px on mobile, got ${pt}`,
+        ).toBeGreaterThanOrEqual(8);
+
+        // The heading shouldn't be touching the bottom of the header.
+        const gap = data.headingTop - data.headerBottom;
+        expect(
+            gap,
+            `heading should sit at least 8px below the header, got ${gap}px`,
+        ).toBeGreaterThanOrEqual(8);
+    });
+
+    test("title-to-intro gap is ~24px (not 80px) on mobile", async ({
+        page,
+    }) => {
+        await page.goto(blogUrl, { waitUntil: "networkidle" });
+
+        const gap = await page.evaluate(() => {
+            const heading = document.querySelector(".page-hero__heading");
+            const intro = document.querySelector(".page-hero__intro");
+            if (!heading || !intro) return null;
+            const hRect = heading.getBoundingClientRect();
+            const iRect = intro.getBoundingClientRect();
+            return Math.round(iRect.top - hRect.bottom);
+        });
+
+        expect(gap, `title-to-intro gap should be ~24px, got ${gap}px`).toBeLessThanOrEqual(40);
+    });
+
+    test("hero intro is padded from the left edge", async ({ page }) => {
+        await page.goto(blogUrl, { waitUntil: "networkidle" });
+
+        const data = await page.evaluate(() => {
+            const intro = document.querySelector(".page-hero__intro");
+            const heading = document.querySelector(".page-hero__heading");
+            if (!intro || !heading) return null;
+            return {
+                introX: Math.round(intro.getBoundingClientRect().x),
+                headingX: Math.round(heading.getBoundingClientRect().x),
+                winW: window.innerWidth,
+            };
+        });
+
+        // The intro should have at least 16px of left padding from the viewport edge.
+        expect(
+            data.introX,
+            `intro x=${data.introX} should be >= 16`,
+        ).toBeGreaterThanOrEqual(16);
+        expect(
+            data.headingX,
+            `heading x=${data.headingX} should be >= 16`,
+        ).toBeGreaterThanOrEqual(16);
+    });
+
+    test("intro has bottom margin so it doesn't sit on the first card", async ({
+        page,
+    }) => {
+        await page.goto(blogUrl, { waitUntil: "networkidle" });
+
+        const data = await page.evaluate(() => {
+            const intro = document.querySelector(".page-hero__intro");
+            const firstCard = document.querySelector(".post-list__post");
+            if (!intro || !firstCard) return null;
+            const cs = intro ? getComputedStyle(intro) : null;
+            const iRect = intro.getBoundingClientRect();
+            const cRect = firstCard.getBoundingClientRect();
+            return {
+                introMarginBottom: cs ? cs.marginBottom : null,
+                introBottom: Math.round(iRect.bottom),
+                cardTop: Math.round(cRect.top),
+                gap: Math.round(cRect.top - iRect.bottom),
+            };
+        });
+
+        // The intro must have a non-zero bottom margin.
+        const mb = parseFloat(data.introMarginBottom) || 0;
+        expect(
+            mb,
+            `intro marginBottom should be >= 16px, got ${mb}`,
+        ).toBeGreaterThanOrEqual(16);
+
+        // The intro should sit at least 16px above the first card.
+        expect(
+            data.gap,
+            `intro-to-card gap should be >= 16px, got ${data.gap}px`,
+        ).toBeGreaterThanOrEqual(16);
+    });
+
+    test("post card fits within the viewport on mobile", async ({ page }) => {
+        await page.goto(blogUrl, { waitUntil: "networkidle" });
+
+        const data = await page.evaluate(() => {
+            const card = document.querySelector(".post-list__post");
+            if (!card) return null;
+            const r = card.getBoundingClientRect();
+            return {
+                x: Math.round(r.x),
+                w: Math.round(r.width),
+                right: Math.round(r.right),
+                winW: window.innerWidth,
+            };
+        });
+
+        // The card must not overflow the viewport on either side.
+        expect(
+            data.x,
+            `card x=${data.x} should be >= 0`,
+        ).toBeGreaterThanOrEqual(0);
+        expect(
+            data.right,
+            `card right=${data.right} should be <= ${data.winW}`,
+        ).toBeLessThanOrEqual(data.winW);
+    });
+
+    test("no horizontal overflow on the blog page at 402", async ({
+        page,
+    }) => {
+        await page.goto(blogUrl, { waitUntil: "networkidle" });
+
+        const data = await page.evaluate(() => ({
+            docW: document.documentElement.scrollWidth,
+            winW: window.innerWidth,
+        }));
+
+        expect(
+            data.docW,
+            `docW=${data.docW} exceeds winW=${data.winW}`,
+        ).toBeLessThanOrEqual(data.winW + 1);
+    });
+});
+
+test.describe("blog page mobile layout (xs 360)", () => {
+    test.use({ viewport: { width: 360, height: 800 } });
+
+    test("post card fits within 360px viewport", async ({ page }) => {
+        await page.goto(blogUrl, { waitUntil: "networkidle" });
+
+        const data = await page.evaluate(() => {
+            const card = document.querySelector(".post-list__post");
+            if (!card) return null;
+            const r = card.getBoundingClientRect();
+            return { x: Math.round(r.x), w: Math.round(r.width), right: Math.round(r.right), winW: window.innerWidth };
+        });
+
+        expect(data.x).toBeGreaterThanOrEqual(0);
+        expect(data.right).toBeLessThanOrEqual(data.winW);
+    });
+});
diff --git a/views/partials/page-hero.php b/views/partials/page-hero.php
index 8271494..ceffa4b 100644
--- a/views/partials/page-hero.php
+++ b/views/partials/page-hero.php
@@ -25,8 +25,8 @@ if ( ! $heading ) {
 $wrapperStyle = $bgColor ? 'background-color: ' . esc_attr( $bgColor ) . ';' : '';
 ?>
 
-<div class="page-hero <?php echo $isDark ? 'dark' : ''; ?> lg:px-0 lg:mt-30 lg:mb-4" style="<?php echo esc_attr( $wrapperStyle ); ?>">
-    <div class="page-hero__content container flex flex-col lg:flex-row justify-between gap-20 mx-auto px-0!">
+<div class="page-hero <?php echo $isDark ? 'dark' : ''; ?> pt-4 lg:px-0 lg:pt-30 lg:mb-4" style="<?php echo esc_attr( $wrapperStyle ); ?>">
+    <div class="page-hero__content container flex flex-col lg:flex-row justify-between gap-6 lg:gap-20 mx-auto lg:px-0!">
         <!-- <div id="breadcrumbs">
             <?php Breadcrumbs::render(); ?>
         </div> -->
@@ -41,7 +41,7 @@ $wrapperStyle = $bgColor ? 'background-color: ' . esc_attr( $bgColor ) . ';' : '
             <?php endif; ?>
 
             <?php if ( $intro ) : ?>
-                <div class="page-hero__intro grow text-18px pt-3">
+                <div class="page-hero__intro grow text-18px mb-6">
                     <?php echo wp_kses_post( $intro ); ?>
                 </div>
                 <?php