diff --git a/public/css/garden.css b/public/css/garden.css
index 81e20c1..f850667 100644
--- a/public/css/garden.css
+++ b/public/css/garden.css
@@ -58,7 +58,12 @@ body {
   font-family: var(--garden-font);
 }
 
-/* ── Layout — let ASW handle width ─────────────────────────── */
+/* ── Layout — contained, not a billboard ───────────────────── */
+main {
+  max-width: 800px;
+  margin-inline: auto;
+  padding-inline: var(--size-3);
+}
 
 /* ── Links — violet accent, indigo hover ──────────────────── */
 a {
diff --git a/static/css/garden.css b/static/css/garden.css
index 81e20c1..f850667 100644
--- a/static/css/garden.css
+++ b/static/css/garden.css
@@ -58,7 +58,12 @@ body {
   font-family: var(--garden-font);
 }
 
-/* ── Layout — let ASW handle width ─────────────────────────── */
+/* ── Layout — contained, not a billboard ───────────────────── */
+main {
+  max-width: 800px;
+  margin-inline: auto;
+  padding-inline: var(--size-3);
+}
 
 /* ── Links — violet accent, indigo hover ──────────────────── */
 a {