diff --git a/apps/web/src/styles/base.css b/apps/web/src/styles/base.css
index 78d6d38..33c1939 100644
--- a/apps/web/src/styles/base.css
+++ b/apps/web/src/styles/base.css
@@ -60,6 +60,9 @@ button {
 .app-body {
   display: flex;
   min-height: 0;
+  /* Grid items default to a min-content minimum; without this the row can
+     force the whole app wider than the viewport (issue #100). */
+  min-width: 0;
 }
 
 .topbar {
@@ -600,14 +603,15 @@ button {
   gap: var(--space-4);
 }
 
-/* Page editor (issue #25) */
+/* Page editor (issue #25). Fills the content area — no width cap (issue
+   #100); the public read view keeps its own narrow reading layout. */
 .editor-page {
-  max-width: 48rem;
-  margin: 0 auto;
+  min-width: 0;
 }
 
 .editor-page__header {
   display: flex;
+  flex-wrap: wrap;
   align-items: center;
   gap: var(--space-4);
   margin-bottom: var(--space-4);