diff --git a/src/layout/Shell.css b/src/layout/Shell.css
index 5917e7b..fe92c53 100644
--- a/src/layout/Shell.css
+++ b/src/layout/Shell.css
@@ -187,9 +187,13 @@
   min-width: 0;
   background: var(--zk-white);
   width: 100%;
-  max-width: 1460px;
-  margin: 0 auto;
-  padding: 30px 34px 76px;
+  /* Anchor the content to the nav rather than centring it. Centring a capped
+     block left a wide empty river between the sidebar and the content on a
+     large or zoomed-out monitor; a sidebar layout should hug the rail. The cap
+     is raised so a wide screen is used, and the reading columns cap their own
+     line length internally so text stays comfortable. */
+  max-width: 1320px;
+  padding: 30px 40px 76px;
 }
 
 /* ── Narrow viewports: the rail lies down and scrolls ──────── */
diff --git a/src/screens/screens.css b/src/screens/screens.css
index 300c7cb..61d6f18 100644
--- a/src/screens/screens.css
+++ b/src/screens/screens.css
@@ -593,14 +593,15 @@
 /* ---- lead: the file beside the story ---- */
 .lead {
   display: grid;
-  /* 60 / 40. The story is the point, so it takes the larger share — but a
-     fixed 340px rail left the main column ballooning far wider than the feed
-     text, so a dead gap opened between the narrative and the facts. A
-     proportional split closes it: the AI decision stream gets ~60%, the
-     customer/vehicle/document facts ~40% (capped so it does not sprawl on an
-     ultra-wide monitor). The facts breathe now too — the PDF names stop
-     wrapping. */
-  grid-template-columns: minmax(0, 3fr) minmax(320px, 2fr);
+  /* The story column caps at its comfortable reading width and the facts rail
+     at the width its key/value pairs need; the pair anchors to the nav rather
+     than stretching to fill an ultra-wide monitor (which only opened a void
+     inside each card). Any spare width falls to the right as breathing room,
+     the way a sidebar dashboard should read — never a river between the rail
+     and the content. */
+  grid-template-columns: minmax(0, 760px) minmax(340px, 440px);
+  justify-content: start;
+  max-width: 1240px;
   gap: var(--sp-6);
   align-items: start;
 }