diff --git a/src/styles/gantry.css b/src/styles/gantry.css
index d5a8760..43c18ad 100644
--- a/src/styles/gantry.css
+++ b/src/styles/gantry.css
@@ -255,19 +255,21 @@ html .site-navigation::after {
   transition: transform 320ms cubic-bezier(0.22, 1, 0.36, 1), opacity 320ms ease;
 }
 .gantry-window::before {
-  inset: -7px auto auto -7px;
+  /* The brackets sit on the window's own corners, so they never overhang the
+     beam or clip at the top of the viewport; hover opens them by 2 px. */
+  inset: 0 auto auto 0;
   border-inline-end: 0;
   border-block-end: 0;
 }
 .gantry-window::after {
-  inset: auto -7px -7px auto;
+  inset: auto 0 0 auto;
   border-inline-start: 0;
   border-block-start: 0;
 }
 .gantry-window:hover::before,
-.gantry-window:focus-visible::before { transform: translate(-3px, -3px); opacity: 1; }
+.gantry-window:focus-visible::before { transform: translate(-2px, -2px); opacity: 1; }
 .gantry-window:hover::after,
-.gantry-window:focus-visible::after { transform: translate(3px, 3px); opacity: 1; }
+.gantry-window:focus-visible::after { transform: translate(2px, 2px); opacity: 1; }
 .gantry-window:focus-visible {
   outline: 2px solid var(--focus);
   outline-offset: 6px;
diff --git a/src/styles/route.css b/src/styles/route.css
index c93bb62..3dfb0ed 100644
--- a/src/styles/route.css
+++ b/src/styles/route.css
@@ -482,11 +482,12 @@
       inset 0 1px 0 color-mix(in srgb, var(--chapter-accent, var(--accent)) 38%, transparent),
       0 50px 90px -40px rgb(0 0 0 / 80%);
   }
-  /* Crop marks: the plate is framed like a film slate, not a card. */
+  /* Crop marks: the plate is framed like a film slate, not a card. They are
+     registered on the plate's own corners, like the gantry window's. */
   .reading-stage .chapter-body::after {
     content: '' / '';
     position: absolute;
-    inset: -7px;
+    inset: 0;
     pointer-events: none;
     --mark: color-mix(in srgb, var(--chapter-accent, var(--accent)) 80%, white);
     background: