diff --git a/docs/user/src/css/custom.css b/docs/user/src/css/custom.css
index a0234c0..6d901c7 100644
--- a/docs/user/src/css/custom.css
+++ b/docs/user/src/css/custom.css
@@ -290,7 +290,7 @@ h1, h2, h3, h4, h5, h6 {
 /* The white/dark card containing the diagram */
 .mermaid-lightbox-inner {
   position: relative;
-  max-width: min(90vw, 1200px);
+  width: min(90vw, 1200px);
   max-height: 85vh;
   overflow: auto;
   padding: 1.5rem;