feat(mermaid-viewer): Improve dark mode button hover

Uses BookStack's CSS variables for hover state consistency.

diff --git a/content/mermaid-viewer/head.html b/content/mermaid-viewer/head.html
index e83065898e02f49408159596c67565d54c45815c..3037a8a0897fa6e38e76dc435a1a485e506648ee 100644 (file)
--- a/content/mermaid-viewer/head.html
+++ b/content/mermaid-viewer/head.html
@@ -529,6 +529,10 @@
         background: #f6f8fa;
     }
 
+    .dark-mode .mermaid-viewer-button-base:hover {
+        background: var(--color-bg-alt);
+    }
+
     /* Override for pure white icons in dark mode */
     .dark-mode .mermaid-viewer-button-base {
         color: #fff;