diff --git a/docs/_sass/custom/custom.scss b/docs/_sass/custom/custom.scss
index 6c66180..6d01cf3 100644
--- a/docs/_sass/custom/custom.scss
+++ b/docs/_sass/custom/custom.scss
@@ -8,6 +8,11 @@ html, body, .side-bar, .main-header, .search-input {
     background-image: linear-gradient(-90deg, #1e0c36 0%, rgba(13,1,30,0.8) 80%, rgba(13,1,30,0) 100%);
 }
 
+// sidebar / header dividers
+.sidebar, .site-header, .main-header {
+    border-color: #44434D8C;
+}
+
 // Anchor links
 a {
     // color: #FB70A9; // for dark mode?