diff --git a/assets/main.scss b/assets/main.scss
index 2014516..9f19610 100644
--- a/assets/main.scss
+++ b/assets/main.scss
@@ -36,6 +36,13 @@ pre {
   font-size: 0.8em !important;
 }
 
+// Overrides for light themes
+@media (prefers-color-scheme: light) {
+  *:not(a) {
+    border-color: #000000 !important;
+  }
+}
+
 // Overrides for dark themes
 @media (prefers-color-scheme: dark) {
   *:not(a) {