diff --git a/src/css/feedback.css b/src/css/feedback.css
index 52870e4..766997f 100644
--- a/src/css/feedback.css
+++ b/src/css/feedback.css
@@ -10,7 +10,7 @@
   top: calc(var(--toc-top) + var(--toc-height));
   margin-left: 5em;
   margin-right: var(--toc-margin-right);
-  z-index: 999;
+  z-index: 199;
 }
 
 @media screen and (max-height: 670px) {
diff --git a/src/css/kapa.css b/src/css/kapa.css
new file mode 100644
index 0000000..510391a
--- /dev/null
+++ b/src/css/kapa.css
@@ -0,0 +1,7 @@
+.mantine-Modal-close {
+  color: #f8f9fa;
+}
+
+.mantine-Modal-close:hover {
+  color: #868e96;
+}
diff --git a/src/css/site.css b/src/css/site.css
index abe67ea..7434565 100644
--- a/src/css/site.css
+++ b/src/css/site.css
@@ -28,3 +28,4 @@
 @import "footer.css";
 @import "highlight.css";
 @import "print.css";
+@import "kapa.css";