diff --git a/src/uncloseai-modal-builtin.css b/src/uncloseai-modal-builtin.css
index d199063..43ed010 100644
--- a/src/uncloseai-modal-builtin.css
+++ b/src/uncloseai-modal-builtin.css
@@ -816,6 +816,13 @@ dialog#tts-modal {
   z-index: 5;
 }
 
+/* Light theme copy button */
+dialog#uncloseai-embedded-modal[data-theme="light"] .uncloseai-code-copy-btn {
+  background: rgba(255, 255, 255, 0.9);
+  color: #333;
+  border: 1px solid rgba(0, 0, 0, 0.2);
+}
+
 .uncloseai-code-copy-btn:hover {
   opacity: 1;
 }
@@ -857,6 +864,7 @@ dialog#tts-modal {
 .uncloseai-modal-title {
   margin: 0;
   font-weight: 600;
+  color: white;
 }
 
 .uncloseai-modal-title-mobile {
diff --git a/src/uncloseai-modal-pico.css b/src/uncloseai-modal-pico.css
index a7235be..4a3f7cb 100644
--- a/src/uncloseai-modal-pico.css
+++ b/src/uncloseai-modal-pico.css
@@ -872,6 +872,13 @@ dialog#tts-modal::backdrop {
   z-index: 5;
 }
 
+/* Light theme copy button */
+dialog#uncloseai-embedded-modal[data-theme="light"] .uncloseai-code-copy-btn {
+  background: rgba(255, 255, 255, 0.9);
+  color: #333;
+  border: 1px solid rgba(0, 0, 0, 0.2);
+}
+
 .uncloseai-code-copy-btn:hover {
   opacity: 1;
 }
@@ -913,6 +920,7 @@ dialog#tts-modal::backdrop {
 .uncloseai-modal-title {
   margin: 0 !important;
   font-weight: 600 !important;
+  color: white !important;
 }
 
 .uncloseai-modal-title-mobile {