diff --git a/src/css/iframe.scss b/src/css/iframe.scss
index 4eb65908..f070b817 100644
--- a/src/css/iframe.scss
+++ b/src/css/iframe.scss
@@ -1,3 +1,20 @@
+/*
+ * This file is part of EvenBetterSEQTA.
+ *
+ * EvenBetterSEQTA is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EvenBetterSEQTA is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EvenBetterSEQTA. If not, see