diff --git a/styles/h5p.css b/styles/h5p.css
index c0a18a54..252a9a44 100644
--- a/styles/h5p.css
+++ b/styles/h5p.css
@@ -76,6 +76,7 @@ html.h5p-iframe .h5p-semi-fullscreen .h5p-content {
   background-color: #000;
 }
 body.h5p-semi-fullscreen {
+  background-color: #fff;
   position: fixed;
   width: 100%;
   height: 100%;
@@ -169,6 +170,8 @@ div.h5p-fullscreen {
   right: 0;
   bottom: 0;
   z-index: 100001;
+  margin: 0;
+  padding: 0;
 }
 .h5p-iframe-wrapper.h5p-semi-fullscreen .buttons {
   position: absolute;