diff --git a/skins/elastic/styles/colors.less b/skins/elastic/styles/colors.less
index d8f7d992f..7c8bdb736 100644
--- a/skins/elastic/styles/colors.less
+++ b/skins/elastic/styles/colors.less
@@ -1,3 +1,13 @@
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
 
 // Left menu
 @color-taskmenu-background:         #222;
diff --git a/skins/elastic/styles/embed.less b/skins/elastic/styles/embed.less
index 048a91cf4..fba5d28d3 100644
--- a/skins/elastic/styles/embed.less
+++ b/skins/elastic/styles/embed.less
@@ -1,3 +1,14 @@
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
 /* Style for embedded inline warning */
 
 /* TODO: review */
diff --git a/skins/elastic/styles/layout.less b/skins/elastic/styles/layout.less
index 90e975dca..8da60c677 100644
--- a/skins/elastic/styles/layout.less
+++ b/skins/elastic/styles/layout.less
@@ -1,3 +1,14 @@
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
 @screen-width-large:    1200px;
 @screen-width-medium:   1024px;
 @screen-width-small:    768px;
diff --git a/skins/elastic/styles/print.less b/skins/elastic/styles/print.less
index e69de29bb..9d0c1098e 100644
--- a/skins/elastic/styles/print.less
+++ b/skins/elastic/styles/print.less
@@ -0,0 +1,10 @@
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
diff --git a/skins/elastic/styles/styles.less b/skins/elastic/styles/styles.less
index 72e298e3a..6d06afeb4 100644
--- a/skins/elastic/styles/styles.less
+++ b/skins/elastic/styles/styles.less
@@ -1,3 +1,14 @@
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
 @import (reference) "fontawesome.less";
 @import (reference) "colors.less";
 
diff --git a/skins/elastic/styles/widgets/buttons.less b/skins/elastic/styles/widgets/buttons.less
index 040cbd1d1..986c7fb74 100644
--- a/skins/elastic/styles/widgets/buttons.less
+++ b/skins/elastic/styles/widgets/buttons.less
@@ -1,3 +1,14 @@
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
 /*** Buttons ***/
 
 
diff --git a/skins/elastic/styles/widgets/dialogs.less b/skins/elastic/styles/widgets/dialogs.less
index 57a5e6ace..ecafe47b2 100644
--- a/skins/elastic/styles/widgets/dialogs.less
+++ b/skins/elastic/styles/widgets/dialogs.less
@@ -1,4 +1,16 @@
-/*** Style for dialogs ***/
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
+
+/*** Dialogs ***/
 
 /* TODO: To be reviewed with popups implementation */
 
diff --git a/skins/elastic/styles/widgets/forms.less b/skins/elastic/styles/widgets/forms.less
index 502be79c9..3989477e7 100644
--- a/skins/elastic/styles/widgets/forms.less
+++ b/skins/elastic/styles/widgets/forms.less
@@ -1,4 +1,15 @@
-/*** Common form elements style ***/
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
+/*** Common form elements ***/
 
 #uploadform {
     display: none;
diff --git a/skins/elastic/styles/widgets/googiespell.less b/skins/elastic/styles/widgets/googiespell.less
index c1ed00a61..49600e4d7 100644
--- a/skins/elastic/styles/widgets/googiespell.less
+++ b/skins/elastic/styles/widgets/googiespell.less
@@ -1,4 +1,15 @@
-/***** Styles for GoogieSpell *****/
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
+/*** GoogieSpell widget ***/
 
 /* TODO: review and use only what we need */
 
diff --git a/skins/elastic/styles/widgets/lists.less b/skins/elastic/styles/widgets/lists.less
index 8247723de..a797cf6c1 100644
--- a/skins/elastic/styles/widgets/lists.less
+++ b/skins/elastic/styles/widgets/lists.less
@@ -1,3 +1,14 @@
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
 /*** List and treelist widgets ***/
 
 @var-listing-line-height:   2.4em;
diff --git a/skins/elastic/styles/widgets/messagebody.less b/skins/elastic/styles/widgets/messagebody.less
index 78cfc520d..4c2f09c3d 100644
--- a/skins/elastic/styles/widgets/messagebody.less
+++ b/skins/elastic/styles/widgets/messagebody.less
@@ -1,4 +1,15 @@
-/***** Styles for message body elements *****/
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
+/*** Mail message body elements ***/
 
 
 #messagebody {
diff --git a/skins/elastic/styles/widgets/messages.less b/skins/elastic/styles/widgets/messages.less
index b5d4feaa5..9df9306bb 100644
--- a/skins/elastic/styles/widgets/messages.less
+++ b/skins/elastic/styles/widgets/messages.less
@@ -1,3 +1,14 @@
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
 /*** UI Messages ***/
 
 #messagestack {
diff --git a/skins/elastic/styles/widgets/searchbar.less b/skins/elastic/styles/widgets/searchbar.less
index f543ccbb6..845498eef 100644
--- a/skins/elastic/styles/widgets/searchbar.less
+++ b/skins/elastic/styles/widgets/searchbar.less
@@ -1,4 +1,15 @@
-/*** Common UI elements ***/
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
+/*** Searchbar widget ***/
 
 
 .searchbar {
diff --git a/skins/elastic/styles/widgets/taskmenu.less b/skins/elastic/styles/widgets/taskmenu.less
index 24eaa6029..2692a47ac 100644
--- a/skins/elastic/styles/widgets/taskmenu.less
+++ b/skins/elastic/styles/widgets/taskmenu.less
@@ -1,4 +1,15 @@
-/*** Common UI elements ***/
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
+/*** Taskmenu ***/
 
 #taskmenu {
     a {
diff --git a/skins/elastic/styles/widgets/toolbar.less b/skins/elastic/styles/widgets/toolbar.less
index 99b329e26..5df73ba0d 100644
--- a/skins/elastic/styles/widgets/toolbar.less
+++ b/skins/elastic/styles/widgets/toolbar.less
@@ -1,3 +1,14 @@
+/**
+ * Roundcube webmail styles for the Elastic skin
+ *
+ * Copyright (c) 2017, The Roundcube Dev Team
+ *
+ * The contents are subject to the Creative Commons Attribution-ShareAlike
+ * License. It is allowed to copy, distribute, transmit and to adapt the work
+ * by keeping credits to the original autors in the README file.
+ * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
+ */
+
 /*** Toolbar widget ***/
 
 
diff --git a/skins/elastic/ui.js b/skins/elastic/ui.js
index 66358e96e..8c558b556 100644
--- a/skins/elastic/ui.js
+++ b/skins/elastic/ui.js
@@ -1,5 +1,5 @@
 /**
- * Roundcube functions for the elastic skin
+ * Roundcube webmail functions for the Elastic skin
  *
  * Copyright (c) 2017, The Roundcube Dev Team
  *