diff --git a/core/modules/book/css/book.admin.css b/core/modules/book/css/book.admin.css
new file mode 100644
index 0000000..1059aad
--- /dev/null
+++ b/core/modules/book/css/book.admin.css
@@ -0,0 +1,11 @@
+/**
+ * @file
+ * Administration styles for the Book module.
+ */
+
+/**
+ * Book outline on book edit form.
+ */
+.js .book-outline-form .form-submit {
+  display: none;
+}
diff --git a/core/modules/book/css/book.theme-rtl.css b/core/modules/book/css/book.theme-rtl.css
new file mode 100644
index 0000000..381a4cc
--- /dev/null
+++ b/core/modules/book/css/book.theme-rtl.css
@@ -0,0 +1,16 @@
+/**
+ * @file
+ * Right-to-Left styling for the Book module.
+ */
+
+/**
+ * Book navigation.
+ */
+.book-pager .previous {
+  float: right;
+  text-align: right;
+}
+.book-pager .next {
+  float: left;
+  text-align: left;
+}
diff --git a/core/modules/book/css/book.theme.css b/core/modules/book/css/book.theme.css
new file mode 100644
index 0000000..f1da027
--- /dev/null
+++ b/core/modules/book/css/book.theme.css
@@ -0,0 +1,35 @@
+/**
+ * @file
+ * Styling for the Book module.
+ */
+
+/**
+ * Book navigation.
+ */
+.book-navigation .menu {
+  padding-bottom: 0;
+  padding-top: 1em;
+}
+.book-navigation .book-pager {
+  margin: 0;
+  overflow: auto;
+  padding: 0.5em 0;
+}
+.book-pager li {
+  display: inline-block;
+  list-style-type: none;
+  vertical-align: top;
+}
+.book-pager .previous {
+  text-align: left; /* LTR */
+  width: 45%;
+}
+.book-pager .up {
+  text-align: center;
+  width: 8%;
+}
+.book-pager .next {
+  float: right; /* LTR */
+  text-align: right; /* LTR */
+  width: 45%;
+}
diff --git a/core/modules/edit/css/edit.css b/core/modules/edit/css/edit.module.css
similarity index 100%
rename from core/modules/edit/css/edit.css
rename to core/modules/edit/css/edit.module.css
diff --git a/core/modules/edit/edit.module b/core/modules/edit/edit.module
index 0c8eb0f..9d98ef5 100644
--- a/core/modules/edit/edit.module
+++ b/core/modules/edit/edit.module
@@ -100,7 +100,7 @@ function edit_library_info() {
       ),
     ),
     'css' => array(
-      $path . '/css/edit.css' => array(),
+      $path . '/css/edit.module.css' => array(),
     ),
     'dependencies' => array(
       array('system', 'jquery'),
diff --git a/core/modules/field/css/field.module-rtl.css b/core/modules/field/css/field.module-rtl.css
new file mode 100644
index 0000000..4c2dec9
--- /dev/null
+++ b/core/modules/field/css/field.module-rtl.css
@@ -0,0 +1,10 @@
+form .field-multiple-table .field-multiple-drag {
+  padding-left: 0;
+}
+form .field-multiple-table .field-multiple-drag .tabledrag-handle{
+  padding-left: .5em;
+}
+.field-label-inline .field-label,
+.field-label-inline .field-items {
+  float: right;
+}
diff --git a/core/modules/field/css/field.module.css b/core/modules/field/css/field.module.css
new file mode 100644
index 0000000..2ec03af
--- /dev/null
+++ b/core/modules/field/css/field.module.css
@@ -0,0 +1,28 @@
+
+/* Field display */
+.field .field-label {
+  font-weight: bold;
+}
+.field-label-inline .field-label,
+.field-label-inline .field-items {
+  float:left; /*LTR*/
+}
+
+/* Form display */
+form .field-edit-link {
+  margin: 0 0.3em;
+}
+form .field-multiple-table {
+  margin: 0;
+}
+form .field-multiple-table .field-multiple-drag {
+  width: 30px;
+  padding-right: 0; /*LTR*/
+}
+form .field-multiple-table .field-multiple-drag .tabledrag-handle {
+  padding-right: .5em; /*LTR*/
+}
+
+form .field-add-more-submit {
+  margin: .5em 0 0;
+}
diff --git a/core/modules/forum/css/forum.module-rtl.css b/core/modules/forum/css/forum.module-rtl.css
new file mode 100644
index 0000000..0e5d3ed
--- /dev/null
+++ b/core/modules/forum/css/forum.module-rtl.css
@@ -0,0 +1,24 @@
+/**
+ * @file
+ * Right-to-left styling for the Forum module.
+ */
+
+#forum .icon {
+  float: right;
+  margin: 0 0 0 9px;
+}
+#forum div.indent {
+  margin-left: 0;
+  margin-right: 20px;
+}
+.forum-topic-navigation {
+  padding: 1em 3em 0 0;
+}
+.forum-topic-navigation .topic-previous {
+  text-align: left;
+  float: right;
+}
+.forum-topic-navigation .topic-next {
+  text-align: right;
+  float: left;
+}
diff --git a/core/modules/forum/css/forum.module.css b/core/modules/forum/css/forum.module.css
new file mode 100644
index 0000000..0c4f8fc
--- /dev/null
+++ b/core/modules/forum/css/forum.module.css
@@ -0,0 +1,47 @@
+/**
+ * @file
+ * Styling for the Forum module.
+ */
+
+#forum .description {
+  font-size: 0.9em;
+  margin: 0.5em;
+}
+#forum td.created,
+#forum td.posts,
+#forum td.topics,
+#forum td.last-reply,
+#forum td.replies,
+#forum td.pager {
+  white-space: nowrap;
+}
+#forum .icon{
+  background-image: url(../../../misc/forum-icons.png);
+  background-repeat: no-repeat;
+  float: left; /* LTR */
+  height: 24px;
+  margin: 0 9px 0 0; /* LTR */
+  width: 24px;
+}
+#forum .title {
+  overflow: hidden;
+}
+#forum div.indent {
+  margin-left: 20px; /* LTR */
+}
+
+#forum .topic-status-new {
+  background-position: -24px 0;
+}
+#forum .topic-status-hot {
+  background-position: -48px 0;
+}
+#forum .topic-status-hot-new {
+  background-position: -72px 0;
+}
+#forum .topic-status-sticky {
+  background-position: -96px 0;
+}
+#forum .topic-status-closed {
+  background-position: -120px 0;
+}
diff --git a/core/modules/image/css/image.admin.css b/core/modules/image/css/image.admin.css
new file mode 100644
index 0000000..8b37456
--- /dev/null
+++ b/core/modules/image/css/image.admin.css
@@ -0,0 +1,79 @@
+
+/**
+ * Image style configuration pages.
+ */
+.image-style-new,
+.image-style-new div {
+  display: inline;
+}
+.image-style-preview .preview-image-wrapper {
+  float: left;
+  padding-bottom: 2em;
+  text-align: center;
+  top: 50%;
+  width: 48%;
+}
+.image-style-preview .preview-image {
+  margin: auto;
+  position: relative;
+}
+.image-style-preview .preview-image .width {
+  border: 1px solid #666;
+  border-top: none;
+  bottom: -6px;
+  height: 2px;
+  left: -1px;
+  position: absolute;
+  -webkit-box-sizing: content-box;
+  -moz-box-sizing: content-box;
+  box-sizing: content-box;
+}
+.image-style-preview .preview-image .width span {
+  position: relative;
+  top: 4px;
+}
+.image-style-preview .preview-image .height {
+  border: 1px solid #666;
+  border-left: none;
+  position: absolute;
+  right: -6px;
+  top: -1px;
+  width: 2px;
+  -webkit-box-sizing: content-box;
+  -moz-box-sizing: content-box;
+  box-sizing: content-box;
+}
+.image-style-preview .preview-image .height span {
+  height: 2em;
+  left: 10px;
+  margin-top: -1em;
+  position: absolute;
+  top: 50%;
+}
+
+/**
+ * Improve image style preview on narrow viewports.
+ */
+@media screen and (max-width: 470px) {
+  .image-style-preview .preview-image-wrapper {
+    float: none;
+    margin-bottom: 1em;
+  }
+  .image-style-preview .preview-image-wrapper:last-child {
+    margin-bottom: 0;
+  }
+}
+
+/**
+ * Image anchor element.
+ */
+.image-anchor {
+  width: auto;
+}
+.image-anchor .even,
+.image-anchor .odd {
+  background: none;
+}
+.image-anchor td {
+  border: 1px solid #ccc;
+}
diff --git a/core/modules/image/css/image.skin-rtl.css b/core/modules/image/css/image.skin-rtl.css
new file mode 100644
index 0000000..facb97b
--- /dev/null
+++ b/core/modules/image/css/image.skin-rtl.css
@@ -0,0 +1,11 @@
+
+/**
+ * Image upload widget.
+ */
+.image-preview {
+  float: right;
+  padding: 0 0 10px 10px;
+}
+.image-widget-data {
+  float: right;
+}
diff --git a/core/modules/image/css/image.skin.css b/core/modules/image/css/image.skin.css
new file mode 100644
index 0000000..9f7d534
--- /dev/null
+++ b/core/modules/image/css/image.skin.css
@@ -0,0 +1,14 @@
+
+/**
+ * Image upload widget.
+ */
+.image-preview {
+  float: left; /* LTR */
+  padding: 0 10px 10px 0; /* LTR */
+}
+.image-widget-data {
+  float: left; /* LTR */
+}
+.image-widget-data .text-field {
+  width: auto;
+}
diff --git a/core/modules/node/css/node.admin.css b/core/modules/node/css/node.admin.css
new file mode 100644
index 0000000..101a38d
--- /dev/null
+++ b/core/modules/node/css/node.admin.css
@@ -0,0 +1,11 @@
+/**
+ * @file
+ * Styles for administration pages.
+ */
+
+/**
+ * Revisions overview screen.
+ */
+.revision-current {
+  background: #ffc;
+}
diff --git a/core/modules/node/css/node.module.css b/core/modules/node/css/node.module.css
new file mode 100644
index 0000000..1f92354
--- /dev/null
+++ b/core/modules/node/css/node.module.css
@@ -0,0 +1,69 @@
+/**
+ * @file
+ * Styles for administration pages.
+ */
+
+/**
+ * Node add/edit form layout
+ */
+
+/* Narrow screens */
+.layout-region {
+  -webkit-box-sizing: border-box;
+  -moz-box-sizing:    border-box;
+  box-sizing:         border-box;
+}
+
+/* Wide screens */
+@media
+  screen and (min-width: 780px),
+  (orientation: landscape) and (min-device-height: 780px) {
+
+  .layout-region-node-main,
+  .layout-region-node-footer {
+    float: left; /* LTR */
+    width: 65%;
+    padding-right: 2em;
+  }
+
+  .layout-region-node-secondary {
+    float: right; /* LTR */
+    width: 35%;
+  }
+
+  /* @todo File an issue to add a standard class to all text-like inputs */
+  .layout-region-node-secondary .form-autocomplete,
+  .layout-region-node-secondary .form-text,
+  .layout-region-node-secondary .form-tel,
+  .layout-region-node-secondary .form-email,
+  .layout-region-node-secondary .form-url,
+  .layout-region-node-secondary .form-search,
+  .layout-region-node-secondary .form-number,
+  .layout-region-node-secondary .form-color,
+  .layout-region-node-secondary textarea {
+    -webkit-box-sizing: border-box;
+    -moz-box-sizing:    border-box;
+    box-sizing:         border-box;
+    width: 100%;
+    max-width: 100%;
+  }
+}
+
+/**
+ * The vertical toolbar mode gets triggered for narrow screens, which throws off
+ * the intent of media queries written for the viewport width. When the vertical
+ * toolbar is on, we need to suppress layout for the original media width + the
+ * toolbar width (240px). In this case, 240px + 780px.
+ */
+@media
+  screen and (max-width: 1020px),
+  (orientation: landscape) and (max-device-height: 1020px) {
+
+  .toolbar-vertical .layout-region-node-main,
+  .toolbar-vertical .layout-region-node-footer,
+  .toolbar-vertical .layout-region-node-secondary {
+    float: none;
+    width: auto;
+    padding-right: 0;
+  }
+}
diff --git a/core/modules/openid/css/openid-rtl.module.css b/core/modules/openid/css/openid-rtl.module.css
new file mode 100644
index 0000000..36acd61
--- /dev/null
+++ b/core/modules/openid/css/openid-rtl.module.css
@@ -0,0 +1,10 @@
+#edit-openid-identifier {
+  background-position: right 50%;
+  padding-left: 0;
+  padding-right: 20px;
+}
+
+#block-user-login .openid-link {
+    background-position: right top;
+    padding: 0 1.5em 0 0;
+}
diff --git a/core/modules/openid/css/openid.module.css b/core/modules/openid/css/openid.module.css
new file mode 100644
index 0000000..f96058e
--- /dev/null
+++ b/core/modules/openid/css/openid.module.css
@@ -0,0 +1,17 @@
+#edit-openid-identifier {
+  background-image: url("login-bg.png");
+  background-position: left 50%; /* LTR */
+  background-repeat: no-repeat;
+  padding-left: 20px; /* LTR */
+}
+
+#block-user-login #openid-login-form {
+  display: none;
+}
+
+#block-user-login .openid-link {
+  background-image: url("login-bg.png");
+  background-position: left top; /* LTR */
+  background-repeat: no-repeat;
+  padding: 0 0 0 1.5em; /* LTR */
+}
diff --git a/core/modules/shortcut/css/shortcut.module-rtl.css b/core/modules/shortcut/css/shortcut.module-rtl.css
new file mode 100644
index 0000000..ed903a7
--- /dev/null
+++ b/core/modules/shortcut/css/shortcut.module-rtl.css
@@ -0,0 +1,13 @@
+
+/**
+ * @file
+ * Generic RTL base styles for shortcut module.
+ */
+
+/**
+ * Add/remove links.
+ */
+.add-or-remove-shortcuts .icon,
+.add-or-remove-shortcuts .text {
+  float: right;
+}
diff --git a/core/modules/shortcut/css/shortcut.module.css b/core/modules/shortcut/css/shortcut.module.css
new file mode 100644
index 0000000..8575904
--- /dev/null
+++ b/core/modules/shortcut/css/shortcut.module.css
@@ -0,0 +1,22 @@
+/**
+ * @file
+ * Generic base styles for shortcut module.
+ */
+
+/**
+ * Add/remove links.
+ */
+.add-or-remove-shortcuts .icon {
+  display: block;
+  float: left; /* LTR */
+  margin-top: 5px;
+}
+.add-or-remove-shortcuts .text {
+  display: none;
+  float: left; /* LTR */
+  padding-top: 2px;
+}
+.add-or-remove-shortcuts a:focus .text,
+.add-or-remove-shortcuts a:hover .text {
+  display: block;
+}
diff --git a/core/modules/shortcut/css/shortcut.theme-rtl.css b/core/modules/shortcut/css/shortcut.theme-rtl.css
new file mode 100644
index 0000000..8a687d9
--- /dev/null
+++ b/core/modules/shortcut/css/shortcut.theme-rtl.css
@@ -0,0 +1,41 @@
+
+/**
+ * @file
+ * RTL styling for the shortcut module.
+ */
+
+/**
+ * Add/remove links.
+ */
+.add-or-remove-shortcuts .icon {
+  margin-left: 0;
+  margin-right: 8px;
+}
+.add-shortcut a:focus .icon,
+.add-shortcut a:hover .icon {
+  background-position: 0 -24px;
+}
+.remove-shortcut a:focus .icon,
+.remove-shortcut a:hover .icon {
+  background-position: -12px -24px;
+}
+.add-or-remove-shortcuts .text {
+  padding: 0 10px 0 6px;
+}
+.add-or-remove-shortcuts a:focus .text,
+.add-or-remove-shortcuts a:hover .text {
+  border-radius: 5px 0 0 5px;
+}
+
+/**
+ * Toolbar.
+ */
+.toolbar-js .horizontal #edit-shortcuts {
+  border-left: 0 none;
+  border-right: 1px solid #d9d9d9;
+  float: right;
+  margin-left: 0;
+  margin-right: 0.3333em;
+  padding-left: 0.3333em;
+  padding-right: 0.6667em;
+}
diff --git a/core/modules/shortcut/css/shortcut.theme.css b/core/modules/shortcut/css/shortcut.theme.css
new file mode 100644
index 0000000..2a1a6ab
--- /dev/null
+++ b/core/modules/shortcut/css/shortcut.theme.css
@@ -0,0 +1,52 @@
+/**
+ * @file
+ * Styling for the shortcut module.
+ */
+
+/**
+ * Toolbar.
+ */
+.icon-shortcut:before {
+  background-image: url("../images/shortcut.png");
+}
+.icon-shortcut:active:before,
+.icon-shortcut.active:before {
+  background-image: url("../images/shortcut-active.png");
+}
+.toolbar .tray.horizontal.shortcuts .menu {
+  float: left;
+}
+.edit-shortcuts {
+  display: block;
+}
+.toolbar .vertical .edit-shortcuts {
+  text-align: right;
+  padding: 1em;
+}
+.toolbar .horizontal .edit-shortcuts {
+  float: left; /* LTR */
+}
+
+/**
+ * Add/remove links.
+ */
+.add-or-remove-shortcuts .icon {
+  background: transparent url(../shortcut.png) no-repeat;
+  height: 12px;
+  margin-left: 8px; /* LTR */
+  overflow: hidden;
+  text-indent: 12px;
+  width: 12px;
+}
+.add-shortcut a:focus .icon,
+.add-shortcut a:hover .icon {
+  background-position: 0 -12px; /* LTR */
+}
+.remove-shortcut .icon {
+  margin-top: 4px;
+  background-position: -12px 0;
+}
+.remove-shortcut a:focus .icon,
+.remove-shortcut a:hover .icon {
+  background-position: -12px -12px; /* LTR */
+}
diff --git a/core/modules/simpletest/css/simpletest.module.css b/core/modules/simpletest/css/simpletest.module.css
new file mode 100644
index 0000000..86bd04b
--- /dev/null
+++ b/core/modules/simpletest/css/simpletest.module.css
@@ -0,0 +1,89 @@
+
+/* Test Table */
+#simpletest-form-table th.select-all {
+  width: 1em;
+}
+th.simpletest_test {
+  width: 16em;
+}
+
+.simpletest-image {
+  display: inline-block;
+  cursor: pointer;
+  width: 1em;
+}
+.simpletest-group-label label {
+  display: inline;
+  font-weight: bold;
+}
+.simpletest-test-label label {
+  margin-left: 1em; /* LTR */
+}
+.simpletest-test-description .description {
+  margin: 0;
+}
+#simpletest-form-table tr td {
+  background-color: white;
+  color: #494949;
+}
+#simpletest-form-table tr.simpletest-group td {
+  background-color: #edf5fa;
+  color: #494949;
+}
+
+table#simpletest-form-table tr.simpletest-group label {
+  display: inline;
+}
+
+div.message > div.item-list {
+  font-weight: normal;
+}
+
+div.simpletest-pass {
+  color: #33a333;
+}
+.simpletest-fail {
+  color: #981010;
+}
+
+tr.simpletest-pass.odd {
+  background-color: #b6ffb6;
+}
+tr.simpletest-pass.even {
+  background-color: #9bff9b;
+}
+tr.simpletest-fail.odd {
+  background-color: #ffc9c9;
+}
+tr.simpletest-fail.even {
+  background-color: #ffacac;
+}
+tr.simpletest-exception.odd {
+  background-color: #f4ea71;
+}
+tr.simpletest-exception.even {
+  background-color: #f5e742;
+}
+tr.simpletest-debug.odd {
+  background-color: #eee;
+}
+tr.simpletest-debug.even {
+  background-color: #fff;
+}
+
+a.simpletest-collapse {
+  height: 0;
+  width: 0;
+  top: -99em;
+  position: absolute;
+}
+a.simpletest-collapse:focus,
+a.simpletest-collapse:hover {
+  font-size: 80%;
+  top: 0px;
+  height: auto;
+  width: auto;
+  overflow: visible;
+  position: relative;
+  z-index: 1000;
+}
diff --git a/core/modules/tour/css/tour-rtl.css b/core/modules/tour/css/tour.module-rtl.css
similarity index 100%
rename from core/modules/tour/css/tour-rtl.css
rename to core/modules/tour/css/tour.module-rtl.css
diff --git a/core/modules/tour/css/tour.css b/core/modules/tour/css/tour.module.css
similarity index 100%
rename from core/modules/tour/css/tour.css
rename to core/modules/tour/css/tour.module.css
diff --git a/core/modules/tour/tour.module b/core/modules/tour/tour.module
index fe9bc1a..8d96cfd 100644
--- a/core/modules/tour/tour.module
+++ b/core/modules/tour/tour.module
@@ -45,7 +45,7 @@ function tour_library_info() {
     'title' => 'Tour',
     'version' => VERSION,
     'css' => array(
-      $path . '/css/tour.css' => array('media' => 'screen'),
+      $path . '/css/tour.module.css' => array('media' => 'screen'),
     )
   );