diff gtk-3.0/_common.scss @ 0:a48477723cfe

Base Adwaita theme for GTK 3.16 https://github.com/GNOME/gnome-themes-standard/tree/gnome-3-14/themes/Adwaita @ 7c9d684 with gtk-3.0 directory replaced with https://github.com/GNOME/gtk/tree/gtk-3-16/gtk/theme/Adwaita @ ff9ee56
author IBBoard <dev@ibboard.co.uk>
date Sat, 09 Apr 2016 20:21:23 +0100
parents
children ca246bc0af4a
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line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gtk-3.0/_common.scss	Sat Apr 09 20:21:23 2016 +0100
@@ -0,0 +1,3379 @@
+@function gtkalpha($c,$a) {
+  @return unquote("alpha(#{$c},#{$a})");
+}
+
+$ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);
+
+* {
+  padding: 0;
+  -GtkToolButton-icon-spacing: 4;
+  -GtkTextView-error-underline-color: $error_color;
+
+  -GtkCheckButton-indicator-size: 16;
+  -GtkCheckMenuItem-indicator-size: 16;
+
+  // The size for scrollbars. The slider is 2px smaller, but we keep it
+  // up so that the whole area is sensitive to button presses for the
+  // slider. The stepper button is larger in both directions, the slider
+  // only in the width
+
+  -GtkScrolledWindow-scrollbar-spacing: 0;
+  -GtkScrolledWindow-scrollbars-within-bevel: 1;
+
+  -GtkToolItemGroup-expander-size: 11;
+  -GtkExpander-expander-size: 16;
+  -GtkTreeView-expander-size: 11;
+
+  -GtkTreeView-horizontal-separator: 4;
+
+  -GtkMenu-horizontal-padding: 0;
+  -GtkMenu-vertical-padding: 0;
+
+  -GtkWidget-link-color: $link_color;
+  -GtkWidget-visited-link-color: $link_visited_color;
+
+  -GtkWidget-focus-padding: 2;    // FIXME: do we still need these?
+  -GtkWidget-focus-line-width: 1; //
+
+  -GtkWidget-text-handle-width: 20;
+  -GtkWidget-text-handle-height: 20;
+
+  -GtkDialog-button-spacing: 4;
+  -GtkDialog-action-area-border: 0;
+
+  -GtkStatusbar-shadow-type: none;
+
+  // We use the outline properties to signal the focus properties
+  // to the adwaita engine: using real CSS properties is faster,
+  // and we don't use any outlines for now.
+
+  outline-color: transparentize($fg_color, 0.7);
+  outline-style: dashed;
+  outline-offset: -3px;
+  outline-width: 1px;
+  outline-radius: 2px;
+}
+
+
+/***************
+ * Base States *
+ ***************/
+
+.background {
+  color: $fg_color;
+  background-color: if($variant == 'light', darken($bg_color, 1.5%), $bg_color);
+
+  &:backdrop {
+    text-shadow: none;
+    icon-shadow: none;
+    color: $backdrop_fg_color;
+    background-color: $backdrop_bg_color;
+  }
+}
+
+/*
+   These wildcard seems unavoidable, need to investigate.
+   Wildcards are bad and troublesome, use them with care,
+   or better, just don't.
+   Everytime a wildcard is used a kitten dies, painfully.
+*/
+
+*:insensitive {
+  -gtk-image-effect: dim;
+}
+
+.gtkstyle-fallback {
+  background-color: $bg_color;
+  color: $fg_color;
+  &:prelight {
+    background-color: lighten($bg_color, 10%);
+    color: $fg_color;
+  }
+  &:active {
+    background-color: darken($bg_color, 10%);
+    color: $fg_color;
+  }
+  &:insensitive {
+    background-color: $insensitive_bg_color;
+    color: $insensitive_fg_color;
+  }
+  &:selected {
+    background-color: $selected_bg_color;
+    color: $selected_fg_color;
+  }
+}
+
+.view {
+  color: $text_color;
+  background-color: $base_color;
+
+  &:backdrop {
+    color: $backdrop_text_color;
+    background-color: $backdrop_base_color;
+  }
+
+  &:selected {
+    border-radius: 3px;
+    @extend %selected_items;
+  }
+}
+
+.rubberband {
+  border: 1px solid $selected_bg_color;
+  background-color: transparentize($selected_bg_color,0.8);
+}
+
+.label {
+  &.separator {
+    color: $fg_color;
+    @extend .dim-label;
+    &:backdrop { color: $backdrop_fg_color; }
+  }
+  &:selected,
+  &:selected:focus,
+  &:selected:hover {
+    @extend %selected_items;
+  }
+  &:insensitive {
+    color: $insensitive_fg_color;
+    &:backdrop { color: $backdrop_insensitive_color; }
+  }
+}
+
+.dim-label {
+  opacity: 0.55;
+  text-shadow: none;
+}
+
+GtkAssistant {
+  .sidebar {
+    background-color: $base_color;
+    border-top: 1px solid $borders_color;
+    &:dir(ltr) { border-right: 1px solid $borders_color; }
+    &:dir(rtl) { border-left: 1px solid $borders_color; }
+    &:backdrop {
+      background-color: $backdrop_base_color;
+      border-color: $backdrop_borders_color;
+    }
+  }
+  &.csd .sidebar { border-top-style: none; }
+  .sidebar .label {
+    padding: 6px 12px;
+  }
+  .sidebar .label.highlight {
+    background-color: mix($bg_color, $fg_color, 80%);
+  }
+}
+
+GtkTextView { // This will get overridden by .view, needed by gedit line numbers
+  background-color: mix($bg_color, $base_color, 50%);
+  &:backdrop { background-color: mix($backdrop_bg_color,
+                                     $backdrop_base_color, 50%); }
+}
+
+.grid-child {
+  padding: 3px;
+  border-radius: 3px;
+  &:selected {
+    @extend %selected_items;
+    outline-offset: -2px;
+  }
+}
+
+%osd, .osd {
+  color: $osd_fg_color;
+  border: none;
+  background-color: $osd_bg_color;
+  background-clip: padding-box;
+  outline-color: transparentize($osd_fg_color, 0.7);
+  box-shadow: none;
+  text-shadow: 0 1px black;
+  icon-shadow: 0 1px black;
+  &:backdrop { text-shadow: none; }
+}
+
+/*********************
+ * Spinner Animation *
+ *********************/
+
+@keyframes spin {
+  to { -gtk-icon-transform: rotate(1turn); }
+}
+
+.spinner {
+  background-image: none;
+  background-color: blue;
+  opacity: 0; // non spinning spinner makes no sense
+  -gtk-icon-source: -gtk-icontheme('process-working-symbolic');
+  &:active {
+    opacity: 1;
+    animation: spin 1s linear infinite;
+    &:insensitive {
+      opacity: 0.5;
+    }
+  }
+}
+
+/****************
+ * Text Entries *
+ ****************/
+
+.entry {
+  border: 1px solid;
+  padding: 5px 8px 6px;
+
+  &.image { // icons inside the entry
+    &.left { padding-left: 0; }
+    &.right { padding-right: 0; }
+  }
+
+  border-radius: 3px;
+  transition: all 200ms $ease-out-quad;
+  @include entry(normal);
+
+  &.flat, &.flat:focus {
+    padding: 2px;
+    @include entry(normal, $edge:none);
+    border: none;
+    border-radius: 0;
+  }
+
+  &:focus { @include entry(focus); }
+  &:insensitive { @include entry(insensitive); }
+  &:backdrop { @include entry(backdrop); }
+  &:backdrop:insensitive { @include entry(backdrop-insensitive); }
+
+  &:selected,
+  &:selected:focus {
+    @extend %selected_items;
+  }
+
+  &.progressbar {
+    margin: 1px;
+    border-radius: 0;
+    border-width: 0 0 2px;
+    border-color: $selected_bg_color;
+    border-style: solid;
+    background-image: none;
+    background-color: transparent;
+    box-shadow: none;
+    &:backdrop { background-color: transparent; }
+  }
+
+  .linked > & { //FIXME: use same buttons linking logic and template
+    border-radius: 0;
+    &:first-child {
+      border-top-left-radius: 3px;
+      border-bottom-left-radius: 3px;
+      &:dir(rtl) { border-right-style: none;}
+    }
+    &:last-child {
+      border-top-right-radius: 3px;
+      border-bottom-right-radius: 3px;
+      border-left-style: none;
+      &:dir(rtl) { border-left-style: solid; }
+    }
+  }
+
+  &.error { // FIXME: dark variant love needed
+    color: $error_color;
+    border-color: $error_color;
+    &:focus { @include entry(focus, $error_color); }
+    &:selected, &:selected:focus {
+      background-color: $error_color;
+    }
+  }
+
+  &.warning { // FIXME: dark variant love needed
+    color: $warning_color;
+    border-color: $warning_color;
+    &:focus { @include entry(focus, $warning_color); }
+    &:selected, &:selected:focus {
+      background-color: $warning_color;
+    }
+  }
+
+  &.image { // entry icons colors
+    color: mix($fg_color, $base_color, 80%);
+    &:hover { color: $fg_color; }
+    &:active { color: $selected_bg_color; }
+    &:backdrop { color: mix($backdrop_fg_color, $backdrop_base_color, 80%); }
+  }
+
+  .linked.vertical > & { //FIXME comment stuff and make the whole thing smarter.
+    @include entry(normal, $edge: none);
+    background-image: linear-gradient(to bottom, $base_color);
+    border-bottom-color: mix($borders_color, $base_color, 30%);
+    box-shadow: none;
+    @extend %linked_vertical;
+    &:focus {
+      border-color: entry_focus_border($selected_bg_color);
+      box-shadow: entry_focus_glow($selected_bg_color),
+                  0 -1px 0 0 entry_focus_border($selected_bg_color);
+      @extend %linked_vertical;
+    }
+    &:insensitive {
+      @include entry(insensitive, $edge: none);
+      border-bottom-color: mix($borders_color, $base_color, 30%);
+      @extend %linked_vertical;
+      &:backdrop {
+        @include entry(backdrop-insensitive, $edge: none);
+        border-bottom-color: mix($backdrop_borders_color, $backdrop_base_color, 30%);
+        @extend %linked_vertical;
+      }
+    }
+    &:backdrop {
+      @include entry(backdrop, $edge: none);
+      border-bottom-color: mix($backdrop_borders_color, $backdrop_base_color, 30%);
+      @extend %linked_vertical;
+    }
+    &:first-child {
+      @include entry(normal, $edge: none);
+      border-bottom-color: mix($borders_color, $base_color, 30%);
+      &:focus { @include entry(focus, $edge: none); }
+      &:insensitive {
+        @include entry(insensitive, $edge: none);
+        border-bottom-color: mix($backdrop_borders_color, $backdrop_base_color, 30%);
+        @extend %linked_vertical:first-child;
+        &:backdrop {
+          @include entry(backdrop-insensitive, $edge: none);
+          border-bottom-color: mix($backdrop_borders_color, $backdrop_base_color, 30%);
+          border-top-style: solid;
+        }
+      }
+      &:backdrop {
+        @include entry(backdrop, $edge: none);
+        border-bottom-color: mix($backdrop_borders_color, $backdrop_base_color, 30%);
+        @extend %linked_vertical:first-child;
+      }
+    }
+    &:last-child {
+      @include entry(normal);
+      background-image: linear-gradient(to bottom, $base_color);
+      box-shadow: _widget_edge();
+      &:focus {
+        border-color: entry_focus_border($selected_bg_color);
+        box-shadow: entry_focus_glow($selected_bg_color),
+                    0 -1px 0 0 entry_focus_border($selected_bg_color),
+                    _widget_edge();
+        @extend %linked_vertical:last-child;
+      }
+      &:insensitive {
+        @include entry(insensitive);
+        @extend %linked_vertical:last-child;
+        &:backdrop {
+          @include entry(backdrop-insensitive);
+          @extend %linked_vertical:last-child;
+        }
+      }
+      &:backdrop {
+        @include entry(backdrop);
+        @extend %linked_vertical:last-child;
+      }
+    }
+  }
+  .osd & {
+    @include entry(osd);
+    &:focus { @include entry(osd-focus); }
+    &:backdrop { @include entry(osd-backdrop); }
+    &:insensitive { @include entry(osd-insensitive); }
+  }
+}
+
+/***********
+ * Buttons *
+ ***********/
+
+// stuff for .needs-attention
+$_dot_color: if($variant=='light', $selected_bg_color,
+                                   lighten($selected_bg_color,15%));
+@keyframes needs_attention {
+  from {
+    background-image: -gtk-gradient(radial,
+                                    center center, 0,
+                                    center center, 0.01,
+                                    to($_dot_color),
+                                    to(transparent));
+  }
+  to {
+    background-image: -gtk-gradient(radial,
+                                    center center, 0,
+                                    center center, 0.5,
+                                    to($selected_bg_color),
+                                    to(transparent));
+  }
+}
+
+
+.button {
+
+  $_button_transition: all 200ms $ease-out-quad;
+
+  border: 1px solid;
+  border-radius: 3px;
+  padding: 5px 8px 6px;
+  transition: $_button_transition;
+  @include button(normal);
+  &.flat {
+    @include button(undecorated);
+    // to avoid adiacent buttons borders clashing when transitioning, the transition on the normal state is set
+    // to none, while it's added back in the hover state, so the button decoration will fade in on hover, but
+    // it won't fade out when the pointer leave the button allocation area. To make the transition more evident
+    // in this case the duration is increased.
+    transition: none;
+    &:hover {
+      transition: $_button_transition;
+      transition-duration: 500ms;
+      &:active { transition: $_button_transition; }
+    }
+  }
+  &:hover {
+    @include button(hover);
+    -gtk-image-effect: highlight;
+  }
+  &:active, &:checked {
+    @include button(active);
+    transition-duration: 50ms;
+  }
+  &:backdrop, &.flat:backdrop {
+    @include button(backdrop);
+    -gtk-image-effect: none;
+    &:active, &:checked {
+      @include button(backdrop-active);
+    }
+    &:insensitive {
+      @include button(backdrop-insensitive);
+    }
+    &:insensitive:active, &:insensitive:checked {
+      @include button(backdrop-insensitive-active);
+    }
+  }
+  &.flat:backdrop, &.flat:insensitive, &.flat:backdrop:insensitive {
+    @include button(undecorated);
+  }
+  &:insensitive {
+    @include button(insensitive);
+    &:active, &:checked {
+      @include button(insensitive-active);
+    }
+  }
+  // big standalone buttons like in Documents pager
+  &.osd {
+    &.image-button { padding: 13px; }
+    color: $osd_fg_color;
+    border-radius: 5px;
+    outline-color: transparentize($osd_fg_color, 0.7);  //FIXME: define a color var?
+    @include button(osd);
+    border: none;
+    box-shadow: none;
+    &:hover {
+      @include button(osd-hover);
+      border: none;
+      box-shadow: none;
+    }
+    &:active, &:checked {
+      @include button(osd-active);
+      border: none;
+      box-shadow: none;
+    }
+    &:insensitive, &:backdrop:insensitive {
+      @include button(osd-insensitive);
+      border: none;
+    }
+    &:backdrop {
+      @include button(osd-backdrop);
+      border: none;
+    }
+  }
+  //overlay / OSD style
+  .osd & {
+    @include button(osd);
+    // there's a problem with sass which prevents it to extend the linked
+    // placeholder as expected, it should just be "@extend %linked;", the
+    // placeholder is basically replicated here
+    //
+    // Workaround START
+    border-radius: 0;
+    border-left-style: none;
+    &:dir(rtl) {
+      border-radius: 0;
+      border-right-style: none;
+      border-left-style: solid
+    }
+    &:first-child {
+      border-radius: 3px 0 0 3px;
+      border-left-style: solid;
+    }
+    &:last-child {
+      border-radius: 0 3px 3px 0;
+      &:dir(rtl) { border-right-style: solid; }
+    }
+    &:only-child {
+      border-radius: 3px;
+      border-style: solid;
+    }
+    // Workaround END
+    &:hover {
+      @include button(osd-hover);
+      @extend %linked;
+    }
+    &:active, &:checked, &:backdrop:active, &:backdrop:checked {
+      @include button(osd-active);
+      @extend %linked;
+    }
+    &:insensitive, &:backdrop:insensitive {
+      @include button(osd-insensitive);
+      @extend %linked;
+    }
+    &:backdrop {
+      @include button(osd-backdrop);
+      @extend %linked;
+    }
+    &.flat {
+      @include button(undecorated);
+      box-shadow: none; //FIXME respect no edge on the button mixin
+      text-shadow: 0 1px black;
+      icon-shadow: 0 1px black;
+      &:hover {
+        @include button(osd-hover);
+        background-clip: padding-box;
+        border-color: transparent;
+        box-shadow: none;
+      }
+      &:insensitive {
+        @include button(osd-insensitive);
+        background-image: none;
+        border-color: transparent;
+        box-shadow: none;
+      }
+      &:backdrop { @include button(undecorated); }
+      &:active, &:checked {
+        @include button(osd-active);
+        background-clip: padding-box;
+        border-color: transparent;
+        box-shadow: none;
+      }
+    }
+  }
+
+  // Suggested and Destructive Action buttons
+  @each $b_type, $b_color in (suggested-action, $selected_bg_color),
+                              (destructive-action, $destructive_color) {
+    &.#{$b_type} {
+      @include button(normal, $b_color, white);
+      &.flat {
+        @include button(undecorated);
+        color: $b_color; //FIXME: does it work on the dark variant?
+      }
+      &:hover { @include button(hover, $b_color, white); }
+      &:active, &:checked { @include button(active, $b_color, white); }
+      &:backdrop, &.flat:backdrop {
+        @include button(backdrop, $b_color, white);
+        &:active, &:checked {
+          @include button(backdrop-active, $b_color, white);
+        }
+        &:insensitive {
+          @include button(backdrop-insensitive);
+          &:active, &:checked {
+            @include button(backdrop-insensitive-active, $b_color, white);
+          }
+        }
+      }
+      &.flat:backdrop, &.flat:insensitive, &.flat:backdrop:insensitive {
+        @include button(undecorated);
+        color: transparentize($b_color, 0.2);
+      }
+      &:insensitive {
+        @include button(insensitive);
+        &:active, &:checked {
+          @include button(insensitive-active, $b_color, white);
+        }
+      }
+      .osd & {
+        @include button(osd, $b_color);
+        @extend %linked;
+        &:hover {
+          @include button(osd-hover, $b_color);
+          @extend %linked;
+        }
+        &:active, &:checked, &:backdrop:active, &:backdrop:checked {
+          @include button(osd-active, $b_color);
+          @extend %linked;
+        }
+        &:insensitive, &:backdrop:insensitive {
+          @include button(osd-insensitive, $b_color);
+          @extend %linked;
+        }
+        &:backdrop {
+          @include button(osd-backdrop, $b_color);
+          @extend %linked;
+        }
+      }
+    }
+  }
+
+  &.image-button { padding: 8px; }
+
+  &.text-button {
+    padding-left: 16px;
+    padding-right: 16px;
+  }
+
+  &.text-button.image-button {
+    // those buttons needs uneven horizontal padding, we want the icon side
+    // to have the image-button padding, while the text side the text-button
+    // one, so we're adding the missing padding to the label depending on
+    // its position inside the button
+    padding: 5px 8px 6px; // same as .button
+    .label:first-child { padding-left: 8px; }
+    .label:last-child { padding-right: 8px; }
+  }
+
+  .stack-switcher > & {
+    // to position the needs attention dot, padding is added to the button
+    // child, a label needs just lateral padding while an icon needs vertical
+    // padding added too.
+
+    outline-offset: -3px; // needs to be set or it gets overriden by GtkRadioButton outline-offset
+
+    > .label {
+      padding-left: 6px;  // label padding
+      padding-right: 6px; //
+    }
+    > GtkImage {
+      padding-left: 6px;   // image padding
+      padding-right: 6px;  //
+      padding-top: 3px;    //
+      padding-bottom: 3px; //
+    }
+    &.text-button {
+      padding: 5px 10px 6px; // needed or it will get overridden
+    }
+    &.image-button {
+      // we want image buttons to have a 1:1 aspect ratio, so compensation
+      // of the padding added to the GtkImage is needed
+      padding: 5px 2px;
+    }
+    &.needs-attention > .label,
+    &.needs-attention > GtkImage { @extend %needs_attention; }
+    &.needs-attention:active > .label,
+    &.needs-attention:active > GtkImage,
+    &.needs-attention:checked > .label,
+    &.needs-attention:checked > GtkImage {
+      animation: none;
+      background-image: none;
+    }
+  }
+
+  //inline-toolbar buttons
+  .inline-toolbar &, .inline-toolbar &:backdrop {
+    border-radius: 2px;
+    border-width: 1px;
+    @extend %linked;
+  }
+
+  .primary-toolbar & { icon-shadow: none; } // tango icons don't need shadows
+
+  .linked > &,
+  .linked > &:hover,
+  .linked > &:active,
+  .linked > &:checked,
+  .linked > &:backdrop { @extend %linked; }
+
+  .linked.vertical > &,
+  .linked.vertical > &:hover,
+  .linked.vertical > &:active,
+  .linked.vertical > &:checked,
+  .linked.vertical > &:backdrop { @extend %linked_vertical; }
+}
+
+%needs_attention {
+  animation: needs_attention 150ms ease-in;
+  $_dot_shadow: _text_shadow_color();
+  $_dot_shadow_r: if($variant=='light',0.5,0.45);
+  background-image: -gtk-gradient(radial,
+                                  center center, 0,
+                                  center center, 0.5,
+                                  to($_dot_color),
+                                  to(transparent)),
+                    -gtk-gradient(radial,
+                                  center center, 0,
+                                  center center, $_dot_shadow_r,
+                                  to($_dot_shadow),
+                                  to(transparent));
+  background-size: 6px 6px, 6px 6px;
+  background-repeat: no-repeat;
+  @if $variant == 'light' { background-position: right 3px, right 4px; }
+  @else { background-position: right 3px, right 2px; }
+  &:backdrop { background-size: 6px 6px, 0 0;}
+  &:dir(rtl) {
+    @if $variant == 'light' { background-position: left 3px, left 4px; }
+    @else { background-position: left 3px, left 2px; }
+  }
+}
+
+
+// all the following is for the +|- buttons on inline toolbars, that way
+// should really be deprecated...
+.inline-toolbar GtkToolButton > .button { // redefining the button look is
+                                          // needed since those are flat...
+  @include button(normal);
+  &:hover { @include button(hover); }
+  &:active,
+  &:checked{ @include button(active); }
+  &:insensitive { @include button(insensitive); }
+  &:insensitive:active,
+  &:insensitive:checked { @include button(insensitive-active); }
+  &:backdrop { @include button(backdrop); };
+  &:backdrop:active,
+  &:backdrop:checked { @include button(backdrop-active); }
+  &:backdrop:insensitive { @include button(backdrop-insensitive); }
+  &:backdrop:insensitive:active,
+  &:backdrop:insensitive:checked {
+    @include button(backdrop-insensitive-active); }
+}
+
+// More inline toolbar buttons
+.inline-toolbar.toolbar GtkToolButton,
+.inline-toolbar.toolbar GtkToolButton:backdrop {
+  & > .button.flat { @extend %linked_middle; }
+  &:dir(rtl) > .button.flat { @extend %linked_middle:dir(rtl); }
+  &:first-child > .button.flat { @extend %linked:first-child; }
+  &:last-child > .button.flat { @extend %linked:last-child; }
+  &:last-child:dir(rtl) > .button.flat { @extend %linked:last-child:dir(rtl); }
+  &:only-child > .button.flat { @extend %linked:only-child; }
+}
+
+%linked_middle {
+  border-radius: 0;
+  border-left-style: none;
+  &:dir(rtl) {
+    border-radius: 0; // needed when including %linked_middle:dir(rtl)
+    border-right-style: none;
+    border-left-style: solid
+  }
+}
+
+%linked {
+  @extend %linked_middle;
+  &:first-child {
+    border-radius: 3px 0 0 3px;
+    border-left-style: solid;
+  }
+  &:last-child {
+    border-radius: 0 3px 3px 0;
+    &:dir(rtl) { border-right-style: solid; }
+  }
+  &:only-child {
+    border-radius: 3px;
+    border-style: solid;
+  }
+}
+
+%linked_vertical_middle {
+  border-left-style: solid;
+  border-top-style: none;
+  border-radius: 0;
+}
+
+%linked_vertical{
+  @extend %linked_vertical_middle;
+  &:first-child {
+    border-style: solid;
+    border-radius: 3px 3px 0 0;
+  }
+  &:last-child {
+    border-radius: 0 0 3px 3px;
+  }
+  &:only-child {
+    border-radius: 3px;
+    border-style: solid;
+  }
+}
+
+%undecorated_button {
+  border-color: transparent;
+  background-color: transparent;
+  background-image: none;
+  box-shadow: inset 0 1px transparentize(white,1),
+              0 1px transparentize(white, 1);
+  text-shadow: none;
+  icon-shadow: none;
+}
+
+/* menu buttons */
+.menuitem.button.flat {
+  @extend %undecorated_button;
+  outline-offset: -1px;
+  &:hover { background-color: mix($fg_color, $bg_color, 10%); }
+  &:selected { @extend %selected_items; }
+  &:backdrop, &:backdrop:hover {
+    @extend %undecorated_button;
+  }
+}
+
+
+GtkColorButton.button {
+  padding: 5px; // Uniform padding on the GtkColorButton
+
+  GtkColorSwatch:first-child:last-child { // :first-child:last-child for a specificity bump, it gets overridden by the
+                                          // colorpicker style, otherwise
+    border-radius: 0;
+    box-shadow: inset 0 1px 1px transparentize(black, 0.9),
+                _widget_edge();
+    &:insensitive,
+    &:backdrop { box-shadow: none; }
+  }
+}
+
+/*********
+ * Links *
+ *********/
+
+*:link {
+  color: $link_color;
+  &:visited {
+    color: $link_visited_color;
+    *:selected & { color: mix($selected_fg_color, $selected_bg_color, 60%); }
+  }
+  &:hover {
+    color: lighten($link_color,10%);
+    *:selected & { color: mix($selected_fg_color, $selected_bg_color, 90%); }
+  }
+  &:active {
+    color: $link_color;
+    *:selected & { color: mix($selected_fg_color, $selected_bg_color, 80%); }
+  }
+  &:backdrop, &:backdrop:hover, &:backdrop:hover:selected {
+    color: $selected_bg_color;
+  }
+  &:selected, *:selected & {
+    color: mix($selected_fg_color, $selected_bg_color, 80%);
+  }
+}
+
+.button:link, .button:visited {
+  @extend %undecorated_button;
+  @extend *:link;
+  text-shadow: none;
+  &:hover, &:active, &:checked {
+    @extend %undecorated_button;
+    text-shadow: none;
+  }
+  &:backdrop {
+    @extend %undecorated_button; //This shouldn't be needed but avoids
+                                 //a weird transition which for some reason
+                                 //makes borders blink on hover
+  }
+}
+
+/*****************
+ * GtkSpinButton *
+ *****************/
+
+.spinbutton {
+  .button {
+    background-image: none;
+    border-style: none none none solid;
+    border-color: transparentize($borders_color, 0.7);
+    color: mix($fg_color, $base_color, 90%);
+    border-radius: 0;
+    box-shadow: none;
+  //  padding-left: 6px;
+  //  padding-right: 6px;
+    &:dir(rtl) { border-style: none solid none none; }
+    &:hover {
+      color: $fg_color;
+      background-color: transparentize($fg_color, 0.95);
+    }
+    &:insensitive {
+      color: transparentize($insensitive_fg_color, 0.7);
+    }
+    &:active {
+      box-shadow: inset 0 2px 3px -1px transparentize(black, 0.8);
+      background-color: transparentize(black, 0.9);
+    }
+    &:backdrop {
+      color: mix($backdrop_fg_color, $backdrop_base_color, 90%);
+      border-color: transparentize($backdrop_borders_color, 0.7);
+      background-color: transparent;
+    }
+    &:backdrop:insensitive {
+      background-image: none;
+      color: transparentize($backdrop_insensitive_color,0.7);
+      border-style: none none none solid; // It is needed or it gets overridden
+      &:dir(rtl) { border-style: none solid none none; }
+    }
+  }
+  .osd & {
+    .button {
+      @include button(undecorated);
+      color: $osd_fg_color;
+      border-style: none none none solid;
+      border-color: transparentize($osd_borders_color, 0.3);
+      border-radius: 0;
+      box-shadow: none;
+      icon-shadow: 0 1px black;
+      &:dir(rtl) { border-style: none solid none none; }
+      &:hover {
+        @include button(undecorated);
+        color: $osd_fg_color;
+        border-color: transparentize(opacify($osd_borders_color, 1), 0.5);
+        background-color: transparentize($osd_fg_color, 0.9);
+        icon-shadow: 0 1px black;
+        box-shadow: none;
+      }
+      &:backdrop {
+        @include button(undecorated);
+        color: $osd_fg_color;
+        border-color: transparentize(opacify($osd_borders_color, 1), 0.5);
+        icon-shadow: none;
+        box-shadow: none;
+      }
+      &:insensitive {
+        @include button(undecorated);
+        color: $osd_insensitive_fg_color;
+        border-color: transparentize(opacify($osd_borders_color, 1), 0.5);
+        icon-shadow: none;
+        box-shadow: none;
+      }
+      &:last-child { border-radius: 0 3px 3px 0; }
+      &:dir(rtl):first-child { border-radius: 3px 0 0 3px; }
+    }
+  }
+  &.vertical, &.vertical:dir(rtl) { //FIXME: try using linking templates for vertically linked stuff
+    .button {
+      padding-top: 8px;    //  Same vertical padding as image-buttons
+      padding-bottom: 8px; //
+      &:first-child {
+        @extend %top_button;
+        @include button(normal, $edge:none);
+        &:active {
+          @extend %top_button;
+          @include button(active, $edge:none);
+        }
+        &:hover {
+          @extend %top_button;
+          @include button(hover, $edge:none);
+        }
+        &:insensitive {
+          @extend %top_button;
+          @include button(insensitive, $edge:none);
+        }
+        &:backdrop {
+          @extend %top_button;
+          @include button(backdrop, $edge:none);
+        }
+      }
+      &:last-child {
+        @extend %bottom_button;
+        @include button(normal);
+        &:active {
+          @extend %bottom_button;
+          @include button(active);
+        }
+        &:hover {
+          @extend %bottom_button;
+          @include button(hover);
+        }
+        &:insensitive {
+          @extend %bottom_button;
+          @include button(insensitive);
+        }
+        &:backdrop {
+          @extend %bottom_button;
+          @include button(backdrop);
+        }
+      }
+      &:backdrop:insensitive {
+        @include button(backdrop-insensitive);
+      }
+    }
+    &.entry {
+      // we should remove the bottom edge hilight here, but seems
+      // like buttons are on top of it so it doesn't show up
+      border-radius: 0;
+      padding-left: 3px;
+      padding-right: 3px;
+    }
+    %top_button {
+      border-radius: 3px 3px 0 0;
+      border-style: solid solid none solid;
+    }
+    %bottom_button {
+      border-radius: 0 0 3px 3px;
+      border-style: none solid solid solid;
+    }
+  }
+  GtkTreeView & {
+    &.entry, &.entry:focus {
+      padding: 1px;
+      border-width: 1px 0;
+      border-color: $selected_bg_color;
+      border-radius: 0;
+      box-shadow: none;
+    }
+  }
+}
+
+/**************
+ * ComboBoxes *
+ **************/
+GtkComboBox {
+  > .button { padding-top: 3px; padding-bottom: 4px; } // Otherwise combos
+                                                       // are bigger then
+                                                       // buttons
+  -GtkComboBox-arrow-scaling: 0.5;
+  -GtkComboBox-shadow-type: none;
+
+  box-shadow: 0 1px $borders_edge;
+
+  @include _button_text_shadow;
+
+  &:insensitive {
+    color: $insensitive_fg_color;
+    text-shadow: none;
+    icon-shadow: none;
+  }
+  &:backdrop {
+    color: $backdrop_fg_color;
+    text-shadow: none;
+    icon-shadow: none;
+  }
+  &:backdrop:insensitive {
+    color: $backdrop_insensitive_color;
+  }
+  .menuitem { text-shadow: none; }
+  .separator.vertical {
+    // always disable separators
+    -GtkWidget-wide-separators: true;
+  }
+  &.combobox-entry .entry { @extend %linked; }
+  &.combobox-entry .button, &.combobox-entry .button:backdrop {
+    // It is needed to specify the backdrop button or it gets overridden
+    @extend %linked;
+  }
+}
+
+.linked > GtkComboBox > .button {
+  // the combo is a composite widget so the way we do button linkind doesn't
+  // work, special case needed. See
+  // https://bugzilla.gnome.org/show_bug.cgi?id=733979
+  &:dir(ltr) { @extend %linked_middle; } // specificity bump
+  &:dir(rtl) { @extend %linked_middle:dir(rtl); }
+}
+.linked > GtkComboBox:first-child > .button {
+  @extend %linked:first-child;
+}
+.linked > GtkComboBox:last-child > .button {
+  @extend %linked:last-child;
+}
+.linked > GtkComboBox:only-child > .button {
+  @extend %linked:only-child;
+}
+.linked.vertical > GtkComboBoxText > .button,
+.linked.vertical > GtkComboBox > .button { @extend %linked_vertical_middle; }
+.linked.vertical > GtkComboBoxText:first-child > .button,
+.linked.vertical > GtkComboBox:first-child > .button { @extend %linked_vertical:first-child; }
+.linked.vertical > GtkComboBoxText:last-child > .button,
+.linked.vertical > GtkComboBox:last-child > .button { @extend %linked_vertical:last-child; }
+.linked.vertical > GtkComboBoxText:only-child > .button,
+.linked.vertical > GtkComboBox:only-child > .button { @extend %linked_vertical:only-child; }
+
+/************
+ * Toolbars *
+ ************/
+.toolbar {
+  -GtkWidget-window-dragging: true;
+  padding: 4px;
+  background-color: $bg_color;
+  .osd &, &.osd {
+    padding: 13px;
+    border: none;
+    border-radius: 5px;
+    background-color: $osd_bg_color;
+  }
+}
+
+//searchbar, location-bar & inline-toolbar
+.inline-toolbar {
+  @extend .toolbar;
+  @extend %inset-bar;
+  border-width: 0 1px 1px;
+  padding: 3px;
+  border-radius: 0  0 5px 5px;
+}
+.search-bar, .location-bar {
+  @extend .toolbar;
+  @extend %inset-bar;
+  border-width: 0 0 1px;
+  padding: 3px;
+}
+
+%inset-bar {
+  border-style: solid;
+  border-color: $borders_color;
+  $_bg: mix($bg_color, $borders_color, 70%);
+  background-color: $_bg;
+  box-shadow: inset 0 2px 3px -1px mix($borders_color, $_bg, 60%),
+              _widget_edge();
+  //FIXME edge would be nice, but doesn't work
+  &:backdrop {
+    border-color: $backdrop_borders_color;
+    background-color: $backdrop_dark_fill;
+    box-shadow: none;
+  }
+}
+
+/***************
+ * Header bars *
+ ***************/
+
+.titlebar,
+.header-bar {
+  padding: 6px;
+  border-width: 0 0 1px;
+  border-style: solid;
+  border-color: $borders_color;
+  border-radius: 7px 7px 0 0;
+  background-color: transparent;
+
+  @include headerbar_fill;
+
+  &:backdrop {
+    border-color: $backdrop_borders_color;
+    background-color: $bg_color;
+    background-image: none;
+    box-shadow: inset 0 1px $top_hilight;
+  }
+
+  .title {
+    font-weight: bold;
+    padding-left: 12px;
+    padding-right: 12px;
+  }
+
+  .subtitle {
+    font-size: smaller;
+    padding-left: 12px;
+    padding-right: 12px;
+    @extend .dim-label;
+  }
+
+  .header-bar-separator,
+  & > GtkBox > .separator.vertical {
+    -GtkWidget-wide-separators: true;
+    -GtkWidget-separator-width: 1px;
+    border-width: 0 1px;
+    border-image: linear-gradient(to bottom,
+                                  transparentize($borders_color,1),
+                                  $borders_color 30%,
+                                  $borders_color 70%,
+                                  transparentize($borders_color,1) 100%)
+                  0 1 / 0 1px stretch; //FIXME use a proper color
+
+    &:backdrop {
+      border-image: linear-gradient(to bottom, transparentize($backdrop_borders_color, 0.5))
+                    0 1 / 1px 1px;  //FIXME use a proper color
+    }
+  }
+
+  &.selection-mode {
+    $_hc: mix($top_hilight,$selected_bg_color, 50%); // hilight color
+
+    color: $selected_fg_color;
+    text-shadow: 0 -1px transparentize(black, 0.5);
+    border-color: $selected_borders_color;
+    background-image: linear-gradient(to bottom,
+                                      lighten($selected_bg_color,5%),
+                                      $selected_bg_color);
+    box-shadow: inset 0 -1px mix($selected_borders_color, $selected_bg_color, 35%), //bottom shade
+                inset 0 1px $_hc;
+
+    &:backdrop {
+      background-image: linear-gradient(to bottom, $selected_bg_color);
+      box-shadow: inset 0 1px mix($top_hilight, $selected_bg_color, 60%);
+    }
+
+    .subtitle:link { @extend *:link:selected;  }
+
+    .button {
+      @include button(normal, $selected_bg_color, $selected_fg_color, $_hc);
+
+      &.flat { @include button(undecorated); }
+
+      &:hover { @include button(hover, $selected_bg_color, $selected_fg_color, $_hc); }
+
+      &:active, &:checked { @include button(active, $selected_bg_color, $selected_fg_color, $_hc); }
+
+      &:backdrop,
+      &.flat:backdrop {
+        @include button(backdrop, $selected_bg_color, $selected_fg_color, $_hc);
+        -gtk-image-effect: none;
+        border-color: $selected_borders_color;
+
+        &:active,
+        &:checked {
+          @include button(backdrop-active, $selected_bg_color, $selected_fg_color, $_hc);
+          border-color: $selected_borders_color;
+        }
+
+        &:insensitive {
+          @include button(backdrop-insensitive, $selected_bg_color, $selected_fg_color, $_hc);
+          border-color: $selected_borders_color;
+        }
+
+        &:insensitive:active,
+        &:insensitive:checked {
+          @include button(backdrop-insensitive-active, $selected_bg_color,
+                          $selected_fg_color, $_hc);
+          border-color: $selected_borders_color;
+        }
+      }
+
+      &.flat:backdrop,
+      &.flat:insensitive,
+      &.flat:insensitive:backdrop {
+        @include button(undecorated);
+      }
+
+      &:insensitive {
+        @include button(insensitive, $selected_bg_color, $selected_fg_color, $_hc);
+
+        &:active, &:checked { @include button(insensitive-active, $selected_bg_color, $selected_fg_color, $_hc); }
+      }
+
+      &.suggested-action {
+        @include button(normal, $edge:$_hc);
+        border-color: $selected_borders_color;
+
+        &:hover {
+          @include button(hover, $edge:$_hc);
+          border-color: $selected_borders_color;
+        }
+
+        &:active {
+          @include button(active, $edge:$_hc);
+          border-color: $selected_borders_color;
+        }
+
+        &:insensitive {
+          @include button(insensitive, $edge:$_hc);
+          border-color: $selected_borders_color;
+        }
+
+        &:backdrop {
+          @include button(backdrop, $edge:$_hc);
+          border-color: $selected_borders_color;
+        }
+
+        &:backdrop:insensitive {
+          @include button(backdrop-insensitive, $edge:$_hc);
+          border-color: $selected_borders_color;
+        }
+      }
+    }
+
+    .selection-menu {
+      border-color: transparentize($selected_bg_color, 1);
+      background-image: linear-gradient(to bottom, transparentize($selected_bg_color, 1));
+      box-shadow: none;
+      padding-left: 10px;
+      padding-right: 10px;
+
+      GtkArrow { -GtkArrow-arrow-scaling: 1; }
+
+      .arrow {
+        -gtk-icon-source: -gtk-icontheme('pan-down-symbolic');
+        color: transparentize($selected_fg_color,0.5);
+        icon-shadow: none;
+      }
+
+      &:backdrop { @extend .selection-menu };
+    }
+  }
+
+  .tiled &, .maximized & {
+    border-radius: 0; // squared corners when the window is max'd or tiled
+  }
+
+  &.default-decoration {
+    padding: 4px;
+    .button { padding: 5px; }
+  }
+}
+
+/************
+ * Pathbars *
+ ************/
+
+.path-bar .button {
+  padding: 5px 6px 6px;
+  &:first-child { padding-left: 8px; }
+  &:last-child { padding-right: 8px; }
+  &:only-child {
+    padding-left: 12px;
+    padding-right: 12px;
+  }
+
+  // the following is for spacing the icon and the label inside the home button
+  .label:last-child { padding-left: 2px; }
+  .label:first-child { padding-right: 2px; }
+  .label:only-child { padding-right: 0; padding-left: 0; }
+  GtkImage { padding-top: 1px; }
+}
+
+/**************
+ * Tree Views *
+ **************/
+GtkTreeView.view {
+  -GtkTreeView-grid-line-width: 1;
+  -GtkTreeView-grid-line-pattern: '';
+  -GtkTreeView-tree-line-width: 1;
+  -GtkTreeView-tree-line-pattern: '';
+  -GtkTreeView-expander-size: 16;
+
+  border-left-color: mix($fg_color, $base_color, 50%); // this is actually the tree lines color,
+  border-top-color: $bg_color;                         // while this is the grid lines color, better then nothing
+
+  &:selected { border-radius: 0; } // rest border radius in lists
+
+  &:selected, &:backdrop:selected {
+    border-left-color: mix($selected_fg_color, $selected_bg_color, 50%);
+    border-top-color: transparentize($fg_color, 0.9); // doesn't work unfortunatelly
+  }
+
+  &:insensitive {
+    color: $insensitive_fg_color;
+    &:selected {
+      color: mix($selected_fg_color, $selected_bg_color, 40%);
+      &:backdrop { color: mix($backdrop_selected_fg_color, $selected_bg_color, 30%); }
+    }
+    &:backdrop { color: $backdrop_insensitive_color; }
+  }
+
+  &.separator:backdrop {
+    color: transparentize(black, 0.9);
+  }
+
+  &:backdrop {
+    border-left-color: mix($backdrop_fg_color, $backdrop_bg_color, 50%);
+    border-top: $backdrop_bg_color;
+  }
+
+  &.dnd {
+    border-style: solid none;
+    border-width: 1px;
+    border-color: mix($fg_color, $selected_bg_color, 50%);
+  }
+
+  &.expander {
+    -gtk-icon-source: -gtk-icontheme('pan-end-symbolic');
+    &:dir(rtl) { -gtk-icon-source: -gtk-icontheme('pan-end-symbolic-rtl'); }
+    color: mix($fg_color, $base_color, 70%);
+    &:hover { color: $fg_color; }
+    &:selected {
+      color: mix($selected_fg_color, $selected_bg_color, 70%);
+      &:hover { color: $selected_fg_color; }
+      &:backdrop { color: mix($backdrop_selected_fg_color, $selected_bg_color, 70%); }
+    }
+
+    &:checked { -gtk-icon-source: -gtk-icontheme('pan-down-symbolic'); }
+
+    &:backdrop { color: mix($backdrop_fg_color, $backdrop_base_color, 70%); }
+  }
+
+  &.progressbar { // progress bar in treeviews
+    @if $variant == light { color: $base_color; }
+
+    border: 1px solid $selected_borders_color;
+    border-radius: 4px;
+    background-image: linear-gradient(to bottom,
+                                      $selected_bg_color,
+                                      darken($selected_bg_color,10%));
+    box-shadow: inset 0 1px if($variant=='light', transparentize(white,0.7),
+                                                  transparentize(white,0.85)),
+                      0 1px if($variant=='light', transparentize(black, 0.8),
+                                                  transparentize(black,0.9));
+
+    &:selected {
+      @if $variant == 'light' {
+         color: $selected_bg_color;
+         box-shadow: none;
+      }
+
+      @else { box-shadow: inset 0 1px transparentize(white, 0.95); }
+
+      background-image: linear-gradient(to bottom,
+                                        $base_color,
+                                        darken($base_color,10%));
+
+      &:backdrop {
+        @if $variant == 'light' {
+          color: $selected_bg_color;
+          border-color: $selected_borders_color; // otherwise it gets inherited by .view(?!?)
+        }
+        @else { border-color: $backdrop_base_color; }
+        background-color: $backdrop_base_color;
+      }
+    }
+
+    &:backdrop {
+      @if $variant == 'light' { color: $backdrop_base_color; }
+      @else { border-color: $backdrop_base_color; }
+      background-image: none;
+      box-shadow: none;
+    }
+  }
+
+  &.trough { // progress bar trough in treeviews
+    background-color: transparentize($fg_color,0.9);
+    border-radius: 4px;
+
+    &:selected {
+      background-color: if($variant == 'light',
+                           transparentize($selected_fg_color, 0.7),
+                           darken($selected_bg_color, 10%));
+      @if $variant == 'light' {
+        border-width: 1px 0;
+        border-style: solid;
+        border-color: $selected_bg_color;
+      }
+    }
+  }
+}
+
+column-header {
+  .button {
+    @extend %column_header_button;
+    $_column_header_color: mix($fg_color, $base_color, 50%);
+    color: $_column_header_color;
+    background-color: $base_color;
+    font-weight: bold;
+    text-shadow: none;
+    box-shadow: none;
+    &:hover {
+      @extend %column_header_button;
+      color: mix($_column_header_color, $fg_color, 50%);
+      box-shadow: none;
+      transition: none; //I shouldn't need this
+    }
+    &:active {
+      @extend %column_header_button;
+      color: $fg_color;
+      transition: none; //I shouldn't need this
+    }
+    &.dnd {
+      @extend column-header.button.dnd;
+    }
+  }
+  &:last-child .button,
+  &:last-child .button:backdrop, // set :backdrop too or the border will be visibile there
+  &:last-child.button,
+  &:last-child.button:backdrop { //treeview-like derived widgets in Banshee and Evolution
+    border-right-style: none;
+  }
+}
+
+column-header.button.dnd { // for treeview-like derive widgets
+  transition: none;
+  color: $selected_bg_color;
+  box-shadow: inset 1px 1px 0 1px $selected_bg_color,
+              inset -1px 0 0 1px $selected_bg_color,
+              inset 1px 1px $base_color, inset -1px 0 $base_color;;
+  &:active { @extend column-header.button.dnd; }
+  &:selected { @extend column-header.button.dnd; }
+  &:hover { @extend column-header.button.dnd; }
+}
+
+%column_header_button {
+  padding: 3px 6px;
+  border-style: none solid solid none;
+  border-radius: 0;
+  background-image: none;
+  border-color: $bg_color;
+  text-shadow: none;
+  &:insensitive {
+    border-color: $bg_color;
+    background-image: none;
+  }
+  &:backdrop {
+    border-color: $backdrop_bg_color;
+    border-style: none solid solid none;
+    color: mix($backdrop_fg_color, $backdrop_bg_color, 50%);
+    background-image: none;
+    background-color: $backdrop_base_color;
+    &:insensitive {
+      border-color: $backdrop_bg_color;
+      background-image: none;
+    }
+  }
+}
+
+
+/*********
+ * Menus *
+ *********/
+.menubar {
+  -GtkWidget-window-dragging: true;
+  padding: 0px;
+  box-shadow: inset 0 -1px transparentize(black, 0.9);
+  &:backdrop { background-color: $backdrop_bg_color; }
+  & > .menuitem {
+    padding: 4px 8px;
+    &:hover { //Seems like it :hover even with keyboard focus
+      box-shadow: inset 0 -3px $selected_bg_color;
+      color: $link_color;
+    }
+    &:insensitive {
+      color: $insensitive_fg_color;
+      box-shadow: none;
+    }
+  }
+}
+
+.menu {
+  margin: 4px;
+  padding: 0px;
+  background-color: $base_color;
+  border: 1px solid $borders_color; // adds borders in a non composited env
+  .csd & { border: none; }  // axes borders in a composited env
+  .menuitem {
+    text-shadow: none;
+    padding: 4px;
+    &:hover {
+      color: $selected_fg_color;
+      background-color: $selected_bg_color;
+    }
+    &:insensitive {
+      color: $insensitive_fg_color;
+      &:backdrop { color: $backdrop_insensitive_color; }
+    }
+    &:backdrop, &:backdrop:hover {
+      color: $backdrop_fg_color;
+      background-color: $backdrop_base_color;
+    }
+    //submenu indicators
+    &.arrow { -gtk-icon-source: -gtk-icontheme('pan-end-symbolic'); }
+    &.arrow:dir(rtl) {-gtk-icon-source:-gtk-icontheme('pan-end-symbolic-rtl'); }
+  }
+  &.button { // overlow buttons
+    @extend %undecorated_button;
+    border-style: none;
+    border-radius: 0;
+    &.top { border-bottom: 1px solid mix($fg_color, $base_color, 10%); }
+    &.bottom { border-top: 1px solid mix($fg_color, $base_color, 10%); }
+    &:hover { background-color: mix($fg_color, $base_color, 10%); }
+    &:insensitive {
+      color: transparent;
+      background-color: transparent;
+      border-color: transparent ;
+    }
+  }
+}
+
+.menuitem .accelerator { color: gtkalpha(currentColor,0.55); }
+
+
+/***************
+ * Popovers   *
+ ***************/
+
+.popover {
+  padding: 2px;
+  border: 1px solid $borders_color;
+  border-radius: 5px;
+  background-color: mix($bg_color, $base_color, 50%);
+
+  box-shadow: 0 1px 2px transparentize(black, 0.7);
+
+  &:backdrop {
+    box-shadow: none;
+  }
+
+  > .list,
+  > .view,
+  > .toolbar,
+  &.osd > .toolbar {
+    border-style: none;
+    background-color: transparent;
+  }
+
+  .button.flat,
+  .button.flat:hover {
+    text-shadow: none;
+    transition: none;
+  }
+
+  &.osd { @extend %osd; }
+}
+
+//touch selection handlebars for the Popover.osd above
+.entry.cursor-handle,
+.cursor-handle {
+  background-color: transparent;
+  background-image: none;
+  box-shadow: none;
+  border-style: none;
+  &.top { -gtk-icon-source: -gtk-icontheme('selection-start-symbolic'); }
+  &.bottom { -gtk-icon-source: -gtk-icontheme('selection-end-symbolic'); }
+}
+
+/*****************
+ * Notebooks and *
+ * Tabs          *
+ *****************/
+
+.notebook {
+  // Through me you go to the grief wracked city;
+  // Through me you go to everlasting pain;
+  // Through me you go a pass among lost souls.
+  // ...
+  // Abandon all hope — Ye Who Enter Here
+  padding: 0;
+  background-color: $base_color;
+  -GtkNotebook-initial-gap: 10;
+  -GtkNotebook-arrow-spacing: 5;
+  -GtkNotebook-tab-curvature: 0;
+  -GtkNotebook-tab-overlap: -8;
+  -GtkNotebook-has-tab-gap: false;
+  -GtkWidget-focus-padding: 0;
+  -GtkWidget-focus-line-width: 0;
+  transition: all 200ms $ease-out-quad;
+  &:backdrop {
+    background-color: $backdrop_base_color;
+  }
+  &.frame {
+    border: 1px solid $borders_color;
+    // FIXME doesn't work
+    &.top { border-top-width: 0; }
+    &.bottom { border-bottom-width: 0; }
+    &.right { border-right-width: 0; }
+    &.left { border-left-width: 0; }
+    &:backdrop { border-color: $backdrop_borders_color; }
+  }
+  &.header {
+    // FIXME: double borders in some case, can't fix it w/o a class tho
+    // FIXME: doesn't work on dark var
+    background-color: mix($bg_color, $borders_color, 70%);
+
+    // this is the shading of the header behind the tabs
+    &.frame {
+      border: 1px solid $borders_color;
+      &.top { border-bottom-width: 0; }
+      &.bottom { border-top-width: 0; }
+      &.right { border-left-width: 0; }
+      &.left { border-right-width: 0; }
+      &:backdrop { border-color: $backdrop_borders_color; }
+    }
+
+    $_header_shade: inset 0 2px 3px -1px transparentize(black, 0.85);
+    &.top {
+      box-shadow: $_header_shade,
+                  inset 0 -1px $borders_color; // border
+      &:backdrop { box-shadow: inset 0 -1px $backdrop_borders_color; }
+    }
+    &.bottom {
+      box-shadow: $_header_shade,
+                  inset 0 1px $borders_color;
+      &:backdrop { box-shadow: inset 0 1px $backdrop_borders_color; }
+    }
+    &.right {
+      box-shadow: $_header_shade,
+                  inset 1px 0 $borders_color;
+      &:backdrop { box-shadow: inset 1px 0 $backdrop_borders_color; }
+    }
+    &.left {
+      box-shadow: $_header_shade,
+                  inset -1px 0 $borders_color;
+      &:backdrop { box-shadow: inset -1px 0 $backdrop_borders_color; }
+    }
+    &:backdrop {
+      // same color as backdrop pushed button
+      background-color: $backdrop_dark_fill;
+      box-shadow: none;
+    }
+  }
+  tab {
+    border-width: 0;
+    border-style: solid;
+    border-color: transparent;
+    background-color: transparent;
+
+    outline-offset: 0;
+
+    $tab_indicator_size: 3px;
+    //vertical tab sizing
+    $vt_vpadding: 8px;
+    $vt_hpadding: 20px;
+    // horizontal tab sizing
+    $ht_vpadding: 5px;
+    $ht_hpadding: 20px;
+
+    //FIXME: we get double border in some cases, not considering the broken
+    //notebook content frame...
+    &.top, &.bottom { padding: $vt_vpadding $vt_hpadding; }
+    &.left, &.right { padding: $ht_vpadding $ht_hpadding; }
+
+
+    /* works for testnotebookdnd, but there's a superfluous border
+       in gedit or web, commented out for now, needs gtk fixes
+    &.reorderable-page {
+      &.top {
+        padding-top: ($vt_vpadding - 1px);
+        border-top-width: 1px;
+        border-left-width: 1px;
+        border-right-width: 1px;
+      }
+      &.bottom {
+        padding-bottom: ($vt_vpadding - 1px);
+        border-bottom-width: 1px;
+        border-left-width: 1px;
+        border-right-width: 1px;
+      }
+      &.left {
+        padding-left: ($ht_hpadding - 1px);
+        border-left-width: 1px;
+        border-top-width: 1px;
+        border-bottom-width: 1px;
+      }
+      &.right {
+        padding-right: ($ht_hpadding - 1px);
+        border-right-width: 1px;
+        border-top-width: 1px;
+        border-bottom-width: 1px;
+      }
+    }
+    */
+    &.reorderable-page {
+      &.top, &.bottom {
+        padding-left: 12px;  // for a nicer close button
+        padding-right: 12px; // placement
+        border-left-width: 1px;
+        border-right-width: 1px;
+      }
+      &.left, &.right {
+        border-bottom-width: 1px;
+        border-top-width: 1px;
+      }
+    }
+    &.top {
+      //padding-bottom: ($vt_vpadding -$tab_indicator_size);
+      border-bottom-width: $tab_indicator_size;
+    }
+    &.bottom {
+      //padding-top: ($vt_vpadding -$tab_indicator_size);
+      border-top-width: $tab_indicator_size;
+    }
+    &.left {
+      //padding-right: ($ht_hpadding -$tab_indicator_size);
+      border-right-width: $tab_indicator_size;
+    }
+    &.right {
+      //padding-left: ($ht_hpadding -$tab_indicator_size);
+      border-left-width: $tab_indicator_size;
+    }
+
+    //here's the interesting stuff
+    &:hover, &.prelight-page {
+      border-color: $borders_color;
+    }
+    &:active, &.active-page, &:backdrop:active {
+      border-color: $selected_bg_color;
+    }
+    &:backdrop {
+      background-color: transparent;
+      border-color: transparent;
+    }
+    @each $_tab, $_border in (top, bottom),
+                             (bottom, top),
+                             (left, right),
+                             (right, left) {
+      &.reorderable-page.#{$_tab} {
+        border-color: transparent;
+        &:hover, &.prelight-page {
+          border-color: transparentize($borders_color,0.7);
+          border-#{$_border}-color: $borders_color;
+          background-color: transparentize($bg_color,0.8);
+        }
+        &:active, &.active-page {
+          background-color: transparentize($bg_color,0.5);
+          border-color: transparentize($borders_color,0.5);
+          border-#{$_border}-color: $selected_bg_color;
+          &:hover { background-color: transparentize($bg_color,0.3); }
+          &:backdrop {
+            border-color: $backdrop_borders_color;
+            background-color: $backdrop_bg_color;
+            border-#{$_border}-color: $selected_bg_color;
+          }
+        }
+        &:backdrop {
+          border-color: transparent;
+          background-color: transparent;
+        }
+      }
+    }
+    .label { //tab text
+      padding: 0 2px; // needed for a nicer focus ring
+      font-weight: bold;
+      color: $insensitive_fg_color;
+      &:backdrop, &.prelight-page:backdrop {
+        color: mix($backdrop_fg_color, $backdrop_insensitive_color, 50%);
+      }
+    }
+    .prelight-page .label, .label.prelight-page {
+      // prelight tab text
+      color: mix($fg_color, $insensitive_fg_color, 50%);
+      &:backdrop { // FIXME, it's the same as .label:backdrop up here
+        color: mix($backdrop_fg_color, $backdrop_insensitive_color, 50%);
+      }
+    }
+    .active-page .label, .label.active-page {
+      // active tab text
+      color: $fg_color;
+      &:backdrop { color: $backdrop_fg_color; }
+    }
+    .button { //tab close button
+      padding: 0;
+      border: 1px solid transparent;
+      @extend %undecorated_button;
+      icon-shadow: none;
+      transition: none;
+      color: transparentize($fg_color,0.7);
+      &:hover {
+        color:  $fg_color;
+        @include button(hover, $edge:none);
+        background-image: none;
+        box-shadow: none;
+      }
+      &:active {
+        @include button(active, $edge:none);
+      }
+      &:backdrop {
+        color: transparentize($backdrop_fg_color,0.7);
+        border-color: transparent;
+      }
+      & > GtkImage { // this is a hack which makes tabs grow
+        padding: 2px;
+      }
+    }
+  }
+  &.arrow {
+    color: $insensitive_fg_color;
+    &:hover { color: mix($fg_color, $insensitive_fg_color, 50%); }
+    &:active { color: $fg_color; }
+    &:insensitive {
+      color: transparentize($insensitive_fg_color,0.7);
+    }
+    &:backdrop {
+      color: transparentize($backdrop_fg_color,0.6);
+      &:insensitive {
+        color: $backdrop_insensitive_color;
+      }
+    }
+  }
+}
+
+/**************
+ * Scrollbars *
+ **************/
+
+.scrollbar {
+  -GtkRange-slider-width: 13;
+  -GtkRange-trough-border: 0;
+  -GtkScrollbar-has-backward-stepper: false;
+  -GtkScrollbar-has-forward-stepper: false;
+  -GtkScrollbar-min-slider-length: 42; // minimum size for the slider.
+                                       // sadly can't be in '.slider'
+                                       // where it belongs
+  -GtkRange-stepper-spacing: 0;
+  -GtkRange-trough-under-steppers: 1;
+
+  $_slider_margin: 3px;
+  $_slider_fine_tune_margin: 4px;
+
+  .button {
+    border: none;
+  }
+
+  &.overlay-indicator {
+    &:not(.dragging):not(.hovering) { // Overlay scrolling indicator
+      opacity: 0.4;
+
+      -GtkRange-slider-width: 5px;
+
+      .slider {
+        margin: 0;
+        background-color: $fg_color;
+        border: 1px solid if($variant==light, white, black);
+        background-clip: padding-box;
+      }
+
+      .trough {
+        border-style: none;
+        background-color: transparent;
+      }
+
+      // w/o the following margin tweaks the slider shrinks when hovering/dragging
+      &.vertical .slider {
+        margin-top: $_slider_margin - 1px;
+        margin-bottom: $_slider_margin - 1px;
+      }
+
+      &.horizontal .slider {
+        margin-left: $_slider_margin - 1px;
+        margin-right: $_slider_margin - 1px;
+      }
+
+    }
+
+    &.dragging,
+    &.hovering { opacity: 0.7; }
+  }
+
+  // trough coloring
+  .trough {
+    background-color: $scrollbar_bg_color;
+    border: 1px none $borders_color;
+
+    &:backdrop {
+      background-color: $backdrop_scrollbar_bg_color;
+      border-color: $backdrop_borders_color;
+    }
+  }
+
+  // slider coloring
+  .slider {
+    background-color: mix($fg_color, $bg_color, 60%);
+
+    &:hover { background-color: mix($fg_color, $bg_color, 80%); }
+
+    &:prelight:active { background-color: if($variant=='light', darken($selected_bg_color, 10%), lighten($selected_bg_color, 10%));}
+
+    &:backdrop { background-color: mix($backdrop_fg_color, $backdrop_bg_color, 40%); }
+
+    &:insensitive {
+      background-color: transparent;
+    }
+  }
+
+
+  // sizing
+  .slider {
+    border-radius: 100px;
+    margin: $_slider_margin;
+  }
+
+  &.fine-tune .slider { margin: $_slider_fine_tune_margin; }
+
+  &.vertical {
+
+    .slider {
+      margin-left: 1px + $_slider_margin;
+
+      &:dir(rtl) {
+        margin-left: $_slider_margin;
+        margin-right: 1px + $_slider_margin;
+      }
+    }
+
+    &.fine-tune .slider {
+      margin-left: 1px + $_slider_fine_tune_margin;
+
+      &:dir(rtl) {
+        margin-left: $_slider_fine_tune_margin;
+        margin-right: 1px + $_slider_fine_tune_margin;
+      }
+    }
+
+    .trough {
+      border-left-style: solid;
+
+      &:dir(rtl) {
+        border-left-style: none;
+        border-right-style: solid;
+      }
+    }
+  }
+
+  &.horizontal {
+
+    .slider { margin-top: 1px + $_slider_margin; }
+
+    &.fine-tune .slider { margin-top: 1px + $_slider_fine_tune_margin; }
+
+    .trough { border-top-style: solid; }
+  }
+}
+
+.scrollbars-junction,
+.scrollbars-junction.frame { // the small square between two scrollbars
+  border-color: transparent;
+  // the border image is used to add the missing dot between the borders, details, details, details...
+  border-image: linear-gradient(to bottom, $borders_color 1px, transparent 1px) 0 0 0 1 / 0 1px stretch;
+  background-color: $scrollbar_bg_color;
+
+  &:dir(rtl) { border-image-slice: 0 1 0 0; }
+
+  &:backdrop {
+    border-image-source: linear-gradient(to bottom, $backdrop_borders_color 1px, transparent 1px);
+    background-color: $backdrop_scrollbar_bg_color;
+  }
+}
+
+
+/**********
+ * Switch *
+ **********/
+
+GtkSwitch {
+  -GtkSwitch-slider-width: 45px; // 55px is the right value to make it as tall
+                                 // as buttons, not doing that for now
+  font-weight: bold;
+  font-size: smaller;
+  outline-offset: -4px;
+  box-shadow: inset 0 1px transparentize(black, 0.9), // needs to be set here
+              _widget_edge();                         // otherwise it gets
+                                                      // clipped
+  &.trough {
+    // similar to the .scale
+    border: 1px solid $borders_color;
+    border-radius: 3px;
+    color: $fg_color;
+    background-image: linear-gradient(to bottom, mix($bg_color, $borders_color, 60%));
+    text-shadow: 0 1px transparentize(black, 0.9);
+    &:active {
+      @include progressbar_fill;
+      color: white;
+      border-color: $selected_borders_color;
+      box-shadow: _widget_edge();
+      text-shadow: 0 1px transparentize($selected_borders_color, 0.5),
+                   0 0 2px transparentize(white, 0.4);
+    }
+    &:insensitive {
+      color: $insensitive_fg_color;
+      border-color: $borders_color;
+      background-image: none;
+      background-color: $insensitive_bg_color;
+      box-shadow: _widget_edge();
+      text-shadow: none;
+    }
+    &:backdrop {
+      color: $backdrop_fg_color;
+      border-color: $backdrop_borders_color;
+      background-image: linear-gradient(to bottom, $backdrop_dark_fill);
+      box-shadow: none;
+      text-shadow: none;
+      &:active {
+        @if $variant == 'light' { color: $backdrop_bg_color; }
+        border-color: if($variant == 'light', $selected_bg_color,
+                                              $selected_borders_color);
+        background-image: linear-gradient(to bottom, $selected_bg_color);
+        box-shadow: none;
+      }
+      &:insensitive {
+        color: $backdrop_insensitive_color;
+        border-color: $backdrop_borders_color;
+        background-image: none;
+        background-color: $insensitive_bg_color;
+      }
+    }
+  }
+  &.slider {
+    border: 1px solid;
+    border-radius: 3px;
+    @include button(normal);
+    box-shadow: inset 0 1px if($variant=='light', white,
+                               transparentize(white, 0.85)),
+                inset 0 -2px transparentize($bg_color, 0.4),
+                inset 0 -1px mix($bg_color, $borders_color, 50%);
+    &:hover {
+      @include button(hover);
+      box-shadow: inset 0 1px if($variant=='light', white,
+                                 transparentize(white, 0.85)),
+                  inset 0 -2px transparentize($bg_color, 0.4),
+                  inset 0 -1px mix($bg_color, $borders_color, 50%);
+    }
+    &:active { border: 1px solid $selected_borders_color; }
+    &:insensitive { @include button(insensitive, $edge:none); }
+    &:backdrop {
+      @include button(backdrop);
+      box-shadow: none;
+      &:active{
+        border-color: if($variant == 'light', $selected_bg_color,
+                                              $selected_borders_color);
+      }
+      &:insensitive {
+        @include button(backdrop-insensitive);
+        box-shadow: none;
+      }
+    }
+  }
+  .list-row:selected & {
+    @if $variant == 'light' {
+      box-shadow: none;
+      border-color: $selected_borders_color;
+      &:backdrop { border-color: $selected_borders_color; }
+      &.slider:dir(rtl) { border-left-color: $borders_color; }
+      &.slider:dir(ltr) { border-right-color: $borders_color; }
+      &.slider,
+      &.slider:active { border-color: $selected_borders_color; }
+    }
+  }
+
+}
+
+/*************************
+ * Check and Radio items *
+ *************************/
+
+// draw regular check and radio items using our PNG assets
+// all assets are rendered from assets.svg. never add pngs directly
+
+$asset_suffix: if($variant=='dark', '-dark', '');
+@each $w,$a in ('check', 'checkbox'),
+               ('radio','radio') {
+
+  //standard checks and radios
+  @each $s,$as in ('','-unchecked'),
+                  (':hover', '-unchecked-hover'),
+                  (':active', '-unchecked-active'),
+                  (':insensitive','-unchecked-insensitive'),
+                  (':backdrop', '-unchecked-backdrop'),
+                  (':backdrop:insensitive', '-unchecked-backdrop-insensitive'),
+                  (':inconsistent', '-mixed'),
+                  (':inconsistent:hover', '-mixed-hover'),
+                  (':inconsistent:selected', '-mixed-active'),
+                  (':inconsistent:backdrop', '-mixed-backdrop'),
+                  (':inconsistent:insensitive', '-mixed-insensitive'),
+                  (':inconsistent:insensitive:backdrop', '-mixed-backdrop-insensitive'),
+                  (':checked', '-checked'),
+                  (':checked:insensitive','-checked-insensitive'),
+                  (':checked:hover', '-checked-hover'),
+                  (':checked:active', '-checked-active'),
+                  (':backdrop:checked', '-checked-backdrop'),
+                  (':backdrop:checked:insensitive', '-checked-backdrop-insensitive') {
+    .#{$w}#{$s} {
+      -gtk-icon-source: -gtk-scaled(url("assets/#{$a}#{$as}#{$asset_suffix}.png"),
+                                    url("assets/#{$a}#{$as}#{$asset_suffix}@2.png"));
+      icon-shadow: if(str-index($s,"backdrop"), none, 0 1px 0 $borders_edge); //no edge highlight for :backdrop
+      &.button.flat { icon-shadow: none; }
+    }
+    @if $variant == 'light' {
+      // the borders of the light variant versions of checks and radios are
+      // too similar in luminosity to the selected background color, hence
+      // we need special casing.
+      .view.#{$w}#{$s}:selected,
+      .list-row:selected .#{$w}#{$s} {
+        -gtk-icon-source: -gtk-scaled(url("assets/selected-#{$a}#{$as}#{$asset_suffix}.png"),
+                                      url("assets/selected-#{$a}#{$as}#{$asset_suffix}@2.png"));
+      }
+    }
+  }
+
+  //menu
+  .menu .menuitem.#{$w} {
+    -gtk-icon-source: -gtk-icontheme('#{$a}-symbolic');
+    color: mix($fg_color, $bg_color, 60%);
+    icon-shadow: none;
+    &:active, &:checked {
+      -gtk-icon-source: -gtk-icontheme('#{$a}-checked-symbolic');
+    }
+    &:inconsistent {
+      -gtk-icon-source: -gtk-icontheme('#{$a}-mixed-symbolic');
+    }
+    &:hover { color: $selected_fg_color; }
+    &:insensitive { color: mix($insensitive_fg_color, $bg_color, 50%); }
+  }
+}
+
+//treeview and list-rows
+.view.check, .view.radio,
+.list-row .check, list-row .radio {
+  icon-shadow: none;
+  &:selected, &:hover { icon-shadow: none; }
+}
+
+//content view (grid/list)
+
+.content-view {
+  background-color: darken($bg_color,7%);
+  &:backdrop { background-color: darken($bg_color,7%); }
+  &.rubberband { @extend .rubberband; }
+}
+
+//selection-mode
+@each $s,$as in ('','-selectionmode'),
+                  (':hover', '-hover-selectionmode'),
+                  (':active', '-active-selectionmode'),
+                  (':backdrop', '-backdrop-selectionmode'),
+                  (':checked', '-checked-selectionmode'),
+                  (':checked:hover', '-checked-hover-selectionmode'),
+                  (':checked:active', '-checked-active-selectionmode'),
+                  (':backdrop:checked', '-checked-backdrop-selectionmode') {
+  .view.content-view.check#{$s} {
+    icon-shadow: none;
+    -gtk-icon-source: -gtk-scaled(url("assets/checkbox#{$as}.png"),
+                                    url("assets/checkbox#{$as}@2.png"));
+    background-color: transparent;
+  }
+}
+
+GtkCheckButton.text-button, GtkRadioButton.text-button {
+  // this is for a nice focus on check and radios text
+  padding: 1px 2px 4px;
+  outline-offset: 0;
+  &:insensitive,
+  &:insensitive:active,
+  &:insensitive:inconsistent {
+    // set insensitive color, which is overriden otherwise
+    color: $insensitive_fg_color;
+    &:backdrop { color: $backdrop_insensitive_color; }
+  }
+}
+
+/************
+ * GtkScale *
+ ************/
+.scale,
+.scale.scale-has-marks-above.scale-has-marks-below,
+.scale.vertical.scale-has-marks-above.scale-has-marks-below {
+  // FIXME: rationalize
+  -GtkScale-slider-length: 20;
+  -GtkRange-slider-width: 20;
+  -GtkRange-trough-border: 2;
+  outline-offset: -9px;
+  outline-radius: 4px;
+
+  &.fine-tune {
+    outline-offset: -7px;
+    outline-radius: 6px;
+    &.trough {
+      margin: 8px;
+      border-radius: 4px;
+    }
+  }
+
+  &.slider {
+    //FIXME: better gradient on the slider and hover state
+    @include button(normal);
+    border: 1px solid;
+    border-radius: 50%;
+    border-color: darken($borders_color,3%);
+    box-shadow: inset 0 1px if($variant=='light', white,
+                               transparentize(white,0.85)),
+                inset 0 #{-2px} $bg_color,
+                inset 0 #{-1px} mix($bg_color, $borders_color, 50%);
+    &:hover {
+      @include button(hover);
+      border-color: darken($borders_color,3%);
+      border-radius: 50%; // needed for double marks scales
+      box-shadow: inset 0 1px if($variant=='light', white,
+                                 transparentize(white, 0.85)),
+                  inset 0 #{-2px} if($variant=='light', white,
+                                     transparentize(white, 0.86)),
+                  inset 0 #{-1px} mix($bg_color, $borders_color, 70%);
+    }
+    &:insensitive {
+      border-style: solid; // needed for double marks scales or they'll get
+      border-radius: 50%;  // overridden
+      background-image: linear-gradient(to bottom, $insensitive_bg_color);
+      box-shadow: none;
+    }
+    &:backdrop {
+      border-style: solid; // needed for double marks scales or they'll get
+      border-radius: 50%;  // overridden
+      border-color: darken($backdrop_borders_color,3%);
+      background-image: linear-gradient(to bottom, $backdrop_bg_color);
+      box-shadow: none;
+    }
+    &:backdrop:insensitive {
+      @include button(backdrop-insensitive);
+    }
+    &:active {
+      border: 1px solid if($variant=='light',darken($selected_borders_color,3%),
+                           darken($selected_bg_color,15%));
+    }
+    //OSD sliders
+    .osd & {
+      @include button(osd);
+      background-color: opacify($osd_bg_color, 1);
+      &:hover { @include button(osd-hover); }
+      &:active { @include button(osd-active); }
+      &:backdrop { @include button(osd-backdrop); }
+    }
+  }
+  &.trough {
+    margin: 10px;
+    border: 1px solid $borders_color;
+    border-radius: 3px;
+    background-color: mix($bg_color, $borders_color, 60%);
+    box-shadow: inset 1px 1px transparentize(black, 0.9),
+                _widget_edge();
+    &.highlight {
+      @include progressbar_fill;
+      border-color: $selected_borders_color;
+      box-shadow: _widget_edge();
+      &.vertical { @include progressbar_fill(vertical); }
+      &:backdrop {
+         border-color: if($variant=='light', $selected_bg_color,
+                                             $selected_borders_color);
+         background-color: $selected_bg_color;
+         box-shadow: none;
+      }
+    }
+    &:insensitive, &.vertical:insensitive {
+      border-color: $insensitive_borders_color;
+      background-image: none;
+      background-color: $insensitive_bg_color;
+      box-shadow: _widget_edge();
+    }
+    &:backdrop {
+      border-color: $backdrop_borders_color;
+      background-color: mix($backdrop_bg_color, $borders_color, 50%);
+      box-shadow: none;
+    }
+    &:backdrop:insensitive, .highlight:backdrop:insensitive {
+      border-color: $backdrop_borders_color;
+      background-color: $insensitive_bg_color;
+    }
+    //OSD troughs
+    .osd & {
+      border-color: $osd_borders_color;
+      box-shadow: none;
+      margin: 9px;
+      &.fine-tune { margin: 7px; }
+      background-color: transparentize($osd_borders_color, 0.2);
+      outline-color: transparentize($osd_fg_color, 0.8);
+      outline-offset: -8px;
+      &.highlight {
+        background-image: none;
+        background-color: $selected_bg_color;
+      }
+      &:insensitive, &:backdrop:insensitive {
+        border-color: transparent;
+        background-color: transparent;
+      }
+      &:backdrop {
+        border-color: $osd_borders_color;
+        background-image: none;
+      }
+    }
+  }
+}
+
+$asset_suffix: if($variant=='dark', '-dark', '');
+@each $d,$dn in ('', 'horz'),
+                ('.vertical', 'vert') {
+  @each $w,$we in  ('scale-has-marks-below','scale_marks_below'),
+                   ('scale-has-marks-above','scale_marks_above') {
+    .scale#{$d}.#{$w} {
+      -GtkScale-slider-length: 20;
+      -GtkRange-slider-width: 24;
+      -GtkRange-trough-border: 2;
+
+      @extend %#{$we}_#{$dn};
+
+      @each $s,$as in ('',''),
+                      (':hover','-hover'),
+                      (':active','-active'),
+                      (':insensitive','-insensitive'),
+                      (':backdrop','-backdrop'),
+                      (':backdrop:insensitive','-backdrop-insensitive') {
+        &.slider#{$s} {
+          $_url: 'assets/slider-#{$dn}-#{$w}#{$as}#{$asset_suffix}';
+          border-style: none;
+          border-radius: 0;
+          background-color: transparent;
+          background-image: -gtk-scaled(url('#{$_url}.png'),
+                            url('#{$_url}@2.png'));
+          background-repeat: no-repeat;
+          background-position: center;
+          box-shadow: none;
+        }
+      }
+    }
+  }
+}
+
+%scale_marks_above_horz {
+  .trough { margin: 14px 10px 10px; }
+  &.fine-tune .trough { margin: 12px 8px 8px; }
+}
+%scale_marks_below_horz {
+ .trough { margin: 10px 10px 14px; }
+  &.fine-tune .trough { margin: 8px 8px 12px; }
+}
+%scale_marks_above_vert {
+  .trough { margin: 10px 10px 10px 14px; }
+  &.fine-tune .trough { margin: 8px 8px 8px 12px; }
+}
+%scale_marks_below_vert {
+  .trough { margin: 10px 14px 10px 10px; }
+  &.fine-tune .trough { margin: 8px 12px 8px 8px; }
+}
+
+/*****************
+ * Progress bars *
+ *****************/
+
+GtkProgressBar {
+  padding: 0;
+  font-size: smaller;
+  color: transparentize($fg_color, 0.6);
+  box-shadow: inset 1px 1px transparentize(black, 0.9), // needs to be set
+              _widget_edge();                           // here ot it gets
+                                                        // clipped
+  &:backdrop {
+    color: $backdrop_insensitive_color;
+  }
+  &.osd {
+    -GtkProgressBar-xspacing: 0;
+    -GtkProgressBar-yspacing: 0;
+    -GtkProgressBar-min-horizontal-bar-height: 3;
+  }
+  &.trough {  // background
+    border: 1px solid $borders_color;
+    border-radius: 3px;
+    background-color: mix($borders_color, $bg_color, 35%);
+    &:backdrop{
+      border-color: $backdrop_borders_color;
+      background-color: $backdrop_dark_fill;
+      box-shadow: 0 1px transparentize(white,1);
+    }
+    &.osd {
+      border-style: none;
+      background-color: transparent;
+      box-shadow: none;
+    }
+  }
+}
+
+// moving bit
+.progressbar {
+  @include progressbar_fill;
+  border: 1px solid $selected_borders_color;
+  border-radius: 1.5px;
+  box-shadow: none; //needed for clipping
+  &.left {
+    border-top-left-radius: 3px;
+    border-bottom-left-radius: 3px;
+  }
+  &.right {
+    border-top-right-radius: 3px;
+    border-bottom-right-radius: 3px;
+  }
+  &.left.right {
+    box-shadow: none;
+  }
+  &.vertical {
+    @include progressbar_fill(vertical);
+    &.bottom {
+      border-bottom-left-radius: 3px;
+      border-bottom-right-radius: 3px;
+      box-shadow: none;
+    }
+    &.top {
+      border-top-left-radius: 3px;
+      border-top-right-radius: 3px;
+    }
+  }
+  &:backdrop {
+    border-color: if($variant=='light', $selected_bg_color,
+                                        $selected_borders_color);
+    background-image: none;
+    background-color: $selected_bg_color;
+    box-shadow: none;
+  }
+  &.osd {
+    background-image: none;
+    background-color: $selected_bg_color;
+    border-style: none;
+    border-radius: 0;
+  }
+}
+
+
+/*************
+ * Level Bar *
+ *************/
+
+.level-bar.vertical {
+  -GtkLevelBar-min-block-width: 3;
+  -GtkLevelBar-min-block-height: 34;
+}
+
+.level-bar {
+  box-shadow: _widget_edge(); // needs to be set here to avoid clipping
+  -GtkLevelBar-min-block-width: 34;
+  -GtkLevelBar-min-block-height: 3;
+  &.vertical {
+    -GtkLevelBar-min-block-width: 3;
+    -GtkLevelBar-min-block-height: 34;
+  }
+  &.trough {
+    border: 1px solid;
+    padding: 2px;
+    border-radius: 3px;
+    @include entry(normal);
+    &:backdrop {
+      @include entry(backdrop);
+    }
+  }
+  &.fill-block {
+    // FIXME: it would be nice to set make fill blocks bigger, but we'd need
+    // :nth-child working on discrete indicators
+    border: 1px solid if($variant=='light', darken($selected_bg_color,10%),
+                                            darken($selected_bg_color,5%));
+    background-color: $selected_bg_color;
+    box-shadow: 0 1px transparentize(black, 0.9);
+    border-radius: 1px;
+    &:backdrop {
+      border-color: $selected_bg_color;
+      box-shadow: none;
+    }
+    &.indicator-discrete {
+      &.horizontal { margin: 0 1px; }
+      &.vertical { margin: 1px 0; }
+    }
+    &.level-high {
+      border-color: darken($success_color,10%);
+      background-color: $success_color;
+      &:backdrop { border-color: $success_color; }
+    }
+    &.level-low {
+      border-color: darken($warning_color,10%);
+      background-color: $warning_color;
+      &:backdrop { border-color: $warning_color; };
+    }
+    &.empty-fill-block {
+      background-color: transparent;
+      border-color: if($variant=='light', transparentize($fg_color,0.8),
+                       transparentize($fg_color,0.9));
+      box-shadow: none;
+      &:backdrop { border-color: transparentize($backdrop_fg_color,0.85); }
+    }
+  }
+}
+
+
+/**********
+ * Frames *
+ **********/
+.frame {
+  border: 1px solid $borders_color;
+  &.flat { border-style: none; }
+  &:backdrop { border-color: $backdrop_borders_color; }
+  padding: 0;
+  &.action-bar {
+    padding: 6px;
+    border-width: 1px 0 0;
+  }
+}
+
+GtkScrolledWindow {
+  GtkViewport.frame { // avoid double borders when viewport inside
+                      // scrolled window
+    border-style: none;
+  }
+}
+
+//vbox and hbox separators
+.separator {
+  // always disable separators
+  // -GtkWidget-wide-separators: true;
+  color: transparentize(black, 0.9);
+
+  // Font and File button separators
+  GtkFileChooserButton &.vertical,
+  GtkFontButton &.vertical {
+    // always disable separators
+    -GtkWidget-wide-separators: true;
+  }
+}
+
+/*********
+ * Lists *
+ *********/
+
+.list, .list-row {
+  background-color: $base_color;
+  border-color: $borders_color;
+  &:backdrop {
+    background-color: $backdrop_base_color;
+    border-color: $backdrop_borders_color;
+  }
+}
+
+.list-row,
+.grid-child {
+  padding: 2px;
+}
+
+.list-row.button,
+.list-row.button:backdrop,
+.list-row.button:backdrop:active,
+.list-row.button:backdrop:checked,
+.list-row.button:backdrop:insensitive,
+.list-row.button:backdrop:insensitive:active,
+.list-row.button:backdrop:insensitive:checked,
+.list-row.button:insensitive:active,
+.list-row.button:insensitive:checked {
+  // reset button inherited stuff
+  @extend %undecorated_button;
+  background-color: transparentize($base_color,1); // for the transition
+  border-style: none; // I need no borders here
+  border-radius: 0;   // and no rounded corners
+  box-shadow: none;   // and no box-shadow
+
+}
+
+.list-row.button {
+  // let's take care of background colors
+  &:hover {
+    background-color: mix($fg_color, $base_color, 5%);
+  }
+  &:active {
+    box-shadow: inset 0 2px 2px -2px transparentize(black, 0.8);
+  }
+  &:backdrop:hover { background-color: transparent; }
+  &:selected {
+    &:active { box-shadow: inset 0 2px 3px -1px transparentize(black, 0.5); }
+    &:hover {
+      background-color: mix($fg_color, $selected_bg_color, 10%);
+    }
+    &:backdrop { background-color: $selected_bg_color; }
+  }
+}
+
+.list-row:selected {
+  @extend %selected_items;
+  .button {
+    @include button(normal, $edge:none);
+    @if $variant == 'light' { border-color: $selected_borders_color; }
+    &.flat {
+      @include button(undecorated, $edge:none);
+      color: $selected_fg_color;
+    }
+    &:hover {
+      @include button(hover, $edge:none);
+      @if $variant == 'light' { border-color: $selected_borders_color; }
+    }
+    &:active, &:checked {
+      @include button(active, $edge:none);
+      @if $variant == 'light' { border-color: $selected_borders_color; }
+    }
+    &:backdrop, &.flat:backdrop {
+      @include button(backdrop, $edge:none);
+      @if $variant == 'light' { border-color: $selected_borders_color; }
+      &:active, &:checked {
+        @include button(backdrop-active, $edge:none);
+        @if $variant == 'light' { border-color: $selected_borders_color; }
+      }
+      &:insensitive {
+        @include button(backdrop-insensitive, $edge:none);
+        @if $variant == 'light' { border-color: $selected_borders_color; }
+        &:active, &:checked {
+          @include button(backdrop-insensitive-active, $edge:none);
+          @if $variant == 'light' { border-color: $selected_borders_color; }
+        }
+      }
+    }
+    &.flat:backdrop {
+      @include button(undecorated);
+      color: if($variant=='light', $backdrop_base_color, $backdrop_fg_color);
+    }
+    &:insensitive {
+      @include button(insensitive, $edge:none);
+      @if $variant == 'light' { border-color: $selected_borders_color; }
+      &:active, &:checked { @include button(insensitive-active, $edge:none); }
+    }
+    //FIXME: make placeholder with buttons w/o edge to be extended around
+    //       istead of repeating everytime this stuff.
+  }
+}
+
+// transition
+.list-row, list-row.button {
+  transition: all 300ms $ease-out-quad;
+  &:hover { transition: none; }
+}
+
+
+/*********************
+ * App Notifications *
+ *********************/
+
+.app-notification,
+.app-notification.frame {
+  @extend %osd;
+  padding: 10px;
+  border: none;
+  border-radius: 0 0 6px 6px;
+  background-color: $osd_bg_color;
+  background-image: linear-gradient(to bottom, transparentize(black, 0.8),
+                                               transparent 2px);
+  background-clip: padding-box;
+  &:backdrop { background-image: none; }
+  .button {
+    @include button(osd);
+    &.flat {
+      @extend %undecorated_button;
+      icon-shadow: 0 1px black;
+      text-shadow: 0 1px black;
+      &:backdrop,
+      &:insensitive,
+      &:backdrop:insensitive { @extend %undecorated_button; }
+    }
+    &:hover { @include button(osd-hover); }
+    &:active,
+    &:checked,
+    &:backdrop:active,
+    &:backdrop:checked {
+      @include button(osd-active);
+    }
+    &:insensitive,
+    &:backdrop:insensitive {
+      @include button(osd-insensitive);
+    }
+    &:backdrop { @include button(osd-backdrop); }
+  }
+}
+
+/*************
+ * Expanders *
+ *************/
+
+.expander {
+  -gtk-icon-source: -gtk-icontheme('pan-end-symbolic');
+  &:dir(rtl) { -gtk-icon-source: -gtk-icontheme('pan-end-symbolic-rtl'); }
+  &:hover { color: lighten($fg_color,30%); } //only lightens the arrow
+  &:checked { -gtk-icon-source: -gtk-icontheme('pan-down-symbolic'); }
+}
+
+/************
+ * Calendar *
+ ***********/
+GtkCalendar {
+  color: $text_color;
+  border: 1px solid $borders_color;
+
+  &:selected {
+    @extend .view:selected;
+  }
+
+  &.header {
+    border: 1px solid transparentize(black, 0.9);
+    border-radius: 0;
+
+    &:backdrop { border-color: transparentize(black, 0.9); }
+  }
+
+  &.button {
+    @extend %undecorated_button;
+    color: transparentize($fg_color, 0.55);
+
+    &:hover {
+      @extend %undecorated_button;
+      color: $fg_color;
+    }
+
+    &:backdrop {
+      @extend %undecorated_button;
+      color: transparentize($backdrop_fg_color,0.55);
+    }
+  }
+
+  &:inconsistent, &:inconsistent:backdrop,
+  &.highlight, &.highlight:backdrop { color: gtkalpha(currentColor, 0.55); }
+
+
+  &:backdrop {
+    color: $backdrop_text_color;
+    border-color: $backdrop_borders_color;
+  }
+}
+
+/***********
+ * Dialogs *
+ ***********/
+
+.message-dialog .dialog-action-area .button {
+  padding: 8px;
+}
+
+.message-dialog { // Message Dialog styling
+  -GtkDialog-button-spacing: 0;
+
+  @if $variant==light {
+    // the bright variant as a slightly darker bg which in this case clashes with the window decoration, overriding
+    &.background { background-color: $bg_color; }
+  }
+
+  .titlebar {
+    border-style: none;
+    box-shadow: inset 0 1px $borders_edge;
+  }
+  &.csd { // rounded bottom border styling for csd version
+    &.background {
+      // bigger radius for better antialiasing
+      border-bottom-left-radius: 9px;
+      border-bottom-right-radius: 9px;
+    }
+    .dialog-action-area .button {
+      padding: 12px;
+      border-radius: 0;
+      @include button(normal, $edge:none);
+      @extend %middle_button;
+      &:hover {
+        @include button(hover, $edge:none);
+        @extend %middle_button;
+      }
+      &:active {
+        @include button(active, $edge:none);
+        @extend %middle_button;
+      }
+      &:insensitive {
+        @include button(insensitive, $edge:none);
+        @extend %middle_button;
+      }
+      &:backdrop {
+        @include button(backdrop, $edge:none);
+        @extend %middle_button;
+      }
+      &:backdrop:insensitive {
+        @include button(backdrop-insensitive, $edge:none);
+        @extend %middle_button;
+      }
+      @each $b_type, $b_color in (suggested-action, $selected_bg_color),
+                                 (destructive-action, $destructive_color) {
+        &.#{$b_type} {
+          @include button(normal, $b_color, white, $edge:none);
+          @extend %middle_button;
+          &:hover {
+            @include button(hover, $b_color, white, $edge:none);
+            @extend %middle_button;
+          }
+          &:active {
+            @include button(active, $b_color, white, $edge:none);
+            @extend %middle_button;
+          }
+          &:backdrop {
+            @include button(backdrop, $b_color, white, $edge:none);
+            @extend %middle_button;
+            &:insensitive {
+              @include button(backdrop-insensitive, $edge:none);
+              @extend %middle_button;
+            }
+          }
+          &:insensitive {
+            @include button(insensitive, $edge:none);
+            @extend %middle_button;
+          }
+        }
+      }
+      &:first-child{ @extend %first_button; }
+      &:last-child { @extend %last_button; }
+    }
+    %middle_button {
+      border-left-style: solid;
+      border-right-style: none;
+      border-bottom-style: none;
+    }
+    %last_button {
+      border-bottom-right-radius: 7px;
+      outline-bottom-right-radius: 5px;
+    }
+    %first_button {
+      border-left-style: none;
+      border-bottom-left-radius: 7px;
+      outline-bottom-left-radius: 5px;
+    }
+  }
+}
+
+GtkFileChooserDialog {
+  .search-bar {
+    background-color: $base_color;
+    border-color: $bg_color;
+    box-shadow: none;
+    &:backdrop {
+      background-color: $backdrop_base_color;
+      border-color: $backdrop_bg_color;
+    }
+  }
+  .dialog-action-box {
+    border-top: 1px solid $borders_color;
+    &:backdrop { border-top-color: $backdrop_borders_color; }
+  }
+}
+
+/***********
+ * Sidebar *
+ ***********/
+
+.sidebar {
+  border: none;
+  background-color: $sidebar_bg_color;
+
+  &:backdrop {
+    background-color: $backdrop_sidebar_bg_color;
+  }
+
+  &:selected {
+    @extend %selected_items;
+  }
+}
+
+// Places sidebar is a special case, since the view here have to look like chrome not content, so we override text color
+GtkPlacesSidebar.sidebar .view {
+
+  color: $fg_color;
+  background-color: transparent;
+
+  .separator,
+  .separator:backdrop { @extend .separator; }
+
+  .image { // icons color
+    color: mix($fg_color, $sidebar_bg_color, 70%);
+
+    &:selected {
+      color: mix($selected_fg_color, $selected_bg_color, 90%);
+
+      &:backdrop { color: mix($backdrop_selected_fg_color, $selected_bg_color, 90%); }
+    }
+
+    &:insensitive { color: mix($insensitive_fg_color, $sidebar_bg_color, 70%); }
+
+    &:backdrop {
+      color: mix($backdrop_fg_color, $sidebar_bg_color, 70%);
+
+      &:insensitive { color: mix($backdrop_insensitive_color, $sidebar_bg_color, 70%); }
+    }
+  }
+
+  &:insensitive { color: $insensitive_fg_color; }
+
+  &:backdrop {
+    color: $backdrop_fg_color;
+
+    &:insensitive { color: $backdrop_insensitive_color; }
+  }
+
+  &:selected {
+    @extend %selected_items;
+  }
+}
+
+
+.sidebar-item {
+  padding: 10px 4px;
+  > .label {
+    padding-left: 6px;
+    padding-right: 6px;
+  }
+  &.needs-attention > .label {
+    @extend %needs_attention;
+    background-size: 6px 6px, 0 0;
+  }
+}
+
+
+/*********
+ * Paned *
+ *********/
+
+GtkPaned { // this is for the standard paned separator
+
+  -GtkPaned-handle-size: 1; // sets separator width
+
+  -gtk-icon-source: none; // removes handle decoration
+  margin: 0 8px 8px 0; // drag area of the separator, not a real margin
+  &:dir(rtl) {
+    margin-right: 0;
+    margin-left: 8px;
+  }
+  .pane-separator {
+    background-color: $borders_color;
+    &:backdrop {
+      background-color: $backdrop_borders_color;
+    }
+  }
+}
+
+GtkPaned.wide { // this is for the paned with wide separator
+  -GtkPaned-handle-size: 5; // wider separator here
+  margin: 0; // no need of the invisible drag area so, reset margin
+  .pane-separator {
+    background-color: transparent;
+    border-style: none solid;
+    border-color: $borders_color;
+    border-width: 1px;
+  }
+  &.vertical .pane-separator { border-style: solid none;}
+  .pane-separator:backdrop { border-color: $backdrop_borders_color; }
+}
+
+
+/**************
+ * GtkInfoBar *
+ **************/
+GtkInfoBar {
+  border-style: none;
+}
+
+.info,
+.question,
+.warning,
+.error {
+  background-color: $selected_bg_color;
+  color: $selected_fg_color;
+  text-shadow: 0 1px darken($selected_bg_color, 10%);
+  border-color: darken($selected_bg_color, 10%);
+  .button {
+    // FIXME: extend selection mode buttons
+    @include button(normal, $selected_bg_color, $selected_fg_color, none);
+    &:hover {
+      @include button(hover, $selected_bg_color, $selected_fg_color, none); }
+    &:active {
+      @include button(active, $selected_bg_color, $selected_fg_color, none); }
+    &:insensitive {
+      @include button(insensitive,$selected_bg_color,$selected_fg_color,none); }
+    &:backdrop {
+      @include button(backdrop, $selected_bg_color, $selected_fg_color, none);
+      border-color: _border_color($selected_bg_color);
+      &:insensitive {
+        @include button(backdrop-insensitive, $selected_bg_color,
+                        $selected_fg_color, none);
+        border-color: _border_color($selected_bg_color);
+      }
+    }
+  }
+  .label:selected,
+  .label:selected:focus,
+  .label:selected:hover {
+    background-color: darken($selected_bg_color, 10%);
+  }
+}
+
+/************
+ * Tooltips *
+ ************/
+
+.tooltip {
+  &.background {
+    // background-color needs to be set this way otherwise it gets drawn twice
+    // see https://bugzilla.gnome.org/show_bug.cgi?id=736155 for details.
+    background-color: transparentize(black, 0.2);
+    background-clip: padding-box;
+    border: 1px solid $tooltip_borders_color; // this suble border is meant to
+                                              // not make the tooltip melt with
+                                              // very dark backgrounds
+  }
+
+  color: white;
+  padding: 4px; /* not working */
+  border-radius: 5px;
+  box-shadow: none; // otherwise it gets inherited by windowframe.csd
+  text-shadow: 0 1px black;
+  // FIXME: we need a border or tooltips vanish on black background.
+  &.window-frame.csd {
+    background-color: transparent;
+  }
+}
+
+.tooltip * { //Yeah this is ugly
+  padding: 4px;
+  background-color: transparent;
+  color: inherit; // just to be sure
+}
+
+/*****************
+ * Color Chooser *
+ *****************/
+
+GtkColorSwatch {
+  // This widget is made of two boxes one on top of the other, the lower box is GtkColorSwatch {} the other one
+  // is GtkColorSwatch > .overlay {}, GtkColorSwatch has the programmatically set background, so most of the style
+  // is applied to the overlay box.
+
+  $_colorswatch_shadow: inset 0 1px transparentize(black, 0.9), _widget_edge();
+
+  $_colorswatch_radius: 5px;
+
+  box-shadow: $_colorswatch_shadow;
+
+  // take care of colorswatches on selected elements
+  :selected & {
+    box-shadow: none;
+    &.overlay, &.overlay:hover {
+      border-color: $selected_fg_color;
+    }
+  }
+
+  // we need to re-set the shadow here since it get axed by the previous bit
+  &:selected { box-shadow: $_colorswatch_shadow; }
+
+  // base color corners rounding
+  // to avoid the artifacts caused by rounded corner anti-aliasing the base color
+  // sports a bigger radius.
+  // nth-child is needed by the custom color strip.
+  // The :not() madness is needed since actually the overlay is selectable by GtkColorSwatch > .overlay
+  // and GtkColorSwatch.overlay, I know it's weird, but this is gtk+, not a browser.
+  &.top {
+    border-top-left-radius: $_colorswatch-radius + 1px;
+    border-top-right-radius: $_colorswatch-radius + 1px;
+  }
+  &.bottom {
+    border-bottom-left-radius: $_colorswatch-radius + 1px;
+    border-bottom-right-radius: $_colorswatch-radius + 1px;
+  }
+  &.left, &:first-child:not(.overlay):not(.top) {
+    border-top-left-radius: $_colorswatch-radius + 1px;
+    border-bottom-left-radius: $_colorswatch-radius + 1px;
+  }
+  &.right, &:last-child:not(.overlay):not(.bottom) {
+    border-top-right-radius: $_colorswatch-radius + 1px;
+    border-bottom-right-radius: $_colorswatch-radius + 1px;
+  }
+  &:only-child:not(.overlay) { border-radius: $_colorswatch-radius + 1px; }
+
+  // overlay corner rounding
+  &.top > .overlay {
+    border-top-left-radius: $_colorswatch-radius;
+    border-top-right-radius: $_colorswatch-radius;
+  }
+  &.bottom > .overlay {
+    border-bottom-left-radius: $_colorswatch-radius;
+    border-bottom-right-radius: $_colorswatch-radius;
+  }
+  &:first-child:not(.top) > .overlay {
+    border-top-left-radius: $_colorswatch-radius;
+    border-bottom-left-radius: $_colorswatch-radius;
+  }
+  &:last-child:not(.bottom) > .overlay {
+    border-top-right-radius: $_colorswatch-radius;
+    border-bottom-right-radius: $_colorswatch-radius;
+  }
+  &:only-child > .overlay { border-radius: $_colorswatch-radius; }
+
+  // hover effect
+  &:hover,
+  &:hover:selected {
+    background-image: linear-gradient(135deg, transparentize(white, 0.3),
+                                              transparentize(white, 1) 50%);
+    box-shadow: inset 0 1px transparentize(white, 0.6),
+                inset 0 -1px if($variant == 'light', transparentize(black, 0.9), transparentize(black, 0.6));
+    &.color-dark { // swatches with colors with luminosity lower than 50% get the color-dark class
+      background-image: linear-gradient(135deg, transparentize(white, 0.5),
+                                                transparentize(white, 1) 50%);
+    }
+  }
+  &:backdrop,
+  &:backdrop:selected
+  &.color-dark:backdrop,
+  &.color-dark:backdrop:selected {
+    background-image: none;
+    box-shadow: none;
+  }
+
+  // no hover effect for the colorswatch in the color editor
+  GtkColorEditor & {
+    border-radius: 3px; // same radius as the entry
+    &:hover {
+      background-image: none;
+      box-shadow: inset 0 1px transparentize(black, 0.9), _widget_edge();
+    }
+    &:backdrop { box-shadow: none; }
+  }
+
+  // indicator and keynav outline colors
+  &.color-dark {
+    color: white;
+    outline-color: transparentize(black, 0.7);
+    &:backdrop { color: transparentize(white, 0.7); }
+  }
+  &.color-light {
+    color: black;
+    outline-color: transparentize(white, 0.5);
+    &:backdrop { color: transparentize(black, 0.7); }
+  }
+
+  // border color
+  &.overlay,
+  &.overlay:selected {
+    border: 1px solid if($variant == 'light', transparentize(black, 0.7), $borders_color);
+    &:hover { border-color: if($variant == 'light', transparentize(black, 0.5), black); }
+  }
+
+  // make the add color button looks like, well, a button
+  &#add-color-button {
+    border-style: solid; // the borders are drawn by the overlay for standard colorswatches to have them semi
+    border-width: 1px;   // translucent on the colored background, here it's not necessary so they need to be set
+    @include button(normal);
+    &:hover { @include button(hover); }
+    &:backdrop { @include button(backdrop); }
+    .overlay { @include button(undecorated); } // reset the overlay to not cover the button style underneat
+  }
+}
+
+
+/********
+ * Misc *
+ ********/
+
+.scale-popup .button { // +/- buttons on GtkVolumeButton popup
+  padding: 6px;
+  &:hover {
+    @extend %undecorated_button;
+    background-color: transparentize($fg_color,0.9);
+    border-radius: 5px;
+  }
+  &:backdrop,
+  &:backdrop:hover,
+  &:backdrop:insensitive { @extend %undecorated_button; }
+}
+
+GtkVolumeButton.button { padding: 8px; }
+
+/**********************
+ * Window Decorations *
+ *********************/
+
+.window-frame {
+  border-radius: 7px 7px 0 0;
+  // lamefun trick to get rounded borders regardless of CSD use
+  border-width: 0px;
+
+  // this needs to be transparent
+  // see bug #722563
+  $_wm_border: if($variant=='light', transparentize(black, 0.77), transparentize($borders_color, 0.1));
+  $_wm_border_backdrop: if($variant=='light', transparentize(black, 0.82), transparentize($borders_color, 0.1));
+
+  box-shadow: 0 3px 9px 1px transparentize(black, 0.5),
+              0 0 0 1px $_wm_border; //doing borders with box-shadow
+
+  // FIXME rationalize window-frame shadows
+
+  /* this is used for the resize cursor area */
+  margin: 10px;
+
+  &:backdrop {
+    box-shadow: 0 2px 6px 2px transparentize(black, 0.8),
+                0 0 0 1px $_wm_border_backdrop;
+  }
+  &.tiled {
+    border-radius: 0;
+  }
+  &.popup {
+    box-shadow: none;
+  }
+  // server-side decorations as used by mutter
+  &.ssd {
+    box-shadow: 0 0 0 1px $_wm_border; //just doing borders, wm draws actual shadows
+  }
+  &.csd {
+    .popup {
+      border-radius: 0;
+      box-shadow: 0 1px 2px transparentize(black, 0.8),
+                  0 0 0 1px transparentize($_wm_border,0.1);
+    }
+    &.tooltip {
+      border-radius: 5px;
+      box-shadow: none;
+    }
+    &.message-dialog {
+      border-radius: 7px;
+      box-shadow: 0 1px 2px transparentize(black, 0.8),
+                  0 0 0 1px transparentize($_wm_border,0.1);
+    }
+  }
+  &.solid-csd {
+    border-radius: 0;
+    margin: 4px;
+    background-color: $backdrop_bg_color;
+    border: solid 1px $backdrop_borders_color;
+    box-shadow: none;
+  }
+}
+
+// Window Close button
+.header-bar .button.titlebutton,
+.titlebar .button.titlebutton {
+  @extend .button;
+  @extend .button.flat;
+  @extend .image-button;
+  @include _button_text_shadow;
+  &:backdrop { icon-shadow: none; }
+}
+
+.header-bar.selection-mode .button.titlebutton,
+.titlebar.selection-mode .button.titlebutton {
+  @include _button_text_shadow(white, $selected_bg_color);
+  &:backdrop { icon-shadow: none; }
+}
+
+
+// catch all extend :)
+
+%selected_items {
+  background-color: $selected_bg_color;
+  color: $selected_fg_color;
+  @if $variant == 'light' {
+    outline-color: transparentize($selected_fg_color, 0.7);
+  }
+  &:backdrop {
+    color: $backdrop_selected_fg_color;
+    background-color: $backdrop_selected_bg_color;
+  }
+}
+
+/* Decouple the font of context menus from their entry/textview */
+.touch-selection,
+.context-menu {
+  font: initial;
+}
+
+.monospace {
+  font: Monospace;
+}
+
+// This is used by GtkScrolledWindow, when content is touch-dragged past boundaries.
+// This draws a box on top of the content, the size changes programmatically.
+.overshoot {
+  &.top {
+    @include overshoot(top);
+    &:backdrop { @include overshoot(top, backdrop); }
+  }
+  &.bottom {
+    @include overshoot(bottom);
+    &:backdrop { @include overshoot(bottom, backdrop); }
+  }
+  &.left {
+    @include overshoot(left);
+    &:backdrop { @include overshoot(left, backdrop); }
+  }
+  &.right {
+    @include overshoot(right);
+    &:backdrop { @include overshoot(right, backdrop); }
+  }
+}
+
+// Overflow indication, works similarly to the overshoot, the size if fixed tho.
+.undershoot {
+  &.top {
+    @include undershoot(top);
+  }
+
+  &.bottom {
+    @include undershoot(bottom);
+  }
+
+  &.left {
+    @include undershoot(left);
+  }
+
+  &.right {
+    @include undershoot(right);
+  }
+}