* {
  padding: 0;
  background-clip: padding-box;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  -GtkToolButton-icon-spacing: 4;
  -GtkTextView-error-underline-color: $error_color;
  -GtkPaned-handle-size: 1;

  -GtkCheckButton-indicator-size: 20;
  -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; //

  -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-style: solid;
  outline-width: 2px;
  outline-color: $fill_color;
  outline-offset: -4px;
  outline-radius: 2px;
}


/***************
 * Base States *
 ***************/

.background {
  background-color: $bg_color;
  color: $fg_color;
}

.background:backdrop {
  color: $backdrop_fg_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;
  @extend %row;
  &:prelight {
  }
  &:active {
  }
  &:insensitive {
    color: $insensitive_fg_color;
  }
  &:selected {
    background-color: $selected_bg_color;
    color: $selected_fg_color;
  }
}

%row {
  background-image: -gtk-gradient(radial,
                                  center center, 0,
                                  center center, 0.75,
                                  to(gtkalpha(currentColor,0)),
                                  to(transparent)),
                    linear-gradient(to bottom, gtkalpha(currentColor,0));
  &:hover {
    background-image: -gtk-gradient(radial,
                                    center center, 0,
                                    center center, 0.001,
                                    to(gtkalpha(currentColor,0)),
                                    to(transparent)),
                      linear-gradient(to bottom, gtkalpha(currentColor,0.05));
  }
  &:active {
    background-image: -gtk-gradient(radial,
                                    center center, 0,
                                    center center, 0.75,
                                    to(gtkalpha(currentColor,0.1)),
                                    to(transparent)),
                      linear-gradient(to bottom, gtkalpha(currentColor,0));
  }
}

.view {
  @extend %row;
  background-color: $base_color;
  color: $fg_color;
  &:backdrop { color: $backdrop_fg_color; }
  &:selected:backdrop { color: $backdrop_selected_fg_color; }
  &:selected { @extend %selected_items; }
}

.rubberband {
  border: 1px solid $selected_bg_color;
  background-color: transparentize($selected_bg_color,0.8);
}

// This is used by GtkScrolledWindow, when rendering the edge
// gradient shown when content is touch-dragged past boundaries.
// The color is used as a base for such gradient, which is then
// stretched/modified as a direct result of user interaction.
.overshoot {
  background-color: transparentize($selected_bg_color,0.8);
}

GtkLabel {
  &.separator {
    color: $fg_color;
    @extend .dim-label;
    &:backdrop { color: $backdrop_fg_color; }
  }
  &:selected {
    @extend %selected_items;
  }
  &:insensitive {
    color: $insensitive_fg_color;
    &:backdrop { color: $backdrop_insensitive_fg_color; }
  }
}

.dim-label {
  opacity: 0.5;
}

GtkAssistant {
  .sidebar {
    padding: 6px 0;
    border-top: 1px solid $borders_color;
    &:dir(ltr) { border-right: 1px solid $borders_color; }
    &:dir(rtl) { border-left: 1px solid $borders_color; }
  }
  &.csd .sidebar { border-top-style: none; }
  .sidebar GtkLabel {
    opacity: 0.5;
    padding: 5px 12px 6px;
    font-weight: bold;
  }
  .sidebar GtkLabel.highlight {
    opacity: 1;
  }
}

GtkTextView { // This will get overridden by .view, needed by gedit line numbers
  background-color: mix($bg_color, $base_color, 50%);
}

GtkFlowBox .grid-child {
  outline-offset: -2px;
  padding: 4px;
  border-radius: 2px;
  &:selected { @extend %selected_items; }
}

%osd, .osd {
  opacity: 0.9;
}

/*********************
 * Spinner Animation *
 *********************/

@keyframes spin {
  to { -gtk-icon-transform: rotate(1turn); }
}

.spinner {
  background-color: blue;
  background-image: none;
  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: 0.4;
    }
    &:backdrop {
      opacity: 0.8;
      &:insensitive {
        opacity: 0.8 * 0.4;
      }
    }
  }
}

/****************
 * Text Entries *
 ****************/

.entry {
  padding: 7px 6px 8px;
  border-radius: 2px;
  @include entry(normal);
  &.flat { @include entry(flat); }
  &:focus { @include entry(focus); }
  &.flat:focus { @include entry(flat-focus); }
  &:insensitive { @include entry(insensitive); }
  &.flat:insensitive { @include entry(flat-insensitive); }
  &:backdrop { @include entry(backdrop); }
  &:backdrop:insensitive { @include entry(backdrop-insensitive); }
  &:selected { @extend %selected_items; }
  &.image { // icons inside the entry
    @extend .button.flat;
    @extend %clickable_fg;
    &.left {
      margin-right: 6px;
      padding: 4px;
    }
    &.right {
      margin-left: 6px;
      padding: 4px;
    }
  }
  &.error {
    @include entry(normal, $error_color);
    &.flat { @include entry(flat, $error_color); }
    &:focus { @include entry(focus, $error_color); }
    &.flat:focus { @include entry(flat-focus, $error_color); }
    &:insensitive { @include entry(insensitive, $error_color); }
    &.flat:insensitive { @include entry(flat-insensitive, $error_color); }
    &:selected { @extend %selected_items; }
  }
  &.warning {
    @include entry(normal, $warning_color);
    &.flat { @include entry(flat, $warning_color); }
    &:focus { @include entry(focus, $warning_color); }
    &.flat:focus { @include entry(flat-focus, $warning_color); }
    &:insensitive { @include entry(insensitive, $warning_color); }
    &.flat:insensitive { @include entry(flat-insensitive, $warning_color); }
    &:selected { @extend %selected_items; }
  }
  &.progressbar {
    margin: 2px;
    border-style: solid;
    border-width: 0 0 2px;
    border-color: $selected_bg_color;
    border-radius: 0;
    box-shadow: none;
    background-color: transparent;
    background-image: none;
  }
  .linked & { @extend %linked; }
  .linked.vertical & { @extend %linked_vertical; }
  .linked &.flat,
  .linked.vertical &.flat { border-radius: 0; }
}

/***********
 * Buttons *
 ***********/

// stuff for .needs-attention
@keyframes needs_attention {
  from {
    background-image: -gtk-gradient(radial,
                                    center center, 0,
                                    center center, 0.001,
                                    to($selected_bg_color),
                                    to(transparent));
  }
  to {
    background-image: -gtk-gradient(radial,
                                    center center, 0,
                                    center center, 0.5,
                                    to($selected_bg_color),
                                    to(transparent));
  }
}


.button {
  padding: 7px 10px 8px;
  border-radius: 2px;
  @include button(normal);
  &.flat { @include button(flat); }
  &:hover { @include button(hover); }
  &.flat:hover { @include button(flat-hover); }
  &:active { @include button(active); }
  &.flat:active { @include button(flat-active); }
  &:insensitive { @include button(insensitive); }
  &.flat:insensitive { @include button(flat); }
  &:checked { @include button(checked); }
  &:insensitive:checked { @include button(insensitive-checked); }
  &:backdrop { @include button(backdrop); }
  &:backdrop:insensitive { @include button(backdrop-insensitive); }
  // big standalone buttons like in Documents pager
  &.osd {
    &.image-button { padding: 16px; }
    &:insensitive {
      opacity: 0;
    }
  }
  //overlay / OSD style
  .osd & {
    // FIXME: for some reason I can't figure out the bookmark button in gnome
    //        documents gets borders radius 0, when they get backdrop and
    //        another state

    // 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
    &:dir(rtl) {
    }
    &:first-child {
    }
    &:last-child {
    }
    &:only-child {
    }
    // Workaround END
    &:hover {
    }
    &:active, &:checked, &:backdrop:active, &:backdrop:checked {
    }
    &:insensitive, &:backdrop:insensitive {
    }
    &:backdrop {
    }
  }

  // Suggested and Destructive Action buttons
  @each $b_type, $b_color in (suggested-action, $selected_bg_color),
                              (destructive-action, $destructive_color) {
    &.#{$b_type} {
      font-weight: bold;
      @include button(normal, $b_color);
      &.flat { @include button(flat, $b_color); }
      &:hover { @include button(hover, $b_color); }
      &.flat:hover { @include button(flat-hover, $b_color); }
      &:active { @include button(active, $b_color); }
      &.flat:active { @include button(flat-active, $b_color); }
      &:insensitive { @include button(insensitive, $b_color); }
      &.flat:insensitive { @include button(flat-insensitive, $b_color); }
      &:checked { @include button(checked, $b_color); }
      &:checked:insensitive { @include button(checked-insensitive, $b_color); }
      &:backdrop { @include button(backdrop, $b_color); }
      &:backdrop:insensitive { @include button(backdrop-insensitive, $b_color); }
      .osd & {
      }
    }
  }

  &.image-button {
    outline-radius: 100px;
    padding: 10px;
    border-radius: 100px;
  }

  &.text-button {
    padding-left: 20px;
    padding-right: 20px;
  }

  &.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: 7px 10px 8px; // same as .button
    GtkLabel:first-child { padding-left: 8px; }
    GtkLabel: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.
    > GtkLabel {
      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: 7px 14px 8px; // 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: 7px 4px;
    }
    &.needs-attention > GtkLabel,
    &.needs-attention > GtkImage {
      animation: needs_attention 0.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
      background-repeat: no-repeat;
      background-position: right 3px;
      background-size: 6px 6px;
      &:dir(rtl) {
        background-position: left 3px;
      }
    }
    &.needs-attention:active > GtkLabel,
    &.needs-attention:active > GtkImage,
    &.needs-attention:checked > GtkLabel,
    &.needs-attention:checked > GtkImage {
      animation: none;
      background-image: none;
    }
  }

  //inline-toolbar buttons
  .inline-toolbar &, .inline-toolbar &:backdrop {
    @extend .button.flat;
    @extend .image-button;
  }

  .primary-toolbar & { // tango icons don't need shadows
    icon-shadow: none;
  }

  .linked & { @extend %linked; }
  .linked.vertical & { @extend %linked_vertical; }

  .linked &.flat,
  .linked.vertical &.flat {
    outline-radius: 2px;
    border-radius: 2px;
  }
  .linked &.image-button:only-child,
  .linked.vertical &.image-button:only-child,
  .linked &.image-button.flat,
  .linked.vertical &.image-button.flat {
    outline-radius: 100px;
    border-radius: 100px;
  }
}

// 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...
}

// More inline toolbar buttons
.inline-toolbar.toolbar GtkToolButton,
.inline-toolbar.toolbar GtkToolButton:backdrop {
}

%linked_middle {
  border-radius: 0;
}

%linked {
  margin: 2px;
  outline-radius: 2px;
  @extend %linked_middle;
  &:first-child {
    border-radius: 2px 0 0 2px;
  }
  &:last-child {
    border-radius: 0 2px 2px 0;
  }
  &:only-child {
    border-radius: 2px;
  }
}

%linked_vertical{
  &:first-child {
    border-radius: 2px 2px 0 0;
  }
  &:last-child {
    border-radius: 0 0 2px 2px;
  }
  &:only-child {
    border-radius: 2px;
  }
}

/* menu buttons */
.menuitem.button.flat {
  @extend .button.flat;
  &:selected { @extend %selected_items; }
}

GtkColorButton.button {
  padding: 7px 8px 8px; // Uniform padding on the GtkColorButton
  GtkColorSwatch {
    border-radius: 0;
  }
}

/*********
 * Links *
 *********/

*:link {
  @extend .button.flat;
  color: $link_color;
  &:visited {
    color: $link_visited_color;
    *:selected & { color: mix($selected_fg_color, $selected_bg_color, 60%); }
  }
  &:selected, *:selected & {
    color: mix($selected_fg_color, $selected_bg_color, 80%);
  }
}

.button:link {
  color: $link_color;
}

.button:visited {
  color: $link_visited_color;
}

/*****************
 * GtkSpinButton *
 *****************/

.spinbutton {
  .button {
    padding: 4px;
    border: solid 6px transparent;
    @extend .button.flat;
    @extend .image-button;
    @extend %clickable_fg;
  //  &:dir(rtl) { border-style: none solid none none; }
  }
  &.vertical, &.vertical:dir(rtl) {
    .button {
      padding-top: 10px;    //  Same vertical padding as image-buttons
      padding-bottom: 10px; //
      border: none;
      &:first-child {
        border-radius: 2px 2px 0 0;
      }
      &:last-child {
        border-radius: 0 0 2px 2px;
      }
    }
    &.entry {
    }
  }
/* This is to fix spinbuttons in entries, but I feel like hiding code issues
 * hence it's commented atm.
 *  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: 5px 6px 6px; } // Otherwise combos
                                    // are bigger then
                                    // buttons
  -GtkComboBox-arrow-scaling: 0.5;
  -GtkComboBox-shadow-type: none;

  &:checked { color: $selected_fg_color; }
  &:insensitive { color: $insensitive_fg_color; }
  &:backdrop { color: $backdrop_fg_color; }
  &:backdrop:insensitive { color: $backdrop_insensitive_fg_color; }
  .menuitem { text-shadow: none; }
  .separator {
    // always disable separators
    -GtkWidget-wide-separators: true;
    -GtkWidget-horizontal-separator: 0;
    -GtkWidget-vertical-separator: 0;
  }
  &.combobox-entry .entry { @extend %linked; }
  &.combobox-entry .button, &.combobox-entry .button:backdrop {
    padding: 10px;
    // 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; }
}
.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;
}

/************
 * Toolbars *
 ************/
.toolbar {
  -GtkWidget-window-dragging: true;
  padding: 4px;
  background-color: $bg_color;
  .osd &, &.osd {
    padding: 2px;
    $asset_suffix: if($variant=='dark', '-dark', '');
    border-style: solid;
    border-width: 12px;
    border-image: -gtk-scaled(url("assets/osd-shadow#{$asset_suffix}.png"),
                              url("assets/osd-shadow#{$asset_suffix}@2.png"))
                  12 / 12px stretch;
    border-radius: 0;
  //  @include shadow(2);
    background-color: $base_color;
    &:backdrop {
      border-image: -gtk-scaled(url("assets/osd-shadow-backdrop#{$asset_suffix}.png"),
                                url("assets/osd-shadow-backdrop#{$asset_suffix}@2.png"))
                    12 / 12px stretch;
    }
    & .button {
      @extend .button.flat;
    }
  }
}

//searchbar, location-bar & inline-toolbar
.inline-toolbar {
  padding: 4px;
  border-width: 0 1px 1px;
  border-style: solid;
  border-color: $borders_color;
  background-color: $insensitive_base_color;
}

.search-bar, .location-bar {
  -GtkWidget-window-dragging: true;
  @extend %inset-bar;
  padding: 4px;
  border-width: 0 0 1px;
}

%inset-bar {
  border-style: solid;
  border-color: $borders_color;
  background-color: $dark_color;
  //FIXME edge would be nice, but doesn't work
}

/***************
 * Header bars *
 ***************/

.titlebar,
.header-bar {
  padding: 6px;
  border-style: solid;
  border-width: 0 0 1px;
  border-color: $borders_color;
  border-radius: 4px 4px 0 0;
  background-color: $dark_color;
  background-clip: border-box;

  .title {
    padding: 0px 12px;
    font-weight: bold;
  }
  .subtitle {
    padding: 0 12px;
    font-size: smaller;
    @extend .dim-label;
  }
  .header-bar-separator,
  & > GtkBox > .separator.vertical {
    -GtkWidget-wide-separators: true;
    -GtkWidget-separator-width: 1px;
    border-style: solid;
    border-width: 0 1px;
    border-color: $borders_color;
  }
  & .button {
    @extend .button.flat;
    border-image: -gtk-gradient(radial,
                                center bottom, 0,
                                center bottom, 0.001,
                                to($selected_bg_color),
                                to(transparent))
                                0 0 0 / 0 0 0px;
    &:checked {
      border-image: -gtk-gradient(radial,
                                  center bottom, 0,
                                  center bottom, 0.75,
                                  to($selected_bg_color),
                                  to(transparent))
                                  0 0 2 / 0 0 2px;
      background-color: gtkalpha(currentColor,0);
      color: $fg_color;
    }
    &:insensitive:checked {
      background-color: gtkalpha(currentColor,0);
      color: $fg_color;
    }
    @each $b_type, $b_color in (suggested-action, $selected_bg_color),
                               (destructive-action, $destructive_color) {
      &.#{$b_type} {
        outline-offset: -4px;
      //  @extend .button.#{$b_type};
        @include button(normal, $b_color);
        &:hover { @include button(hover, $b_color); }
        &:active { @include button(active, $b_color); }
        &:insensitive { @include button(insensitive, $b_color); }
        &:checked { @include button(checked, $b_color); }
        &:checked:insensitive { @include button(checked-insensitive, $b_color); }
        &:backdrop { @include button(backdrop, $b_color); }
        &:backdrop:insensitive { @include button(backdrop-insensitive, $b_color); }
      }
    }
  }
  & .stack-switcher,
  & .path-bar {
    box-shadow: inset 0 -1px $fill_color;
    & .button {
      font-weight: bold;
    //  @extend %clickable_fg;
      color: gtkalpha($fg_color,0.6);
      &:backdrop { color: gtkalpha($fg_color,0.6 * 0.8); }
      &:hover, &:active, &:checked { color: $fg_color; }
      &:hover:backdrop, &:active:backdrop, &:checked:backdrop { color: $backdrop_fg_color; }
    }
  }

  &.selection-mode {
    background-color: $selected_bg_color;
    color: $selected_fg_color;
    &:backdrop { color: $backdrop_selected_fg_color; }
    .subtitle:link { @extend *:link:selected;  }
    .button {
      color: $selected_fg_color;
      &.flat { color: $selected_fg_color; }
      &:hover {
      }
      &.suggested-action {
        @extend .button;
      }
    }
    .selection-menu {
      padding-left: 20px;
      padding-right: 20px;
      GtkArrow { -GtkArrow-arrow-scaling: 1; }
      .arrow {
        -gtk-icon-source: -gtk-icontheme('pan-down-symbolic');
        color: $selected_fg_color;
      }
    //  &:backdrop { @extend .selection-menu };
    }
  }
  .tiled &, .maximized & {
    border-radius: 0; // squared corners when the window is max'd or tiled
  }
}

/************
 * Pathbars *
 ************/

.path-bar .button {
  padding: 7px 4px 8px;
  &.image-button { padding: 10px; }
  &:only-child {
    padding-left: 20px;
    padding-right: 20px;
  }

  // the following is for spacing the icon and the label inside the home button
  GtkLabel:last-child { padding-left: 2px; }
  GtkLabel:first-child { padding-right: 2px; }
  GtkLabel:only-child { padding-right: 0; padding-left: 0; }
  GtkImage { padding-top: 0; }
}

/**************
 * Tree Views *
 **************/
GtkTreeView.view { // treeview grid lines and expanders, unfortunatelly
                   // the tree lines color can't be set
  -GtkTreeView-grid-line-width: 1;
  -GtkTreeView-grid-line-pattern: '';
  -GtkTreeView-tree-line-width: 1;
  -GtkTreeView-tree-line-pattern: '';
  -GtkTreeView-expander-size: 16;
  border-color: $fill_color; // this is actually the line color
  // :selected is ignored hence no style for it
  &.expander {
    -gtk-icon-source: -gtk-icontheme('pan-end-symbolic');
    &:dir(rtl) { -gtk-icon-source: -gtk-icontheme('pan-end-symbolic-rtl'); }
    &:checked {
      -gtk-icon-source: -gtk-icontheme('pan-down-symbolic');
    }
    @extend .button.flat;
    @extend %clickable_fg;
  }
  &.progressbar { // progress bar in treeviews
    border-radius: 2px;
    background-color: $success_color;
    color: $selected_fg_color;
    &:selected {
    }
  }
  &.trough { // progress bar trough in treeviews
    border-radius: 2px;
    background-color: $fill_color;
    &:selected {
    }
  }
  & .entry {
    @include entry(normal);
    &:selected { @extend %selected_items; }
  }
}

column-header {
  .button {
    padding: 5px 6px 6px;
    border-width: 0 1px 1px 0;
    border-style: solid;
    border-color: $borders_color;
    border-image: none;
    border-radius: 0;
    box-shadow: none;
    background-color: $base_color;
    @extend %row;
    @extend %clickable_fg;
    font-weight: bold;
    &:hover { box-shadow: none; }
    &.dnd {
  //    @extend column-header.button.dnd;
    }
  }
  &:last-child .button,
  &:last-child.button { //treeview-like derived widgets in Banshee and Evolution
    border-right-width: 0;
  }
}

column-header.button.dnd { // for treeview-like derive widgets
  background-color: $fill_color;
  color: $fg_color;
}


/*********
 * Menus *
 *********/
.menubar {
  -GtkWidget-window-dragging: true;
  padding: 0px;
  box-shadow: inset 0 -1px $borders_color;
  & > .menuitem {
    padding: 4px 8px;
    &:hover { //Seems like it :hover even with keyboard focus
      box-shadow: inset 0 -3px $selected_bg_color;
    }
    &:insensitive {
      color: $insensitive_fg_color;
      box-shadow: none;
    }
  }
}

.menu {
  margin: 4px;
  padding: 0px;
  background-color: $base_color;
  .menuitem {
    transition-duration: 0.1s;
    padding: 5px 6px 6px;
    background-color: transparentize($base_color,1);
    text-shadow: none;
    &:hover {
      background-color: $selected_bg_color;
      color: $selected_fg_color;
    }
    &:insensitive {
      color: $insensitive_fg_color;
      &:backdrop { color: $backdrop_insensitive_fg_color; }
    }
    &:backdrop, &:backdrop:hover {
      color: $backdrop_fg_color;
    }
    //submenu indicators
    &.arrow { -gtk-icon-source: -gtk-icontheme('pan-end-symbolic'); }
    &.arrow:dir(rtl) {-gtk-icon-source:-gtk-icontheme('pan-end-symbolic-rtl'); }
  }
}

.menuitem .accelerator { color: gtkalpha(currentColor,0.5); }


/***************
 * Popovers   *
 ***************/

.popover {
  margin: 10px;
  padding: 2px;
 // border: 1px solid $borders_color;
  border-radius: 4px;
  background-clip: border-box;
  background-color: $bg_color;

  @include shadow(2);
  &:backdrop {
    @include shadow(1);
  }
  & > .list,
  & > .view,
  & > .toolbar
  &.osd > .toolbar {
    border-style: none;
    background-color: transparent;
  }
  .button.flat {
    padding: 5px 6px 6px;
    border-image: none;
  }
  &.osd { // Also used for touch cut'n'paste overlays
          // FIXME Doesn't work
    border: 1px solid $borders_color;
    .button {
    }
  }
}

//touch selection handlebars for the Popover.osd above
.entry.cursor-handle,
.cursor-handle {
  border-style: none;
  box-shadow: none;
  background-color: transparent;
  background-image: 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: 8;
  -GtkNotebook-arrow-spacing: 5;
  -GtkNotebook-tab-curvature: 0;
  -GtkNotebook-tab-overlap: 1;
  -GtkNotebook-has-tab-gap: false;
  -GtkWidget-focus-padding: 0;
  -GtkWidget-focus-line-width: 0;
  &.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; }
  }
  &.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: $dark_color;

    // 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; }
    }

    &.top {
      box-shadow: inset 0 -1px $borders_color; // border
    }
    &.bottom {
      box-shadow: inset 0 1px $borders_color;
    }
    &.right {
      box-shadow: inset 1px 0 $borders_color;
    }
    &.left {
      box-shadow: inset -1px 0 $borders_color;
    }
  }
  tab {
    outline-offset: 0;
    border-style: solid;
    border-width: 0;
    border-color: transparent;
    background-color: transparent;
    background-clip: border-box;

    $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: $fill_color;
    }
    &:active, &.active-page {
      border-color: $selected_bg_color;
    }
    @each $_tab, $_border in (top, bottom),
                             (bottom, top),
                             (left, right),
                             (right, left) {
      &.reorderable-page.#{$_tab} {
        border-color: transparent;
        &:hover, &.prelight-page {
          border-color: $borders_color;
          border-#{$_border}-width: 1px;
          background-color: $bg_color;
        }
        &:active, &.active-page {
          background-color: $light_color;
          border-color: $borders_color;
          border-#{$_border}-width: 1px;
        }
      }
    }
    GtkLabel { //tab text
      padding: 0 2px; // needed for a nicer focus ring
      font-weight: bold;
      color: transparentize($fg_color, 0.4);
      @extend %fg_states;
    }
    .prelight-page GtkLabel, GtkLabel.prelight-page {
      // prelight tab text
      color: transparentize($fg_color, 0.2);
    }
    .active-page GtkLabel, GtkLabel.active-page {
      // active tab text
      color: $fg_color;
    }
    .button { //tab close button
      padding: 0;
      @extend .button.flat;
      @extend .image-button;
      @extend %clickable_fg;
      & > GtkImage { // this is a hack which makes tabs grow
        padding: 4px;
      }
    }
  }
  &.arrow {
    @extend .button.flat;
    @extend %clickable_fg;
  }
  & .entry {
    @extend .entry.flat;
  }
}

/**************
 * Scrollbars *
 **************/

.scrollbar {
  border-style: solid;
  background-image: none;
  -GtkRange-trough-border: 0;
  -GtkScrollbar-has-backward-stepper: false;
  -GtkScrollbar-has-forward-stepper: false;
  -GtkRange-slider-width: 17;
  -GtkScrollbar-min-slider-length: 24; // minimum size for the slider.
                                       // sadly can't be in '.slider'
                                       // where it belongs

  -GtkRange-stepper-spacing: 0;
  -GtkRange-trough-under-steppers: 1;
  .button {
    @extend .button.flat;
    @extend %clickable_fg;
  }
  &.trough {
    background-color: $base_color;
    &.horizontal { box-shadow: inset 0 1px $borders_color; }
    &.vertical { box-shadow: inset 1px 0 $borders_color; }
    }
  &.slider {
    opacity: 0.5;
    border: 4px solid transparent; //margin :/
    border-radius: 8px;
    background-color: gtkalpha(transparentize($fg_color, 0.4), 0.5);
    &.horizontal {
      border-top-width: 5px;
      border-top-left-radius: 8px 9px;
      border-bottom-right-radius: 8px 9px;
      //FIXME
    }
    &.vertical {
      border-left-width: 5px;
      border-top-left-radius: 9px 8px;
      border-bottom-left-radius: 9px 8px;
    }
    &:hover {
      background-color: gtkalpha(transparentize($fg_color, 0.2), 0.5);
    }
    &:active {
      background-color: gtkalpha($fg_color, 0.5);
    }
    &:insensitive {
      opacity: 0.5 * 0.4;
      background-color: gtkalpha(transparentize($fg_color, 0.4), 0.5 * 0.4);
    }
    &:backdrop {
      opacity: 0.5 * 0.8;
      background-color: gtkalpha(transparentize($fg_color, 0.4), 0.5 * 0.8);
    }
    &:hover:backdrop {
      background-color: gtkalpha(transparentize($fg_color, 0.2), 0.5 * 0.8);
    }
    &:active:backdrop {
      background-color: gtkalpha($fg_color, 0.5 * 0.8);
    }
    &:insensitive:backdrop {
      opacity: 0.5 * 0.4 * 0.8;
      background-color: gtkalpha(transparentize($fg_color, 0.4), 0.5 * 0.4 * 0.8);
    }
    &.fine-tune {
      border-width: 6px;
      &.horizontal {
        border-top-width: 7px;
        border-top-left-radius: 8px 9px;
        border-bottom-right-radius: 8px 9px;
        //FIXME
      }
      &.vertical {
        border-left-width: 7px;
        border-top-left-radius: 9px 8px;
        border-bottom-left-radius: 9px 8px;
      }
    }
  }
}

.scrollbars-junction,
.scrollbars-junction.frame { // the small square between two scrollbars
  border-style: none;
  box-shadow: inset 0 1px $borders_color,
              inset 1px 0 $borders_color;
  background-color: mix($bg_color, $base_color, 50%);
}


/**********
 * Switch *
 **********/

GtkSwitch {
  -GtkSwitch-slider-width: 60px; // 55px is the right value to make it as tall
                                 // as buttons, not doing that for now
  outline-offset: -10px;
  outline-radius: 100px;
  font-weight: bold;
  &.trough {
    // similar to the .scale
    border-radius: 2px;
    background-color: $fill_color;
    &:active {
      background-color: $success_color;
      color: $selected_fg_color;
      &:insensitive { background-color: $fill_color; }
      &:backdrop { color: $backdrop_selected_fg_color; }
   //   &:backdrop:insensitive { color: transparentize($selected_fg_color, 1 - 0.4 * 0.8); }
    }
    &:insensitive { color: $insensitive_fg_color; }
    &:backdrop { color: $backdrop_fg_color; }
    &:backdrop:insensitive { color: $backdrop_insensitive_fg_color; }
  }
  &.slider {
    padding: 0;
    outline-radius: 100px;
    border-radius: 0;
    $asset_suffix: if($variant=='dark', '-dark', '');
    background-image: -gtk-scaled(url("assets/switch-slider#{$asset_suffix}.png"),
                                  url("assets/switch-slider#{$asset_suffix}@2.png"));
    background-repeat: no-repeat;
    background-position: center;
    &:hover {
      background-image: -gtk-scaled(url("assets/switch-slider-hover#{$asset_suffix}.png"),
                                    url("assets/switch-slider-hover#{$asset_suffix}@2.png"));
    }
    &:insensitive {
      background-image: -gtk-scaled(url("assets/switch-slider-insensitive#{$asset_suffix}.png"),
                                    url("assets/switch-slider-insensitive#{$asset_suffix}@2.png"));
    }
   // @include entry(normal);
   // &:hover { @include entry(focus); }
   // &:insensitive { @include entry(insensitive); }
  }
  .list-row:selected & {
    &:backdrop { color: $backdrop_selected_fg_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'),
                  (':active', '-unchecked-active'),
                  (':insensitive','-unchecked-insensitive'),
                  (':backdrop', '-unchecked-backdrop'),
                  (':backdrop:active', '-unchecked-backdrop-active'),
                  (':backdrop:insensitive', '-unchecked-backdrop-insensitive'),
                  (':inconsistent', '-mixed'),
                  (':inconsistent:active', '-mixed-active'),
                  (':inconsistent:insensitive', '-mixed-insensitive'),
                  (':inconsistent:backdrop', '-mixed-backdrop'),
                  (':inconsistent:backdrop:active', '-mixed-backdrop-active'),
                  (':inconsistent:backdrop:insensitive', '-mixed-backdrop-insensitive'),
                  (':checked', '-checked'),
                  (':checked:active', '-checked-active'),
                  (':checked:insensitive','-checked-insensitive'),
                  (':checked:backdrop', '-checked-backdrop'),
                  (':checked:backdrop:active', '-checked-backdrop-active'),
                  (':checked:backdrop: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: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
      &:hover { icon-shadow: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23); }
      &:insensitive { icon-shadow: none; }
   //   &.button.flat { icon-shadow: none; }
    }
  }

  //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
GtkTreeView.view.check, GtkTreeView.view.radio,
.list-row .check, list-row .radio {
 // icon-shadow: none;
 // &:selected, &:hover { icon-shadow: none; }
}

//selection-mode
@each $s,$as in ('','-selectionmode'),
                  (':active', '-active-selectionmode'),
                  (':insensitive', '-insensitive-selectionmode'),
                  (':backdrop', '-backdrop-selectionmode'),
                  (':backdrop:active', '-backdrop-active-selectionmode'),
                  (':backdrop:insensitive', '-backdrop-insensitive-selectionmode'),
                  (':checked', '-checked-selectionmode'),
                  (':checked:active', '-checked-active-selectionmode'),
                  (':checked:insensitive', '-checked-insensitive-selectionmode'),
                  (':checked:backdrop', '-checked-backdrop-selectionmode'),
                  (':checked:backdrop:active', '-checked-backdrop-active-selectionmode'),
                  (':checked:backdrop:insensitive', '-checked-backdrop-insensitive-selectionmode') {
  GtkIconView.view.check#{$s},
  GtkFlowBox.view.check#{$s} {
    -gtk-icon-source: -gtk-scaled(url("assets/checkbox#{$as}#{$asset_suffix}.png"),
                                  url("assets/checkbox#{$as}#{$asset_suffix}@2.png"));
    icon-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    &:hover { icon-shadow: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23); }
    &:insensitive { icon-shadow: none; }
    background-color: transparent;
  }
}

GtkCheckButton.text-button, GtkRadioButton.text-button {
  // this is for a nice focus on check and radios text
  padding: 2px 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_fg_color; }
  }
}

/************
 * GtkScale *
 ************/
.scale,
.scale.scale-has-marks-above.scale-has-marks-below,
.scale.vertical.scale-has-marks-above.scale-has-marks-below {
  -GtkScale-slider-length: 20;
  -GtkRange-slider-width: 20;
  -GtkRange-trough-border: 2;
  margin: 10px;
  outline-offset: -8px;
  outline-radius: 100px;
  &.fine-tune {
    margin: 8px;
    outline-offset: -6px;
    outline-radius: 100px;
    &.trough { border-radius: 100px; }
  }
  &.slider {
    border-radius: 50%;
    background-color: $success_color;
    &:hover {
    background-image: linear-gradient(to bottom, gtkalpha($selected_fg_color,0.1));
    }
    &:active {
    background-image: linear-gradient(to bottom, gtkalpha($selected_fg_color,0.2));
    }
    &:insensitive { background-color: $insensitive_base_color; }
  //  @include entry(normal);
  //  &:hover { @include entry(focus); }
  //  &:insensitive { @include entry(insensitive); }
    //OSD sliders
    .osd & {
    }
  }
  &.trough {
    border-radius: 100px;
    background-color: $fill_color;
    &.highlight {
      background-color: $success_color;
      &:insensitive {
        background-color: $fill_color;
      }
    }
    &:insensitive { color: $insensitive_fg_color; }
    &:backdrop { color: $backdrop_fg_color; }
    &:backdrop:insensitive { color: $backdrop_insensitive_fg_color; }
    //OSD troughs
    .osd & {
      &.highlight {
      }
      &:insensitive, &:backdrop:insensitive {
      }
      &:backdrop {
      }
    }
  }
  .list-row:selected & {
    &:backdrop { color: $backdrop_selected_fg_color; }
  }
}

$asset_suffix: if($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') {
        &.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;
        }
      }
    }
  }
}

%scale_marks_above_horz {
  margin: 14px 10px 10px;
  &.fine-tune { margin: 12px 8px 8px; }
}
%scale_marks_below_horz {
  margin: 10px 10px 14px;
  &.fine-tune { margin: 8px 8px 12px; }
}
%scale_marks_above_vert {
  margin: 10px 10px 10px 14px;
  &.fine-tune { margin: 8px 8px 8px 12px; }
}
%scale_marks_below_vert {
  margin: 10px 14px 10px 10px;
  &.fine-tune { margin: 8px 12px 8px 8px; }
}

/*****************
 * Progress bars *
 *****************/

GtkProgressBar {
  -GtkProgressBar-min-horizontal-bar-height: 8;
  padding: 0;
  font-size: smaller;
  color: transparentize($fg_color, 0.5);
  &:backdrop {
    color: transparentize($fg_color, 1 - 0.5 * 0.8);
  }
  &.osd {
    -GtkProgressBar-xspacing: 0;
    -GtkProgressBar-yspacing: 0;
    -GtkProgressBar-min-horizontal-bar-height: 3;
  }
}

// moving bit
.progressbar {
  border-radius: 0;
  background-color: $selected_bg_color;
  &.left {
    border-top-left-radius: 100px;
    border-bottom-left-radius: 100px;
  }
  &.right {
    border-top-right-radius: 100px;
    border-bottom-right-radius: 100px;
  }
  &.left.right {
    box-shadow: none;
  }
  &.vertical {
    &.bottom {
      border-bottom-left-radius: 100px;
      border-bottom-right-radius: 100px;
      box-shadow: none;
    }
    &.top {
      border-top-left-radius: 100px;
      border-top-right-radius: 100px;
    }
  }
  &:backdrop {
  }
  &.osd {
    background-image: none;
    background-color: $selected_bg_color;
    border-style: none;
    border-radius: 0;
  }
}

// background
GtkProgressBar.trough {
  border-radius: 100px;
 // background-color: $fill_color;
  background-color: gtkalpha(currentColor,0.4);
  &.osd {
    border-style: none;
    background-color: transparent;
    box-shadow: none;
    //FIXME: there is a margin on top
  }
}

/*************
 * Level Bar *
 *************/

GtkLevelBar {
  -GtkLevelBar-min-block-width: 36;
  -GtkLevelBar-min-block-height: 4;
}

GtkLevelBar.vertical {
  -GtkLevelBar-min-block-width: 4;
  -GtkLevelBar-min-block-height: 36;
}

.level-bar {
  &.trough {
    padding: 2px;
    border-radius: 100px;
    background-color: $fill_color;
  //  @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-radius: 100px;
    background-color: $selected_bg_color;
    &.indicator-discrete {
      &.horizontal {
        margin-right: 1px;
        &:last-child { margin-right: 0; }
        &:dir(rtl) { margin-left: 0; }
      }
      &.vertical {
        margin: 1px 0; }
    }
    &.level-high {
      background-color: $success_color;
    }
    &.level-low {
      background-color: $error_color;
    }
    &.empty-fill-block {
    //  background-color: $fill_color;
      background-color: transparent;
      border-color: transparent;
    }
  }
}


/**********
 * Frames *
 **********/
.frame {
  border: 1px solid $borders_color;
  &.flat { border-style: none; }
  padding: 0;
  &.action-bar {
    padding: 6px;
    border-width: 1px 0 0;
    background-color: $insensitive_base_color;
  }
}

GtkScrolledWindow {
  .frame { border-radius: 0; }
  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: $borders_color;

  // Font and File button separators
  GtkFileChooserButton &,
  GtkFontButton & {
    // always disable separators
    -GtkWidget-wide-separators: true;
    -GtkWidget-horizontal-separator: 0;
    -GtkWidget-vertical-separator: 0;
  }
}

/*********
 * Lists *
 *********/

.list, .list-row {
  background-color: $base_color;
  border-color: $borders_color;
}

.list-row,
.grid-child {
  padding: 2px;
}

.list-row.button {
  @extend %row;
  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:selected {
  @extend %selected_items;
  .button {
    &.flat { color: $selected_fg_color; }
    &.flat:insensitive { color: transparentize($selected_fg_color, 0.6); }
    &.flat:backdrop { color: transparentize($selected_fg_color, 0.2); }
    &.flat:backdrop:insensitive { color: transparentize($selected_fg_color, 0.2); }
  }
}

/*********************
 * App Notifications *
 *********************/

.app-notification,
.app-notification.frame {
  @extend %osd;
  padding: 6px 2px 2px;
  $asset_suffix: if($variant=='dark', '-dark', '');
  border-style: solid;
  border-width: 0 12px 12px;
  border-image: -gtk-scaled(url("assets/osd-shadow#{$asset_suffix}.png"),
                            url("assets/osd-shadow#{$asset_suffix}@2.png"))
                12 / 0 12px 12px stretch;
 // border-radius: 0 0 4px 4px;
  border-radius: 0;
 // @include shadow(2);
  background-color: $base_color;
  &:backdrop {
    border-image: -gtk-scaled(url("assets/osd-shadow-backdrop#{$asset_suffix}.png"),
                              url("assets/osd-shadow-backdrop#{$asset_suffix}@2.png"))
                  12 / 0 12px 12px stretch;
  }
  .button {
    &.flat {
    }
  }
}

/* Floating status bar */
.floating-bar {
  @extend %osd;
  padding: 11px 0 0;
  $asset_suffix: if($variant=='dark', '-dark', '');
  border-style: solid;
  border-width: 12px;
  border-image: -gtk-scaled(url("assets/osd-shadow#{$asset_suffix}.png"),
                            url("assets/osd-shadow#{$asset_suffix}@2.png"))
                12 / 12px stretch;
  border-radius: 0;
 // @include shadow(2);
  background-color: $base_color;
}

.floating-bar.bottom.left { /* axes left border and border radius */
  border-width: 12px 12px 0 0;
  border-image-width: 12px 12px 0 0;
}

.floating-bar.bottom.right { /* axes right border and border radius */
  border-width: 12px 0 0 12px;
  border-image-width: 12px 0 0 12px;
}

/*************
 * Expanders *
 *************/

GtkExpander {
  -gtk-icon-source: -gtk-icontheme('pan-end-symbolic');
  &:dir(rtl) { -gtk-icon-source: -gtk-icontheme('pan-end-symbolic-rtl'); }
  &:checked { -gtk-icon-source: -gtk-icontheme('pan-down-symbolic'); }
  @extend .button.flat;
 // @extend %clickable_fg;
}

/************
 * Calendar *
 ***********/
GtkCalendar {
  border: 1px solid $borders_color;
  &:selected {
    padding: 6px;
    border-radius: 2px;
    background-color: $selected_bg_color;
    color: $selected_fg_color;
    &:backdrop {
    }
  }
  &.header {
  //  @extend .titlebar;
    @extend %inset-bar;
  //  border: 1px solid $borders_color;
    border-radius: 0;
  }
  &.button {
    @extend .button.flat;
    @extend %clickable_fg;
    &:hover {
    }
  }
  &.highlight { color: gtkalpha(currentColor,0.5); }
}

/***********
 * Dialogs *
 ***********/

.message-dialog .dialog-action-area .button {
  padding: 8px;
}

.message-dialog { // Message Dialog styling
  -GtkDialog-button-spacing: 0;
  .titlebar {
    border-style: none;
    background-color: $light_color;
  }
  &.csd {
    &.background {
      background-color: $light_color;
    }
    .dialog-action-area .button {
      outline-offset: -4px;
      padding: 9px 20px 10px;
      border-top: 1px solid $borders_color;
      border-image: none;
      border-radius: 0;
      background-color: $light_color;
      @extend .button.flat;
      &:hover { outline-color: $fill_color; }
      &:active { outline-color: $fill_color; }
    //  &: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: 0;
    }
    %first_button {
      border-left-style: none;
      border-bottom-left-radius: 0;
    }
  }
}

GtkFileChooserDialog {
  .search-bar {
    border-color: $borders_color;
    background-color: $dark_color;
  }
  .dialog-action-box {
    border-top: 1px solid $borders_color;
  }
}

/***********
 * Sidebar *
 ***********/

.sidebar,
.sidebar .view {
  border: none;
  background-color: $insensitive_base_color;
  &:selected {
    background-color: $selected_bg_color;
    color: $selected_fg_color;
    &:backdrop { color: $backdrop_selected_fg_color; }
  }
  .scrollbar {
    &.trough {
   //   background-color: $insensitive_base_color;
    }
    &.slider {
    }
  }
  .separator:backdrop { @extend .separator; } // overriden w/o this
}

GtkPaned {
  // This is actually the invisible area of the paned separator, not a margin...
  margin: 0 8px 8px 0; //drag area of the separator
  &:dir(rtl) {
    margin-right: 0;
    margin-left: 8px;
  }
}

.pane-separator {
  //FIXME abusing a background-image to get rid of the handle decoration
  //I'd like something better...
  background-image: linear-gradient(to bottom, $borders_color);
}

/**************
 * GtkInfoBar *
 **************/
GtkInfoBar {
  border-style: none;
}

.info {
  background-color: $link_color;
  color: $selected_fg_color;
}

.question {
  background-color: $link_visited_color;
  color: $selected_fg_color;
}

.warning {
  background-color: $warning_color;
  color: $selected_fg_color;
}

.error {
  background-color: $error_color;
  color: $selected_fg_color;
}

.info,
.question,
.warning,
.error {
  .button {
    background-color: $fill_color;
    color: $selected_fg_color;
    &.flat { background-color: transparent; }
  }
}

/************
 * 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.
    @extend %osd;
    background-color: $base_color;
  }

  color: $fg_color;
  padding: 4px; /* not working */
  border-radius: 4px;
  box-shadow: none; // otherwise it gets inherited by windowframe.csd
  // 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 {
  @include shadow(1);
  &:hover {
    @include shadow(2);
  }
  &.color-light {
  }
  &.color-dark {
  }

  &.top {
    border-top-left-radius: 2px;
    border-top-right-radius: 2px;
  }
  &.bottom {
    border-bottom-left-radius: 2px;
    border-bottom-right-radius: 2px;
  }
  &.left, &:first-child {
    border-top-left-radius: 2px;
    border-bottom-left-radius: 2px;
  }
  &.right, &:last-child {
    border-top-right-radius: 2px;
    border-bottom-right-radius: 2px;
  }
  &:only-child {
    border-radius: 2px;
  }
  &:selected:hover {
    background-image: none;
  }
  &.color-active-badge {
    border-width: 2px;
    border-style: solid;
    &:hover { background-image: none; }
    &.color-light, &.color-light:hover {
      border-color: black;
      color: black;
    }
    &.color-dark, &.color-dark:hover {
      border-color: white;
      color: white;
    }
  }
}
GtkColorChooserWidget #add-color-button {
  background-image: if($variant =='light',
                    linear-gradient(to right,
                                    #e74c3c 25%,
                                    #f1c40f 25%,
                                    #f1c40f 50%,
                                    #2ecc71 50%,
                                    #2ecc71 75%,
                                    #3498db 75%),
                    linear-gradient(to right,
                                    #c0392b 25%,
                                    #f39c12 25%,
                                    #f39c12 50%,
                                    #27ae60 50%,
                                    #27ae60 75%,
                                    #2980b9 75%)
                    );
  color: white;
}


/********
 * Misc *
 ********/

.scale-popup .button { // +/- buttons on GtkVolumeButton popup
  padding: 10px;
  @extend .button.flat;
}

GtkVolumeButton.button {
  padding: 10px;
  @extend .image-button;
}

/**********************
 * Window Decorations *
 *********************/

.window-frame {
  border-radius: 4px 4px 0 0;
  // lamefun trick to get rounded borders regardless of CSD use
  border-width: 0px;

  @include shadow(4);

  /* this is used for the resize cursor area */
  margin: 8px;

  &:backdrop {
    @include shadow(2);
  }
  &.tiled {
    border-radius: 0;
  }
  &.csd {
    &.popup {
      border-radius: 0;
      @include shadow(2);
    }
    &.tooltip {
      border-radius: 4px;
      @include shadow(2);
    }
    &.message-dialog {
      border-radius: 4px 4px 0 0;
      @include shadow(4);
      &:backdrop { @include shadow(2); }
    }
  }
}

// Window Close button
.header-bar .button.titlebutton,
.titlebar .button.titlebutton {
 // @extend .button;
  @extend .button.flat;
  @extend .image-button;
  @extend %clickable_fg;
}

.header-bar.selection-mode .button.titlebutton,
.titlebar.selection-mode .button.titlebutton {
}


// catch all extend :)

%clickable_fg {
  color: transparentize($fg_color, 1 - 0.6);
  outline-color: gtkalpha(currentColor, 0.333);
  &:hover { color: $fg_color; outline-color: gtkalpha(currentColor, 0.1); }
  &:active { color: $fg_color; outline-color: gtkalpha(currentColor, 0); }
  &:insensitive { color: transparentize($fg_color, 1 - 0.6 * 0.4); }
  &:backdrop { color: transparentize($fg_color, 1 - 0.6 * 0.8); }
  &:backdrop:hover { color: transparentize($fg_color, 1 - 0.8); }
  &:backdrop:active { color: transparentize($fg_color, 1 - 0.8); }
  &:backdrop:insensitive { color: transparentize($fg_color, 1 - 0.6 * 0.4 * 0.8); }
  &:selected {
    color: transparentize($selected_fg_color, 1 - 0.6);
    &:hover { color: $selected_fg_color; }
    &:active { color: $selected_fg_color; }
    &:insensitive { color: transparentize($selected_fg_color, 1 - 0.6 * 0.4); }
    &:backdrop { color: transparentize($selected_fg_color, 1 - 0.6 * 0.8); }
    &:backdrop:hover { color: transparentize($selected_fg_color, 1 - 0.8); }
    &:backdrop:active { color: transparentize($selected_fg_color, 1 - 0.8); }
    &:backdrop:insensitive { color: transparentize($selected_fg_color, 1 - 0.6 * 0.4 * 0.8); }
  }
}

%fg_states {
  &:insensitive {
    opacity: 0.4;
  }
  &:backdrop {
    opacity: 0.8;
  }
  &:backdrop:insensitive {
    opacity: 0.8 * 0.4;
  }
}

%selected_items {
  background-color: $selected_bg_color;
  color: $selected_fg_color;
  &:backdrop { color: $backdrop_selected_fg_color; }
}