@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;
  -GtkPaned-handle-size: 1;
  -gtk-icon-style: symbolic; //force symbolic style icons

  -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-horizontal-separator: 4;

  -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: $bg_color;
}

.background:backdrop {
    text-shadow: none;
    -gtk-icon-shadow: none;

    color: lighten($fg_color,10%);
    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-icon-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;
  }
}

textview text,
.view {
  color: $fg_color;
  background-color: $base_color;
  &:backdrop {
    color: $backdrop_fg_color;
    background-color: $backdrop_base_color;
  }
  & selection,
  & selection:focus,
  & selection:hover {
    @extend %selected_items;
  }
}

iconview {
  color: $fg_color;
  background-color: $base_color;
  &:backdrop {
    color: $backdrop_fg_color;
    background-color: $backdrop_base_color;
  }
  &:selected,
  &:selected:focus {
    @extend %selected_items;
  }
}

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

flowbox {
  & rubberband { @extend rubberband; }
  flowboxchild {
    padding: 3px;
    border-radius: 3px;
    &:selected {
      @extend %selected_items;
      outline-offset: -2px;
    }
  }
}

label {
  & selection,
  & selection:focus,
  & selection:hover,
  & selection:backdrop {
    @extend %selected_items;
  }
  &:insensitive, &:backdrop:insensitive {
    color: $insensitive_fg_color;
  }
}

/*********************
 * 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');
  &:checked {
    opacity: 1;
    animation: spin 1s linear infinite;
    &:insensitive {
      opacity: 0.5;
    }
  }
}

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

entry, spinbutton {
  padding: 7px 4px;
  border-radius: 3px;
  border-width: 1px;
  transition: all 200ms ease-out;
  @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); }
  & selection, & selection:backdrop {
    background-color: $selected_bg_color;
    color: $selected_fg_color;
  }
  & selection
  & selection:focus {
    @extend %selected_items;
  }
  & progress {
    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 & {
    &:first-child {
      border-top-right-radius: 0;
      border-bottom-right-radius: 0;
      &:dir(rtl) { border-right-style: none;}
    }
    &:last-child {
      border-top-left-radius: 0;
      border-bottom-left-radius: 0;
      border-left-style: none;
      &:dir(rtl) { border-left-style: solid; }
    }
  }
  .linked.vertical & { //FIXME comment stuff and make the whole thing smarter.
    @include entry(normal);
    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);
      border-bottom-color: mix($borders_color, $base_color, 30%);
      @extend %linked_vertical;
      &:backdrop {
        @include entry(backdrop-insensitive);
        border-bottom-color: mix($backdrop_borders_color, $backdrop_base_color, 30%);
        @extend %linked_vertical;
      }
    }
    &:backdrop {
      @include entry(backdrop);
      border-bottom-color: mix($backdrop_borders_color, $backdrop_base_color, 30%);
      @extend %linked_vertical;
    }
    &:first-child {
      @include entry(normal);
      border-bottom-color: mix($borders_color, $base_color, 30%);
      &:focus { @include entry(focus); }
      &:insensitive {
        @include entry(insensitive);
        border-bottom-color: mix($backdrop_borders_color, $backdrop_base_color, 30%);
        @extend %linked_vertical:first-child;
        &:backdrop {
          @include entry(backdrop-insensitive);
          border-bottom-color: mix($backdrop_borders_color, $backdrop_base_color, 30%);
          border-top-style: solid;
        }
      }
      &:backdrop {
        @include entry(backdrop);
        border-bottom-color: mix($backdrop_borders_color, $backdrop_base_color, 30%);
        @extend %linked_vertical:first-child;
      }
    }
    &:last-child {
      @include entry(normal);
      border-top-width: 0;
      background-image: linear-gradient(to bottom, $base_color);
      box-shadow: none;
      &:focus {
        border-color: entry_focus_border($selected_bg_color);
        box-shadow: entry_focus_glow($selected_bg_color),
                    0 -1px 0 0 entry_focus_border($selected_bg_color);
        @extend %linked_vertical: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;
      }
    }
  }
  
  &.error {
    color: $error_color;
    border-color: $error_color;
    &:focus { @include entry(focus, $error_color); }
    &:selected, &:selected:focus {
      background-color: $error_color;
    }
  }
  &.warning {
    color: $warning_color;
    border-color: $warning_color;
    &:focus { @include entry(focus, $warning_color); }
    &:selected, &:selected:focus {
      background-color: $warning_color;
    }
  }
}

/***********
 * Buttons *
 ***********/
// stuff for .needs-attention
$_dot_color: $selected_bg_color;

@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 {
  border-radius: 3px;
  transition: all 200ms ease-out;
  padding: 4px 6px;
  @include button(normal);
  &:hover, &.flat:hover {
    @include button(hover);
    -gtk-icon-effect: highlight;
  }
  &:active, &.flat:active,
  &:checked, &.flat:checked {
    @include button(active);
    transition-duration: 50ms;
  }
  &:backdrop, &.flat:backdrop {
    @include button(backdrop);
    &:active, &:checked {
      @include button(backdrop-active);
    }
    &:insensitive {
      @include button(backdrop-insensitive);
    }
    &:insensitive:active {
      @include button(backdrop-insensitive-active);
    }
  }
  //&:selected, &.flat:selected,       Why this?
  //&:selected:focus, &.flat:focus {
  //  @extend %selected_items;
  //}
  &:insensitive {
    @include button(insensitive);
    &:active, &.flat:active {
      @include button(insensitive-active);
    }

  }
  &.flat, &.flat:backdrop, &.flat:insensitive:backdrop {
    @extend %undecorated_button;
  }
  //overlay / OSD style
  .osd & {
    padding: 6px;
    border-width: 1px 1px 2px 1px;
    @include button(osd);
    @extend %linked;
    &:hover {
      @include button(osd-hover);
      @extend %linked;
    }
    &:active, &:checked {
      @include button(osd-active);
      @extend %linked;
    }
    &:insensitive {
      @include button(osd-insensitive);
      @extend %linked;
    }
    &:backdrop {
      @include button(osd-backdrop);
      @extend %linked;
    }
  }
  // Suggested and Destructive Action buttons
  @each $b_type, $b_color in (suggested-action, $suggested_color),
                              (destructive-action, $destructive_color) {
    &.#{$b_type} {
      @include button(normal,$b_color, white);
      &:hover {
        @include button(hover,$b_color, white);
      }
      &:active, &:checked {
        @include button(active,$b_color, white);
      }
      &:backdrop {
        @include button(backdrop,$b_color,white);
        &:insensitive {
          @include button(backdrop-insensitive);
        }
      }
      &:insensitive {
        @include button(insensitive);
      }
    }
  }

  // buttons in header bars and action bars
  &.image-button { padding: 8px; }
  &.text-button { padding: 6px 8px 5px; } // due to font metrics

  //inline-toolbar buttons
  .inline-toolbar &, .inline-toolbar &:backdrop {
    border-radius: 2px;
    border-width: 1px;
    @extend %linked;
  }

  .primary-toolbar & { -gtk-icon-shadow: none; } // tango icons don't need added shadows
//  .separator {
//    -GtkWidget-wide-separators: true;
//   }
  .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; }
}

// all the following is for the +|- buttons on inline toolbars, that way
// should really be reprecated...
.inline-toolbar toolbutton > button { // redefining the button look is
                                               // needed since those are flat...
  @include button(normal, $edge: none); // the box-shadow outset doesn't work
                                          // in this case, hence $edge: none
  &:hover { @include button(hover, $edge: none); }
  &:active { @include button(active, $edge: none); }
  &:insensitive { @include button(insensitive, $edge: none); }
  &:insensitive:active { @include button(insensitive-active, $edge:none); }
  &:backdrop { @include button(backdrop); };
  &:backdrop:active { @include button(backdrop-active); }
  &:backdrop:insensitive { @include button(backdrop-insensitive); }
  &:backdrop:insensitive:active { @include button(backdrop-insensitive-active);}
}
toolbar.inline-toolbar toolbutton { // .inline-toolbar.toolbar here for
                                        // higher specificity than the previous
                                        // "button look" selector
  & > button.flat {
    border-radius: 0;
    border-left-style: none;
  }
  &:dir(rtl) > button.flat {}
  &:first-child > button.flat {
    border-radius: 3px 0 0 3px;
    border-left-style: solid;
  }
  &:last-child > button.flat {
    border-radius: 0 3px 3px 0;
  }
  &:last-child:dir(rtl) > button.flat {
    border-right-style: solid;
  }
  &:only-child > button.flat {
    border-radius: 3px;
    border-style: solid;
  }
}

%needs_attention {
  animation: needs_attention 150ms ease-in;
  $_dot_shadow: $fg_color;
  $_dot_shadow_r: 0.5;
  background-image: -gtk-gradient(radial,
                                  center center, 0,
                                  center center, 0.5,
                                  to($_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;
  background-position: right 3px, right 4px;
  &:backdrop { background-size: 6px 6px, 0 0;}
  &:dir(rtl) {
    background-position: left 3px, left 4px;
  }
}

%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;
  text-shadow: none;
  -gtk-icon-shadow: none;
}

/* menu buttons */
modelbutton.flat,
.menuitem.button.flat {
  @extend %undecorated_button;
  outline-offset: -1px;
  &:hover, &:selected { @extend %selected_items; }
  &:backdrop {
    color: $backdrop_fg_color;
    @extend %undecorated_button;
    &:hover { color: $selected_fg_color; background-color: $selected_bg_color; }
  }
  &:insensitive { color: $insensitive_fg_color; }
}

button.color { padding: 4px; } // Uniform padding on the
                                        // GtkColorButton.button

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

*:link {
  color: $selected_bg_color; //FIXME use a proper color
  &:hover, &:active, &:visited {
    color: mix($fg_color, $selected_bg_color, 40%); //FIXME same here
  }
  &:backdrop, &:backdrop:hover {
    color: $selected_bg_color;
  }
}

button:link, button:visited {
  color: $suggested_color;
  font-weight: bold;
  @extend %undecorated_button;
  text-shadow: none;
  &:hover, &:active {
    @extend %undecorated_button;
    color: mix($fg_color, $selected_bg_color, 40%); //FIXME same here
    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
    color: $selected_bg_color; //FIXME use a proper color
  }
}

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

spinbutton {
  button {
    @include entry(normal);
    background-image: none;
    border-width: 0 0 0 1px;
    border-color: transparentize($borders_color,0.7);
    color: mix($fg_color,$base_color,95%);
    border-radius: 0;
  //  padding-left: 6px;
  //  padding-right: 6px;
    &:dir(rtl) { border-width: 0 1px 0 0; }
    &:hover {
      color: $fg_color;
      background-color: transparentize(black,0.95);
    }
    &:insensitive {
      box-shadow: none;
      color: transparentize($insensitive_fg_color,0.7);
    }
    &:active {
      box-shadow: inset 0 2px 3px -1px transparentize(black,0.8);
      background-color: transparentize(black,0.9);
    }
    &:backdrop {
      border-color: transparentize($backdrop_borders_color,0.7);
      background-color: $bg_color;
      box-shadow: none;
    }
    &:backdrop:insensitive {
      box-shadow: none;
      color: transparentize($insensitive_fg_color,0.7);
      border-width: 0 0 0 1px; // It is needed or it gets overridden
      &:dir(rtl) { border-width: 0 1px 0 0; }
    }
  }
  &.vertical {
    button {
      &: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);
        }
      }
      &: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;
    }
    %top_button {
      border-radius: 3px 3px 0 0;
      border-bottom-width: 0;
    }
    %bottom_button {
      border-radius: 0 0 3px 3px;
      border-top-width: 0;
    }
  }
/* This is to fix spinbuttons in entries, but I feel like hiding code issues
 * hence it's commented atm.
 *  treeview.view & {
 *   & entry, & entry:focus {
 *     padding: 1px;
 *     border-width: 1px 0;
 *     border-color: $selected_bg_color;
 *     border-radius: 0;
 *     box-shadow: none;
 *   }
 * }
 */
}

/**************
 * ComboBoxes *
 **************/
combobox {

  //FIXME padding issue
  padding: 0;

  -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;
    -gtk-icon-shadow: none;
  }
  &:backdrop {
    color: $backdrop_fg_color;
    text-shadow: none;
    -gtk-icon-shadow: none;
  }
  &:backdrop:insensitive {
    color: $insensitive_fg_color;
  }
  .menuitem { text-shadow: none; }
  & separator.vertical {
    // always disable separators
    -GtkWidget-wide-separators: true;
  }
  &.combobox-entry entry {
    border-radius: 3px 0 0 3px;
    &:dir(rtl) {
      border-radius: 0 3px 3px 0;
    }
  }
  &.combobox-entry button, &.combobox-entry button:backdrop {
    // It is needed to specify the backdrop button or it gets overridden
    border-radius: 0 3px 3px 0;
    border-left-style: none;
    &:dir(rtl) {
      border-radius: 3px 0 0 3px;
      border-left-style: solid;
      border-right-style: none;
    }
  }
}

.linked > combobox > button {
  // The combo is a composite widget so the way we do
  // button linking 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 > combobox:first-child > button {
  @extend %linked:first-child;
}
.linked > combobox:last-child > button {
  @extend %linked:last-child;
}
.linked > combobox:only-child > button {
  @extend %linked:only-child;
}
.linked.vertical > combobox  > button {
  @extend %linked_vertical_middle;
}
.linked.vertical > combobox:first-child > button {
  @extend %linked_vertical:first-child;
}
.linked.vertical > combobox:last-child > button {
  @extend %linked_vertical:last-child;
}
.linked.vertical > combobox:only-child > button {
  @extend %linked_vertical:only-child;
}

/************
 * Toolbars *
 ************/
toolbar { //FIXME: why is all this being ignored?
  padding: 6px;
  background-color: $bg_color;
  &.osd {
    background-color: $osd_bg_color;
    border-radius: 6px;
    padding: 12px;
    & label { color: $osd_fg_color; }
  }
  //searchbar & inline-toolbar
  &.inline-toolbar {
    @extend %inset-bar;
    border-width: 0 1px 1px;
    padding: 3px;
    border-radius: 0  0 4px 4px;
  }
  &.vertical {
    border-right: 1px solid $borders_color;
    &:dir(rtl) {
      border-right: none;
      border-left: 1px solid $borders_color;
    }
  }
}

searchbar {
  @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%);
  //FIXME edge would be nice, but doesn't work
  &:backdrop {
    border-color: $backdrop_borders_color;
    background-color: mix($backdrop_borders_color,$backdrop_bg_color, 35%);
    box-shadow: none;
  }
}

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

.titlebar,
headerbar {
  border-width: 0 0 1px;
  border-style: solid;
  border-color: $borders_color;
  border-radius: 7px 7px 0 0;

  background-color: transparent;
  background-image: linear-gradient(to bottom,
                                    lighten($bg_color,4%),
                                    $bg_color);
  box-shadow: inset 0 -1px mix($borders_color, $bg_color, 30%), // bottom shade
              inset 0 1px $borders_edge; // top highlight
  padding: 6px;

  &:backdrop {
    border-color: $backdrop_borders_color;
    background-color: $bg_color;
    background-image: none;
    box-shadow: none;
  }

  .title {
    font: Bold;
    padding: 0px 12px;
  }
  .subtitle {
    font-size: 80%;
    padding: 0 12px;
  }
  .header-bar-separator,
  & > GtkBox > separator.vertical {
    -GtkWidget-wide-separators: true;
    -GtkWidget-separator-width: 1px;
    border-width: 0 1px;
    border-color: $fg_color;
    border-style: solid;
  }
  &.selection-mode {
    color: darken($selected_bg_color, 15%);
    text-shadow: 0 1px transparentize(black, 0.5);
    background-image: linear-gradient(to bottom,
                                    lighten($selected_bg_color,5%),
                                    lighten($selected_bg_color,2%));
    box-shadow: inset 0 -1px mix($borders_color,$bg_color, 30%), //bottom shade
                inset 0 1px mix($borders_edge,$selected_bg_color, 50%); //top highlight
    button {
      @include button(normal, $selected_bg_color, $selected_fg_color, $edge: none);
      &:hover { @include button(hover, $selected_bg_color, $selected_fg_color, $edge: none); }
      &:active { @include button(active, $selected_bg_color, $selected_fg_color, $edge: none); }
      &:insensitive { @include button(insensitive, $selected_bg_color, $selected_fg_color, $edge: none); }
      &:backdrop {
        @include button(backdrop, $selected_bg_color, $selected_fg_color, $edge: none);
        border-color: darken($selected_bg_color, 15%);
      }
      &:backdrop:insensitive { @include button(backdrop-insensitive, $selected_bg_color, $selected_fg_color, $edge: none); }
      &.suggested-action {
        @include button($t:normal, $edge: none);
        &:hover { @include button($t:hover,$edge: none); }
        &:active { @include button($t:active, $edge: none); }
        &:insensitive { @include button($t:insensitive, $edge: none); }
        &:backdrop { @include button($t:backdrop, $edge: none); }
        &:backdrop:insensitive { @include button($t:backdrop-insensitive, $edge: none); }
      }
    }
    .selection-menu {
      border-width: 0;
      background-image: none;
      box-shadow: none;
    }
  }
  .tiled &, .maximized & {
    border-radius: 0; // squared corners when the window is max'd or tiled
  }
}

/************
 * 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; }
  image { padding-top: 1px; }
}


/**************
 * Tree Views *
 **************/
treeview.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

  & rubberband { @extend rubberband; } // to avoid borders being overridden by the previously set props

  &:selected {
    border-radius: 0;
    @extend %selected_items;
  }

  &: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, $selected_bg_color, 40%);
      &:backdrop { color: mix($selected_fg_color, $selected_bg_color, 50%); }
    }
    &:backdrop { color: $insensitive_fg_color; }
  }

  &.separator:backdrop {
    color: transparentize(black, 0.9);
  }

  &:backdrop {
    color: $backdrop_fg_color;
    border-left-color: mix($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: $selected_fg_color; }
      &:backdrop { color: mix($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
    color: $base_color;

    border: 1px solid $selected_borders_color;
    border-radius: 4px;
    background-color: $fg_color;

    &:selected { color: $selected_bg_color; }
      
    &:backdrop {
      color: $selected_bg_color;
      border-color: $selected_borders_color; // otherwise it gets inherited by .view(?!?)  
      background-color: $backdrop_base_color;
    }
  }
  
  &.trough { // progress bar trough in treeviews
    background-color: transparentize($fg_color,0.9);
    border-radius: 4px;

    &:selected { 
      background-color: transparentize($selected_fg_color, 0.7);
      border-width: 1px 0;
      border-style: solid;
      border-color: $selected_bg_color;
    }
  }

  header {
    button {
      @extend %column_header_button;
      $_column_header_color: mix($fg_color,$base_color,50%);
      color: $_column_header_color;
      font-weight: bold;
      text-shadow: none;
      box-shadow: none;
      &:hover {
        @extend %column_header_button;
        color: mix($_column_header_color,$fg_color,50%);
        box-shadow: none;
      }
      &:active {
        @extend %column_header_button;
        color: $selected_fg_color;
      }
    }
    & :last-child.button,
    &:last-child.button { //treeview-like derived widgets in Banshee and Evolution
      border-right-style: none;
    }
  }
}

%column_header_button {
  border-width: 0 1px 1px 0;
  border-radius: 0;
  background-image: none;
  border-color: $bg_color;
  text-shadow: none;
  &:insensitive {
    border-width: 0 1px 1px 0;
    border-color: $bg_color;
    background-image: none;
  }
  &:backdrop {
    border-color: $backdrop_bg_color;
    border-width: 0 1px 1px 0;
    color: mix($backdrop_fg_color, $backdrop_bg_color,50%);
    background-image: none;
    &:insensitive {
      border-width: 0 1px 1px 0;
      border-color: $backdrop_bg_color;
      background-image: none;
    }
  }
}

treeview.view.progressbar { //Progressbar in treeview cells
  color: $base_color;
  border-radius: 4px;
  background-image: linear-gradient(to bottom,
                                    $selected_bg_color,
                                    darken($selected_bg_color,10%));
  &:selected {
    color: $selected_bg_color;
    background-image: linear-gradient(to bottom,
                                     $base_color,
                                     darken($base_color,10%));
    &:backdrop {
      color: $selected_bg_color;
      background-image: none;
      background-color: $backdrop_base_color;
    }
  }
  &:backdrop {
    color: $backdrop_base_color;
    background-image: none;
  }
}

/*********
 * Menus *
 *********/
.menubar {
  padding: 0px;
  background-color: mix($fg_color,$bg_color,5%); //Uhm?
  &: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: $selected_bg_color;
    }
    &:insensitive {
      color: $insensitive_fg_color;
      box-shadow: none;
    }
  }
}

menu,
.menu {
  padding: 0px;
  background-color: $base_color;
  //border: 1px solid $borders_color;
  .menuitem {
    padding: 4px;
    &:hover {
      color: $selected_fg_color;
      background-color: $selected_bg_color;
    }
    &:insensitive {
      color: $insensitive_fg_color;
      &:backdrop { color: $insensitive_fg_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'); }
  }
}



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

popover {
  margin: 10px;
  padding: 2px;
  border-color: $borders-color;
  border-width: 1px;
  border-style: solid;
  border-radius: 5px;
  //background-clip: border-box;
  background-color: $bg_color;

  box-shadow: 0 2px 3px transparentize(black, 0.5);
  &:backdrop {
    box-shadow: none;
  }
  & > .list,
  & > .view,
  & > toolbar {
    background-color: transparent;
  }
  separator {
    color: $fg_color;
    background-color: transparent;
    border: 0;
  }
  button.flat,
  button.flat:hover {
    color: $fg_color;
    text-shadow: none;
    transition: none;
  }
  &.magnifier,
  &.osd { // Also used for touch cutnpaste overlays
          // FIXME Doesn't work
    background-image: none;
    background-color: $osd_bg_color;
    border: 1px solid $borders_color;
    color: $osd_fg_color;
    button {
      color: white;
      text-shadow: none;
      @include button(osd);
      &:hover { @include button(osd-hover); };
      &:active { @include button(osd-active); };
      &:insensitive { @include button(osd-insensitive); };
    }
  }
}

/*****************
 * Notebooks and *
 * Tabs          *
 *****************/

notebook {
  -GtkNotebook-initial-gap: 10;
  -GtkNotebook-arrow-spacing: 5;
  -GtkNotebook-tab-curvature: 0;
  -GtkNotebook-tab-overlap: -8;
  -GtkNotebook-has-tab-gap: false;

  // 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;
  transition: all 200ms ease-out;
  &:backdrop {
    background-color: $backdrop_base_color;
  }
  &.frame {
    border: 1px solid $borders_color;
    &: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 $backdrop_borders_color; }
    }
    &:backdrop {
      // same color as backdrop pushed button
      background-color: mix($backdrop_borders_color,$backdrop_bg_color, 35%);
      box-shadow: none;
    }
    & tabs 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); }
    }
  }
  //vertical tab sizing
  $vt_vpadding: 8px;
  $vt_hpadding: 20px;
  // horizontal tab sizing
  $ht_vpadding: 5px;
  $ht_hpadding: 20px;
  $tab_indicator_size: 3px;

  & header.top tab {
    padding: $vt_vpadding $vt_hpadding;
    border-bottom-width: $tab_indicator_size;
    &.reorderable-page {
      padding-left: 12px;  // for a nicer close button
      padding-right: 12px; // placement
      border-left-width: 1px;
      border-right-width: 1px;
    }
  }
  & header.bottom tab {
    padding: $vt_vpadding $vt_hpadding;
    border-top-width: $tab_indicator_size;
    &.reorderable-page {
      padding-left: 12px;  // for a nicer close button
      padding-right: 12px; // placement
      border-left-width: 1px;
      border-right-width: 1px;
    }
  }
  & header.left tab {
    padding: $ht_vpadding $ht_hpadding;
    border-right-width: $tab_indicator_size;
    &.reorderable-page {
      border-bottom-width: 1px;
      border-top-width: 1px;
    }
  }
  & header.right tab {
    padding: $ht_vpadding $ht_hpadding;
    border-left-width: $tab_indicator_size;
    &.reorderable-page {
      border-bottom-width: 1px;
      border-top-width: 1px;
    }
  }

  & tab {
    border-width: 0;
    border-style: solid;
    border-color: transparent;
    background-color: transparent;

    outline-offset: 0;

    //here's the interesting stuff
    &:hover {
      border-color: $borders_color;
    }
    &:active, &:backdrop:active {
      border-color: $selected_bg_color;
    }
    &:backdrop {
      background-color: transparent;
      border-color: transparent;
    }
    @each $_tab, $_border in (top, bottom),
                             (bottom, top),
                             (left, right),
                             (right, left) {
      .#{$_tab} &.reorderable-page {
        border-color: transparent;
        &:hover {
          border-color: transparentize($borders_color,0.7);
          border-#{$_border}-color: $borders_color;
          background-color: transparentize($bg_color,0.8);
        }
        &:active {
          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; /* color: inherit doesn't work here */
      &:backdrop {
        color: $insensitive_fg_color;
      }
    }
    &:hover label {
      // prelight tab text
      color: mix($fg_color, $insensitive_fg_color, 50%);
    }
    &:active label {
      // active tab text
      color: $fg_color;
      &:backdrop { color: $backdrop_fg_color; }
    }
    button { //tab close button
      border: 2px solid transparent;
      @extend %undecorated_button;
      -gtk-icon-shadow: none;
      transition: none;
      color: transparentize($fg_color,0.7);
      &:hover {
        color:  $fg_color;
        @include button(hover, $edge: none);
        border-width: 2px;
        background-image: none;
        box-shadow: none;
      }
      &:active {
        @include button(active, $edge: none);
        border-width: 2px;
      }
      &:backdrop, &:backdrop:hover {
        color: transparentize($backdrop_fg_color,0.7);
        border-color: transparent;
        border-width: 2px;
      }
      & > image { // this is a hack which makes tabs grow
        padding: 2px;
      }
    }
  }
}

//.notebook > .frame,
//.notebook > .view { border: none; }

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

scrollbar {
  background-clip: padding-box;
  background-image: none;
  border-style: solid;
  -GtkRange-trough-border: 0;
  -GtkScrollbar-has-backward-stepper: false;
  -GtkScrollbar-has-forward-stepper: false;
  -GtkRange-slider-width: 20;
  -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;

  trough { @extend junction; }

  $_slider_margin: 3px;
  $_slider_fine_tune_margin: 4px;

  button {
    border: none;
  }
  & slider {
    border-radius: 20px;
    border: 5px solid transparent; //margin
    background-color: mix($bg_color, $fg_color, 50%);
    &:backdrop, &:insensitive {
      background-color: mix($bg_color, $fg_color, 90%);
    }
    &:hover {
      background-color: mix($bg_color, $fg_color, 30%);
    }
    &:prelight:active {
      background-color: $selected_bg_color;
    }
    &.fine-tune {
      border-width: 8px;
      &:prelight:active {
        background-color: $selected_bg_color;
      }
    }
  }
  &.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 white;
        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; }
  }
}


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

GtkSwitch {
    -GtkSwitch-slider-width: 47px;
    -GtkSwitch-slider-height: 28px;
}

switch {
    font: bold condensed 9;
    outline-offset: -4px;
    // similar to the .scale
    border-width: 1px;
    border-style: solid;
    border-radius: 3px;
    border-color: $borders_color;
    background-color: mix($bg_color,$borders_color,60%);
    box-shadow: inset 0 1px transparentize(black, 0.9); /*outset not working*/
    text-shadow: 0 1px transparentize(black, 0.9);
    &:active {
        color: white;
        border-color: $selected_borders_color;
        background-color: $selected_bg_color;
        text-shadow: 0 0 2px white;
    }
    &:insensitive {
        color: $insensitive_fg_color;
        border-color: $borders_color;
        background-color: $insensitive_bg_color;
        text-shadow: none;
    }
    &:backdrop {
        color: $backdrop_fg_color;
        border-color: $backdrop_borders_color;
        background-color: $backdrop_bg_color;
        box-shadow: none;
        text-shadow: none;
        &:active {
          color: $selected_fg_color;
          border-color: $backdrop_borders_color;
          background-color: $backdrop_borders_color;
          box-shadow: none;
        }
        &:insensitive, &:insensitive:active {
          background-color: $insensitive_bg_color;
          color: $insensitive_fg_color;
          border-color: $insensitive_fg_color;
        }
    }
    & slider {
      border-radius: 3px;
      @include button(normal, $edge: none);
      box-shadow: inset 0 1px white,
                  inset 0 -2px transparentize($bg_color,0.4),
                  inset 0 -1px mix($bg_color,$borders_color,50%);
      &:hover {
        @include button(hover, $edge: none);
        box-shadow: inset 0 1px white,
                    inset 0 -2px transparentize($bg_color,0.4),
                    inset 0 -1px mix($bg_color,$borders_color,50%);
      }
      &:active { border-color: $selected_borders_color; }
      &:insensitive { @include button(insensitive, $edge: none); }
      &:backdrop { @include button(backdrop);
        &:active{ border-color: $backdrop_borders_color; }
        &:insensitive {
          @include button(backdrop-insensitive);
        }
      }
    }
}

/*************************
 * Check and Radio items *
 *************************/

// FIXME

GtkCheckButton.text-button, GtkRadioButton.text-button {
  // this is for a nice focus on check and radios text
  padding: 1px;
  outline-offset: 0;
}

@each $w,$a in ('check', 'checkbox'),
               ('radio','radio') {
  .#{$w} {
    color: $fg_color;
    background-image: none;
    -gtk-icon-source: -gtk-icontheme('#{$a}-symbolic');
    &:hover { color: mix($fg_color, $bg_color, 80%) }
    &:checked, &:active {
      -gtk-icon-source: -gtk-icontheme('#{$a}-checked-symbolic');
      &:insensitive {
        color: $insensitive_fg_color;
        &:backdrop { color: $insensitive_fg_color; }
      }
      &:backdrop { color: $backdrop_fg_color; }
    }
    &:insensitive {
      color: $insensitive_fg_color;
      &:backdrop { color: $insensitive_fg_color; }
    }
    &:inconsistent {
      -gtk-icon-source: -gtk-icontheme('#{$a}-mixed-symbolic');
    }
    &:backdrop {
      color: $backdrop_fg_color;
      &:selected { color: $backdrop_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;
  outline-offset: -9px;
  outline-radius: 4px;

  &.fine-tune {
    outline-offset: -7px;
    outline-radius: 6px;
    & trough {
      border-radius: 4px;
      margin: 8px;
    }
  }
  trough {
    slider {
      //FIXME: better gradient on the slider and hover state
      @include button(normal, $edge: none);
      border-radius: 50%;
      border-color: darken($borders_color,3%);
      &:hover {
        @include button(hover, $edge: none);
        border-color: darken($borders_color,3%);
        border-radius: 50%; // needed for double marks scales
      }
      &:insensitive {
        border-style: solid; // needed for double marks scales or they'll get
        border-radius: 50%;  // overridden
        background-image: none;
        box-shadow: none;
      }
      &:backdrop {
        border-style: solid; // needed for double marks scales or they'll get
        border-radius: 50%;  // overridden
        border-color: darken($backdrop_borders_color,3%);
        background-image: none;
        box-shadow: none;
      }
      &:backdrop:insensitive { @include button(backdrop-insensitive);}
      &:active {
        border: 1px solid darken($selected_borders_color,3%);
      }
    }
  }
  trough {
    margin: 10px;
    border-width: 1px;
    border-style: solid;
    border-radius: 3px;
    border-color: $borders_color;
    background-color: mix($bg_color,$borders_color,60%);
    box-shadow: inset 1px 1px transparentize(black, 0.9);
    &.highlight {
      border-color: $selected_borders_color;
      background-color: $selected_bg_color;
      &:backdrop {
         border-color: $insensitive_fg_color;
         background-color: $insensitive_fg_color;
         box-shadow: none;
      }
    }
    &:insensitive, &.hilight:insensitive {
      border-color: $insensitive_borders_color;
      background-color: $insensitive_bg_color;
    }
    &:backdrop {
      border-color: $backdrop_borders_color;
      background-color: mix($backdrop_bg_color,$borders_color);
      box-shadow: none;
    }
    &:backdrop:insensitive, .hilight:backdrop:insensitive {
      border-color: $insensitive_fg_color;
      background-color: $backdrop_bg_color;
    }
  }
}

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

//FIXME it's a wip ok?

progressbar {
  padding: 0;
  font-size: 83%;
  color: $fg_color;

  &:backdrop {
    color: $insensitive_fg_color;
  }

  trough {
    border-width: 1px;
    border-style: solid;
    border-radius: 3px;
    border-color: $borders_color;
    background-color: mix($borders_color,$bg_color, 35%);
    box-shadow: inset 1px 1px transparentize(black, 0.9);
    &:backdrop {
      border-color: $backdrop_borders_color;
      background-color: mix($backdrop_borders_color,$backdrop_bg_color, 35%);
      box-shadow: 0 1px transparentize(white,1);
    }
  }
  &.osd trough {
    background-color: transparent;
    box-shadow: none;
    border-width: 0;
    //FIXME: there is a margin on top
  }
}

// moving bit
progressbar progress {
  border-width: 1px;
  border-style: solid;
  border-radius: 3px;
  border-color: $selected_borders_color;
  background-color: $selected_bg_color;
  // I really prefer these flat w/o this shadow - Lapo
  box-shadow: inset 0 1px 0 transparentize($borders_edge,0.8);
  &.vertical {
    box-shadow: inset 1px 0 0 transparentize($borders_edge,0.8);
  }
  &:backdrop {
    border-color: $selected_bg_color;
    background-color: $selected_bg_color;
    box-shadow: none;
  }
  &.osd {
    border-width: 0;
    border-radius: 0;
    -GtkProgressBar-min-horizontal-bar-height: 2px; //FIXME still too tall
  }
}

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

GtkLevelBar {
  -GtkLevelBar-min-block-width: 34;
  -GtkLevelBar-min-block-height: 3;
}

GtkLevelBar.vertical {
  -GtkLevelBar-min-block-width: 3;
  -GtkLevelBar-min-block-height: 34;
}

levelbar {
  & trough {
    // FIXME: outset not working
    padding: 2px;
    border-radius: 3px;
    @include entry(normal);
    &:backdrop {
      @include entry(backdrop);
    }
  }
  &.horizontal.discrete block { margin: 0 1px; }
  &.vertical.discrete block { margin: 1px 0; }
  & block.filled.low {
    border-color: darken($warning_color,10%);
    background-color: $warning_color;
    &:backdrop { border-color: $warning_color; };
  }
  & block.filled.high {
    border-width: 1px;
    border-style: solid;
    border-color: darken($selected_bg_color,10%);
    background-color: $selected_bg_color;
    box-shadow: 0 1px transparentize(black, 0.9);
    border-radius: 1px;
    &:backdrop {
      border-color: $selected_bg_color;
      box-shadow: none;
    }
  }
  & block.filled.full {
    border-color: darken($success_color,10%);
    background-color: $success_color;
    &:backdrop { border-color: $success_color; }
  }
  & block.empty {
    border-width: 1px;
    border-style: solid;
    background-color: transparent;
    border-color: transparentize($fg_color,0.8);
    border-radius: 1px;
    box-shadow: none;
    &:backdrop { border-color: transparentize($backdrop_fg_color,0.85); }
  }
}

// catch all extend :)

%selected_items {
  background-color: $selected_bg_color;
  color: $selected_fg_color;
  outline-color: transparentize($selected_fg_color, 0.7);
  &:backdrop { background-color: $borders_color; color: $selected_fg_color; }
}

/**********
 * Frames *
 **********/
frame,
.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;
  }
}

placessidebar,
scrolledwindow {
  .frame { border-radius: 2px; }
  viewport.frame { // avoid double borders when viewport inside scrolled window
    border-style: none;
  }
  // This is used when content is touch-dragged past boundaries.
  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); }
    }
  }

  // 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);
    }
  }

  junction { // the small square between two scrollbars
    border-color: transparent;
    background-color: darken($bg_color, 5%);
    &:backdrop { background-color: transparent; }
  }

}

//vbox and hbox separators
separator {
  // always disable separators
  // -GtkWidget-wide-separators: true;
  color: $borders_color;

  // Font and File button separators
  GtkFileChooserButton &.vertical,
  button.font &.vertical {
    // always disable separators
    -GtkWidget-wide-separators: true;
  }
}

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

list {
  background-color: $base_color;
  border-color: $borders_color;
  &:backdrop {
    background-color: $backdrop_base_color;
    border-color: $backdrop_borders_color;
  }
  & row {
    padding: 2px;
  }
}

row.activatable,
row.activatable:backdrop,
row.activatable:backdrop:active,
row.activatable:backdrop:checked,
row.activatable:backdrop:insensitive,
row.activatable:backdrop:insensitive:active,
row.activatable:backdrop:insensitive:checked,
row.activatable:insensitive:active,
row.activatable: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
}

row {
  &.activatable {
    color: $fg_color;
    &:hover {
      background-color: mix($fg_color, $base_color, 5%);
    }
    &:active {
      box-shadow: inset 0 2px 2px -2px transparentize(black, 0.8);
    }
    &:selected {
      @extend %selected_items;
      background-color: $selected_bg_color;
      color: $selected_fg_color;
      &:active { box-shadow: inset 0 2px 3px -1px transparentize(black, 0.5); }
      &:hover {
        background-color: mix($fg_color, $selected_bg_color, 10%);
      }
      &:backdrop { background-color: $borders_color; }
      .button.flat { 
        color: $selected_fg_color;
        &:hover { color: $fg_color; }
        &:active { color: $selected_fg_color; }
      }
    }
  }
  .button.flat {
    color: $fg_color;
    &:active { color: $selected_fg_color; }
  }
}


// transition
row,
row.activatable {
  transition: all 300ms $ease-out-quad;
  &:hover { transition: none; }
}


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

.app-notification,
.app-notification.frame {
  padding: 10px;
  border-width: 0 1px 1px;
  border-style: solid;
  border-color: $borders_color;
  border-radius: 0 0 6px 6px;
  background-image: linear-gradient(to bottom, mix(black, $bg_color, 6%) 5%,
                              mix(black, $bg_color, 4%));
  // FIXME no space for outer shadow : box-shadow: 0 1px 1px rgba(0,0,0,.5);
  .button { padding: 6px; }
}

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

expander {
  & arrow {
    -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 *
 ***********/
calendar {
  border: 1px solid $borders_color;
  &:selected {
    @extend .view:selected;
  }
  &.button {
    @extend %undecorated_button;
    padding: 0 4px; //FIXME no effect on these pseudobuttons
    color: mix($fg_color, $base_color, 40%); //we need a dimmed stuff var
    &:hover {
      @extend %undecorated_button;
      color: $fg_color;
    }
    &:backdrop, &:backdrop:hover {
      @extend %undecorated_button;
      color: mix($backdrop_fg_color, $backdrop_base_color, 50%);
    }
  }
  &.view { border-radius: 2px; }
  &.header {
    background: linear-gradient(to bottom,
                                lighten($bg_color,2%),
                                darken($bg_color,2%));
    border-bottom-color: mix($borders_color,$bg_color,50%);
    &:backdrop {
      background-image: linear-gradient(to bottom, $backdrop_bg_color);
      border-bottom-color: mix($backdrop_borders_color,$backdrop_bg_color,50%);
    }
  }

  &:inconsistent, &:inconsistent:backdrop { color: gtkalpha(currentColor, 0.55); }
  &.highlight, &.highlight:backdrop { color: $fg_color; }
}

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

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

messagedialog { // Message Dialog styling
  .titlebar {
    border-style: none;
    box-shadow: inset 0 1px $borders_edge;
  }
  &.csd { // rounded bottom border styling for csd version
    // 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, $suggested_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);
            @extend %middle_button;
            &:insensitive {
              @include button(backdrop-insensitive);
              @extend %middle_button;
            }
          }
          &:insensitive {
            @include button(insensitive);
            @extend %middle_button;
          }
        }
      }
      &:first-child{ @extend %first_button; }
      &:last-child { @extend %last_button; }
    }
    %middle_button {
      border-right-style: none;
      border-bottom-style: none;
    }
    %last_button { border-bottom-right-radius: 7px; }
    %first_button {
      border-left-style: none;
      border-bottom-left-radius: 7px;
    }
  }
}

GtkFileChooserDialog {
  .dialog-action-box {
    border-top: 1px solid $borders_color;
    &:backdrop { border-top-color: $backdrop_borders_color; }
  }
}

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

.sidebar {
  border: none;
  &:backdrop {
    background-color: $bg_color;
  }

  &:selected {
    @extend %selected_items;
  }

  & > GtkScrolledWindow > .frame {
    border-right: 1px solid $borders_color;
    &:dir(rtl) {
      border-right: none;
      border-left: 1px solid $borders_color;
    }
  }
}

$_placesidebar_icons_opacity: 0.9;
placessidebar {
  & row {
    // Needs overriding of the GtkListBoxRow padding
    padding: 0px;
    // Using margins/padding directly in the SidebarRow
    // will make the animation of the new bookmark row jump
    & > revealer {
      padding: 4px 14px 4px 12px;
    }
    & image.sidebar-icon {
      opacity: $_placesidebar_icons_opacity; // dim the device icons
      &:dir(ltr) { padding-right: 8px; }
      &:dir(rtl) { padding-left: 8px; }
    }
    & label .sidebar-label {
      &:dir(ltr) { padding-right: 2px; }
      &:dir(rtl) { padding-left: 2px; }
    }
    @at-root button.sidebar-button { // @at-root needded to not change the specificity making button styling inheritance broken
                                    // so istead of "GtkPlacesSidebar.sidebar .sidebar-button.button" [specificity 0,0,3,1]
                                    // the extended selector ".sidebar-button.button" [specificity 0,0,2,0]

      &.image-button { padding: 5px; }

      @extend button.flat;
      border-radius: 100%;
      outline-radius: 100%;
      &:not(:hover):not(:active) > image,
      &:backdrop > image { opacity: $_placesidebar_icons_opacity };
    }
  }

  // this is for indicating which sidebar row generated a popover
  // see https://bugzilla.gnome.org/show_bug.cgi?id=754411
  .has-open-popup { @extend row.activatable:hover; }

  .view {

    color: $fg_color;
    background-color: transparent;

    separator,
    separator:backdrop { @extend separator; }

    .image { // icons color
      color: mix($fg_color, $bg_color, 70%);

      &:selected {
        color: mix($selected_fg_color, $selected_bg_color, 90%);
      }
    }

    &:selected {
      @extend %selected_items;
    }
  }
}

stacksidebar {
  & row {
    padding: 10px 4px;
    > label {
      padding-left: 6px;
      padding-right: 6px;
    }
    &.needs-attention > label {
      @extend %needs_attention;
      background-size: 6px 6px, 0 0;
    }
  }
}

/*********
 * Paned *
 *********/


paned {
  // 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;
  }
  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);
    &:backdrop {
      background-image: linear-gradient(to bottom, $backdrop_borders_color);
    }
  }
}

paned.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
  separator {
    background-color: transparent;
    border-style: none solid;
    border-color: $borders_color;
    border-width: 1px;
  }
  &.vertical separator { border-style: solid none;}
  separator:backdrop { border-color: $backdrop_borders_color; }
}

/**************
 * GtkInfoBar *
 **************/
infobar {
  border-width: 0;
  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 {
    @include button(normal, $selected_bg_color, $selected_fg_color, $edge: none);
    &:hover { @include button(hover, $selected_bg_color, $selected_fg_color, $edge: none); }
    &:active { @include button(active, $selected_bg_color, $selected_fg_color, $edge: none); }
    &:insensitive { @include button(insensitive, $selected_bg_color, $selected_fg_color, $edge: none); }
    &:backdrop { @include button(backdrop, $selected_bg_color, $selected_fg_color, $edge: none); }
    &:backdrop:insensitive { @include button(backdrop-insensitive, $selected_bg_color, $selected_fg_color, $edge: none); }
  }
  label:selected,
  label:selected:focus,
  label:selected:hover {
    background-color: lighten($selected_bg_color, 20%);
  }
}

/************
 * Tooltips *
 ************/

.tooltip {
  color: white;
  padding: 4px; /* not working */
  border-radius: 5px;
  background-color: transparentize(black,0.2);  //FIXME proper color
  text-shadow: 0 1px black;
//  border: 2px solid $borders_color; gnome shell style?
}

.tooltip * { //Yeah this is ugly
  padding: 4px;
  background-color: transparent;
  color: inherit; // just to be sure
}

/*****************
 * Color Chooser *
 *****************/

colorswatch {
  // This widget is made of two boxes one on top of the other, the lower box is colorswatch {} the other one
  // is colorswatch 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();

  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; }
  button.color > & { box-shadow: none; }

  // border rounding
  &.top {
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
  }
  &.bottom {
    border-bottom-left-radius: 5px;
    border-bottom-right-radius: 5px;
  }
  &.left, &:first-child:not(overlay), &:first-child:not(.top) > .overlay {
    border-top-left-radius: 5px;
    border-bottom-left-radius: 5px;
  }
  &.right, &:last-child:not(overlay), &:last-child:not(.bottom) > .overlay {
    border-top-right-radius: 5px;
    border-bottom-right-radius: 5px;
  }
  &:only-child:not(overlay), &:only-child > overlay { border-radius: 5px; }
  // nth-child is used for the custom colors row.
  // 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+.

  // hover effect
  &.activatable:hover,
  &.activatable: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 transparentize(black, 0.6);
  }
  &:backdrop,
  &:backdrop:selected {
    background-image: none;
    box-shadow: none;
  }

  // indicator and keynav outline colors, color-dark is a color with luminosity lower then 50%
  &.dark {
    color: white;
    outline-color: transparentize(black, 0.7);
    &:backdrop { color: transparentize(white, 0.7); }
  }
  &.light {
    color: black;
    outline-color: transparentize(white, 0.5);
    &:backdrop { color: transparentize(black, 0.7); }
  }

  // border color
  & overlay,
  & overlay:selected {
    border: 1px solid $borders_color;
    &:hover { border-color: black; }
  }

  // make the add color button looks like, well, a button
  &#add-color-button {
    @include button(normal);
    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
    box-shadow: none;
    &:hover { @include button(hover); }
    &:backdrop { 
      @include button(backdrop); 
      border-width: 1px;
      color: $insensitive_fg_color; 
    }
    overlay { 
      @include button(undecorated);
      border-width: 0; } // reset the overlay to not 
                         // cover the button style underneat
  }
}


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

decoration {
  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: transparentize(black, 0.77);
  $_wm_border_backdrop: transparentize(black, 0.82);

  box-shadow: 0 3px 9px 1px transparentize(black, 0.5),
              0 0 0 1px $_wm_border; //doing borders with box-shadow

  /* this is used for the resize cursor area */
  margin: 10px;

  &:backdrop {
    box-shadow: 0 2px 6px 2px transparentize(black, 0.8),
                0 3px 9px 1px transparent,
                0 0 0 1px $_wm_border_backdrop;
  }
  &.tiled {
    border-radius: 0;
  }
  &.csd {
    &.popup {
      border-radius: 0;
      box-shadow: 0 1px 2px transparentize(black, 0.8),
                  0 0 0 1px transparentize($_wm_border,0.1);
    }
    &.tooltip {
      border-radius: 5px;
      box-shadow: none;
    }
  }
  &.solid-csd {
    border-radius: 0;
    margin: 4px;
    background-color: $backdrop_bg_color;
    border: solid 1px $backdrop_borders_color;
    box-shadow: none;
  }
}

// Window Close button
button.titlebutton {
  padding: 8px;
  border-color: transparent;
  background-image: none;
  transition-property: border, box-shadow, color;
  box-shadow: inset 0 1px transparentize(white,1),
              0 1px transparentize($borders_edge,1);
  &:hover { @include button(normal); }
  &:active { @include button(active); }
  &:backdrop {
    @include button(backdrop);
    border-color: transparent;
    transition-property: border, box-shadow, color;
  }
}

/**********************
 * Touch Copy & Paste *
 *********************/

//touch selection handlebars for the Popover.osd above
cursor-handle {
  background-color: $bg_color;
  background-image: none;
  -gtk-icon-source: none;
  box-shadow: none;
  outline-style: none;
  outline-color: transparent;
  border: 2px solid $fg_color;
  @each $s,$as in ('',''),
                  (':hover','-hover'),
                  (':active','-active') { //no need for insensitive and backdrop
                    &.top#{$s}:dir(ltr), &.bottom#{$s}:dir(rtl) {
                      border-radius: 10px 0 0 0;
                      padding-left: 10px;
                    }
                    &.bottom#{$s}:dir(ltr), &.top#{$s}:dir(rtl) {
                      border-radius: 0 10px 0 0;
                      padding-right: 10px;
                    }
                    &.insertion-cursor#{$s}:dir(ltr), &.insertion-cursor#{$s}:dir(rtl) {
                      border-radius: 10px 10px 0 0;
                    }
  }
}

/* Decouple the font of context menus from their entry/textview */
.context-menu {
  font: initial;
}

.touch-selection {
  font: initial;
  color: $osd_fg_color;
  border: none;
  background-color: opacify($osd_bg_color,0.2);
  background-clip: padding-box;
  outline-color: transparentize($osd_fg_color, 0.7);
  box-shadow: none;
  text-shadow: 0 1px black;
  -gtk-icon-shadow: 0 1px black;
  &:backdrop { text-shadow: none; }
  button {
    @include button(osd);
    &:hover { @include button(osd-hover); }
    &:active, &:checked { @include button(osd-active); }
    &:insensitive, &:backdrop:insensitive { @include button(osd-insensitive); }
    &:backdrop { @include button(osd-backdrop); }
  }
  // checkboxes and radios to use the -dark style for OSD style popovers
  @each $w,$a in ('check', 'checkbox'),
                 ('radio','radio') {
    @each $s,$as in ('','-unchecked'),
                  (':hover', '-unchecked-hover'),
                  (':active', '-unchecked-active'),
                  (':insensitive','-unchecked-insensitive'),
                  (':inconsistent', '-mixed'),
                  (':inconsistent:hover', '-mixed-hover'),
                  (':inconsistent:selected', '-mixed-active'),
                  (':inconsistent:insensitive', '-mixed-insensitive'),
                  (':checked', '-checked'),
                  (':checked:insensitive','-checked-insensitive'),
                  (':checked:hover', '-checked-hover'),
                  (':checked:active', '-checked-active'),
                  (':backdrop:checked', '-checked-backdrop') {
    .#{$w}#{$s} {
      -gtk-icon-shadow: none;
      color: $osd_fg_color; 
      }
    }
  }
}

