horst3180_arc-theme/common/gtk-3.0/3.20/sass/_transparent_widgets.scss

//NemoWindow GtkEventBox { background-color: $bg_color; } // fixes nemo statusbar

//NemoWindow,
.nautilus-window {
  paned > separator {
    background-image: linear-gradient(to top, $dark_sidebar_border);

    &:dir(ltr) { margin-left: -1px; }
    &:dir(rtl) { margin-right: -1px; }
  }
}

filechooser paned > separator { background-image: linear-gradient(to top, $dark_sidebar_border); }

// Dark transparent sidebars
filechooser,
.nautilus-window {

  &.csd.background, placessidebar list { background-color: transparent; }

  placessidebar.sidebar {

    background-color: $dark_sidebar_bg;

    row.sidebar-row {
      border: none;
      color: $dark_sidebar_fg;

      .sidebar-icon { color: transparentize($dark_sidebar_fg, 0.4); }

      &.has-open-popup,
      &:hover { background-color: transparentize($dark_sidebar_fg, 0.85); }

      &:disabled {
        &, label, image { color: transparentize($dark_sidebar_fg, 0.6); }
      }

      &:selected.has-open-popup,
      &:selected, &:selected:hover, &:active:hover {
        @extend %selected_items;

        .sidebar-icon { color: inherit; }
      }

      &:not(:selected) button.sidebar-button {
        color: $dark_sidebar_fg;

        &:hover { @include button(osd-hover); }
        &:active { @include button(active); }

        &:not(:hover):not(:active) > image { opacity: 0.5 };
      }

      &.sidebar-new-bookmark-row {
        color: $selected_bg_color;

        .sidebar-icon { color: inherit; }
      }

      &:drop(active):not(:disabled) {
        &, label, .sidebar-icon { color: $drop_target_color; }

        &:selected {
          &, label, .sidebar-icon { color: $selected_fg_color; }
          background-color: $drop_target_color;
        }
      }
    }

    separator { background-color: transparent; }

    scrollbar { @extend %dark_sidebar_scrollbar }
  }

  &.maximized placessidebar.sidebar { background-color: opacify($dark_sidebar_bg, 1); }
}


//NemoWindow,
//MarlinViewWindow {
//
//  &.csd.background,
//  .source-list, .source-list.view, .source-list.view:hover { background-color: transparent; }
//
//  .sidebar, .source-list.sidebar.view {
//    background-color: $dark_sidebar_bg;
//
//    .view, row {
//      background-color: transparent;
//      color: $dark_sidebar_fg;
//
//      &.cell:selected {
//        background-color: $selected_bg_color;
//        color: $selected_fg_color;
//      }
//    }
//
//    &.frame {
//      color: $dark_sidebar_fg;
//    }
//
//    separator { color: transparent; }
//
//    scrollbar { @extend %dark_sidebar_scrollbar }
//  }
//  &.maximized .sidebar { background-color: opacify($dark_sidebar_bg, 1); }
//
//}

//NemoWindow.background > GtkGrid > paned > separator,
//MarlinViewWindow.background > GtkBox > paned > separator { background-color: $dark_sidebar_border }

filechooser {

  actionbar {
    color: $dark_sidebar_fg;
    background-color: $dark_sidebar_bg;
    border-color: if($variant =='light', darken($dark_sidebar_bg, 7%), darken($dark_sidebar_bg, 15%));

    button { @extend %dark_sidebar_button; }
    entry { @extend %dark_sidebar_entry; }

    @extend %osd_check_radio;

    label, combobox { color: $dark_sidebar_fg; }
  }
}

// Gedit
.gedit-bottom-panel-paned { background-color: $base_color; }

.gedit-document-panel {
  background-color: $dark_sidebar_bg;

  .maximized & { background-color: opacify($dark_sidebar_bg, 1); }

  row {
    color: $dark_sidebar_fg;
    background-color: transparentize($dark_sidebar_fg, 1);

    &:hover {
      background-color: transparentize($dark_sidebar_fg, 0.85);
    }
    &:active {
      color: $selected_fg_color;
      background-color: $selected_bg_color;

      button { color: $selected_fg_color; }
    }
    &:selected, &:selected:hover {
      color: $selected_fg_color;
      background-color: $selected_bg_color;
    }
    &:hover:not(:selected) button:active {
      color: $dark_sidebar_fg;
    }
  }
}

%dark_sidebar_button {
  @include button(osd);

  &:hover { @include button(osd-hover); }
  &:active, &:checked { @include button(osd-active); }
  &:disabled { @include button(osd-insensitive); }
}

%dark_sidebar_entry {
  @include entry(osd);

  &:focus { @include entry(osd-focus); }
  &:disabled { @include entry(osd-insensitive); }
}

%dark_sidebar_scrollbar {

  &.overlay-indicator:not(.dragging):not(.hovering) slider {
    background-color: lighten($dark_sidebar_fg, 15%);
    border: 1px solid transparentize(black, 0.7);
  }
  slider {
    background-color: transparentize(lighten($dark_sidebar_fg, 15%), 0.3);

    &:hover { background-color: lighten($dark_sidebar_fg, 20%); }

    &:hover:active { background-color: $selected_bg_color; }

    &:disabled {
      background-color: transparent;
    }
  }
  trough {
    background-color: transparentize(black, 0.8);
    border: none;
  }
}