WhiteSur-gtk-theme/src/sass/gtk/apps/_gnome-40.0.scss

/************
 * Nautilus *
 ************/

$nautilus_header_image: image($header_bg);
$nautilus_header_borders_image: image($header_border);
$nautilus_borders_color: if($variant=='light', darken(rgba($dark_sidebar_bg, 1), 12%), $header_border);
$flap_sidebar_size: 240px;

@if $nautilus_style == 'stable' {
  $nautilus_header_image: linear-gradient(90deg, $dark_sidebar_bg $flap_sidebar_size,
                                                 $nautilus_borders_color $flap_sidebar_size,
                                                 $nautilus_borders_color ($flap_sidebar_size + 1px),
                                                 $base_color ($flap_sidebar_size + 1px));

  $nautilus_header_borders_image: linear-gradient(90deg, transparent $flap_sidebar_size,
                                                         $header_border $flap_sidebar_size);
}

@if $nautilus_style == 'glassy' {
  $nautilus_header_image: linear-gradient(90deg, $dark_sidebar_bg ($flap_sidebar_size / 2),
                                                 $dark_header_bg 40%);

  $nautilus_header_borders_image: linear-gradient(90deg, rgba($header_border, 0) (($flap_sidebar_size / 2) - 40px),
                                                         $header_border 40%);
}

.nautilus-window {
  @if $nautilus_style == 'stable' or $nautilus_style == 'glassy' {
    &.background.csd {
      background-color: transparent;

      headerbar {
        background-color: transparent;
        border: none;
        background-image: $nautilus_header_image;
        border-image: $nautilus_header_borders_image 0 0 1 / 0px 0px 1px stretch;
      }
    }
  }

  @if $nautilus_style == 'stable' {
    headerbar {
      box.start > box {
        margin-left: 144px;
      }
    }
  }

  flap.unfolded {
    > placessidebar.background {
      background: none;

      list.navigation-sidebar {
        background-color: $dark_sidebar_bg;
      }
    }

    > separator.horizontal {
      background-color: $header_border;
    }
  }

  flap.folded {
    > placessidebar {
      border-right: 1px solid $header_border;
    }
  }

  // Floating Bar
  .floating-bar {
    padding: 2px;
    background-color: $selected_bg_color;
    color: $selected_fg_color;
    border-radius: $wm_radius - $container_padding;
    margin: $container_padding;
    box-shadow: $shadow_5;

    > button.circular.flat {
      border-radius: $circular_radius;
      min-height: 24px;
      min-width: 24px;
      padding: 0;
      -gtk-icon-shadow: none;
      @extend %selected-button;
    }
  }
}

#NautilusViewCell {
  clamp box {
    margin: 0;
    border-spacing: 0;
  }
}

#NautilusQueryEditor { // search entry
  padding: 1px $container_padding;

  > box { margin: 0; }

  #NautilusQueryEditorTag {
    @extend .entry-tag;

    > button {
      margin: 0;
    }
  }

  > menubutton > button {
    min-width: 16px;
    min-height: 16px;
    margin: 0;
    -gtk-icon-size: 12px;
    padding: 0 4px;
  }

  > text, > image { margin: 0; }
}

#NautilusPathBar {
  background-color: $fill_color;
  border-radius: $bt_radius;
  margin: $container_padding 0 $container_padding $container_padding;

  #NautilusPathButton {
    margin: 0 $container_padding / 2;
    border-radius: $bt_radius;

    &.current-dir {
      color: $header_fg;

      &:hover, &:active {
        background: none;
        box-shadow: none;
      }
    }

    &:first-child { margin-left: 0; }
  }

  > menubutton {
    margin-top: 0;
    margin-bottom: 0;
  }
}

// Extensions
window.nightthemeswitcher headerbar {
  background: $header_bg;
  color: $header_fg;
}

//
// Gnome Control Center
//

window.background.csd {
  > contents {
    > leaflet.unfolded > box {
      > headerbar {
        @extend %side_headerbar_left;
      }

      > searchbar {
        @extend %side_searchbar;
      }

      > stack > widget > box > widget > headerbar,
      > stack > widget > overlay > leaflet.folded > box > headerbar {
        @extend %side_headerbar_right;
      }

      > scrolledwindow > viewport > widget > stack {
        > list.navigation-sidebar {
          background-color: rgba($dark_sidebar_bg, 1);

          > separator {
            background-color: transparent;
            margin: 0;
            min-height: 0;
          }
        }

        > box > list.navigation-sidebar { background-color: rgba($dark_sidebar_bg, 1); }
      }

      > stack.background { background-color: $base_color; }
    }
  }
}


//
// Gnome Calendar / Gnome Contacts
//

window.background {
  > contents > toastoverlay > leaflet {
    > box {
      background-color: $base_color;

      > headerbar {
        &, &:backdrop {
          background: none;
          border: none;
        }
      }

      + separator {
        @extend %side_separator;

        + box {
          background-color: $dark_sidebar_bg;
        }
      }

      > .view, list:not(.boxed-list) {
        background-color: transparent;
      }

      list > row textview {
        padding: $container_padding;
        border-left: 1px solid $borders_color;

        &, & > text {
          background: none;
        }
      }
    }

    .current-week {
      background-color: $fill_color;
    }

    button.circular.day {
      border: none;
      box-shadow: none;
      @extend %flat_button;
    }

    datechooser navigator > button.flat.pill {
      padding: 0 $container_padding * 2;
      min-height: $menuitem_size;
      min-width: $menuitem_size;
    }
  }

  &.maximized, &.tiled {
    > contents > toastoverlay > leaflet {
      > box {
        > headerbar {
          &, &:backdrop {
            background: none;
            border: none;
          }
        }
      }
    }
  }
}

menubutton.flat.popup.sources-button {
  margin: 0;

  > button {
    margin: 0;
    border-radius: 0;
    padding: 0 $container_padding * 2;

    .title {
      font-size: small;
      font-weight: normal;
    }

    .title, .subtitle {
      padding: 2px 0 2px $container_padding;
    }

    image.calendar-color-image {
      -gtk-icon-size: 8px;
    }
  }
}

// Contacts
.contacts-editor-address {
  > entry.flat {
    &:not(:last-child) {
      box-shadow: inset 0 -1px $borders_color;
    }

    &:first-child {
      border-radius: $bt_radius $bt_radius 0 0;
    }

    &:last-child {
      border-radius: 0 0 $bt_radius $bt_radius;
    }
  }
}

//
// Calculator
//

.history-view { background-color: $base_color; }

.card {
  &.display-container {
    border: 1px solid $borders_color;
  }

  #displayitem {
    border-top: 1px solid $borders_color;
  }

  .small & {
    border-radius: 0;

    &.forecast-card {
      border-width: 1px 0;
    }

    &.display-container {
      border-width: 0 0 1px 0;
    }
  }
}