dots/usr/share/themes/Dracula/gtk-4.0/widgets/_file-chooser.scss

/****************
 * File chooser *
 ****************/
$_placesidebar_icons_opacity: 0.7;

placessidebar {
  > viewport.frame { border-style: none; }

  row {
    // Needs overriding of the GtkListBoxRow padding
    min-height: 36px;
    padding: 0px;

    // Using margins/padding directly in the SidebarRow
    // will make the animation of the new bookmark row jump
    > revealer { padding: 0 14px; }

    &:selected { color: $selected_fg_color; }

    &:disabled { color: $insensitive_fg_color; }

    &:backdrop {
      color: $backdrop_fg_color;

      &:selected { color: $backdrop_selected_fg_color; }

      &:disabled { color: $backdrop_insensitive_color; }
    }

    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 {
      @extend %button_basic.flat;

      @extend %button_selected.flat;

      min-height: 26px;
      min-width: 26px;
      margin-top: 3px;
      margin-bottom: 3px;
      padding: 0;
      border-radius: 100%;
      -gtk-outline-radius: 100%;

      &:not(:hover):not(:active),
      &:backdrop { > image { opacity: $_placesidebar_icons_opacity; }}
    }

    // in the sidebar case it makes no sense to click the selected row
    &:selected:active { box-shadow: none; }

    &.sidebar-placeholder-row {
      padding: 0 8px;
      min-height: 2px;
      background-image: image($drop_target_color);
      background-clip: content-box;
    }

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

    &:drop(active):not(:disabled) {
      color: $drop_target_color;
      box-shadow: inset 0 1px $drop_target_color,
                  inset 0 -1px $drop_target_color;

      &:selected {
        color: $selected_fg_color;
        background-color: $drop_target_color;
      }
    }
  }
}

placesview {
  .server-list-button > image {
    transition: 200ms $ease-out-quad;
    -gtk-icon-transform: rotate(0turn);
  }

  .server-list-button:checked > image {
    transition: 200ms $ease-out-quad;
    -gtk-icon-transform: rotate(-0.5turn);
  }

  row.activatable:hover { background-color: transparent; }

  // this selects the "connect to server" label
  > actionbar > revealer > box > label {
    padding-left: 8px;
    padding-right: 8px;
  }
}