WhiteSur-gtk-theme/src/sass/gnome-shell/common/_search-results.scss

/* Search */

// search results sections "the boxes"
.search-section {
  // This should be equal to #searchResultsContent spacing
  spacing: $base_margin * 2;

  // separator
  .search-section-separator {
    height: 0;
    background-color: $light_divider_color;
  }
}

// content
.search-section-content {  // This is the space between the provider icon and the results container
  spacing: $base_margin * 2;
  border-radius: $bt_radius;
  padding: $base_padding * 3;
  border: none;
  box-shadow: none;
  background: $light_divider_color;
  text-shadow: none;
  color: $light_alt_fg_color;
}

// "no results" text
.search-statustext {
  @extend %status_text !optional;
}

//Icon tile
.list-search-result {
  &:focus, &:selected, &:hover {
    background-color: $light_divider_color;
    transition-duration: 200ms;
  }
  &:active, &:checked {
    background-color: $light_track_color;
  }
}

// search result provider
.search-provider-icon {
  // content
  .list-search-provider-content {
    spacing: 12px;

    // provider labels
    .list-search-provider-details {
      width: 120px;
      margin-top: 0;
      color: $light_hint_fg_color;
      // font-weight: bold;
    }
  }
}