wagtail/client/scss/components/_chooser.scss

$preview-size: 2.625rem; // 42px

.chooser {
  &.blank .chosen {
    display: none;
  }

  &:not(.blank) .unchosen {
    display: none;
  }
}

// Very subdued button style specifically for choosers, as there can be a lot of
// chooser fields left unused on a page editing form.
.button.chooser__choose-button {
  @apply w-label-3;
  display: flex;
  align-items: center;
  color: theme('colors.text-button-outline-default');
  border-color: transparent;
  padding: theme('spacing.[1.5]');

  .icon {
    @include svg-icon(theme('spacing.4'), initial);
    color: inherit;
    margin-inline-end: 5px;
  }

  &:hover,
  &:focus {
    color: theme('colors.surface-button-hover');
    background-color: theme('colors.surface-page');
  }
}

.chosen {
  display: flex;
  gap: theme('spacing.4');
  align-items: center;
}

.chooser__preview {
  display: grid;
  align-items: center;
  justify-content: center;
  width: $preview-size;
  height: $preview-size;
  // Prevent this item from getting smaller if the title is long.
  flex-shrink: 0;
  background-color: theme('colors.border-button-small-outline-default');
  color: theme('colors.text-button');
  border-radius: theme('borderRadius.sm');

  @media (forced-colors: active) {
    border: 1px solid transparent;
  }
}

.chooser__title {
  @apply w-body-text-large;
}

.chooser__image {
  max-width: 165px;
  max-height: 125px;
  height: auto;
  width: auto;
}

.chooser .w-dropdown__toggle--icon {
  width: $preview-size;
  height: $preview-size;
}

// Display these as inline block so that action icons such as comments can appear as close as possible
.w-field--admin_task_chooser,
.w-field--admin_page_chooser,
.w-field--document_chooser_widget,
.w-field--admin_image_chooser,
.w-field--admin_snippet_chooser {
  display: inline-block;
}