portainer/app/react/components/BoxSelector/BoxSelector.css

.boxselector_wrapper {
  display: flex;
  flex-flow: row wrap;
}

@media only screen and (max-width: 700px) {
  .boxselector_wrapper {
    flex-direction: column;
  }
}

.boxselector_wrapper input[type='radio']:checked + label,
.box-selector-item input[type='radio']:checked + label {
  background-color: var(--bg-blocklist-hover-color) !important;
  color: black !important;
  border-radius: 8px;
  border-color: var(--ui-blue-7);
  padding: 15px;
  box-shadow: none;
}

.boxselector_wrapper input[type='radio']:not(:disabled) + label,
.box-selector-item input[type='radio']:not(:disabled) + label {
  background: var(--ui-gray-2);
  color: var(--black-color) !important;
  border-radius: 8px;
  border-color: var(--ui-gray-5);
  padding: 15px;
  box-shadow: none;
}

.row.header {
  background-color: var(--bg-body-color) !important;
  margin-bottom: 5px !important;
}