metamask-extension/ui/components/app/edit-gas-fee-popover/index.scss

.edit-gas-fee-popover {
  height: 500px;

  &__wrapper {
    border-top: 1px solid var(--ui-grey);
  }

  &__content {
    padding: 16px 12px;

    & .error-message {
      margin-top: 0;
      margin-bottom: 12px;
    }

    &__header {
      color: var(--ui-4);
      font-size: 10px;
      font-weight: 700;
      margin: 0 12px;

      &-option {
        display: inline-block;
        width: 36%;
      }

      &-time {
        display: inline-block;
        width: 24%;
      }

      &-max-fee {
        display: inline-block;
        width: 30%;
      }
    }

    &__separator {
      border-top: 1px solid var(--ui-grey);
      margin: 8px 12px;
    }
  }

  &__network-status {
    margin-top: 36px;
  }

  &__know-more a {
    color: var(--primary-1);
  }
}