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

.edit-gas-fee-button {
  display: flex;
  align-items: baseline;
  justify-content: flex-end;

  button {
    @include H7;

    display: flex;
    align-items: center;
    color: var(--color-primary-default);
    background: transparent;
    border: 0;
    padding-inline-end: 0;
    white-space: pre;
  }

  &__icon {
    font-size: 16px;
    margin-right: 2px;
  }

  &__label {
    font-size: 12px;
    margin-right: 4px;
  }

  .info-tooltip {
    align-self: center;
    margin-left: 6px;
  }

  &__tooltip {
    p {
      color: var(--color-text-alternative);
    }

    b {
      color: var(--color-text-default);
      display: inline-block;
      min-width: 60%;
    }
  }
}


// Overrides react-tippy

.tippy-tooltip .tippy-tooltip-content .edit-gas-fee-button__tooltip {
  min-width: 170px;
}