message: Fix vertical buttons in Alert for iOS
diff: height: 1px;
  right: 0;
  left: 0;
  - background: rgba(0, 0, 0, .12);
  + background: #e0e0e0;
  }
  .Alert--ios .Alert__content h2 {
  display: block;
  outline: none;
  }
  + .Alert--ios .Alert__btn:active {
  + z-index: 1;
  + }
  .Alert--ios .Alert__btn::after {
  content: '';
  position: absolute;
  left: 100%;
  width: 1px;
  height: auto;
  - background: rgba(0, 0, 0, .12);
  + background: #e0e0e0;
  }
  .Alert--ios .Alert__btn.Tappable--active::before,
  .Alert--ios .Alert__btn.Tappable--active::after {
  .Alert--ios.Alert--v .Alert__btn {
  margin: 0 0 1px;
  }
  + .Alert--ios.Alert--v .Alert__btn::after {
  + content: '';
  + position: absolute;
  + top: 100%;
  + right: 0;
  + left: 0;
  + width: 100%;
  + height: 1px;
  + background: #e0e0e0;
  + }
  .Alert--ios.Alert--v .Alert__btn:last-child {
  border-radius: 0 0 12px 12px;
  margin: 0;
  @media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi), (min-resolution: 2dppx) {
  .Alert--ios .Alert__content::after {
  - background: linear-gradient(to top, rgba(0, 0, 0, .12) 50%, #fafafa 50%);
  + background: linear-gradient(to top, #e0e0e0 50%, #fafafa 50%);
  }
  .Alert--ios.Alert--h .Alert__btn::after {
  - background: linear-gradient(to left, rgba(0, 0, 0, .12) 50%, #fafafa 50%);
  + background: linear-gradient(to left, #e0e0e0 50%, #fafafa 50%);
  }
  .Alert--ios.Alert--h .Alert__btn.Tappable--active::after {
  - background: linear-gradient(to left, rgba(0, 0, 0, .12) 50%, var(--ios-active-color) 50%);
  + background: linear-gradient(to left, #e0e0e0 50%, var(--ios-active-color) 50%);
  }
  .Alert--ios.Alert--h .Alert__btn:last-child::after {
  content: none;
  }
  + .Alert--ios.Alert--v .Alert__btn.Tappable--active::before,
  .Alert--ios.Alert--v .Alert__btn::after {
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  height: 1px;
  - background: linear-gradient(to top, rgba(0, 0, 0, .12) 50%, #fafafa 50%);
  + background: linear-gradient(to top, transparent 50%, #e0e0e0 50%);
  content: '';
  }
  + .Alert--ios.Alert--v .Alert__btn.Tappable--active::before {
  + top: auto;
  + bottom: 100%;
  + background: linear-gradient(to bottom, transparent 50%, #e0e0e0 50%);
  + }
  .Alert--ios.Alert--v .Alert__btn:last-child::after {
  content: none;
  }
  