display: flex;\n    -ms-flex-align: center;\n    align-items: center;\n    -ms-flex-pack: center;\n    justify-content: center;\n    width: auto;\n    padding-left: 0;\n  }\n  .form-inline .form-check-input {\n    position: relative;\n    -ms-flex-negative: 0;\n    flex-shrink: 0;\n    margin-top: 0;\n    margin-right: 0.25rem;\n    margin-left: 0;\n  }\n  .form-inline .custom-control {\n    -ms-flex-align: center;\n    align-items: center;\n    -ms-flex-pack: center;\n    justify-content: center;\n...

position: absolute;\n  top: 0;\n  bottom: 0;\n  z-index: 1;\n  // Use flex for alignment (1-3)\n  display: flex; // 1. allow flex styles\n  align-items: center; // 2. vertically center contents\n  justify-content: center; // 3. horizontally center contents\n  width: $carousel-control-width;\n  padding: 0;\n  color: $carousel-control-color;\n  text-align: center;\n  background: none;\n  border: 0;\n  opacity: $carousel-control-opacity;\n  @include transition($carousel-control-transition);\n\n  // Hover/focus...