amis/scss/components/form/_input-group.scss

.#{$ns}InputGroup {
  display: inline-flex;
  flex-wrap: nowrap;

  &.#{$ns}Form-control--sizeXs,
  &.#{$ns}Form-control--sizeSm,
  &.#{$ns}Form-control--sizeMd,
  &.#{$ns}Form-control--sizeLg {
    display: inline-flex;
  }

  &-addOn,
  & .#{$ns}Form-control {
    display: inline-block;
    white-space: nowrap;
  }

  &-addOn {
    background: var(--InputGroup-addOn-bg);
    border: var(--InputGroup-addOn-borderWidth) solid
      var(--InputGroup-addOn-borderColor);
    line-height: calc(
      var(--InputGroup-height) - var(--InputGroup-paddingY) * 2 -
        var(--InputGroup-addOn-borderWidth) * 2
    );
    height: var(--InputGroup-height);
    box-sizing: border-box;
    padding: var(--InputGroup-paddingY) var(--InputGroup-paddingX);

    &:not(:last-child) {
      border-right: 0;
    }

    &:first-child {
      border-top-left-radius: var(--InputGroup-addOn-borderRadius);
      border-bottom-left-radius: var(--InputGroup-addOn-borderRadius);
    }

    &:last-child {
      border-top-right-radius: var(--InputGroup-addOn-borderRadius);
      border-bottom-right-radius: var(--InputGroup-addOn-borderRadius);
    }
  }

  &-btn {
    .#{$ns}Button {
      border-radius: 0;
      border: var(--InputGroup-button-borderWidth) solid
        var(--InputGroup-button-borderColor);
    }

    &:not(:last-child) .#{$ns}Button {
      border-right: 0;
    }

    &:first-child .#{$ns}Button {
      border-top-left-radius: var(--InputGroup-button-borderRadius);
      border-bottom-left-radius: var(--InputGroup-button-borderRadius);
    }

    &:last-child .#{$ns}Button {
      border-top-right-radius: var(--InputGroup-button-borderRadius);
      border-bottom-right-radius: var(--InputGroup-button-borderRadius);
    }
  }

  .#{$ns}TextControl-input {
    flex-basis: 0;
    flex-grow: 1;
    display: inline-flex;

    &:not(:first-child) {
      border-top-left-radius: 0;
      border-bottom-left-radius: 0;
    }

    &:not(:last-child) {
      border-right-width: 0;
      border-top-right-radius: 0;
      border-bottom-right-radius: 0;
    }
  }

  .#{$ns}SelectControl {
    .#{$ns}Select {
      background: var(--InputGroup-select-bg);
      border: var(--InputGroup-select-borderWidth) solid
        var(--InputGroup-select-borderColor);
      color: var(--InputGroup-select-color);
    }

    &:not(:last-child) .#{$ns}Select {
      border-right: 0;
    }

    &:first-child .#{$ns}Select {
      border-top-left-radius: var(--InputGroup-select-borderRadius);
      border-bottom-left-radius: var(--InputGroup-select-borderRadius);
    }

    &:last-child .#{$ns}Select {
      border-top-right-radius: var(--InputGroup-select-borderRadius);
      border-bottom-right-radius: var(--InputGroup-select-borderRadius);
    }

    &:not(:first-child) .#{$ns}Select {
      border-top-left-radius: 0;
      border-bottom-left-radius: 0;
    }

    &:not(:last-child) .#{$ns}Select {
      border-right-width: 0;
      border-top-right-radius: 0;
      border-bottom-right-radius: 0;
    }
  }

  .#{$ns}Select-arrow {
    color: var(--InputGroup-select-arrowColor);
  }

  &.is-focused {
    .#{$ns}InputGroup-addOn,
    .#{$ns}TextControl-input,
    .#{$ns}Select,
    .#{$ns}InputGroup-btn .#{$ns}Button {
      border-color: var(--InputGroup-addOn-onFocused-borderColor);
    }

    .#{$ns}Select {
      background: var(--InputGroup-select-onFocused-bg);
    }

    .#{$ns}Select {
      color: var(--InputGroup-select-onFocused-color);
    }

    .#{$ns}Select-arrow {
      color: var(--InputGroup-select-onFocused-arrowColor);
    }

    .#{$ns}InputGroup-addOn {
      color: var(--primary);
    }
  }
}

.#{$ns}InputGroup:not(.is-inline) {
  display: flex;
}