@ionic/core/dist/collection/components/select/select.md.css

Base components for Ionic

:host {
  /**
   * @prop --padding-top: Top padding of the select
   * @prop --padding-end: Right padding if direction is left-to-right, and left padding if direction is right-to-left of the select
   * @prop --padding-bottom: Bottom padding of the select
   * @prop --padding-start: Left padding if direction is left-to-right, and right padding if direction is right-to-left of the select
   *
   * @prop --placeholder-color: Color of the select placeholder text
   * @prop --placeholder-opacity: Opacity of the select placeholder text
   */
  --placeholder-color: currentColor;
  --placeholder-opacity: 0.33;
  padding-left: var(--padding-start);
  padding-right: var(--padding-end);
  padding-top: var(--padding-top);
  padding-bottom: var(--padding-bottom);
  display: flex;
  position: relative;
  align-items: center;
  font-family: var(--ion-font-family, inherit);
  overflow: hidden;
  z-index: 2;
}
@supports (margin-inline-start: 0) or (-webkit-margin-start: 0) {
  :host {
    padding-left: unset;
    padding-right: unset;
    -webkit-padding-start: var(--padding-start);
    padding-inline-start: var(--padding-start);
    -webkit-padding-end: var(--padding-end);
    padding-inline-end: var(--padding-end);
  }
}

:host(.in-item) {
  position: static;
  max-width: 45%;
}

:host(.select-disabled) {
  opacity: 0.4;
  pointer-events: none;
}

:host(.ion-focused) button {
  border: 2px solid #5e9ed6;
}

.select-placeholder {
  color: var(--placeholder-color);
  opacity: var(--placeholder-opacity);
}

label {
  left: 0;
  top: 0;
  margin-left: 0;
  margin-right: 0;
  margin-top: 0;
  margin-bottom: 0;
  position: absolute;
  width: 100%;
  height: 100%;
  border: 0;
  background: transparent;
  cursor: pointer;
  appearance: none;
  outline: none;
  display: flex;
  align-items: center;
  opacity: 0;
}
[dir=rtl] label, :host-context([dir=rtl]) label {
  left: unset;
  right: unset;
  right: 0;
}

label::-moz-focus-inner {
  border: 0;
}

button {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  outline: 0;
  clip: rect(0 0 0 0);
  opacity: 0;
  overflow: hidden;
  -webkit-appearance: none;
  -moz-appearance: none;
}

.select-icon {
  position: relative;
  opacity: 0.33;
}

.select-text {
  flex: 1;
  min-width: 16px;
  font-size: inherit;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}

.select-icon-inner {
  left: 5px;
  top: 50%;
  margin-top: -2px;
  position: absolute;
  width: 0;
  height: 0;
  border-top: 5px solid;
  border-right: 5px solid transparent;
  border-left: 5px solid transparent;
  color: currentColor;
  pointer-events: none;
}
[dir=rtl] .select-icon-inner, :host-context([dir=rtl]) .select-icon-inner {
  left: unset;
  right: unset;
  right: 5px;
}

:host {
  --padding-top: 10px;
  --padding-end: 0;
  --padding-bottom: 10px;
  --padding-start: 16px;
}

.select-icon {
  width: 19px;
  height: 19px;
}

:host-context(.item-label-floating) .select-icon {
  transform: translate3d(0,  -9px,  0);
}