themes/olivero/css/components/header-search-narrow.pcss.css
/**
 * @file
 * Header Search Narrow Block.
 */

@import "../base/media-queries.pcss.css";

.block-search-narrow {
  margin-inline: calc(-1 * var(--sp));
  margin-block-end: var(--sp2);
  background: var(--color--black);

  & .search-block-form {
    display: flex;
  }

  & .form-item {
    flex-grow: 1;
    margin: 0;
  }

  & .form-actions {
    margin: 0;
  }

  & input[type="search"] {
    width: calc(100% + var(--sp2));
    height: var(--sp3);
    padding-block: 0;
    padding-inline-start: var(--sp);
    padding-inline-end: var(--sp);
    transition: background-size 0.4s;
    color: var(--color--white);
    border: solid 1px transparent;
    background-color: transparent;
    background-image: linear-gradient(var(--color--primary-50));
    background-repeat: no-repeat;
    background-position: bottom left; /* LTR */
    background-size: 0% 5px;
    box-shadow: none;
    font-family: var(--font-serif);
    font-size: 16px;
    -webkit-appearance: none;

    &:focus {
      outline: solid 4px transparent;
      outline-offset: -4px;
      background-size: 100% 5px;
    }

    @media (--md) {
      height: var(--sp4);
      padding-inline-start: var(--sp2);
      padding-inline-end: var(--sp2);
    }
  }

  & .search-form__submit {
    position: relative;
    overflow: hidden;
    align-self: stretch;
    width: var(--sp3);
    height: auto;
    margin-block: 0;
    margin-inline-start: 0;
    margin-inline-end: 0;
    padding-block: 0;
    padding-inline-start: 0;
    padding-inline-end: 0;
    cursor: pointer;
    border-color: transparent;
    background-color: transparent;

    /*
      When in Windows high contrast mode, FF will not output either background
      images or SVGs that are nested directly within a <button> element, so we add a <span>.
    */
    & .icon--search {
      position: absolute;
      inset-block-start: 0;
      inset-inline-start: 0;
      display: block;
      width: 100%; /* Width of the SVG background image. */
      height: 100%;
      pointer-events: none;
      background-image: url("../../images/search--white.svg");
      background-repeat: no-repeat;
      background-position: center;
      background-size: auto;

      &::after {
        position: absolute;
        inset-block-end: 0;
        inset-inline-start: 0;
        width: 100%;
        height: 0;
        content: "";
        transition: transform 0.2s;
        transform: scaleX(0);
        transform-origin: left; /* LTR */
        border-block-start: solid 5px var(--color--primary-50);
      }

      @media (forced-colors: active) {
        background: buttontext;
        mask-image: url("../../images/search--white.svg");
        mask-repeat: no-repeat;
        mask-position: center;
      }
    }

    &:focus {
      outline: solid 4px transparent;
      outline-offset: -4px;
      box-shadow: none;

      & span::after {
        transform: scaleX(1);
      }
    }

    @media (--md) {
      width: 80px;
    }
  }

  /* 500px is the width of the primary nav at mobile. */
  @media (min-width: 500px) {
    margin-inline-start: 0;
    margin-inline-end: 0;
  }
}

body:not(.is-always-mobile-nav) .block-search-narrow {
  @media (--nav) {
    display: none;
  }
}

[dir="rtl"] .block-search-narrow {
  & input[type="search"] {
    background-position: bottom right;
  }

  & .search-form__submit .icon--search::after {
    transform-origin: right;
  }
}
