<form role="search" method="get" class="ucla-main-nav__search-form" action="<?= home_url('/') ?>" id="menu-search-desktop">
  <label>
    <span class="ucla-main-nav__screen-reader-text visuallyhidden">Search for:</span>
    <input type="search" class="ucla-main-nav__search-field" placeholder="Search …" value="" name="s">
  </label>
  <input type="submit" class="ucla-main-nav__search-submit" value="Search">
</form>