<form style="padding: 0 0.5rem;" class="d-flex align-items-center" action="{{ pathto('search') }}" method="get">
  <div style="width:100%;" class="textfield textfield-q textfield-size-m left-slot">
    <div class="slot left-slot-container">
      <span class="icon fas fa-search"></span>
    </div>
    <input 
      class="input input-quiet input-size-m" 
      type="search" 
      name="q" 
      id="search-input" 
      placeholder="{{ _(theme_search_bar_text) }}" 
      aria-label="{{ theme_search_bar_text }}" 
      autocomplete="off"
    >
  </div>
</form>