Neobrutalism Selects Option groups

<label for="Headline">
      <span class="text-sm font-semibold"> Headliner </span>

      <select
        name="Headline"
        id="Headline"
        class="mt-0.5 w-full border-2 border-black shadow-[4px_4px_0_0] focus:ring-2 focus:ring-yellow-300 sm:text-sm"
      >
        <option value="">Please select</option>

        <optgroup label="A">
          <option value="AK">Albert King</option>
        </optgroup>

        <optgroup label="B">
          <option value="BBK">B.B King</option>
          <option value="BG">Buddy Guy</option>
        </optgroup>

        <optgroup label="E">
          <option value="EC">Eric Clapton</option>
        </optgroup>

        <optgroup label="J">
          <option value="JM">John Mayer</option>
          <option value="JH">Jimi Hendrix</option>
        </optgroup>

        <optgroup label="S">
          <option value="SRV">Stevie Ray Vaughn</option>
        </optgroup>
      </select>
    </label>