地域選択モーダル

<button class="d03-04-04-open" type="button">地域を選択</button>
        <div class="d03-04-04-overlay">
          <div class="d03-04-04-modal">
            <h4 class="d03-04-04-title">地域を選択してください</h4>
            <ul class="d03-04-04-list">
              <li>日本</li><li>United States</li><li>台湾</li><li>한국</li>
            </ul>
            <button class="d03-04-04-close" type="button">閉じる</button>
          </div>
        </div>

.d03-04-04{position:relative}
        .d03-04-04-open{padding:10px 18px;border:1px solid #d1d5db;border-radius:8px;background:#fff;
          color:#1f2937;font-size:14px;font-weight:700;cursor:pointer}
        .d03-04-04-overlay{position:absolute;inset:0;background:rgba(15,23,42,.5);
          display:flex;align-items:center;justify-content:center;
          opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s}
        .d03-04-04.is-open .d03-04-04-overlay{opacity:1;visibility:visible}
        .d03-04-04-modal{width:80%;max-width:220px;background:#fff;border-radius:10px;padding:18px;
          text-align:center;transform:scale(.9);transition:transform .2s ease}
        .d03-04-04.is-open .d03-04-04-modal{transform:scale(1)}
        .d03-04-04-title{margin:0 0 12px;font-size:13px;font-weight:700;color:#111827}
        .d03-04-04-list{list-style:none;margin:0 0 12px;padding:0;display:flex;flex-direction:column;gap:6px}
        .d03-04-04-list li{padding:7px;border-radius:6px;background:#f3f4f6;font-size:13px;color:#374151;cursor:pointer}
        .d03-04-04-list li:hover{background:#e0e7ff;color:#4338ca}
        .d03-04-04-close{border:none;background:#111827;color:#fff;padding:6px 16px;border-radius:16px;
          font-size:12px;cursor:pointer}

(function(){
        var root=document.querySelector('#item-03-04-04 .d03-04-04');
        root.querySelector('.d03-04-04-open').addEventListener('click',function(){root.classList.add('is-open');});
        root.querySelector('.d03-04-04-close').addEventListener('click',function(){root.classList.remove('is-open');});
        root.querySelectorAll('.d03-04-04-list li').forEach(function(li){
          li.addEventListener('click',function(){root.classList.remove('is-open');});
        });
      })();