波打つように変形するハンバーガーアイコン

<div class="d03-08-05-frame">
          <div class="d03-08-05-bar">
            <span class="d03-08-05-logo">Studio</span>
            <button class="d03-08-05-burger" type="button" aria-label="メニューを開く" aria-expanded="false">
              <span></span><span></span><span></span>
            </button>
          </div>
          <nav class="d03-08-05-menu">
            <a href="#">作品集</a>
            <a href="#">プロフィール</a>
            <a href="#">ブログ</a>
            <a href="#">連絡先</a>
          </nav>
        </div>

.d03-08-05-frame{position:relative;width:100%;max-width:260px;height:210px;margin:0 auto;background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 10px 26px rgba(30,41,59,.14);border:1px solid #e5e7eb}
        .d03-08-05-bar{position:relative;z-index:4;display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid #eef2f7}
        .d03-08-05-logo{font-weight:800;font-size:13px;color:#be185d;letter-spacing:.02em}
        .d03-08-05-burger{position:relative;width:28px;height:28px;border:0;background:transparent;cursor:pointer;padding:0}
        .d03-08-05-burger span{position:absolute;left:4px;width:20px;height:2.4px;background:#1f2937;border-radius:2px;transition:transform .4s cubic-bezier(.34,1.4,.4,1),opacity .3s}
        .d03-08-05-burger span:nth-child(1){top:8px;transition-delay:0s}
        .d03-08-05-burger span:nth-child(2){top:14px;transition-delay:.07s}
        .d03-08-05-burger span:nth-child(3){top:20px;transition-delay:.14s}
        .d03-08-05-burger.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
        .d03-08-05-burger.open span:nth-child(2){opacity:0;transform:scaleX(.2)}
        .d03-08-05-burger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
        .d03-08-05-menu{position:absolute;left:0;right:0;top:57px;bottom:0;z-index:2;display:flex;flex-direction:column;gap:2px;padding:10px 16px;background:#fff;opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s}
        .d03-08-05-frame.open .d03-08-05-menu{opacity:1;visibility:visible}
        .d03-08-05-menu a{padding:10px 8px;color:#374151;text-decoration:none;font-size:13.5px;border-radius:8px;transition:background .15s,color .15s}
        .d03-08-05-menu a:hover{background:#fce7f3;color:#be185d}

(function(){
        var root=document.getElementById('item-03-08-05');
        var burger=root.querySelector('.d03-08-05-burger');
        var frame=root.querySelector('.d03-08-05-frame');
        burger.addEventListener('click',function(){
          var isOpen=frame.classList.toggle('open');
          burger.classList.toggle('open',isOpen);
          burger.setAttribute('aria-expanded',isOpen?'true':'false');
        });
      })();