ラベル付き・回転開閉式メニューボタン（中央配置・スマホ対応）

<div class="menu-wrapper">
  <button class="rotate-button" id="menu-toggle">MENU</button>
  <nav class="rotate-menu" id="rotate-menu">
    <a href="#">TOP</a>
    <a href="#">ABOUT</a>
    <a href="#">WORKS</a>
    <a href="#">CONTACT</a>
  </nav>
</div>

.menu-wrapper {
  position: relative;
  text-align: center;
  margin-top: 40px;
}
.rotate-button {
  background: #d60000;
  color: #fff;
  border: none;
  padding: 14px 22px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: transform 0.3s ease;
}
.rotate-button:hover {
  transform: rotate(2deg);
}
.rotate-menu {
  position: absolute;
  top: 60px;
  left: 50%;
  transform: translateX(-50%) scaleY(0);
  transform-origin: top;
  opacity: 0;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 9;
}
.rotate-menu a {
  background: #111;
  color: #fff;
  padding: 10px 16px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 0.9rem;
}
.rotate-menu a:hover {
  background: #d60000;
}
.rotate-menu.open {
  transform: translateX(-50%) scaleY(1);
  opacity: 1;
}

const toggleBtn = document.getElementById("menu-toggle");
const menu = document.getElementById("rotate-menu");

toggleBtn.addEventListener("click", () => {
  menu.classList.toggle("open");
});