/* Hamburger Menu Styles */
#menu {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 10;
    transform: translateX(-100%);
    visibility: hidden;
    opacity: 0;
    background-color: rgb(31, 41, 55);
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
    backdrop-filter: blur(10px);
    border-right: 1px solid rgba(255, 255, 255, 0.2);
  }
  
  #menu.open {
    transform: translateX(0);
    visibility: visible;
    opacity: 1;
  }
  
  #menu button {
    transition: background-color 0.2s ease;
    background-color: rgba(0, 0, 0, 0.1);
    margin: 2px;
    border-radius: 8px; /* 少し角を丸める */
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
    padding: 0.75rem 1rem;
    width: 100%;
    text-align: left;
    border: none;
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
  }
  
  #menu button:hover {
    background-color: rgba(55, 65, 81, 0.7);
  }
  
  /* Hamburger Menu Button */
  #menuButton {
    background-color: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    padding: 0.75rem; /* サイズを少し大きく */
    cursor: pointer;
    transition: background-color 0.2s ease;
  }
  
  #menuButton:hover {
    background-color: rgba(255, 255, 255, 0.2);
  }