body {
    margin: 0;
    overflow-x: hidden;
  }
  
  #burger-menu {
    cursor: pointer;
    height: 27px;
    width: 27px;
    overflow: visible;
    position: absolute;
    right: 0;
    z-index: 2;
  }
  #burger-menu span,
  #burger-menu span:before,
  #burger-menu span:after {
    background: #fff;
    display: block;
    height: 2px;
    opacity: 1;
    position: absolute;
    transition: 0.3s ease-in-out;
  }
  #burger-menu span:before,
  #burger-menu span:after {
    content: "";
  }
  #burger-menu span:before {
    left: 0px;
    top: -10px;
    width: 27px;
  }
  #burger-menu span {
    right: 0px;
    top: 13px;
    width: 27px;
  }
  #burger-menu span:after {
    left: 0px;
    top: 10px;
    width: 27px;
  }
  #burger-menu.close span:before {
    top: 0px;
    transform: rotate(90deg);
    width: 27px;
  }
  #burger-menu.close span {
    transform: rotate(-45deg);
    top: 13px;
    width: 27px;
  }
  #burger-menu.close span:after {
    top: 0px;
    left: 0;
    transform: rotate(90deg);
    opacity: 0;
    width: 0;
  }
  
  #menu {
    z-index: 1;
    min-width: 100%;
    min-height: 100%;
    position: fixed;
    top: 0;
    height: 0;
    visibility: hidden;
    opacity: 0;
    text-align: center;
    padding-top: 20px;
    transition: all 0.3s ease-in-out;
  }
  #menu.overlay {
    visibility: visible;
    opacity: 1;
    padding-top: 100px;
    background: rgba(0, 0, 0, 0.8);
  }
  #menu ul {
    padding: 0;
  }
  #menu li {
    list-style: none;
  }
  #menu a {
    color: #fff;
    display: block;
    font-size: 32px;
    margin-bottom: 20px;
    text-decoration: none;
  }