.hamburger_wrapper {
    padding: 5px;
    z-index: 10;
  }

  #hamburger {
    width: 60px;
    height: 45px;
    position: relative;
    cursor: pointer;
    outline: none;

  }

  #hamburger span {
    display: block;
    position: absolute;
    height: 9px;
    width: 100%;
    background: #005af0;
    border-radius: 9px;
    opacity: 1;
    margin-top: 0;
    transform: rotate(0deg);
    transition: .5s ease-in-out;
  }

  #hamburger span:nth-child(1) {
    top: 0px;
    transform-origin: left center;
  }

  #hamburger span:nth-child(2) {
    top: 21px;
    transform-origin: left center;
  }

  #hamburger span:nth-child(3) {
    top: 42px;
    transform-origin: left center;
  }

  #hamburger.close span:nth-child(1) {
    transform: rotate(45deg);
  }

  #hamburger.close span:nth-child(2) {
    width: 0%;
    opacity: 0;
    transition: .1s;
  }

  #hamburger.close span:nth-child(3) {
    transform: rotate(-45deg);
  }

  #nav-menu {
    position: absolute;
    top: 60px;
    left: 0;
    height: calc(100vh - 60px);
    transform: translateX(-100vw);
    opacity: 0;
    z-index: 10;
    transition: transform .5s ease, opacity ease .2s;
  }

  #nav-menu.now-active {
    transform: translateX(0);
    transition: transform .5s ease, opacity ease .2s;
    opacity: 1;
    background-color: #eaeaea;
  }

  .nav-list {
    padding: 10px;
    list-style-type: none;
    font-size: 2em;
  }

  amp-story:amp-story-open .amp-hamburger-menu {
    display: none;
  }