.hamberger-btn {
position: fixed;
    top: 10px;
    right: 6px;
    width: 50px;
    height: 50px;
    display: block;
    z-index: 9999;
    transition: all 0.4s ease;
    overflow: hidden;
    background-color: #fff;
  }
  .hamberger-btn::after {
 width: 100%;
    position: absolute;
    left: 1px;
    bottom: 0;
    font-family: 'Noto Sans JP';
    content: "MENU";
    text-align: center;
    font-size: 12px;
    line-height: 22px;
    color: #003270;
    font-weight: 500;
  }
  .hamberger-btn span {
    width: 35px;
    height: 2px;
    position: absolute;
    top: 35%;
    transform: translate3D(-50%, -50%, 0);
    left: 50%;
    background: #003270;
  }
  .hamberger-btn span::before, .hamberger-btn span::after {
    width: 35px;
    height: 2px;
    position: absolute;
    left: 0;
    background: #003270;
    content: "";
  }
  .hamberger-btn span::after {
    top: -8px;
  }
  .hamberger-btn span::before {
    top: 8px;
  }
  .nav-header .sub-nav::before {
    display: none;
  }
  .navOpen .hamberger-btn {
    transform: rotate(360deg);
	  background-color: #003270;
  }
  .navOpen .hamberger-btn span {
    transform: rotate(140deg) translateX(20px);
    top: 5px;
    left: 46%;
    background: #fff;
  }
  .navOpen .hamberger-btn span::after {
    transform: rotate(-105deg) translateX(0px);
    top: 0;
    background: #fff;
  }
  .navOpen .hamberger-btn::after {
    content: "CLOSE";
    color: #fff;
  }
  .navOpen .hamberger-btn span::before {
    opacity: 0;
  }