.hamburger {
  display: block;
  width: 50px;
  height: 50px;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10000;
  padding: 12px;
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-tap-highlight-color: transparent;
  -ms-touch-action: manipulation;
  touch-action: manipulation;
}
.hamburger__icon {
  position: relative;
  margin-top: 7px;
  margin-bottom: 7px;
}
.hamburger__icon, .hamburger__icon:before, .hamburger__icon:after {
  display: block;
  width: 25px;
  height: 2px;
  background-color: #222;
  -moz-transition-property: background-color, -moz-transform;
  -o-transition-property: background-color, -o-transform;
  -webkit-transition-property: background-color, -webkit-transform;
  transition-property: background-color, transform;
  -moz-transition-duration: 0.4s;
  -o-transition-duration: 0.4s;
  -webkit-transition-duration: 0.4s;
  transition-duration: 0.4s;
}
.hamburger__icon:before, .hamburger__icon:after {
  position: absolute;
  content: "";
}
.hamburger__icon:before {
  top: -7px;
}
.hamburger__icon:after {
  top: 7px;
}
.hamburger.active .hamburger__icon {
  background-color: transparent;
}
.hamburger.active .hamburger__icon:before, .hamburger.active .hamburger__icon:after {
  background-color: #fff;
}
.hamburger.active .hamburger__icon:before {
  -moz-transform: translateY(7px) rotate(45deg);
  -ms-transform: translateY(7px) rotate(45deg);
  -webkit-transform: translateY(7px) rotate(45deg);
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active .hamburger__icon:after {
  -moz-transform: translateY(-7px) rotate(-45deg);
  -ms-transform: translateY(-7px) rotate(-45deg);
  -webkit-transform: translateY(-7px) rotate(-45deg);
  transform: translateY(-7px) rotate(-45deg);
}


@media (max-width:991px)  {
  .fat-nav {
    top: 0;
    left: 0;
    z-index: 9999;
    position: fixed;
    display: none;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    -moz-transform: scale(1.4);
    -ms-transform: scale(1.4);
    -webkit-transform: scale(1.4);
    transform: scale(1.4);
    -moz-transition-property: -moz-transform;
    -o-transition-property: -o-transform;
    -webkit-transition-property: -webkit-transform;
    transition-property: transform;
    -moz-transition-duration: 0.4s;
    -o-transition-duration: 0.4s;
    -webkit-transition-duration: 0.4s;
    transition-duration: 0.4s;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
  }
  .fat-nav__wrapper {
    width: 100%;
    height: 100%;
    display: table;
    table-layout: fixed;
  }
  .fat-nav.active {
    -moz-transform: scale(1);
    -ms-transform: scale(1);
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  .fat-nav ul {
    display: table-cell;
    vertical-align: middle;
    margin: 0;
    padding: 0;
  }
  .fat-nav li {
    list-style-type: none;
    text-align: center;
    padding: 10px;
    font-size: 2em;
  }
  .fat-nav li, .fat-nav li a {
    color: #fff;
  }
  .fat-nav li a {
    text-decoration: none;
  }
}