.slide-menu {
  position: fixed;
  width: 320px;
  max-width: 100%;
  height: 100vh;
  top: 0;
  right: 0;
  display: none;
  overflow: hidden;
  box-sizing: border-box;
  background: #ddd;
  transition: -webkit-transform 300ms ease-in-out;
  transition: transform 300ms ease-in-out;
  transition: transform 300ms ease-in-out, -webkit-transform 300ms ease-in-out;
  -webkit-transform: translateX(100%);
  transform: translateX(100%);
  will-change: transform;
  z-index: 1000;
}

.slide-menu .slider {
  position: absolute;
  top: 60px;
  left: 0;
  width: 100%;
  transition: -webkit-transform 300ms ease-in-out;
  transition: transform 300ms ease-in-out;
  transition: transform 300ms ease-in-out, -webkit-transform 300ms ease-in-out;
  -webkit-transform: translateX(0);
  transform: translateX(0);
  will-change: transform;
}

.slide-menu ul {
  padding-left: 0;
  list-style: none;
  position: relative;
  width: 320px;
  max-width: 100%;
  margin: 0;
}

.slide-menu ul ul {
  position: absolute;
  top: 0;
  left: 100%;
  display: none;
}

.slide-menu ul a {
  display: block;
  padding: 12px 24px;
  color: #555
  ;
  text-decoration: none;
}

.slide-menu.no-transition, .slide-menu.no-transition * {
  transition: none !important;
}