.drawer {
  display: none;
}
.drawer__overlay {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: 200;
  opacity: 0;
  
  transition: opacity 0.3s;
  will-change: opacity;
  background-color: #000;

  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;      
}

.drawer__header {
  /* Optional */
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #ddd;
}

.drawer__close {
  /* Optional */
  margin: 0;
  padding: 0;
  border: none;
  background-color: transparent;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%0A%3Csvg width='15px' height='16px' viewBox='0 0 15 16' version='1.1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'%3E%3Cg id='Page-1' stroke='none' stroke-width='1' fill='none' fill-rule='evenodd'%3E%3Cg id='2.-Menu' transform='translate(-15.000000, -13.000000)' stroke='%23000000'%3E%3Cg id='Group' transform='translate(15.000000, 13.521000)'%3E%3Cpath d='M0,0.479000129 L15,14.2971819' id='Path-3'%3E%3C/path%3E%3Cpath d='M0,14.7761821 L15,-1.24344979e-14' id='Path-3'%3E%3C/path%3E%3C/g%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  margin-left: 1rem;
}

.drawer__wrapper {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  height: 100%;
  width: 100%;
  max-width: 320px;
  z-index: 9999;
  overflow: auto;
  
  transition: transform 0.3s;
  will-change: transform;
  background-color: #fff;
 
  display: flex;
  flex-direction: column; 

  -webkit-transform: translate3d(103%, 0, 0);
  transform: translate3d(103%, 0, 0); /* extra 3% because of box-shadow */ 
  
  -webkit-overflow-scrolling: touch; /* enables momentum scrolling in iOS overflow elements */

  /* Optional */
  box-shadow: 0 2px 6px #777;
}

.drawer__content {
  position: relative;
  overflow-x: hidden;
  overflow-y: auto;
  height: 100%;
  flex-grow: 1;
  /* Optional */
  padding: 1.5rem;
}

.drawer--left .drawer__wrapper {
  left: 0;
  right: auto;
  -webkit-transform: translate3d(-100%, 0, 0);
  transform: translate3d(-100%, 0, 0);
}

.drawer.is-active {
  display: block;
}

.drawer.is-visible .drawer__wrapper {
  -webkit-transform: translate3d(0, 0, 0);
  transform: translate3d(0, 0, 0);
}

.drawer.is-visible .drawer__overlay {
  opacity: 0.5;
}