.nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  display: none;
  width: 100vw;
  height: 100vh;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.5);
}

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

.nav-drawer-window {
  position: absolute;
  top: 0;
  right: 0;
  width: calc(100% - 64px);
  max-width: 320px;
  height: 100%;
  background: #fff;
}