:host {
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  position: absolute;
  contain: layout size style;
  overflow: hidden;
  z-index: 0; }

.nav-decor {
  display: none; }

:host(.show-decor) .nav-decor {
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  display: block;
  position: absolute;
  background: #000;
  z-index: 0;
  pointer-events: none; }