.mobile-nav__wrapper {
  position: fixed;
  top: 0;
  right: 0;
  width: 16rem; /* 64 = 256px */
  height: 100%;
  background: #e2e8f0;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 50;
}
.mobile-nav__wrapper.open {
  transform: translateX(0);
}

.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
  z-index: 40;
}
.mobile-nav__overlay.active {
  opacity: 1;
  visibility: visible;
}