.panel {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;

  overflow: auto;

  background: white;

  animation: var(--transition-duration) both ease;
}

.panel {
  transform: translate(100%); /* BiDi proof */
}

.panel-active {
  transform: translate(0);
}

.panel-hidden {
  display: none;
}