.js [data-reveal] {
  opacity: 0;
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}
.js [data-reveal="up"] { transform: translateY(24px); }
.js [data-reveal="left"] { transform: translateX(-24px); }
.js [data-reveal="right"] { transform: translateX(24px); }
.js [data-reveal].revealed { opacity: 1; transform: none; }

.lang-menu {
  opacity: 0;
  transform: translateY(10px) scale(0.95);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.lang-menu.open {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

@media (max-width: 767.98px) {
  .mobile-panel {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s ease;
  }
  .mobile-panel.open { grid-template-rows: 1fr; }
  .mobile-panel > div { overflow: hidden; min-height: 0; }
  .mobile-panel:not(.open) { border-top-width: 0; box-shadow: none; }
}

@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
  .lang-menu, .mobile-panel { transition: none; }
}