/* ===== Preloader ===== */
#preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background-color: #191919;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#preloader.fade-out {
  opacity: 0;
  visibility: hidden;
}

/* ===== Fade in do conteúdo ===== */
main {
  animation: fadeIn 0.5s ease forwards;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}