/* ============================================================
   FonoKompass · Reveal & Loading
   Animações de entrada por IntersectionObserver e indicador
   de carregamento com bússola girando.
   ============================================================ */

/* === Reveal ============================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration-slower) var(--ease-out-expo),
              transform var(--duration-slower) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* === Loading global (bússola girando) ================== */
.loader {
  position: fixed;
  inset: 0;
  background: var(--color-navy);
  display: grid;
  place-items: center;
  z-index: 200;
  transition: opacity var(--duration-slow) var(--ease-out-expo);
}
.loader[hidden] { display: none; }
.loader.is-leaving { opacity: 0; pointer-events: none; }

.loader__compass {
  width: 96px;
  height: 96px;
  animation: loader-spin 2s linear infinite;
}
@keyframes loader-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .loader__compass { animation: none; }
}

/* === Botão "Carregar mais" com spinner =================== */
.btn--loading {
  pointer-events: none;
  position: relative;
}
.btn--loading > * { opacity: 0; }
.btn--loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: btn-spin 720ms linear infinite;
}
@keyframes btn-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .btn--loading::after { animation: none; }
}