/* Hal-hal yang tidak praktis ditulis sebagai utility Tailwind. */

/* Utility display (mis. .flex) tidak boleh mengalahkan atribut hidden. */
[hidden] { display: none !important; }

.tanpa-scrollbar { scrollbar-width: none; }
.tanpa-scrollbar::-webkit-scrollbar { display: none; }

/* ---------- Kartu flip 3D ---------- */
.kartu-scene { perspective: 1200px; }

.kartu-tilt {
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transform-style: preserve-3d;
  transition: transform 0.2s ease-out;
}

.kartu-inner {
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.kartu.terbalik .kartu-inner { transform: rotateY(180deg); }

.kartu-muka {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.kartu-belakang { transform: rotateY(180deg); }

/* ---------- Kartu masuk & keluar ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px) scale(0.97);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.tampak {
  opacity: 1;
  transform: none;
}

.kartu.keluar {
  animation: keluar 0.3s ease-in forwards;
  pointer-events: none;
}

@keyframes keluar {
  to { opacity: 0; transform: scale(0.8) rotate(-4deg); }
}

/* ---------- Skeleton ---------- */
.shimmer {
  background: linear-gradient(100deg, #e7e5e4 30%, #f5f5f4 50%, #e7e5e4 70%);
  background-size: 200% 100%;
  animation: shimmer 1.4s linear infinite;
}

@keyframes shimmer {
  to { background-position: -200% 0; }
}

/* ---------- Hero ---------- */
.daun-melayang { animation: melayang 9s ease-in-out infinite; }

@keyframes melayang {
  0%, 100% { transform: translateY(0) rotate(-8deg); }
  50% { transform: translateY(-22px) rotate(10deg); }
}

/* ---------- Kuis ---------- */
.opsi.benar {
  border-color: #15803d;
  background: #dcfce7;
  color: #14532d;
  animation: denyut 0.5s ease;
}

.opsi.salah {
  border-color: #b91c1c;
  background: #fee2e2;
  color: #7f1d1d;
  animation: getar 0.4s ease;
}

@keyframes denyut {
  50% { transform: scale(1.04); }
}

@keyframes getar {
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

dialog[open] { animation: muncul 0.3s cubic-bezier(0.2, 0.8, 0.2, 1); }

@keyframes muncul {
  from { opacity: 0; transform: translateY(16px) scale(0.96); }
}

/* ---------- Toast ---------- */
.toast:not([hidden]) { animation: toast-naik 0.3s ease; }

@keyframes toast-naik {
  from { opacity: 0; transform: translate(-50%, 12px); }
}

/* ---------- Hormati preferensi pengguna ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  .reveal { opacity: 1; transform: none; }
}