/* ==========================================================================
   animations.css — atmosphere and motion
   Everything here is decorative: the reduced-motion block at the bottom
   switches all of it off without breaking a single layout.
   ========================================================================== */

@keyframes fog-drift {
  0%   { transform: translateX(-6%) translateY(0) scale(1); }
  50%  { transform: translateX(6%) translateY(-2%) scale(1.08); }
  100% { transform: translateX(-6%) translateY(0) scale(1); }
}

@keyframes flicker {
  0%, 100% { opacity: 1; filter: drop-shadow(0 0 22px rgba(201, 162, 39, 0.45)); }
  42%      { opacity: 0.93; filter: drop-shadow(0 0 14px rgba(201, 162, 39, 0.3)); }
  47%      { opacity: 1; filter: drop-shadow(0 0 26px rgba(201, 162, 39, 0.55)); }
  55%      { opacity: 0.88; filter: drop-shadow(0 0 12px rgba(201, 162, 39, 0.28)); }
  62%      { opacity: 1; filter: drop-shadow(0 0 24px rgba(201, 162, 39, 0.48)); }
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.35; transform: scale(0.8); }
}

@keyframes bar-grow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes rise-in {
  from { opacity: 0; transform: translateY(16px) scale(0.985); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(14px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toast-out {
  to { opacity: 0; transform: translateX(24px); }
}

/* Test questions slide in from the direction of travel. */
@keyframes q-in-next {
  from { opacity: 0; transform: translateX(26px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes q-in-prev {
  from { opacity: 0; transform: translateX(-26px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes seal-in {
  0%   { opacity: 0; transform: scale(1.6) rotate(-16deg); }
  60%  { opacity: 0.9; transform: scale(0.94) rotate(-5deg); }
  100% { opacity: 0.72; transform: scale(1) rotate(-7deg); }
}

@keyframes score-glow {
  0%, 100% { text-shadow: 0 0 26px rgba(201, 162, 39, 0.3); }
  50%      { text-shadow: 0 0 46px rgba(226, 194, 104, 0.55); }
}

/* --------------------------------------------------------------------------
   Applied classes
   -------------------------------------------------------------------------- */
.anim-rise {
  animation: rise-in 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* Stagger children of a section as it appears. */
.anim-stagger > * {
  animation: rise-in 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.anim-stagger > *:nth-child(1) { animation-delay: 0.02s; }
.anim-stagger > *:nth-child(2) { animation-delay: 0.08s; }
.anim-stagger > *:nth-child(3) { animation-delay: 0.14s; }
.anim-stagger > *:nth-child(4) { animation-delay: 0.2s; }
.anim-stagger > *:nth-child(5) { animation-delay: 0.26s; }
.anim-stagger > *:nth-child(6) { animation-delay: 0.32s; }
.anim-stagger > *:nth-child(n + 7) { animation-delay: 0.38s; }

.anim-q-next { animation: q-in-next 0.34s cubic-bezier(0.22, 1, 0.36, 1) both; }
.anim-q-prev { animation: q-in-prev 0.34s cubic-bezier(0.22, 1, 0.36, 1) both; }
.anim-seal   { animation: seal-in 0.7s cubic-bezier(0.22, 1, 0.36, 1) both; }
.anim-glow   { animation: score-glow 3.6s ease-in-out infinite; }

/* Slow drift for the whole atmosphere layer on long pages. */
.anim-float {
  animation: fog-drift 40s ease-in-out infinite;
}

/* --------------------------------------------------------------------------
   Reduced motion — respect the system preference completely
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .atmos__fog,
  .atmos__dust {
    display: none;
  }
}