/* ==========================================================================
   TEACHER LUPI — ANIMATIONS
   Keyframes, scroll-reveal, transitions. Respects prefers-reduced-motion.
   ========================================================================== */

/* --------------------------------------------------------------------------
   KEYFRAMES
   -------------------------------------------------------------------------- */
@keyframes blink {
  from, to { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes float-subtle {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(1deg); }
}

@keyframes slide-down {
  from { transform: translateY(-100%); }
  to { transform: translateY(0); }
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0) rotate(45deg); }
  40% { transform: translateY(-10px) rotate(45deg); }
  60% { transform: translateY(-5px) rotate(45deg); }
}

@keyframes toast-in {
  from { transform: translateX(120%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes toast-out {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(120%); opacity: 0; }
}

@keyframes loading-fill {
  from { width: 0%; }
  to { width: 100%; }
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes scale-in {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes accordion-open {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-border {
  0%, 100% { box-shadow: 12px 12px 0 var(--color-primary); }
  50% { box-shadow: 12px 12px 0 var(--color-accent); }
}

@keyframes shake {
  0% { transform: translate(-2px, -2px) rotate(0deg); }
  25% { transform: translate(-2px, -2px) rotate(-1.5deg); }
  50% { transform: translate(-2px, -2px) rotate(1.5deg); }
  75% { transform: translate(-2px, -2px) rotate(-0.5deg); }
  100% { transform: translate(-2px, -2px) rotate(0deg); }
}

/* --------------------------------------------------------------------------
   SCROLL REVEAL SYSTEM
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-reveal) var(--ease-smooth),
              transform var(--duration-reveal) var(--ease-smooth);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-reveal) var(--ease-smooth),
              transform var(--duration-reveal) var(--ease-smooth);
}

.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 400ms; }
.reveal-stagger.is-visible > *:nth-child(7) { transition-delay: 480ms; }
.reveal-stagger.is-visible > *:nth-child(8) { transition-delay: 560ms; }
.reveal-stagger.is-visible > *:nth-child(9) { transition-delay: 640ms; }

/* Scale variant */
.reveal--scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity var(--duration-reveal) var(--ease-smooth),
              transform var(--duration-reveal) var(--ease-bounce);
}

.reveal--scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Checklist animation */
.checklist-reveal .neo-checkbox {
  transition: var(--transition-bounce);
  transition-delay: inherit;
}

.checklist-reveal.is-visible .neo-checkbox {
  background: var(--color-primary);
  color: #fff;
}

/* Featured plan pulse */
.plan-card--featured.is-visible {
  animation: pulse-border 3s ease-in-out infinite;
}

/* --------------------------------------------------------------------------
   REDUCED MOTION — Accessibility
   -------------------------------------------------------------------------- */
/* @media (prefers-reduced-motion: reduce) { ... removido para forçar animações ... } */