/* =============================================================================
   ANIMATIONS.CSS — Keyframes, Scroll Reveal, Motion Preferences
   Traumatólogo GDL · Design System v1.2
   Load order: 3 of 4
   Requires: base.css
   ============================================================================= */

/* -----------------------------------------------------------------------
   KEYFRAMES
   ----------------------------------------------------------------------- */

/* Hero section entrance — CSS-only, no JS required */
@keyframes hero-fade-up {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-enter {
  animation: hero-fade-up 0.65s ease both;
}
.hero-enter-1 { animation-delay: 0.10s; }
.hero-enter-2 { animation-delay: 0.20s; }
.hero-enter-3 { animation-delay: 0.32s; }
.hero-enter-4 { animation-delay: 0.44s; }
.hero-enter-5 { animation-delay: 0.56s; }

/* Pulsing green dot on the hero badge */
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 3px rgba(99,255,132,0.30); }
  50%       { box-shadow: 0 0 0 7px rgba(99,255,132,0.08); }
}

/* Gentle vertical float for stat cards */
@keyframes float-card {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

/* -----------------------------------------------------------------------
   APPLIED ANIMATION RULES
   These piggyback on component selectors to attach the keyframes.
   ----------------------------------------------------------------------- */

.hero-badge-dot {
  animation: pulse-dot 2.2s ease-in-out infinite;
}

/* Stat cards float — async offsets create organic movement */
.stat-card {
  animation: float-card 4s ease-in-out infinite;
}

.stat-card:nth-child(2) { animation-delay: -1.3s; }
.stat-card:nth-child(3) { animation-delay: -2.6s; }
.stat-card:nth-child(4) { animation-delay: -0.7s; }

.stat-big {
  animation: float-card 4s ease-in-out infinite;
  animation-delay: -0.5s;
}

/* -----------------------------------------------------------------------
   SCROLL REVEAL — TRANSFORM ONLY, opacity never touched
   
   .reveal = always opacity:1, always visible.
   JS adds .will-animate to below-fold elements (shifts them down).
   JS adds .visible when they scroll into view (slides them up).
   In-viewport elements get .visible directly — no shift, no flash.
   ----------------------------------------------------------------------- */

@keyframes reveal-slide-up {
  from { transform: translateY(20px); }
  to   { transform: translateY(0);    }
}

/* Guaranteed baseline — NEVER hidden */
.reveal {
  opacity: 1;
  transform: none;
}

/* Below-fold only: shift down, ready to slide in (still visible) */
.reveal.will-animate {
  transform: translateY(20px);
}

/* Slide into place */
.reveal.will-animate.visible {
  animation: reveal-slide-up 0.5s ease forwards;
}

/* In-view elements skip will-animate entirely — no animation needed */
.reveal.visible:not(.will-animate) {
  transform: none;
}

/* Staggered delays — only apply if animating */
.reveal-delay-1.will-animate { animation-delay: 0.08s; }
.reveal-delay-2.will-animate { animation-delay: 0.16s; }
.reveal-delay-3.will-animate { animation-delay: 0.24s; }
.reveal-delay-4.will-animate { animation-delay: 0.32s; }
.reveal-delay-5.will-animate { animation-delay: 0.40s; }
.reveal-delay-6.will-animate { animation-delay: 0.48s; }

/* -----------------------------------------------------------------------
   REDUCED MOTION — WCAG 2.1 SC 2.3.3
   Disable all animation for users who prefer it.
   ----------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .hero-enter {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  /* Explicitly zero out named animations */
  .hero-badge-dot { animation: none; }
  .stat-card      { animation: none; }
  .stat-big       { animation: none; }

  /* Reveal elements — cancel animation, keep visible */
  .reveal,
  .reveal.visible {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}