/* ==========================================================================
   AMBITON GLOBAL GROUP — MOTION SYSTEM
   v1.0 · CSS scroll-driven (nativo) + utility classes
   --------------------------------------------------------------------------
   Estrategia híbrida:
   1. CSS keyframes + custom properties para easings premium
   2. CSS scroll-driven animations (Chrome 115+) con fallback JS
   3. JS (motion.js) activa primitives via IntersectionObserver
   4. GSAP solo para hero y pinned sections (carga diferida)

   Reglas inquebrantables:
   - prefers-reduced-motion: reduce → todas las animaciones a 0.01ms
   - Animaciones GPU (transform + opacity) — nunca top/left/width
   - will-change solo durante la animación, removido al terminar
   ========================================================================== */

:root {
  /* ─── Tokens de duración ─────────────────────────────────────────────── */
  --motion-instant:   100ms;   /* Hover micro-feedback */
  --motion-fast:      200ms;   /* Botones, links */
  --motion-base:      350ms;   /* Default UI */
  --motion-medium:    600ms;   /* Reveals on scroll */
  --motion-slow:      900ms;   /* Hero entrance */
  --motion-cinematic: 1400ms;  /* Pinned sections, parallax dramático */

  /* ─── Easing curves premium ─────────────────────────────────────────── */
  /* Inspiradas en Apple, Stripe, Linear */
  --ease-out-expo:    cubic-bezier(0.16, 1.00, 0.30, 1.00);   /* default reveals */
  --ease-out-quart:   cubic-bezier(0.25, 1.00, 0.50, 1.00);
  --ease-out-quint:   cubic-bezier(0.22, 1.00, 0.36, 1.00);
  --ease-in-out-quint: cubic-bezier(0.83, 0.00, 0.17, 1.00);  /* bidireccional */
  --ease-out-back:    cubic-bezier(0.34, 1.56, 0.64, 1.00);   /* subtle overshoot */
  --ease-spring:      cubic-bezier(0.43, 1.30, 0.50, 1.00);   /* bouncy CTA */
  --ease-linear:      linear;

  /* ─── Stagger delays para grids ──────────────────────────────────────── */
  --stagger-1: 60ms;
  --stagger-2: 120ms;
  --stagger-3: 180ms;
  --stagger-4: 240ms;
  --stagger-5: 300ms;
  --stagger-6: 360ms;
}


/* ==========================================================================
   1. KEYFRAMES BASE
   ========================================================================== */

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

@keyframes fade-up {
  from { opacity: 0; transform: translate3d(0, 24px, 0); }
  to   { opacity: 1; transform: translate3d(0, 0, 0); }
}

@keyframes fade-up-soft {
  from { opacity: 0; transform: translate3d(0, 12px, 0); }
  to   { opacity: 1; transform: translate3d(0, 0, 0); }
}

@keyframes fade-down {
  from { opacity: 0; transform: translate3d(0, -24px, 0); }
  to   { opacity: 1; transform: translate3d(0, 0, 0); }
}

@keyframes fade-left {
  from { opacity: 0; transform: translate3d(32px, 0, 0); }
  to   { opacity: 1; transform: translate3d(0, 0, 0); }
}

@keyframes fade-right {
  from { opacity: 0; transform: translate3d(-32px, 0, 0); }
  to   { opacity: 1; transform: translate3d(0, 0, 0); }
}

@keyframes scale-in {
  from { opacity: 0; transform: scale(0.94); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes blur-in {
  from { opacity: 0; filter: blur(8px); transform: translate3d(0, 16px, 0); }
  to   { opacity: 1; filter: blur(0);   transform: translate3d(0, 0, 0); }
}

@keyframes pulse-soft {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.6; }
}

@keyframes float {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50%      { transform: translate3d(0, -8px, 0); }
}

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


/* ==========================================================================
   2. UTILITY CLASSES — activadas via JS (data-anim="...")
   --------------------------------------------------------------------------
   Patrón de uso:
   <div data-anim="fade-up">...</div>      → motion.js le agrega .is-visible
   --------------------------------------------------------------------------
   Estado inicial: invisible. Estado final: visible cuando .is-visible aplica.
   ========================================================================== */

[data-anim] {
  opacity: 0;
  transition:
    opacity   var(--motion-medium) var(--ease-out-expo),
    transform var(--motion-medium) var(--ease-out-expo),
    filter    var(--motion-medium) var(--ease-out-expo);
  will-change: opacity, transform;
}

[data-anim="fade-in"]    { /* solo opacity */ }
[data-anim="fade-up"]    { transform: translate3d(0, 32px, 0); }
[data-anim="fade-down"]  { transform: translate3d(0, -32px, 0); }
[data-anim="fade-left"]  { transform: translate3d(40px, 0, 0); }
[data-anim="fade-right"] { transform: translate3d(-40px, 0, 0); }
[data-anim="scale-in"]   { transform: scale(0.94); }
[data-anim="blur-in"]    { filter: blur(10px); transform: translate3d(0, 16px, 0); }

[data-anim].is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
  filter: blur(0);
}

/* Stagger: aplicado al hijo con --stagger-i:N */
[data-anim-stagger] > [data-anim] {
  transition-delay: calc(var(--stagger-1) * var(--stagger-i, 0));
}


/* ==========================================================================
   3. CSS SCROLL-DRIVEN ANIMATIONS (NATIVO · Chrome 115+)
   --------------------------------------------------------------------------
   Cuando el navegador soporta animation-timeline: view(),
   delega al CSS y desactiva el JS observer (motion.js detecta soporte).
   ========================================================================== */

@supports (animation-timeline: view()) {
  html.has-css-scroll-timeline [data-anim] {
    /* Reset del estado inicial — la animación toma el control */
    opacity: initial;
    transform: initial;
    filter: initial;
    transition: none;
    will-change: auto;

    animation-timeline: view();
    animation-range: entry 0% entry 60%;
    animation-fill-mode: both;
  }

  html.has-css-scroll-timeline [data-anim="fade-in"]    { animation-name: fade-in; }
  html.has-css-scroll-timeline [data-anim="fade-up"]    { animation-name: fade-up; }
  html.has-css-scroll-timeline [data-anim="fade-down"]  { animation-name: fade-down; }
  html.has-css-scroll-timeline [data-anim="fade-left"]  { animation-name: fade-left; }
  html.has-css-scroll-timeline [data-anim="fade-right"] { animation-name: fade-right; }
  html.has-css-scroll-timeline [data-anim="scale-in"]   { animation-name: scale-in; }
  html.has-css-scroll-timeline [data-anim="blur-in"]    { animation-name: blur-in; }
}


/* ==========================================================================
   4. HOVER & FOCUS MICRO-INTERACTIONS
   ========================================================================== */

.hover-lift {
  transition:
    transform var(--motion-base) var(--ease-out-expo),
    box-shadow var(--motion-base) var(--ease-out-expo);
}
.hover-lift:hover {
  transform: translate3d(0, -4px, 0);
  box-shadow: var(--shadow-lg);
}

.hover-scale {
  transition: transform var(--motion-base) var(--ease-out-expo);
}
.hover-scale:hover { transform: scale(1.03); }

.hover-glow {
  transition: box-shadow var(--motion-base) var(--ease-out-expo);
}
.hover-glow:hover { box-shadow: var(--shadow-brand); }

/* Magnetic button base (motion.js hace el tracking del cursor) */
.is-magnetic {
  transition: transform var(--motion-base) var(--ease-spring);
  will-change: transform;
}
.is-magnetic > * {
  transition: transform var(--motion-base) var(--ease-spring);
}

/* Underline reveal (links premium) */
.link-reveal {
  position: relative;
  text-decoration: none;
}
.link-reveal::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--motion-base) var(--ease-out-expo);
}
.link-reveal:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}


/* ==========================================================================
   5. ANIMACIONES CONTINUAS (decorativas)
   ========================================================================== */

.anim-float    { animation: float 4s ease-in-out infinite; }
.anim-pulse    { animation: pulse-soft 2s ease-in-out infinite; }
.anim-shimmer  {
  background: linear-gradient(
    90deg,
    var(--color-neutral-100) 0%,
    var(--color-neutral-50) 50%,
    var(--color-neutral-100) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.6s var(--ease-linear) infinite;
}


/* ==========================================================================
   6. SCROLL PROGRESS BAR (barra superior — opcional)
   ========================================================================== */

.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 100%;
  transform-origin: 0 50%;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--color-brand-primary), var(--color-brand-accent));
  z-index: var(--z-toast);
  pointer-events: none;
}
@supports (animation-timeline: scroll()) {
  .scroll-progress {
    animation: scaleX-grow auto linear;
    animation-timeline: scroll(root);
  }
  @keyframes scaleX-grow {
    to { transform: scaleX(1); }
  }
}


/* ==========================================================================
   7. ACCESIBILIDAD · prefers-reduced-motion
   --------------------------------------------------------------------------
   Override duro: desactivamos TODO motion no esencial.
   Mantenemos solo opacity (no marea) y elementos esenciales.
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  /* Mostrar todo de inmediato — saltarse fade-up, scale-in, etc. */
  [data-anim] {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    transition: none !important;
  }

  .anim-float,
  .anim-pulse,
  .anim-shimmer,
  .scroll-progress {
    animation: none !important;
  }
}