/* ============================================================
   VAULT · motion.css
   Reveals, cursor base, page-transition overlay, magnetic.
   La lógica avanzada vive en motion.js.
   ============================================================ */

/* ─── REVEALS — palabra/letra por palabra/letra ───────────── */
[data-reveal] .word,
[data-reveal] .char {
  display: inline-block;
  transform: translateY(110%);
  opacity: 0;
  will-change: transform, opacity;
  transition: transform var(--dur-cinematic) var(--ease-out-expo),
              opacity var(--dur-reg) var(--ease-out-expo);
}
[data-reveal] .word { white-space: pre; }
[data-reveal].is-revealed .word,
[data-reveal].is-revealed .char {
  transform: translateY(0);
  opacity: 1;
}

/* Block fade-in para elementos no-tipográficos */
[data-fade] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-reg) var(--ease-out-expo),
              transform var(--dur-reg) var(--ease-out-expo);
  will-change: transform, opacity;
}
[data-fade].is-revealed { opacity: 1; transform: translateY(0); }

/* ─── CUSTOM CURSOR ───────────────────────────────────────── */
.cursor-dot,
.cursor-blob {
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: var(--z-cursor);
  border-radius: 50%;
  transform: translate3d(-50%, -50%, 0);
  will-change: transform, width, height, background, opacity;
}
.cursor-dot {
  width: 4px; height: 4px;
  background: var(--text-primary);
  transition: background var(--dur-fast) var(--ease-out-quart),
              opacity var(--dur-fast) var(--ease-out-quart);
}
.cursor-blob {
  width: 40px; height: 40px;
  border: 1px solid var(--text-secondary);
  background: transparent;
  mix-blend-mode: difference;
  transition: width var(--dur-fast) var(--ease-out-quart),
              height var(--dur-fast) var(--ease-out-quart),
              background var(--dur-fast) var(--ease-out-quart),
              border-color var(--dur-fast) var(--ease-out-quart),
              opacity var(--dur-fast) var(--ease-out-quart);
  display: flex;
  align-items: center;
  justify-content: center;
}
.cursor-blob .cb-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: var(--ls-mono);
  text-transform: uppercase;
  color: var(--text-primary);
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease-out-quart);
}
.cursor-blob.is-link {
  width: 80px; height: 80px;
}
.cursor-blob.is-button {
  width: 100px; height: 100px;
  background: var(--accent);
  border-color: var(--accent);
  opacity: 0.4;
}
.cursor-blob.is-view {
  width: 96px; height: 96px;
  background: var(--bg);
  border-color: var(--text-primary);
  mix-blend-mode: normal;
  opacity: 1;
}
.cursor-blob.is-view .cb-label { opacity: 1; }
.cursor-blob.is-hidden { opacity: 0; }
@media (pointer: coarse) {
  .cursor-dot, .cursor-blob { display: none; }
}

/* ─── PAGE TRANSITION OVERLAY ─────────────────────────────── */
.page-transition {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: var(--z-page-transition);
  pointer-events: none;
  transform: translateY(100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-transition.is-covering {
  transition: transform 800ms var(--ease-in-out-quart);
  transform: translateY(0);
  pointer-events: auto;
}
.page-transition.is-uncovering {
  transition: transform 1000ms var(--ease-in-out-quart);
  transform: translateY(-100%);
  pointer-events: none;
}
.page-transition .pt-mark {
  font-family: var(--font-display);
  font-size: clamp(48px, 10vw, 140px);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-display);
  color: var(--text-primary);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-reg) var(--ease-out-expo) 200ms,
              transform var(--dur-reg) var(--ease-out-expo) 200ms;
}
.page-transition.is-covering .pt-mark {
  opacity: 1;
  transform: translateY(0);
}

/* ─── GRAIN OVERLAY — textura analógica permanente ────────── */
.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  mix-blend-mode: overlay;
  opacity: 0.04;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1   0 0 0 0 1   0 0 0 0 1   0 0 0 1 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  background-size: 240px 240px;
  will-change: background-position;
}

/* ─── BG ROOT TRANSITION — crossfade entre fondos al scroll ─ */
body { transition: background-color 600ms var(--ease-out-expo); }

/* ─── REVEAL STAGGER — cards en grid entran al viewport ──────
   Comunica: "el contenido carga progresivamente, hay más debajo".
   Hookeado por motion.js → initRevealStagger() vía data-reveal-stagger en
   el contenedor. Cada hijo recibe inline transition-delay. */
@media (prefers-reduced-motion: no-preference) {
  /* Progressive enhancement: opacity:0 SOLO si JS confirmó que initRevealStagger
     corrió (data-stagger-ready en <html>). Sin JS → cards visibles. */
  html[data-stagger-ready] [data-reveal-stagger] > * {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--dur-cinematic) var(--ease-out-expo),
                transform var(--dur-cinematic) var(--ease-out-expo);
    will-change: opacity, transform;
  }
  html[data-stagger-ready] [data-reveal-stagger].is-revealed > * {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── FORM STEP FADE — transición entre pasos del form ───────
   Comunica: "avanzaste / retrocediste un paso". Sin fade el cambio
   se siente abrupto. JS alterna .is-active-step / .is-hidden-step;
   el atributo `hidden` se conserva como fallback no-JS. */
@media (prefers-reduced-motion: no-preference) {
  fieldset[data-step].is-active-step,
  fieldset[data-step].is-hidden-step {
    transition: opacity var(--dur-reg) var(--ease-out-quart),
                transform var(--dur-reg) var(--ease-out-quart);
  }
  fieldset[data-step].is-active-step {
    display: block;
    opacity: 1;
    transform: translateY(0);
  }
  fieldset[data-step].is-hidden-step {
    opacity: 0;
    transform: translateY(16px);
    pointer-events: none;
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
  }
}
@media (prefers-reduced-motion: reduce) {
  fieldset[data-step].is-hidden-step { display: none; }
  fieldset[data-step].is-active-step { display: block; }
}

/* ─── REDUCED MOTION ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .cursor-dot, .cursor-blob { display: none; }
  [data-reveal] .word,
  [data-reveal] .char,
  [data-fade] { transform: none !important; opacity: 1 !important; }
  [data-reveal-stagger] > * { transform: none !important; opacity: 1 !important; }
  .grain { display: none; }
  .hairline-drift, .t-breathe, .cta-input-wrap::after { animation: none !important; }
}