/* PGK Web Motion v2: original progressive-enhancement primitives.
 * New in v2 (see references/efectos-catalogo.md): rise preset (measured
 * curve), grain, hover-fill dual label, frost nav, ticker, dither fallback. */

[data-pgk-motion] {
  --pgk-motion-delay: 0ms;
  --pgk-depth-y: 0px;
}

/* Content remains visible until JavaScript explicitly enables enhancement. */
.pgk-motion-active [data-pgk-motion="reveal"],
.pgk-motion-active [data-pgk-motion="mask"] {
  opacity: 0;
  transition:
    opacity 520ms cubic-bezier(0.22, 1, 0.36, 1) var(--pgk-motion-delay),
    transform 720ms cubic-bezier(0.16, 1, 0.3, 1) var(--pgk-motion-delay),
    clip-path 760ms cubic-bezier(0.16, 1, 0.3, 1) var(--pgk-motion-delay);
}

.pgk-motion-active [data-pgk-motion="reveal"] {
  transform: translate3d(0, 1.15rem, 0);
}

.pgk-motion-active [data-pgk-motion="mask"] {
  clip-path: inset(0 0 100% 0);
  transform: translate3d(0, 0.6rem, 0);
}

.pgk-motion-active [data-pgk-motion="reveal"].pgk-motion-in,
.pgk-motion-active [data-pgk-motion="mask"].pgk-motion-in {
  opacity: 1;
  clip-path: inset(0 0 0 0);
  transform: translate3d(0, 0, 0);
}

.pgk-motion-active [data-pgk-motion="depth"] {
  transform: translate3d(0, var(--pgk-depth-y), 0);
  will-change: transform;
}

/* v2: rise preset: measured reference curve, 800ms, 60px. */
.pgk-motion-active [data-pgk-motion="rise"] {
  opacity: 0;
  transform: translate3d(0, 60px, 0);
  transition:
    opacity 800ms cubic-bezier(0.48, 0.05, 0.35, 0.99) var(--pgk-motion-delay),
    transform 800ms cubic-bezier(0.48, 0.05, 0.35, 0.99) var(--pgk-motion-delay);
}

.pgk-motion-active [data-pgk-motion="rise"].pgk-motion-in {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

/* v2: film grain overlay: one static layer per page, never animated. */
.pgk-grain::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* v2: frost nav: slides in past threshold; bar is frosted glass. */
[data-pgk-frost] {
  transform: translate3d(0, -160px, 0);
  transition: transform 700ms cubic-bezier(0.48, 0.05, 0.35, 0.99);
}

[data-pgk-frost].pgk-frost-on {
  transform: translate3d(0, 0, 0);
}

.pgk-frost-bar {
  opacity: 0;
  transition: opacity 400ms ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  background: rgba(251, 250, 246, 0.9);
  border-bottom: 1px solid rgba(43, 43, 41, 0.06);
}

[data-pgk-frost].pgk-frost-on .pgk-frost-bar,
[data-pgk-frost].pgk-frost-on.pgk-frost-bar {
  opacity: 1;
}

@supports not ((backdrop-filter: blur(8px)) or (-webkit-backdrop-filter: blur(8px))) {
  .pgk-frost-bar { background: rgba(251, 250, 246, 0.97); }
}

/* v2: hover-fill button with dual label (copy must differ and be true). */
.pgk-hover-fill {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  display: inline-block;
}

.pgk-hover-fill .pgk-fill {
  position: absolute;
  left: 50%;
  bottom: -20%;
  width: 130%;
  aspect-ratio: 1 / 1;
  border-radius: 10000px;
  transform: translate(-50%, 0) scale(0);
  opacity: 0;
  transition:
    transform 650ms cubic-bezier(0.48, 0.05, 0.35, 0.99),
    opacity 300ms ease;
}

.pgk-hover-fill:hover .pgk-fill,
.pgk-hover-fill:focus-visible .pgk-fill {
  transform: translate(-50%, -42%) scale(1.5);
  opacity: 1;
}

.pgk-hover-fill .pgk-labels {
  position: relative;
  display: block;
  height: 1.25em;
  overflow: hidden;
}

.pgk-hover-fill .pgk-label-start,
.pgk-hover-fill .pgk-label-end {
  display: block;
  white-space: nowrap;
  transition: transform 500ms cubic-bezier(0.48, 0.05, 0.35, 0.99), opacity 350ms ease;
}

.pgk-hover-fill .pgk-label-end {
  position: absolute;
  left: 0;
  top: 100%;
}

.pgk-hover-fill:hover .pgk-label-start,
.pgk-hover-fill:focus-visible .pgk-label-start {
  transform: translateY(-110%);
  opacity: 0;
}

.pgk-hover-fill:hover .pgk-label-end,
.pgk-hover-fill:focus-visible .pgk-label-end {
  transform: translateY(-100%);
}

/* v2: vertical ticker: duplicate the track content for a continuous -50% loop.
 * The duplicated copy must carry aria-hidden="true". */
.pgk-ticker {
  position: relative;
  overflow: hidden;
}

.pgk-ticker::before,
.pgk-ticker::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1rem;
  z-index: 2;
  background: linear-gradient(var(--pgk-ticker-veil, #fbfaf6), transparent);
}

.pgk-ticker::before { top: 0; }
.pgk-ticker::after { bottom: 0; transform: rotate(180deg); }

.pgk-ticker-track {
  display: flex;
  flex-direction: column;
  animation: pgk-ticker-up var(--pgk-ticker-duration, 14s) linear infinite;
}

.pgk-ticker:hover .pgk-ticker-track { animation-play-state: paused; }

@keyframes pgk-ticker-up {
  to { transform: translateY(-50%); }
}

/* v2: static dot fallback when WebGL2 is unavailable. */
.pgk-dither-fallback {
  background-image: radial-gradient(rgba(43, 43, 41, 0.14) 1px, transparent 1.2px);
  background-size: 6px 6px;
}

@media (prefers-reduced-motion: reduce) {
  .pgk-motion-active [data-pgk-motion] {
    opacity: 1 !important;
    clip-path: none !important;
    transform: none !important;
    transition: none !important;
    will-change: auto !important;
  }

  /* v2: neutralise every non-essential enhancement. */
  [data-pgk-frost],
  [data-pgk-frost].pgk-frost-on {
    transform: none !important;
    transition: none !important;
  }

  .pgk-frost-bar { opacity: 1 !important; transition: none !important; }

  .pgk-hover-fill .pgk-fill { display: none; }

  .pgk-hover-fill .pgk-label-start,
  .pgk-hover-fill .pgk-label-end {
    position: static;
    transform: none !important;
    opacity: 1 !important;
    transition: none !important;
  }

  .pgk-ticker-track { animation: none !important; }
}