/* ---------------------------------------------------------------------------
   fw-motion — Wave 3 entrance/hover/scroll runtime styles.

   Loaded once globally on every page (public + editor iframe). Per-block
   CSS variables (--fw-anim-duration / --fw-anim-delay / --fw-anim-easing /
   --fw-sticky-top) are emitted by the style resolver so identical motion
   envelopes still dedupe.

   IMPORTANT
   - Only GPU-accelerated properties are animated: opacity, transform, filter.
   - prefers-reduced-motion disables every animation + transition globally.
   - All effects are opt-in via data-attributes / fw-hover-* classes; blocks
     without motion render identically to today.
--------------------------------------------------------------------------- */

/* ===========================================================================
   prefers-reduced-motion — hard kill switch.
   =========================================================================== */
@media (prefers-reduced-motion: reduce) {
  [data-fw-anim-entrance],
  [data-fw-anim-entrance][data-fw-state="pending"],
  [data-fw-anim-entrance][data-fw-state="in"],
  [class*="fw-hover-"],
  [data-fw-parallax-speed] {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    transition: none !important;
    animation: none !important;
  }
  .fw-progress-bar { display: none !important; }
}

/* ===========================================================================
   Entrance — pending (hidden) state.
   =========================================================================== */
[data-fw-anim-entrance][data-fw-state="pending"] {
  opacity: 0;
  will-change: opacity, transform, filter;
  /* default transform offset — overridden per type below */
}

[data-fw-anim-entrance="fade"][data-fw-state="pending"]        { transform: none; }
[data-fw-anim-entrance="fade-up"][data-fw-state="pending"]     { transform: translateY(var(--fw-anim-distance, 24px)); }
[data-fw-anim-entrance="fade-down"][data-fw-state="pending"]   { transform: translateY(calc(-1 * var(--fw-anim-distance, 24px))); }
[data-fw-anim-entrance="fade-left"][data-fw-state="pending"]   { transform: translateX(var(--fw-anim-distance, 24px)); }
[data-fw-anim-entrance="fade-right"][data-fw-state="pending"]  { transform: translateX(calc(-1 * var(--fw-anim-distance, 24px))); }
[data-fw-anim-entrance="scale-up"][data-fw-state="pending"]    { transform: scale(0.92); }
[data-fw-anim-entrance="zoom-in"][data-fw-state="pending"]     { transform: scale(0.85); }
[data-fw-anim-entrance="blur-in"][data-fw-state="pending"]     { filter: blur(8px); }
[data-fw-anim-entrance="slide-up"][data-fw-state="pending"]    { transform: translateY(calc(var(--fw-anim-distance, 24px) * 1.6)); }
[data-fw-anim-entrance="slide-down"][data-fw-state="pending"]  { transform: translateY(calc(-1.6 * var(--fw-anim-distance, 24px))); }
[data-fw-anim-entrance="slide-left"][data-fw-state="pending"]  { transform: translateX(calc(var(--fw-anim-distance, 24px) * 1.6)); }
[data-fw-anim-entrance="slide-right"][data-fw-state="pending"] { transform: translateX(calc(-1.6 * var(--fw-anim-distance, 24px))); }

/* Animated state — transition kicks in. */
[data-fw-anim-entrance][data-fw-state="in"] {
  opacity: 1;
  transform: none;
  filter: none;
  transition:
    opacity   var(--fw-anim-duration, 600ms) var(--fw-anim-easing, ease-out) var(--fw-anim-delay, 0ms),
    transform var(--fw-anim-duration, 600ms) var(--fw-anim-easing, ease-out) var(--fw-anim-delay, 0ms),
    filter    var(--fw-anim-duration, 600ms) var(--fw-anim-easing, ease-out) var(--fw-anim-delay, 0ms);
}

/* No-JS / no-data-state fallback: never leave a block invisible. */
[data-fw-anim-entrance]:not([data-fw-state]) { opacity: 1; transform: none; filter: none; }

/* ===========================================================================
   Intensity modifiers — affect the slide distance via custom prop.
   =========================================================================== */
.fw-anim-subtle { --fw-anim-distance: 12px; }
.fw-anim-medium { --fw-anim-distance: 24px; }
.fw-anim-strong { --fw-anim-distance: 48px; }

/* ===========================================================================
   Hover effects — declarative, transform / opacity / box-shadow only.
   =========================================================================== */
.fw-hover-lift,
.fw-hover-glow,
.fw-hover-scale,
.fw-hover-rotate,
.fw-hover-tilt,
.fw-hover-color-shift,
.fw-hover-shadow-grow {
  /* Establish a baseline transition so hover-out animates too. */
  transition: transform .2s ease, box-shadow .2s ease, color .2s ease, background-color .2s ease, filter .2s ease;
  /* Encourage GPU compositing while the hover surface is active. */
}

.fw-hover-lift:hover         { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(0,0,0,.08); }
.fw-hover-glow:hover         { box-shadow: 0 0 24px var(--token-color-brand-primary, rgba(0,61,165,.35)); }
.fw-hover-scale:hover        { transform: scale(1.03); }
.fw-hover-rotate:hover       { transform: rotate(-1.5deg); }
.fw-hover-tilt               { perspective: 800px; }
.fw-hover-tilt:hover         { transform: perspective(800px) rotateX(2deg) rotateY(-2deg); }
.fw-hover-color-shift:hover  { filter: hue-rotate(15deg) saturate(1.1); }
.fw-hover-shadow-grow:hover  { box-shadow: 0 24px 60px rgba(0,0,0,.15); }

/* Subtle/strong override the magnitude per hover type. */
.fw-hover-lift.fw-anim-subtle:hover   { transform: translateY(-2px); box-shadow: 0 6px 14px rgba(0,0,0,.06); }
.fw-hover-lift.fw-anim-strong:hover   { transform: translateY(-8px); box-shadow: 0 24px 48px rgba(0,0,0,.12); }
.fw-hover-scale.fw-anim-subtle:hover  { transform: scale(1.015); }
.fw-hover-scale.fw-anim-strong:hover  { transform: scale(1.06); }
.fw-hover-rotate.fw-anim-subtle:hover { transform: rotate(-0.75deg); }
.fw-hover-rotate.fw-anim-strong:hover { transform: rotate(-3deg); }

/* ===========================================================================
   Parallax — JS sets transform on each frame; this just hints compositing.
   =========================================================================== */
[data-fw-parallax-speed] {
  will-change: transform;
}

/* ===========================================================================
   Sticky block behaviour.
   =========================================================================== */
[data-fw-scroll-sticky] {
  position: sticky;
  top: var(--fw-sticky-top, 0);
  z-index: 5;
}

/* ===========================================================================
   Global page progress bar (renders behind the layout, fixed to viewport top).
   The JS appends a single .fw-progress-bar element when at least one block
   has data-fw-progress-bar="true".
   =========================================================================== */
.fw-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--token-color-brand-primary, #003DA5);
  width: 0;
  z-index: 100;
  transition: width .1s linear;
  pointer-events: none;
}