/* =====================================================================
   Hang Fa'ao Robotics — Animations
   Keyframes + scroll-reveal utility classes.
   Reveals are driven by IntersectionObserver in js/animations.js, which
   toggles the `.is-visible` class. Elements start hidden via [data-reveal].
   ===================================================================== */

/* ---------------------------------------------------------------------
   KEYFRAMES
   --------------------------------------------------------------------- */
@keyframes spin { to { transform: rotate(360deg); } }

@keyframes ripple {
  to { transform: scale(2.6); opacity: 0; }
}

@keyframes pulse-dot {
  0%   { box-shadow: 0 0 0 0 rgba(255,255,255,.5); }
  70%  { box-shadow: 0 0 0 10px rgba(255,255,255,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,255,255,0); }
}

@keyframes scroll-trail {
  0%   { top: -50%; }
  100% { top: 100%; }
}

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

@keyframes ping {
  0%   { transform: translate(-50%, -50%) scale(1);   opacity: 1; }
  100% { transform: translate(-50%, -50%) scale(4.5); opacity: 0; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-14px); }
}

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

/* ---------------------------------------------------------------------
   FLOATING ELEMENTS UTILITY
   --------------------------------------------------------------------- */
.float      { animation: float 6s var(--ease) infinite; }
.float--slow{ animation: float 9s var(--ease) infinite; }

/* ---------------------------------------------------------------------
   SCROLL REVEAL — base hidden state
   Each variant defines its own starting transform. `.is-visible` resets
   to the resting state with a smooth eased transition.
   --------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transition:
    opacity 0.9s var(--ease),
    transform 0.9s var(--ease),
    filter 0.9s var(--ease);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
  filter: none;
}

/* Variants */
[data-reveal="fade-up"]    { transform: translateY(38px); }
[data-reveal="fade-down"]  { transform: translateY(-32px); }
[data-reveal="fade"]       { transform: none; }
[data-reveal="slide-left"] { transform: translateX(48px); }
[data-reveal="slide-right"]{ transform: translateX(-48px); }
[data-reveal="scale"]      { transform: scale(0.92); }
[data-reveal="blur"]       { filter: blur(14px); opacity: 0; transform: scale(1.02); }

/* Text reveal (hero headline) — clip lines slide up */
[data-reveal="text"] > span {
  display: block;
  transform: translateY(110%);
  transition: transform 1s var(--ease);
  transition-delay: var(--reveal-delay, 0s);
}
[data-reveal="text"].is-visible > span { transform: translateY(0); }

/* Image reveal — a wiping overlay + subtle zoom (utility for future imagery) */
.image-reveal { position: relative; overflow: hidden; }
.image-reveal img { transform: scale(1.15); transition: transform 1.2s var(--ease); }
.image-reveal::after {
  content: ""; position: absolute; inset: 0; background: var(--c-black);
  transform-origin: right; transition: transform 1s var(--ease);
}
.image-reveal.is-visible img { transform: scale(1); }
.image-reveal.is-visible::after { transform: scaleX(0); transform-origin: left; }

/* ---------------------------------------------------------------------
   STAGGER HELPER
   Applied by JS to children of a [data-stagger] container.
   --------------------------------------------------------------------- */
[data-reveal][style*="--reveal-delay"] { /* delay handled inline by JS */ }

/* ---------------------------------------------------------------------
   NAV MOBILE PANEL TRANSITION (values here; layout in responsive.css)
   --------------------------------------------------------------------- */
.nav__links {
  transition:
    transform 0.55s var(--ease),
    opacity 0.4s var(--ease),
    visibility 0.4s var(--ease);
}

/* ---------------------------------------------------------------------
   REDUCED MOTION — respect user preference
   --------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; filter: none !important; }
  [data-reveal="text"] > span { transform: none !important; }
  .marquee__track { animation: none !important; }
  .hero__scroll-line::after,
  .hero__eyebrow .dot,
  .map__pin-pulse { animation: none !important; }
}