/* styles/motion.css */
/* Five Dollar Down — Scroll reveals, nav scroll state, hero motion */
/* All animation is gated behind prefers-reduced-motion: no-preference. */

/* ─── Reduced-motion kill switch ─────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ─── Reveal on scroll ───────────────────────────────── */
/* Elements only start hidden once JS confirms it will reveal them
   (html.js-reveal) — no-JS users always see full content. */
@media (prefers-reduced-motion: no-preference) {
  .js-reveal [data-reveal] {
    opacity: 0;
    transform: translateY(var(--reveal-dist));
    transition:
      opacity   var(--reveal-dur) var(--ease-out),
      transform var(--reveal-dur) var(--ease-out);
    transition-delay: var(--reveal-delay, 0ms);
  }

  .js-reveal [data-reveal].is-revealed {
    opacity: 1;
    transform: none;
  }
}

/* ─── Nav scroll state ───────────────────────────────── */
/* Default .site-nav stays solid black (no-JS fallback).
   JS adds .is-top over the hero and .is-scrolled past it. */
.site-nav {
  transition:
    background    var(--t-base),
    border-color  var(--t-base);
}

.site-nav.is-top {
  background: transparent;
  border-bottom-color: transparent;
}

.site-nav.is-scrolled {
  background: var(--nav-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom-color: rgba(0, 212, 255, 0.35);
}

@supports not (backdrop-filter: blur(12px)) {
  .site-nav.is-scrolled {
    background: var(--c-black);
  }
}

/* ─── Hero scroll cue ────────────────────────────────── */
.hero-scroll-cue {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(255, 255, 255, 0.7);
  line-height: 0;
  transition: color var(--t-fast);
}

.hero-scroll-cue:hover {
  color: var(--c-accent);
}

.hero-scroll-cue:focus-visible {
  outline: 2px solid var(--c-accent-lt);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.hero-scroll-cue svg {
  width: 30px;
  height: 30px;
}

@media (prefers-reduced-motion: no-preference) {
  .hero-scroll-cue {
    animation: cue-bounce 2s ease-in-out infinite;
  }

  @keyframes cue-bounce {
    0%, 100% { transform: translate(-50%, 0); }
    50%      { transform: translate(-50%, 8px); }
  }
}