/* Motion system. Driven by IntersectionObserver in main.js — the script
   toggles `is-revealed` on elements with `data-reveal`. */

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: no-preference) {
  /* Only hide content when JS is alive — otherwise no-JS users see nothing. */
  html.js [data-reveal] {
    opacity: 0;
    transform: translateY(28px);
    transition:
      opacity 900ms var(--ease),
      transform 900ms var(--ease),
      filter 900ms var(--ease);
    filter: blur(4px);
    will-change: opacity, transform, filter;
  }
  html.js [data-reveal="fade"] { transform: none; filter: none; }
  html.js [data-reveal="left"] { transform: translateX(-40px); }
  html.js [data-reveal="right"] { transform: translateX(40px); }
  html.js [data-reveal="zoom"] { transform: scale(1.04); filter: blur(6px); }

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

  /* Staggered children: parent gets data-reveal-stagger, kids get data-reveal. */
  [data-reveal-stagger] > [data-reveal] { transition-delay: 0ms; }
  [data-reveal-stagger].is-revealed > [data-reveal]:nth-child(1) { transition-delay: 60ms; }
  [data-reveal-stagger].is-revealed > [data-reveal]:nth-child(2) { transition-delay: 160ms; }
  [data-reveal-stagger].is-revealed > [data-reveal]:nth-child(3) { transition-delay: 260ms; }
  [data-reveal-stagger].is-revealed > [data-reveal]:nth-child(4) { transition-delay: 360ms; }
  [data-reveal-stagger].is-revealed > [data-reveal]:nth-child(5) { transition-delay: 460ms; }
  [data-reveal-stagger].is-revealed > [data-reveal]:nth-child(6) { transition-delay: 560ms; }
  [data-reveal-stagger].is-revealed > [data-reveal]:nth-child(n+7) { transition-delay: 660ms; }
}

/* Hero choreography — entrance on first paint, parallax on scroll. */
@media (prefers-reduced-motion: no-preference) {
  html.js .hero__media img {
    transform: scale(1.08);
    transition: transform 2400ms var(--ease), opacity 1600ms var(--ease);
    opacity: 0.8;
  }
  html.js .hero.is-loaded .hero__media img {
    transform: scale(1);
    opacity: 1;
  }

  html.js .hero .eyebrow,
  html.js .hero__title,
  html.js .hero__lede,
  html.js .hero .btn,
  html.js .hero__meta-row {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 900ms var(--ease), transform 900ms var(--ease);
  }
  html.js .hero.is-loaded .eyebrow             { opacity: 1; transform: none; transition-delay: 200ms; }
  html.js .hero.is-loaded .hero__title         { opacity: 1; transform: none; transition-delay: 340ms; }
  html.js .hero.is-loaded .hero__lede          { opacity: 1; transform: none; transition-delay: 540ms; }
  html.js .hero.is-loaded .btn                 { opacity: 1; transform: none; transition-delay: 720ms; }
  html.js .hero.is-loaded .hero__meta-row:nth-child(1) { opacity: 1; transform: none; transition-delay: 600ms; }
  html.js .hero.is-loaded .hero__meta-row:nth-child(2) { opacity: 1; transform: none; transition-delay: 720ms; }
  html.js .hero.is-loaded .hero__meta-row:nth-child(3) { opacity: 1; transform: none; transition-delay: 840ms; }

  /* Letter-spacing intro on the hero title — luxe editorial reveal. */
  html.js .hero__title {
    letter-spacing: 0.04em;
  }
  html.js .hero.is-loaded .hero__title {
    letter-spacing: -0.02em;
    transition: opacity 900ms var(--ease), transform 900ms var(--ease), letter-spacing 1400ms var(--ease);
  }
}

/* Hover micro-interactions */
.btn {
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: currentColor;
  transform: translateY(100%);
  transition: transform var(--t-base) var(--ease);
  z-index: -1;
}
.btn:hover::before { transform: translateY(0); }
.btn__arrow { transition: transform var(--t-base) var(--ease); }
.btn:hover .btn__arrow { transform: translateX(6px); }

/* Gallery figure hover — image scale already in components.css, add a slow caption fade-in. */
.gallery figure {
  position: relative;
  background: var(--ink);
}
.gallery figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(10,10,10,0.55) 100%);
  opacity: 0;
  transition: opacity var(--t-base) var(--ease);
  pointer-events: none;
}
.gallery figure:hover::after { opacity: 1; }

/* Nav link underline */
.nav__link {
  position: relative;
  padding-bottom: 2px;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-base) var(--ease);
}
.nav__link:hover::after,
.nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* Image holder treatment — every figure image fades in once loaded */
img {
  transition: opacity var(--t-base) var(--ease), filter var(--t-base) var(--ease);
}
img[loading="lazy"]:not(.is-loaded) { opacity: 0; }
img.is-loaded { opacity: 1; }

/* Subtle parallax on hero media via CSS variable from JS. */
.hero__media {
  transform: translate3d(0, var(--parallax, 0px), 0);
  transition: transform 80ms linear;
}

/* Smooth focus rings */
:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}