/* ============================================================
   MARZENA — Motion System · PRD §8
   Gate: html.js-motion (added by motion.js at boot).
   No JS → no class → every element 100% visible.
   prefers-reduced-motion: reduce → JS never adds html.js-motion
   ============================================================ */

/* ─── ① Block reveal — 650ms · --ease-marzena · 90ms stagger ─── */
html.js-motion .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity  var(--dur-standard, 650ms) var(--ease-marzena, cubic-bezier(0.22,1,0.36,1)),
    transform var(--dur-standard, 650ms) var(--ease-marzena, cubic-bezier(0.22,1,0.36,1));
  transition-delay: calc(var(--i, 0) * var(--stagger, 90ms));
}
html.js-motion .reveal.in {
  opacity: 1;
  transform: none;
}

/* ─── ② Editorial title mask — 1000ms · --ease-veil ─── */
.veil {
  overflow: hidden;
  padding-bottom: 0.12em;
  margin-bottom: -0.12em;
}
html.js-motion .veil-inner {
  display: block;
  transform: translateY(105%);
  transition: transform var(--dur-editorial, 1000ms) var(--ease-veil, cubic-bezier(0.16,1,0.3,1));
}
html.js-motion .veil.in .veil-inner {
  transform: none;
}

/* ─── ④ Navbar morph — 300ms · every page ─── */
.site-header {
  transition:
    background  300ms var(--ease-soft, cubic-bezier(0.4,0,0.2,1)),
    box-shadow  300ms var(--ease-soft, cubic-bezier(0.4,0,0.2,1));
}
.site-header .wrap {
  transition: height 300ms var(--ease-soft, cubic-bezier(0.4,0,0.2,1));
}
.site-header.scrolled {
  background: var(--vert-imperial);
  backdrop-filter: none;
  box-shadow: 0 1px 0 var(--line-gold), 0 4px 24px rgba(0,0,0,0.28);
}
.site-header.scrolled .wrap {
  height: 70px;
}
@media (max-width: 860px) {
  .site-header.scrolled .wrap { height: 62px; }
}

/* ─── ③ Corner draw-in — 700ms · homepage hero only ─── */
.hero.corners-armed .corner {
  transform: scale(0);
  transition: transform 700ms var(--ease-marzena, cubic-bezier(0.22,1,0.36,1));
}
.hero.corners-armed .corner.tl { transform-origin: top    left;  }
.hero.corners-armed .corner.tr { transform-origin: top    right; }
.hero.corners-armed .corner.bl { transform-origin: bottom left;  }
.hero.corners-armed .corner.br { transform-origin: bottom right; }
.hero.corners-draw  .corner.tl { transform: none; transition-delay:   0ms; }
.hero.corners-draw  .corner.tr { transform: none; transition-delay:  90ms; }
.hero.corners-draw  .corner.bl { transform: none; transition-delay: 180ms; }
.hero.corners-draw  .corner.br { transform: none; transition-delay: 270ms; }

/* ─── ⑤ bis — About portrait settle — 1000ms · --ease-veil ─── */
html.js-motion .about-portrait {
  opacity: 0;
  transform: scale(1.04);
  transition:
    opacity   var(--dur-editorial, 1000ms) var(--ease-veil, cubic-bezier(0.16,1,0.3,1)),
    transform var(--dur-editorial, 1000ms) var(--ease-veil, cubic-bezier(0.16,1,0.3,1));
}
html.js-motion .about-portrait.in {
  opacity: 1;
  transform: none;
}

/* ─── ⑤ bis — Signature underline — scaleX · 1000ms + 200ms delay ─── */
.sig-underline {
  position: relative;
  display: inline-block;
}
.sig-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
}
html.js-motion .sig-underline::after {
  transition: transform var(--dur-editorial, 1000ms) var(--ease-veil, cubic-bezier(0.16,1,0.3,1));
  transition-delay: 200ms;
}
html.js-motion .sig-underline.in::after {
  transform: scaleX(1);
}

/* ─── ⑥ Micro-interaction — form field gold trace on :focus-within ─── */
html.js-motion .field {
  position: relative;
}
html.js-motion .field::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-micro, 220ms) var(--ease-soft, cubic-bezier(0.4,0,0.2,1));
  pointer-events: none;
}
html.js-motion .field:focus-within::after {
  transform: scaleX(1);
}

/* ─── ⑥ Testimonials carousel — active/inactive states (transform + opacity only) ─── */
html.js-motion .t-slide {
  opacity: 0.28;
  transform: translateX(var(--dx, 30px));
  transition:
    opacity   var(--dur-standard, 650ms) var(--ease-marzena, cubic-bezier(0.22,1,0.36,1)),
    transform var(--dur-standard, 650ms) var(--ease-marzena, cubic-bezier(0.22,1,0.36,1));
}
html.js-motion .t-slide.active {
  opacity: 1;
  transform: none;
}

/* ─── prefers-reduced-motion: handled at JS level (html.js-motion never added)
   This block is belt-and-suspenders only ─── */
@media (prefers-reduced-motion: reduce) {
  html.js-motion .reveal,
  html.js-motion .veil-inner,
  html.js-motion .about-portrait {
    transition: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
  html.js-motion .field::after,
  html.js-motion .sig-underline::after {
    transition: none !important;
    transform: scaleX(1) !important;
  }
  .hero.corners-armed .corner,
  .hero.corners-draw  .corner {
    transform: none !important;
    transition: none !important;
  }
  .site-header,
  .site-header .wrap { transition: none !important; }
  /* Carousel: all slides fully visible, instant snap */
  html.js-motion .t-slide {
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}