/* ─────────────────────────────────────────────────────────────
   CIE motion — site language + complementary snappy utilities.

   From the site (snappier portable timings):
     · --ease-expo / --ease-out / --ease-snap, 280–420ms expands
     · type weight breath (font-variation-settings)
     · rise + stagger after open
     · press nudge (translateX)
     · prefers-reduced-motion collapses everything

   Complementary (site has no dedicated loader): a two-ink block
   pulse in the same radius / expo language — シュパシュパ, not floaty.
   ───────────────────────────────────────────────────────────── */

/* ── Loader: ink block that snaps between two states ──────── */
.cie-loader {
  --cie-loader-size: 40px;
  width: var(--cie-loader-size);
  height: var(--cie-loader-size);
  border-radius: calc(var(--cie-r) * 0.55);
  background: var(--cie-paper);
  display: inline-grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  animation: cie-loader-pulse var(--cie-t-cell) var(--cie-ease-expo) infinite alternate;
}
.cie-loader::before {
  content: '';
  width: 38%;
  height: 38%;
  border-radius: 2px;
  background: var(--cie-ink);
  animation: cie-loader-tick calc(var(--cie-t-snap) * 2.2) var(--cie-ease-out) infinite alternate;
}
.cie-loader--lg { --cie-loader-size: 64px; }
.cie-loader--sm { --cie-loader-size: 24px; }
.cie-loader--ink {
  background: var(--cie-ink);
  box-shadow: inset 0 0 0 1px var(--cie-stroke);
}
.cie-loader--ink::before { background: var(--cie-paper); }

.cie-loader-dots {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--cie-mono);
  font-size: var(--cie-text-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cie-ink-mute);
}
.cie-loader-dots::after {
  content: '';
  display: inline-block;
  width: 3ch;
  text-align: left;
  animation: cie-dots 720ms steps(1, end) infinite;
}

@keyframes cie-loader-pulse {
  from { transform: scale(0.92); border-radius: calc(var(--cie-r) * 0.4); }
  to   { transform: scale(1);    border-radius: var(--cie-r); }
}
@keyframes cie-loader-tick {
  from { transform: scale(0.7) rotate(0deg); opacity: 0.85; }
  to   { transform: scale(1) rotate(90deg); opacity: 1; }
}
@keyframes cie-dots {
  0%   { content: ''; }
  25%  { content: '.'; }
  50%  { content: '..'; }
  75%  { content: '...'; }
}

/* Overlay helper */
.cie-loading-screen {
  position: fixed; inset: 0;
  display: grid; place-items: center;
  gap: var(--cie-s-16);
  background: var(--cie-ink);
  color: var(--cie-paper);
  z-index: 100;
}

/* ── Fade / rise (site `.rise`) ───────────────────────────── */
@keyframes cie-rise {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: none; }
}
@keyframes cie-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes cie-slide-x {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: none; }
}

.cie-rise {
  animation: cie-rise var(--cie-t-rise) var(--cie-ease-out) both;
  animation-delay: calc(var(--i, 0) * var(--cie-t-stagger));
}
.cie-fade {
  animation: cie-fade var(--cie-t-fast) var(--cie-ease-out) both;
  animation-delay: calc(var(--i, 0) * var(--cie-t-stagger));
}
.cie-slide {
  animation: cie-slide-x var(--cie-t-cell) var(--cie-ease-out) both;
  animation-delay: calc(var(--i, 0) * var(--cie-t-stagger));
}

/* Stagger host: set --i on children, or use nth helpers */
.cie-stagger > *:nth-child(1) { --i: 0; }
.cie-stagger > *:nth-child(2) { --i: 1; }
.cie-stagger > *:nth-child(3) { --i: 2; }
.cie-stagger > *:nth-child(4) { --i: 3; }
.cie-stagger > *:nth-child(5) { --i: 4; }
.cie-stagger > *:nth-child(6) { --i: 5; }
.cie-stagger > *:nth-child(7) { --i: 6; }
.cie-stagger > *:nth-child(8) { --i: 7; }
.cie-stagger > *:nth-child(9) { --i: 8; }
.cie-stagger > *:nth-child(10) { --i: 9; }

/* Reveal-on-in — lightweight fallback.
   Prefer scroll.css + interaction.js for IntersectionObserver reveals
   and parallax. This block keeps pages that only load motion.css working
   if something adds .is-in manually. */
[data-cie-reveal] {
  opacity: 0;
  transform: translateY(var(--cie-reveal-y, 10px));
  transition:
    opacity var(--cie-t-cell) var(--cie-ease-out),
    transform var(--cie-t-cell) var(--cie-ease-out);
  transition-delay: calc(var(--i, 0) * var(--cie-t-stagger));
}
[data-cie-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ── Press / hover micro-interactions ─────────────────────── */
.cie-press {
  transition: transform var(--cie-t-snap) var(--cie-ease-out);
  transform-origin: left center;
}
.cie-press:active { transform: translateX(3px); }
@media (hover: hover) {
  .cie-press:hover { transform: translateX(3px); }
}

.cie-arrow::after {
  content: '→';
  display: inline-block;
  margin-inline-start: 0.35em;
  transition: transform var(--cie-t-fast) var(--cie-ease-out);
}
.cie-arrow--ext::after { content: '↗'; }
@media (hover: hover) {
  .cie-arrow:hover::after { transform: translateX(5px); }
  .cie-arrow--ext:hover::after { transform: translate(3px, -3px); }
}

/* Weight breath — Outfit variable axis (site menu / row titles) */
.cie-breath {
  font-weight: 300;
  font-variation-settings: 'wght' 300;
  transition:
    font-variation-settings 380ms var(--cie-ease-out),
    font-weight 380ms var(--cie-ease-out),
    transform 380ms var(--cie-ease-out);
}
@media (hover: hover) {
  .cie-breath:hover,
  .cie-breath:focus-visible {
    font-weight: 640;
    font-variation-settings: 'wght' 640;
  }
}
:lang(ja) .cie-breath:hover,
:lang(ja) .cie-breath:focus-visible {
  font-weight: 640;
}

/* Soft scale settle (away-cell language, inverted for enter) */
.cie-pop {
  animation: cie-pop var(--cie-t-cell) var(--cie-ease-expo) both;
}
@keyframes cie-pop {
  from { opacity: 0; transform: scale(0.8); }
  to   { opacity: 1; transform: none; }
}

/* Underline grow (nav-style) */
.cie-uline {
  position: relative;
  display: inline-block;
}
.cie-uline::after {
  content: '';
  position: absolute; left: 0; right: 0; bottom: -2px;
  height: 1px; background: currentColor;
  transform: scaleX(0); transform-origin: left;
  transition: transform 260ms var(--cie-ease-out);
}
@media (hover: hover) {
  .cie-uline:hover::after { transform: scaleX(1); }
}
.cie-uline.is-active::after { transform: scaleX(1); }

/* Round panel buttons (site .pbtn language) */
.cie-pbtn {
  width: 44px; height: 44px;
  border-radius: var(--cie-r-pill);
  background: var(--cie-btn);
  display: inline-grid; place-items: center;
  transition:
    background-color 150ms linear,
    transform 150ms var(--cie-ease-out);
}
@media (hover: hover) {
  .cie-pbtn:hover { background: var(--cie-btn-hover); transform: scale(1.04); }
}
.cie-pbtn:active { transform: scale(0.96); }

/* ── Reduced motion ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .cie-loader,
  .cie-loader::before,
  .cie-loader-dots::after,
  .cie-rise,
  .cie-fade,
  .cie-slide,
  .cie-pop {
    animation: none !important;
  }
  .cie-loader { transform: none; }
  .cie-loader::before { transform: none; opacity: 1; }
  .cie-loader-dots::after { content: '…'; animation: none; }
  [data-cie-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .cie-press,
  .cie-arrow::after,
  .cie-breath,
  .cie-uline::after,
  .cie-pbtn {
    transition: none !important;
  }
  .cie-press:hover,
  .cie-press:active { transform: none; }
}