/* ==========================================================================
   NOVA DENTAL — Kinetic 3D type
   1) Statements between sections (kinetic-type.js)
   2) Treatment-stage copy: 3D word hinge + detail paragraph reveal
   3) Scroll cue chevrons
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Statements
   -------------------------------------------------------------------------- */
.kinetic-layer {
  position: absolute;
  inset: 0;
  z-index: 1;                      /* above the backdrop, behind panels + tooth */
  pointer-events: none;
  perspective: 1100px;
  perspective-origin: 50% 50%;
}

.kinetic-line {
  /* half of the tooth's width + breathing room: the halves frame the tooth */
  --kgap: calc(min(65vh, 600px * var(--uiz, 1)) * 0.31 + 2.5vw);
  position: absolute;
  inset: 0;
  margin: 0;
  visibility: hidden;
  transform-style: preserve-3d;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: min(5vw, calc(112px * var(--uiz, 1)), 11vh);
  line-height: 1;
  letter-spacing: -0.035em;
  color: #F4F1FF;
}
.kinetic-line.is-on { visibility: visible; }
/* compositor layers only for the line that is actually playing (~60 letters),
   not for all five lines' ~300 letters all the time */
.kinetic-line.is-on .kl-char { will-change: transform, opacity; }

.kl-half {
  position: absolute;
  top: 50%;
  width: calc(50% - var(--kgap) - 4vw);
  transform: translateY(-50%);
  transform-style: preserve-3d;
}
.kl-left  { right: calc(50% + var(--kgap) * var(--kgk, 1) + 0.13em); text-align: right; transform-origin: 100% 50%; }
.kl-right { left: calc(50% + var(--kgap) * var(--kgk, 1) + 0.13em);  text-align: left;  transform-origin: 0% 50%; }

.kl-word {
  display: inline-block;
  white-space: nowrap;
  transform-style: preserve-3d;
}

.kl-char {
  display: inline-block;
  transform-origin: 50% 100% -0.15em;
  backface-visibility: hidden;
  opacity: 0;
  /* stacked violet layers = extruded depth, then a soft cast shadow */
  text-shadow:
    0 0.012em 0 #DCD3FF,
    0 0.024em 0 #BBAEF6,
    0 0.036em 0 #9C8DEC,
    0 0.048em 0 #7E6DE0,
    0 0.060em 0 #6453CF,
    0 0.075em 0.01em rgba(20, 10, 60, 0.55),
    0 0.16em 0.3em rgba(8, 2, 34, 0.55),
    0 0 0.45em rgba(139, 124, 255, 0.22);
}

.kl-word--accent .kl-char {
  color: #FFC4D6;
  text-shadow:
    0 0.012em 0 #FFB0C8,
    0 0.024em 0 #F596B3,
    0 0.036em 0 #E07B9E,
    0 0.048em 0 #C76288,
    0 0.060em 0 #A84B73,
    0 0.075em 0.01em rgba(40, 8, 40, 0.55),
    0 0.16em 0.3em rgba(8, 2, 34, 0.55),
    0 0 0.45em rgba(255, 143, 177, 0.28);
}

/* stacked mode: in the page flow, two centred lines */
.kinetic-line.kl-flow {
  position: relative;
  inset: auto;
  display: block;
  padding: 16vh 6vw;
  text-align: center;
  font-size: clamp(40px, 11vw, 76px);
  perspective: 900px;
}
.kinetic-line.kl-flow .kl-half {
  position: relative;
  top: auto; left: auto; right: auto;
  display: block;
  width: auto;
  text-align: center;
  transform: none;
}
.kinetic-line.kl-flow .kl-half + .kl-half { margin-top: 0.08em; }

@media (prefers-reduced-motion: reduce) {
  .kl-char { opacity: 1; }
  .kinetic-line.is-on .kl-char { will-change: auto; }
}

/* --------------------------------------------------------------------------
   2. Treatment-stage copy
   -------------------------------------------------------------------------- */
/* words hinge up from their baseline (film-strip.js adds rotateX) */
.word-mask { perspective: 700px; }
.word-mask .word { transform-origin: 50% 100%; backface-visibility: hidden; }

/* Step card (.jdc): glass panel with the plain-language description of the
   step. Desktop film: placed on the empty side of the tooth, opposite the
   headline, and swung in with the chapter's --v (0..1, set by film-strip.js).
   Its offsets are divided by --uiz because large screens zoom the column's
   children (responsive.css). */
.jdc {
  --jdc-dir: 1;
  position: absolute;
  top: 50%;
  width: min(420px, calc(24vw / var(--uiz, 1)));
  padding: 30px 30px 26px;
  border-radius: 22px;
  isolation: isolate;
  overflow: hidden;
  text-align: left;
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(255, 143, 177, 0.10), transparent 55%),
    linear-gradient(155deg, rgba(255, 255, 255, 0.10) 0%, rgba(255, 255, 255, 0.03) 55%, rgba(139, 124, 255, 0.07) 100%);
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: 0 40px 80px -40px rgba(8, 2, 34, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.14);
  opacity: calc((var(--v, 1) - 0.2) * 1.25);
  transform:
    translateY(-50%) perspective(1000px)
    translateX(calc((1 - var(--v, 1)) * var(--jdc-dir) * 90px))
    rotateY(calc((1 - var(--v, 1)) * var(--jdc-dir) * -38deg));
}
/* hairline gradient border */
.jdc::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(214, 204, 255, 0.55), rgba(255, 143, 177, 0.30) 35%, rgba(199, 184, 255, 0.06) 65%, rgba(139, 124, 255, 0.40));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0);
  pointer-events: none;
}
/* headline on the left (01/03/05) → card on the right, and vice versa */
.journey-pos-01 .jdc, .journey-pos-03 .jdc, .journey-pos-05 .jdc {
  left: calc(64vw / var(--uiz, 1));
  --jdc-dir: 1;
  transform-origin: 100% 50%;
}
.journey-pos-02 .jdc, .journey-pos-04 .jdc {
  left: calc(-64vw / var(--uiz, 1));
  --jdc-dir: -1;
  transform-origin: 0% 50%;
}

.jdc-num {
  position: absolute;
  right: 14px;
  top: -18px;
  z-index: -1;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 128px;
  line-height: 1;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(199, 184, 255, 0.16);
  pointer-events: none;
}

.jdc-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(207, 198, 245, 0.72);
}
.jdc-step { color: var(--accent); }
.jdc-sep { width: 26px; height: 1px; background: linear-gradient(90deg, var(--accent), transparent); }

.jdc-text {
  margin: 18px 0 24px;
  font-family: var(--font-body);
  font-size: clamp(15.5px, 1.05vw, 18.5px);
  font-weight: 400;
  line-height: 1.65;
  letter-spacing: 0.005em;
  color: #ECE8FF;
}

.jdc-progress {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}
.jdc-progress i {
  display: block;
  height: 3px;
  border-radius: 3px;
  background: rgba(199, 184, 255, 0.16);
}
.jdc-progress i.done { background: linear-gradient(90deg, var(--ray), var(--primary)); }
.jdc-progress i.current {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  box-shadow: 0 0 10px rgba(255, 143, 177, 0.6);
}

/* stacked mode: the card follows the copy in the flow */
@media (max-width: 1024px), (pointer: coarse), (prefers-reduced-motion: reduce) {
  .jdc,
  .journey-pos-01 .jdc, .journey-pos-02 .jdc, .journey-pos-03 .jdc,
  .journey-pos-04 .jdc, .journey-pos-05 .jdc {
    position: relative;
    top: auto;
    left: auto;
    width: 100%;
    max-width: 520px;
    margin: 22px auto 0;
    padding: 24px 22px 20px;
    opacity: 1;
    transform: none;
  }
  .jdc-num { font-size: 96px; top: -12px; }
  .jdc-text { font-size: clamp(15px, 3.9vw, 17px); margin: 14px 0 20px; }
}
@media (min-width: 640px) and (max-width: 1024px) {
  .jdc { margin-left: 0; }
}

/* --------------------------------------------------------------------------
   3. Scroll cue — two chevrons cascading downward
   -------------------------------------------------------------------------- */
.scroll-arrow-down { color: var(--primary); animation: none; line-height: 0; }
.scroll-chevron { animation: novaChevron 1.8s cubic-bezier(.45, 0, .2, 1) infinite; }
.scroll-chevron--2 { animation-delay: .22s; }
@keyframes novaChevron {
  0%   { opacity: 0.25; transform: translateY(-3px); }
  35%  { opacity: 1; }
  70%  { opacity: 0.35; transform: translateY(3px); }
  100% { opacity: 0.25; transform: translateY(3px); }
}
@media (prefers-reduced-motion: reduce) {
  .scroll-chevron { animation: none; opacity: .9; }
}