/* ============================================
   BUSINESS FOUNDERS: Founder Series compartments
   Full-screen themed sections, one per book, with
   scroll-snap. Palette arrives as CSS variables on
   each .comp from js/books-config.js.

   Choreography classes (set by js/books.js):
   .shown  : entrance: book sweeps in from the right
   .active: centre-stage: signature effect plays
   --scrollp: -1..1 scroll position for parallax
   ============================================ */

/* strict paging: one flick moves exactly one compartment */
html {
  scroll-snap-type: y mandatory;
  scroll-behavior: auto; /* smooth-scroll fights the snap engine */
}

.comp {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* ---------- intro compartment ---------- */
.comp-intro {
  flex-direction: column;
  text-align: center;
  padding: 130px 24px 70px;
}
.comp-intro h1 {
  font-size: clamp(36px, 5.6vw, 64px);
  margin-bottom: 20px;
  max-width: 700px;
}
.intro-sub {
  color: var(--text-dim);
  max-width: 580px;
  font-size: 17px;
  margin-bottom: 26px;
}
.intro-count {
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.scroll-hint {
  margin-top: 48px;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border-hover);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  animation: hintBob 2.2s ease-in-out infinite;
}
@keyframes hintBob {
  0%, 100% { transform: translateY(0); opacity: 0.7; }
  50% { transform: translateY(9px); opacity: 1; }
}

/* ---------- shared book-compartment layout ---------- */
.comp-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 78% 18%, var(--bk-accent-faint), transparent 55%),
    linear-gradient(180deg, var(--bk-bg-top), var(--bk-bg-bottom));
}
.comp-watermark {
  position: absolute;
  right: -1vw;
  bottom: -8vh;
  font-family: var(--bk-font, var(--font-display));
  font-size: 46vh;
  line-height: 1;
  color: var(--bk-accent);
  opacity: 0.07;
  user-select: none;
}

.comp-inner {
  position: relative;
  width: 100%;
  max-width: 1080px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(34px, 6vw, 84px);
  padding: 96px 28px 56px;
}

.comp-meta { max-width: 430px; }
.comp-eyebrow { color: var(--bk-accent); }
.comp-meta h2 {
  font-family: var(--bk-font, var(--font-display));
  color: var(--bk-text);
  font-size: clamp(27px, 3.4vw, 42px);
  line-height: 1.18;
  margin: 4px 0 14px;
}
.comp-meta p {
  color: var(--bk-muted);
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 28px;
}
.comp-cta {
  display: inline-block;
  padding: 14px 34px;
  border: 1px solid var(--bk-accent);
  border-radius: 2px;
  color: var(--bk-accent);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: background-color 0.3s, color 0.3s, transform 0.3s;
}
.comp-cta:hover,
.comp-cta:focus-visible {
  background: var(--bk-accent);
  color: var(--bk-bg-bottom);
  transform: translateY(-2px);
}

/* ---------- the stage (book pedestal) ---------- */
.stage {
  position: relative;
  width: clamp(240px, 28vw, 330px);
  flex-shrink: 0;
}
.stage-tilt {
  transform-style: preserve-3d;
  will-change: transform; /* keep the tilt on its own GPU layer */
}

/* grounding shadow: static layer, opacity-only changes */
.stage::after {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: -26px;
  height: 30px;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.55), transparent 70%);
  filter: blur(9px);
  opacity: 0.55;
  transition: opacity 0.5s;
  pointer-events: none;
}
.comp.active .stage::after { opacity: 0.9; }

/* cover shells share fixed geometry, no layout shift */
.book3d,
.book-cover {
  aspect-ratio: 2 / 3;
  width: 100%;
  position: relative;
  transform-style: preserve-3d;
}
.book-cover { overflow: hidden; border-radius: 7px; }
.cover-img,
.book-cover picture,
.book-face picture {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* typographic stand-in cover */
.cover-art {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px 20px;
  background:
    radial-gradient(ellipse at 30% 12%, rgba(255, 255, 255, 0.08), transparent 55%),
    linear-gradient(180deg, var(--bk-bg-top), var(--bk-bg-bottom));
  border: 1px solid var(--bk-accent-soft);
  border-radius: inherit;
}
.cover-brand {
  font-size: 9px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--bk-accent);
}
.cover-title {
  font-family: var(--bk-font, var(--font-display));
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.3;
  color: var(--bk-text);
  transform: translateY(calc(var(--scrollp, 0) * -10px));
}
.cover-num {
  align-self: flex-end;
  font-family: var(--bk-font, var(--font-display));
  font-size: 14px;
  color: var(--bk-accent);
  border-top: 1px solid var(--bk-accent-soft);
  padding-top: 9px;
  width: 100%;
  text-align: right;
}

/* ---------- shared entrance: swipe from the right + fade ---------- */
.stage {
  opacity: 0;
  transform: translateX(15vw);
  transition:
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.45s ease-out;
}
.comp-meta {
  opacity: 0;
  transform: translateX(52px);
  transition:
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1) 0.18s,
    opacity 0.5s ease-out 0.18s;
}
.comp.shown .stage,
.comp.shown .comp-meta {
  opacity: 1;
  transform: none;
}

/* ============================================
   Book 1: Shelf Book (navy, serif)
   Swings in rotated hard, settles on the shelf;
   centre-stage opens it toward the reader.
   ============================================ */
.fx-shelf .book3d {
  transform: perspective(1100px) rotateY(-58deg);
  transition: transform 0.95s cubic-bezier(0.22, 1, 0.36, 1) 0.05s;
}
.comp.shown.fx-shelf .book3d {
  transform: perspective(1100px) rotateY(-17deg);
}
.comp.shown.fx-shelf.active .book3d {
  transform: perspective(1100px) rotateY(-6deg) translateY(-10px);
}

.fx-shelf .book-face {
  position: absolute;
  inset: 0 13px 0 0;
  border-radius: 7px 2px 2px 7px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bk-bg-top), var(--bk-bg-bottom));
}
/* spine strip on the trailing edge reads as the book's depth */
.fx-shelf .book-spine {
  position: absolute;
  top: 1px;
  bottom: 1px;
  right: 0;
  width: 13px;
  background: linear-gradient(90deg, var(--bk-bg-bottom), #060f18);
  border-radius: 0 3px 3px 0;
  border-left: 1px solid rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.fx-shelf .book-spine span {
  writing-mode: vertical-rl;
  font-family: var(--bk-font, serif);
  font-size: 8px;
  letter-spacing: 0.12em;
  color: var(--bk-accent);
  white-space: nowrap;
  opacity: 0.8;
}

/* gold rim-light: sweeps on centre-stage arrival and once every
   ~7s while resting, so the cover keeps catching the light */
.fx-shelf .book-rim {
  position: absolute;
  top: -10%;
  bottom: -10%;
  left: 0;
  width: 46%;
  background: linear-gradient(105deg, transparent 8%, var(--bk-accent-soft) 50%, transparent 92%);
  /* parked fully clear of the cover, the skew's top corner
     otherwise pokes back into view at the top-left */
  transform: translateX(-180%) skewX(-16deg);
  animation: rimSweep 7s linear infinite;
  pointer-events: none;
}
@keyframes rimSweep {
  0%, 78% { transform: translateX(-180%) skewX(-16deg); }
  92%, 100% { transform: translateX(340%) skewX(-16deg); }
}
.comp.fx-shelf.active .book-rim {
  animation: rimSweep 2.6s linear infinite;
}

/* ============================================
   Book 2: Lift-off (light cobalt, minimal)
   Rises into frame from below; centre-stage lifts
   it off the ground with the glow underneath.
   ============================================ */
.fx-lift .stage {
  transform: translateY(16vh) scale(0.94);
}
.comp.shown.fx-lift .stage {
  transform: none;
}
.fx-lift .book-cover {
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  animation: bkFloat 6s ease-in-out infinite;
}
.comp.fx-lift.active .book-cover {
  transform: translateY(-16px) scale(1.03);
}
@keyframes bkFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.bk-glow {
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: -20px;
  height: 46px;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, color-mix(in srgb, var(--bk-accent) 65%, transparent), transparent 72%);
  filter: blur(16px);
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}
.comp.fx-lift.active .bk-glow { opacity: 1; }

.fx-lift .cover-art { border-color: rgba(27, 69, 216, 0.25); }
.fx-lift .bk-spark {
  position: absolute;
  top: 16px;
  right: 16px;
  color: var(--bk-accent);
  font-size: 19px;
  animation: sparkTwinkle 4.5s ease-in-out infinite;
}
@keyframes sparkTwinkle {
  0%, 84%, 100% { transform: scale(1); opacity: 1; }
  92% { transform: scale(1.7) rotate(20deg); opacity: 0.55; }
}

/* ============================================
   Book 3: The Rising Curve (emerald)
   Curve draws itself on every section entry;
   centre-stage ignites the endpoint node.
   ============================================ */
.fx-curve .curve {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.fx-curve .curve-path {
  fill: none;
  stroke: var(--bk-accent);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: var(--len, 400);
  stroke-dashoffset: var(--len, 400);
}
.comp.shown.fx-curve .curve-path {
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1.15s ease-out 0.35s;
}
.fx-curve .node {
  fill: var(--bk-accent);
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
}
.comp.shown.fx-curve .node {
  opacity: 1;
  transition: opacity 0.3s 1.4s;
  animation: nodePulse 0.8s ease-out 1.45s;
}
@keyframes nodePulse {
  0% { transform: scale(1); }
  45% { transform: scale(1.9); }
  100% { transform: scale(1); }
}
.fx-curve .node-glow {
  fill: var(--bk-accent-soft);
  opacity: 0;
  transition: opacity 0.5s 1.4s;
}
.comp.shown.fx-curve .node-glow { opacity: 0.3; }
.comp.shown.fx-curve.active .node-glow {
  opacity: 0.7;
  transition-delay: 0s;
}

/* ============================================
   Book 4: The Grid Turns Gold (wine)
   Tiles cascade in diagonally on entry, then the
   centre-stage ripple lifts them and turns them gold.
   ============================================ */
.grid-cover {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 9px;
  padding: 18px;
  overflow: visible;
  background: linear-gradient(180deg, var(--bk-bg-top), var(--bk-bg-bottom));
  border: 1px solid var(--bk-accent-soft);
  border-radius: 7px;
}
.tile {
  position: relative;
  border-radius: 4px;
  background: var(--tile-c);
  opacity: 0;
  transform: translateY(26px);
  transition:
    transform 0.5s cubic-bezier(0.22, 1, 0.36, 1) var(--rd),
    opacity 0.4s ease-out var(--rd);
}
.comp.shown .tile {
  opacity: 1;
  transform: translateZ(calc(var(--lift) * 0.2));
}
.comp.shown.fx-grid.active .tile {
  transform: translateZ(var(--lift));
}
/* one pre-set shadow + one gold overlay per tile, opacity only */
.tile::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.45);
  opacity: 0.3;
  transition: opacity 0.45s var(--rd);
}
.tile::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--bk-accent);
  opacity: 0;
  transition: opacity 0.45s var(--rd);
}
.comp.fx-grid.active .tile::before { opacity: 0.7; }
.comp.fx-grid.active .tile::after { opacity: 0.85; }

/* ============================================
   Bundle compartment
   ============================================ */
.bundle-bg {
  background:
    radial-gradient(ellipse at 50% 110%, rgba(212, 175, 55, 0.16), transparent 60%),
    linear-gradient(180deg, #0b0b0e, #060607);
}
.bundle-minis {
  display: flex;
  gap: 14px;
  perspective: 700px;
  flex-shrink: 0;
}
.mini {
  width: 70px;
  aspect-ratio: 2 / 3;
  border-radius: 5px;
  background: linear-gradient(180deg, var(--mtop), var(--mbot));
  border: 1px solid rgba(255, 255, 255, 0.16);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 8px;
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--macc);
  transform: rotateY(calc((var(--mi) - 1.5) * -13deg)) translateY(40px);
  opacity: 0;
  transition:
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1) calc(var(--mi) * 110ms),
    opacity 0.5s ease-out calc(var(--mi) * 110ms);
}
.comp.shown .mini {
  opacity: 1;
  transform: rotateY(calc((var(--mi) - 1.5) * -13deg)) translateY(0);
  animation: miniBob 5.5s ease-in-out calc(var(--mi) * 0.6s) infinite;
}
@keyframes miniBob {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -6px; }
}
.bundle-meta h2 { font-family: var(--font-display); font-size: clamp(28px, 4vw, 44px); margin: 4px 0 14px; }
.bundle-meta p { color: var(--text-dim); font-size: 16px; margin-bottom: 28px; max-width: 400px; }

/* ---------- tail (guarantee + footer) ---------- */
.comp-tail {
  min-height: auto;
  display: block;
  padding-top: 70px;
}
.tail-inner {
  max-width: var(--max-w);
  margin: 0 auto 70px;
  padding: 0 24px;
}

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .comp-inner {
    flex-direction: column;
    text-align: center;
    gap: 30px;
    padding: 92px 24px 48px;
  }
  .comp-meta { max-width: 460px; }
  .comp-meta p { margin-bottom: 22px; }
  .stage { width: min(58vw, 270px); }
  .comp-watermark { font-size: 34vh; bottom: -4vh; }
  .bundle-minis { justify-content: center; }
  .comp-meta h2 { font-size: clamp(24px, 6vw, 32px); }
}

@media (max-height: 700px) and (max-width: 860px) {
  .stage { width: min(46vw, 220px); }
  .comp-meta h2 { font-size: 22px; }
  .comp-meta p { font-size: 14px; }
}

/* ============================================
   Reduced motion: no choreography, no snap-lock;
   everything rests in its final, fully-visible state
   (js adds .shown/.active immediately).
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-snap-type: none; }
  .stage,
  .comp-meta,
  .stage-tilt,
  .book3d,
  .book-cover,
  .book-rim,
  .bk-spark,
  .bk-glow,
  .tile,
  .tile::before,
  .tile::after,
  .mini,
  .scroll-hint,
  .fx-curve .curve-path,
  .fx-curve .node,
  .fx-curve .node-glow {
    transition: none !important;
    animation: none !important;
  }
  .comp.shown.fx-curve .curve-path { stroke-dashoffset: 0; }
}

/* final-sale disclosure under the bundle CTA */
.bundle-note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--text-dim);
  max-width: 380px;
}