/* =================================================================
   pages.css — per-chapter styling
   ================================================================= */

/* ================================================================
   Section 1 — ORIGIN
   ================================================================ */

.page--origin {
  background: radial-gradient(ellipse at center, #14110c 0%, var(--color-void) 72%);
  color: var(--color-ivory);
}

.page--origin .grain {
  position: absolute;
  inset: 0;
  pointer-events: none;
  mix-blend-mode: overlay;
  opacity: 0.14;
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.35) 1px, transparent 1px),
    radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 3px 3px, 7px 7px;
  background-position: 0 0, 1px 1px;
  z-index: 0;
}

.origin__content {
  position: relative;
  z-index: 1;
  width: min(90vw, 900px);
  margin: 0 auto;
  padding: var(--space-md) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: clamp(1rem, 3vh, 2.5rem);
}

.origin__letter {
  width: clamp(160px, 22vw, 320px);
  height: auto;
  filter: drop-shadow(0 12px 40px rgba(201, 168, 76, 0.18));
}

.origin__letter-svg {
  width: 100%;
  height: auto;
  overflow: visible;
}

.origin__letter-path {
  fill: transparent;
  stroke: var(--color-gold-light);
  stroke-width: 1.6;
  stroke-linejoin: round;
  stroke-linecap: round;
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
}

.origin__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  letter-spacing: 0.02em;
  color: rgba(250, 243, 224, 0.78);
  margin: 0;
}

.origin__tagline {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  line-height: 1.35;
  letter-spacing: -0.005em;
  max-width: 44ch;
  color: var(--color-ivory);
  min-height: 2.7em; /* prevents layout jump until Pretext measures */
}

.origin__tagline .origin__tagline-inner {
  display: inline;
}

/* letter-by-letter entrance handled by JS spans */
.origin__tagline .t-char {
  display: inline-block;
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity var(--duration-medium) var(--ease-out-smooth),
    transform var(--duration-medium) var(--ease-out-smooth);
  white-space: pre;
}
.origin__tagline .t-char.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.origin__scroll-hint {
  margin-top: clamp(1rem, 4vh, 3rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: rgba(250, 243, 224, 0.55);
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-elegant) 1800ms;
}

.page--origin.is-revealed .origin__scroll-hint {
  opacity: 1;
}

.origin__scroll-text {
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
}

.origin__chevron {
  width: 24px;
  color: var(--color-gold-light);
}

/* ================================================================
   Section 2 — ANATOMY
   ================================================================ */

.page--anatomy {
  background: var(--color-parchment);
  color: #22180e;
}

.page--anatomy::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(rgba(107, 45, 62, 0.05) 1px, transparent 1px);
  background-size: 4px 4px;
  opacity: 0.65;
  mix-blend-mode: multiply;
  z-index: 0;
}

.anatomy__grid {
  position: relative;
  z-index: 1;
  width: min(92vw, 1200px);
  height: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 40fr 60fr;
  gap: clamp(2rem, 4vw, 5rem);
  align-items: center;
  padding: clamp(2rem, 6vh, 5rem) 0;
}

.anatomy__specimen {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.anatomy__svg {
  width: 100%;
  max-width: 420px;
  height: auto;
  overflow: visible;
}

.anatomy__glyph {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: 440px;
  fill: #1a1310;
  letter-spacing: -0.02em;
}

.anatomy__line {
  stroke: var(--color-burgundy);
  stroke-width: 1.2;
  stroke-linecap: round;
  fill: none;
  stroke-dasharray: 240;
  stroke-dashoffset: 240;
}

.anatomy__label {
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  fill: var(--color-burgundy);
  opacity: 0;
}

.anatomy__caption {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(107, 45, 62, 0.72);
}

.anatomy__body {
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2vh, 1.75rem);
}

.anatomy__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.38em;
  text-transform: uppercase;
  color: var(--color-burgundy);
}

.anatomy__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.05;
  color: #1a1310;
  max-width: 16ch;
}

.anatomy__columns {
  column-count: 2;
  column-gap: clamp(1.25rem, 2.5vw, 2.5rem);
  column-rule: 1px solid rgba(107, 45, 62, 0.2);
  font-size: clamp(0.95rem, 1.15vw, 1.05rem);
  line-height: 1.65;
  color: #2b2016;
}

.anatomy__columns p {
  margin-bottom: 1em;
  break-inside: avoid;
}
.anatomy__columns p:last-child {
  margin-bottom: 0;
}

.anatomy__columns em {
  color: var(--color-burgundy);
  font-style: italic;
}

.anatomy__columns strong {
  color: #1a1310;
  font-weight: 700;
}

/* ================================================================
   Section 3 — RHYTHM
   ================================================================ */

.page--rhythm {
  background:
    radial-gradient(ellipse 70vw 60vh at 50% 50%, rgba(22, 33, 62, 0.45) 0%, transparent 70%),
    var(--color-night);
  color: var(--color-silver);
}

.page--rhythm .rhythm__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 50% 60%, rgba(240, 165, 0, 0.12) 0%, transparent 55%);
  z-index: 0;
}

.rhythm__header {
  position: absolute;
  top: clamp(2.5rem, 6vh, 4.5rem);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  z-index: 2;
}

.rhythm__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.38em;
  text-transform: uppercase;
  color: rgba(200, 214, 229, 0.6);
  margin-bottom: 0.6rem;
}

.rhythm__title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  color: var(--color-ivory);
}

.rhythm__stage {
  position: relative;
  z-index: 1;
  width: min(92vw, 1100px);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: clamp(0.5rem, 1.6vh, 1.25rem);
  padding-top: clamp(5rem, 12vh, 8rem);
  padding-bottom: 2rem;
}

.rhythm__line {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.4rem, 3vw, 2.4rem);
  line-height: 1.4;
  color: var(--color-silver);
  white-space: pre-wrap;
  opacity: 0;
  transform: translateX(calc(var(--dir, 1) * 120px));
  transition:
    opacity var(--duration-slow) var(--ease-out-smooth) var(--delay, 0ms),
    transform var(--duration-slow) var(--ease-out-smooth) var(--delay, 0ms),
    margin-left var(--duration-medium) var(--ease-elegant);
  /* horizontal offset set by JS via --offset */
  margin-left: var(--offset, 0px);
  width: fit-content;
}

.rhythm__line--accent {
  color: var(--color-amber);
  text-shadow: 0 0 30px rgba(240, 165, 0, 0.25);
}

.page--rhythm.is-active .rhythm__line {
  opacity: 1;
  transform: translateX(0);
}

/* ================================================================
   Section 4 — FUTURE
   ================================================================ */

.page--future {
  background: #000;
  color: var(--color-ivory);
}

.page--future .future__mesh {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(0, 245, 212, 0.22), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(181, 55, 242, 0.22), transparent 45%),
    radial-gradient(circle at 50% 50%, rgba(22, 33, 62, 0.6), transparent 65%),
    linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  background-size: 200% 200%, 200% 200%, 120% 120%, 100% 100%;
  animation: mesh-drift 18s var(--ease-elegant) infinite alternate;
  z-index: 0;
  opacity: 0.9;
}

.page--future .future__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  opacity: 0.85;
  mix-blend-mode: screen;
}

.future__content {
  position: relative;
  z-index: 2;
  width: min(92vw, 1100px);
  margin: 0 auto;
  padding: clamp(2rem, 6vh, 4rem) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(1.25rem, 3vh, 2.5rem);
}

.future__header {
  text-align: center;
}

.future__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.38em;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin-bottom: 0.6rem;
}

.future__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.05;
  background: linear-gradient(120deg, #fff 0%, var(--color-cyan) 50%, var(--color-purple) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.future__kicker {
  margin-top: 0.8rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.72);
  max-width: 52ch;
}

/* The breathing container — width is oscillated by JS via --width. */
.future__breathing {
  position: relative;
  width: var(--width, 70ch);
  max-width: 92vw;
  padding: clamp(1.25rem, 2.5vh, 2rem) clamp(1.25rem, 3vw, 2.5rem);
  border: 1px solid rgba(0, 245, 212, 0.28);
  border-radius: 6px;
  background: rgba(10, 16, 30, 0.55);
  backdrop-filter: blur(6px);
  box-shadow:
    0 0 30px rgba(0, 245, 212, 0.12),
    inset 0 0 0 1px rgba(181, 55, 242, 0.12);
  transition: box-shadow var(--duration-medium) var(--ease-elegant);
}

.future__text {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: clamp(0.9rem, 1.1vw, 1.05rem);
  line-height: 1.65;
  letter-spacing: 0.01em;
  color: rgba(255, 255, 255, 0.92);
  margin: 0;
}

.future__stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: clamp(0.75rem, 1.5vw, 1.5rem);
  width: 100%;
  max-width: 860px;
  margin: 0;
  padding: 0;
}

.future__stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.75rem 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.35);
  border-radius: 4px;
}

.future__stat-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 0.35rem;
}

.future__stat-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.1rem, 1.6vw, 1.5rem);
  color: var(--color-cyan);
  font-variant-numeric: tabular-nums;
}

/* Reduce stat grid on small screens */
@media (max-width: 720px) {
  .future__stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ================================================================
   Section 5 — EPILOGUE
   ================================================================ */

.page--epilogue {
  background: var(--color-obsidian);
  color: var(--color-ivory);
}

.page--epilogue .epilogue__vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse at center, transparent 45%, rgba(0, 0, 0, 0.75) 100%),
    radial-gradient(circle at 50% 50%, rgba(201, 168, 76, 0.08) 0%, transparent 60%);
  z-index: 0;
}

.epilogue__content {
  position: relative;
  z-index: 1;
  width: min(92vw, 820px);
  margin: 0 auto;
  padding: clamp(2rem, 6vh, 4rem) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: clamp(1.25rem, 3vh, 2.25rem);
}

.epilogue__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--color-gold);
}

/* Accordion-expanding quote — height animated via JS --quote-height */
.epilogue__quote-wrap {
  width: 100%;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-out-smooth);
}

.page--epilogue.is-active .epilogue__quote-wrap {
  max-height: var(--quote-height, 600px);
}

.epilogue__quote {
  margin: 0;
  padding: 0;
}

.epilogue__quote-inner {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(1.4rem, 2.6vw, 2.2rem);
  line-height: 1.4;
  color: var(--color-ivory);
  letter-spacing: -0.005em;
  max-width: 32ch;
}

.epilogue__mark {
  font-family: var(--font-display);
  color: var(--color-gold);
  font-size: 1.1em;
  padding: 0 0.08em;
  vertical-align: -0.05em;
}

.epilogue__cite {
  margin-top: 1rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(250, 243, 224, 0.6);
}

.epilogue__credits {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin-top: clamp(1rem, 3vh, 2rem);
}

.epilogue__credit-line {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: rgba(250, 243, 224, 0.75);
}

.epilogue__credit-line--muted {
  color: rgba(250, 243, 224, 0.5);
  font-style: italic;
  font-size: 0.78rem;
}

.epilogue__credit-line a {
  color: var(--color-gold-light);
  border-bottom-color: rgba(245, 215, 122, 0.35);
}

.epilogue__top {
  margin-top: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.25rem;
  border: 1px solid rgba(201, 168, 76, 0.4);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold-light);
  transition:
    background var(--duration-medium) var(--ease-elegant),
    border-color var(--duration-medium) var(--ease-elegant),
    transform var(--duration-medium) var(--ease-elegant),
    box-shadow var(--duration-medium) var(--ease-elegant);
}

.epilogue__top:hover {
  background: rgba(201, 168, 76, 0.08);
  border-color: var(--color-gold-light);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(201, 168, 76, 0.18);
}

.epilogue__top-icon {
  width: 14px;
  display: inline-flex;
  color: var(--color-gold-light);
}

/* ================================================================
   Responsive fallbacks
   ================================================================ */

@media (max-width: 900px) {
  .anatomy__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: start;
    padding-top: clamp(3rem, 10vh, 5rem);
  }
  .anatomy__columns {
    column-count: 1;
  }
  .anatomy__svg {
    max-width: 300px;
  }
  .rhythm__header {
    top: 1.5rem;
  }
  .rhythm__stage {
    padding-top: 6rem;
  }
  .dot-nav {
    right: 0.75rem;
    gap: 0.9rem;
  }
  .dot-nav__label {
    display: none;
  }
}