/* ==========================================================================
   Sections — layout and atmosphere for each chapter of the single page.
   ========================================================================== */

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + var(--space-xl)) 0 var(--space-2xl);
  background: var(--gradient-hero);
  overflow: hidden;
  isolation: isolate;
}

.hero__backword,
.cta__backword {
  position: absolute;
  z-index: -1;
  font-family: var(--font-display-latin);
  font-size: 42vw;
  line-height: 0.8;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 2px rgb(255 255 255 / 0.12);
  pointer-events: none;
  user-select: none;
}

.hero__backword {
  right: -4vw;
  bottom: -6vw;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  align-items: center;
  gap: var(--space-xl);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.poster--hero {
  width: min(100%, 480px);
}

/* ---------- Marquee ---------- */
.marquee {
  overflow: hidden;
  padding: var(--space-md) 0;
  color: var(--color-ink);
  background: var(--color-gold);
  transform: rotate(-2deg) scale(1.04);
  margin-top: -1.5rem;
  position: relative;
  z-index: 2;
}

.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee 32s linear infinite;
}

.marquee__group {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding-right: var(--space-lg);
  font-family: var(--font-display-latin);
  font-size: clamp(2rem, 1rem + 3vw, 3.75rem);
  line-height: 1;
  white-space: nowrap;
}

.marquee__group span:nth-of-type(even) {
  font-family: var(--font-sans);
  font-weight: var(--weight-black);
  letter-spacing: -0.04em;
}

.marquee__group i {
  font-style: normal;
  font-size: 0.6em;
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ---------- Statement (weight on scroll) ---------- */
.statement {
  padding: var(--space-2xl) var(--gutter);
  background: var(--color-ink);
  text-align: center;
  overflow: hidden;
}

.statement__line {
  font-size: clamp(3rem, 1rem + 9vw, 11rem);
  font-weight: var(--weight-thin);
  line-height: 1.05;
  letter-spacing: -0.05em;
  word-break: keep-all;
}

.statement__line--blue {
  color: var(--color-blue-soft);
}

/* ---------- Chapter (shared feature layout) ---------- */
.chapter {
  position: relative;
  padding: var(--space-2xl) 0;
  overflow: hidden;
  isolation: isolate;
}

.chapter--blue {
  background: var(--gradient-hero);
}

.chapter--ink {
  background: var(--color-charcoal);
}

.chapter--paper {
  color: var(--color-ink);
  background: var(--color-paper);
}

.chapter__index {
  position: absolute;
  top: var(--space-lg);
  left: var(--gutter);
  z-index: -1;
  font-family: var(--font-display-latin);
  font-size: clamp(8rem, 4rem + 18vw, 22rem);
  line-height: 0.8;
  color: transparent;
  -webkit-text-stroke: 2px currentColor;
  opacity: 0.12;
}

.chapter__index--static {
  position: static;
  display: block;
  margin-bottom: calc(var(--space-xl) * -1);
}

.chapter__grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  gap: var(--space-xl);
}

.chapter__grid--reverse {
  grid-template-columns: 1fr 1.15fr;
}

.chapter--ink .numeral--outline {
  color: transparent;
  -webkit-text-stroke: 2px var(--color-blue-soft);
  margin-bottom: var(--space-sm);
}

/* ---------- AI ---------- */
.ai {
  position: relative;
  padding: var(--space-2xl) 0;
  background: #050505;
  overflow: hidden;
  isolation: isolate;
}

.ai__glow {
  position: absolute;
  inset: 0;
  z-index: -1;
  filter: blur(80px);
  opacity: 0.7;
}

.ai__orb {
  position: absolute;
  width: 40vw;
  height: 40vw;
  border-radius: 50%;
  animation: orb-drift 14s ease-in-out infinite alternate;
}

.ai__orb--red {
  top: -10%;
  left: -10%;
  background: radial-gradient(circle, rgb(255 45 45 / 0.55), transparent 65%);
}

.ai__orb--green {
  top: 20%;
  right: -12%;
  background: radial-gradient(circle, rgb(40 255 120 / 0.4), transparent 65%);
  animation-delay: -5s;
}

.ai__orb--pink {
  bottom: -15%;
  left: 30%;
  background: radial-gradient(circle, rgb(255 77 141 / 0.4), transparent 65%);
  animation-delay: -9s;
}

@keyframes orb-drift {
  to { transform: translate(6vw, 4vw) scale(1.15); }
}

.ai__inner {
  text-align: center;
}

.ai__title {
  display: inline-block;
}

.insights {
  display: grid;
  gap: var(--space-sm);
  margin: var(--space-xl) auto 0;
  max-width: 900px;
}

.insight {
  font-size: clamp(1.5rem, 1rem + 2.4vw, 3rem);
  font-weight: var(--weight-bold);
  letter-spacing: -0.03em;
  line-height: 1.3;
  word-break: keep-all;
}

.insight em {
  font-style: normal;
  font-weight: var(--weight-black);
  color: var(--color-blue-soft);
  font-variant-numeric: tabular-nums;
}

.insight em.insight__up {
  color: var(--color-red);
}

.ai__showcase {
  width: min(100%, 720px);
  margin: var(--space-xl) auto 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 0 120px -20px rgb(255 77 141 / 0.45), var(--shadow-poster);
}

/* ---------- Proof ---------- */
.proof {
  padding: var(--space-2xl) 0;
  background: var(--color-blue);
}

.proof__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-lg);
  align-items: end;
}

.proof__item {
  padding-top: var(--space-md);
  border-top: 3px solid var(--color-white);
}

.proof__item .numeral {
  font-size: clamp(4rem, 2rem + 7vw, 10rem);
}

.proof__item .numeral--text {
  font-size: clamp(2.5rem, 1rem + 4vw, 5.5rem);
}

.proof__label {
  margin-top: var(--space-sm);
  font-weight: var(--weight-bold);
  opacity: 0.85;
}

/* ---------- Reviews ---------- */
.reviews {
  padding: var(--space-2xl) 0;
  background: var(--gradient-hero);
}

/* ---------- CTA ---------- */
.cta {
  position: relative;
  padding: var(--space-2xl) 0 calc(var(--space-2xl) * 1.5);
  background: var(--color-ink);
  overflow: hidden;
  isolation: isolate;
  text-align: center;
}

.cta__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cta__inner .lead {
  margin-inline: auto;
}

.cta__accent {
  color: var(--color-gold);
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.cta__backword {
  left: 50%;
  bottom: -10vw;
  transform: translateX(-50%);
  -webkit-text-stroke-color: rgb(37 99 235 / 0.35);
}

/* ---------- Footer ---------- */
.site-footer {
  padding: var(--space-lg) 0;
  background: var(--color-ink);
  border-top: 1px solid rgb(255 255 255 / 0.08);
}

.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  opacity: 0.7;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-md);
  font-size: var(--text-sm);
}

.footer-links__item {
  opacity: 0.7;
  transition: opacity var(--duration-fast) var(--ease-snap), color var(--duration-fast) var(--ease-snap);
}

.footer-links__item--strong {
  font-weight: var(--weight-bold);
  opacity: 1;
}

.footer-links__item:hover {
  opacity: 1;
  color: var(--color-gold);
}

.business-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-sm) var(--space-lg);
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid rgb(255 255 255 / 0.08);
  font-size: var(--text-xs);
  line-height: 1.5;
}

.business-info__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}

.business-info dt {
  font-weight: var(--weight-bold);
  opacity: 0.45;
}

.business-info dd {
  opacity: 0.75;
  word-break: keep-all;
}

.business-info a {
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--duration-fast) var(--ease-snap);
}

.business-info a:hover {
  color: var(--color-gold);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero__inner,
  .chapter__grid,
  .chapter__grid--reverse {
    grid-template-columns: 1fr;
  }

  .chapter__grid--reverse .poster {
    order: 2;
  }

  .proof__grid {
    grid-template-columns: 1fr;
  }

  .poster {
    width: min(100%, 400px);
  }
}

@media (max-width: 520px) {
  .lead br {
    display: none;
  }

  .site-footer__inner {
    flex-direction: column;
  }
}