/* SALTA — the waterline transition.
   One split above/below photograph. Scroll drives a clip-path that lets the
   underwater half take over the frame; the headline swaps at the crossover.
   The photograph is never faked with SVG waves. */

.water {
  position: relative;
  background: var(--deep);
  color: var(--white);
  padding-block: 0;
}
.water__scroller { position: relative; height: 260svh; }
.water__stage {
  position: sticky;
  top: 0;
  height: 100svh;
  overflow: hidden;
  display: grid;
  place-items: center;
}
.water__media {
  position: absolute;
  inset: clamp(.75rem, 1.5vw, 1.5rem);
  border-radius: var(--r-xl);
  overflow: hidden;
}
.water__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* the frame keeps still while the photograph slides its waterline past */
  object-position: 50% calc(38% + var(--water-shift, 0%) * 1);
  scale: var(--water-scale, 1.04);
  will-change: object-position, scale;
}
.water__media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(5, 43, 69, .30) 0%,
    rgba(5, 43, 69, .08) 35%,
    rgba(5, 43, 69, calc(.18 + var(--water-depth, 0) * .48)) 100%);
}

.water__copy {
  position: relative;
  z-index: 2;
  text-align: center;
  display: grid;
  gap: 1rem;
  justify-items: center;
  padding-inline: var(--gutter);
}
.water__line {
  position: relative;
  transition: opacity .5s var(--ease-out), translate .6s var(--ease-out), filter .5s;
}
.water__line--deep {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  opacity: 0;
  translate: 0 22px;
}
.water__line[hidden] { display: none; }
.water__line.is-out { opacity: 0; translate: 0 -22px; }
.water__line.is-in-deep { opacity: 1; translate: 0 0; }
.water__title {
  font-size: var(--t-mega);
  line-height: .82;
  letter-spacing: var(--track-mega);
  text-transform: uppercase;
  text-shadow: 0 10px 60px rgba(5, 43, 69, .5);
}
.water__title .accent { color: var(--turq); }
.water__sub {
  font-size: var(--t-label);
  font-weight: 600;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--white-70);
}

/* a thin lime rule that sinks with the scroll — the "surface" marker */
.water__rule {
  position: absolute;
  left: clamp(.75rem, 1.5vw, 1.5rem);
  right: clamp(.75rem, 1.5vw, 1.5rem);
  top: calc(18% + var(--water-depth, 0) * 64%);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lime), transparent);
  opacity: calc(.75 - var(--water-depth, 0) * .55);
  z-index: 2;
  pointer-events: none;
}

@media (max-width: 900px) {
  .water__scroller { height: 200svh; }
  .water__media { inset: .5rem; border-radius: var(--r-lg); }
}
@media (prefers-reduced-motion: reduce) {
  .water__scroller { height: auto; }
  .water__stage { position: relative; height: 78svh; }
}