/**
 * Scroll overlap scene: fixed scroll-dark section, collage slides up over it
 */

/* Scene container */
.scroll-overlap-scene {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  will-change: transform;
  backface-visibility: hidden;
}

.scroll-overlap-scene .section-scroll-dark {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scroll-overlap-scene .section-collage-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  min-height: 100vh;
  height: auto;
  z-index: 2;
  margin-top: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow: hidden;
  padding-top: 2rem;
  padding-bottom: 3rem;
  background: transparent;
  will-change: transform;
  contain: layout paint;
  backface-visibility: hidden;
}

.scroll-overlap-scene .section-collage-overlay .collage-wrap {
  width: 100%;
  max-width: 1100px;
  flex-shrink: 0;
}

.scroll-overlap-scene .section-collage-overlay .collage-img img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scroll-overlap-scene .section-collage {
  margin-top: 0;
}

/* Scroll-dark section (light bg, text + letter reveal) */
.section-scroll-dark {
  background: #181411;
  color: #fff;
  position: relative;
  z-index: 1;
}

.section-scroll-dark::before,
.section-scroll-dark::after {
  content: '';
  position: absolute;
  left: 50%;
  width: 1px;
  height: 70px;
  background: var(--color-bg);
  transform: translateX(-50%) scaleY(0);
}

.section-scroll-dark::before {
  top: 0;
  transform-origin: top center;
}

.section-scroll-dark::after {
  bottom: 0;
  transform-origin: bottom center;
}

.section-scroll-dark.visible::before {
  animation: scrollOverlapBarDown 1s ease-out forwards;
}

.section-scroll-dark.visible::after {
  animation: scrollOverlapBarUp 1s ease-out forwards;
}

@keyframes scrollOverlapBarDown {
  to {
    transform: translateX(-50%) scaleY(1);
  }
}

@keyframes scrollOverlapBarUp {
  to {
    transform: translateX(-50%) scaleY(1);
  }
}

.scroll-dark-inner {
  max-width: 980px;
  margin: 70px auto;
  transition: opacity 0.6s ease;
  opacity: 1 !important;
  transform: none !important;
  position: relative;
  z-index: 2;
}

.scroll-dark-label {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.scroll-dark-title {
  font-size: clamp(1.5rem, 2.8vw, 2.8rem);
  font-weight: 600;
  line-height: 1.35;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 1.25rem;
}

.scroll-dark-text {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.scroll-dark-inner .letter {
  color: rgba(44, 44, 44, 0.32);
  display: inline;
}

.scroll-dark-inner .scroll-dark-text .letter {
  color: rgba(44, 44, 44, 0.28);
}

.scroll-dark-inner.visible .letter {
  animation: scrollOverlapLetterReveal 0.45s ease forwards;
}

.scroll-dark-inner.visible .scroll-dark-label .letter,
.scroll-dark-inner.visible .scroll-dark-title .letter {
  animation: scrollOverlapLetterReveal 0.4s ease forwards;
}

.scroll-dark-inner.visible .scroll-dark-text .letter {
  animation: scrollOverlapLetterRevealBody 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes scrollOverlapLetterReveal {
  to {
    color: #1a1a1a;
  }
}

@keyframes scrollOverlapLetterRevealBody {
  from {
    color: rgba(44, 44, 44, 0.28);
    opacity: 0.72;
    transform: translateY(3px);
  }

  to {
    color: rgba(26, 26, 26, 0.88);
    opacity: 1;
    transform: translateY(0);
  }
}

.btn-scroll-dark {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.5rem 1.5rem;
  border: 1px solid rgba(44, 44, 44, 0.4);
  background: transparent;
  color: rgba(44, 44, 44, 0.6);
  border-radius: 0;
  transition: color 0.4s ease, border-color 0.4s ease, background 0.4s ease;
}

.scroll-dark-inner.visible .btn-scroll-dark {
  color: #1a1a1a;
  border-color: #1a1a1a;
}

.btn-scroll-dark:hover {
  background: #1a1a1a;
  color: var(--color-gold);
  border-color: #1a1a1a;
}