/* ============================================
   SCROLL REVEAL
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity  600ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for grids */
.reveal:nth-child(1) { transition-delay:   0ms; }
.reveal:nth-child(2) { transition-delay: 100ms; }
.reveal:nth-child(3) { transition-delay: 200ms; }
.reveal:nth-child(4) { transition-delay: 300ms; }
.reveal:nth-child(5) { transition-delay: 400ms; }
.reveal:nth-child(6) { transition-delay: 500ms; }

/* ============================================
   HERO ENTRANCE ANIMATION
   ============================================ */
.hero__layer {
  opacity: 0;
  transform: translateY(12px);
}

.hero__layer.visible {
  animation: heroFadeUp 500ms ease-out forwards;
}

@keyframes heroFadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   SCROLL INDICATOR BOUNCE
   ============================================ */
.hero__scroll-indicator {
  animation: bounce 2s ease-in-out infinite;
  opacity: 0;
  transition: opacity 300ms ease;
}

.hero__scroll-indicator.visible {
  opacity: 1;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(6px); }
}

/* ============================================
   BACK TO TOP BUTTON
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-text);
  color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 300ms ease, transform 300ms ease;
  z-index: 50;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

@media (hover: hover) {
  .back-to-top:hover {
    background: var(--color-text-muted);
  }
}