/* ==========================================================================
   Animations — Scroll fade-in via IntersectionObserver
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.2s; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.3s; }
.reveal-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Ridge line SVG stroke animation */
@keyframes ridge-draw {
  to { stroke-dashoffset: 0; }
}
.ridge-line path {
  stroke-dasharray: 2000;
  stroke-dashoffset: 2000;
  animation: ridge-draw 3s ease forwards;
}

/* Parallax helper — applied via JS */
.parallax {
  will-change: transform;
}