/* ==========================================================================
   Animations — Subtle fade-in-on-scroll and parallax
   ========================================================================== */

/* ---- Fade In on Scroll ---- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ---- Parallax Background ---- */
.parallax {
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

/* Disable parallax on mobile for performance */
@media (max-width: 768px) {
  .parallax {
    background-attachment: scroll;
  }
}

/* ---- Stagger children ---- */
.stagger-children > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-children > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-children > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-children > *:nth-child(4) { transition-delay: 0.4s; }
.stagger-children > *:nth-child(5) { transition-delay: 0.5s; }

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
  .fade-in, .fade-in-left, .fade-in-right {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .parallax { background-attachment: scroll; }
}

/* ---- Page Transitions ---- */
body.page-enter { opacity: 0; }
body.page-visible { opacity: 1; transition: opacity 0.3s ease; }
body.page-exit  { opacity: 0; transition: opacity 0.25s ease; }