/* ============================================
   SCROLL ANIMATIONS - Modern Fade & Reveal
   ============================================ */

/* Base state - elements start invisible */
.scroll-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Animated state - when element enters viewport */
.scroll-animate.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   ANIMATION VARIANTS
   ============================================ */

/* Fade up (default) */
.scroll-fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.scroll-fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Fade in (no movement) */
.scroll-fade-in {
  opacity: 0;
  transition: opacity 0.8s ease-out;
}

.scroll-fade-in.is-visible {
  opacity: 1;
}

/* Fade from left */
.scroll-fade-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

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

/* Fade from right */
.scroll-fade-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

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

/* Scale up effect */
.scroll-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Blur reveal effect */
.scroll-blur {
  opacity: 0;
  filter: blur(10px);
  transform: translateY(20px);
  transition: opacity 0.8s ease-out, filter 0.8s ease-out, transform 0.8s ease-out;
}

.scroll-blur.is-visible {
  opacity: 1;
  filter: blur(0);
  transform: translateY(0);
}

/* ============================================
   STAGGER CHILDREN - For lists/grids
   ============================================ */

.scroll-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.scroll-stagger.is-visible > *:nth-child(1) { transition-delay: 0.1s; }
.scroll-stagger.is-visible > *:nth-child(2) { transition-delay: 0.2s; }
.scroll-stagger.is-visible > *:nth-child(3) { transition-delay: 0.3s; }
.scroll-stagger.is-visible > *:nth-child(4) { transition-delay: 0.4s; }
.scroll-stagger.is-visible > *:nth-child(5) { transition-delay: 0.5s; }
.scroll-stagger.is-visible > *:nth-child(6) { transition-delay: 0.6s; }

.scroll-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   TIMING MODIFIERS
   ============================================ */

.delay-100 { transition-delay: 0.1s !important; }
.delay-200 { transition-delay: 0.2s !important; }
.delay-300 { transition-delay: 0.3s !important; }
.delay-400 { transition-delay: 0.4s !important; }
.delay-500 { transition-delay: 0.5s !important; }

.duration-fast { transition-duration: 0.4s !important; }
.duration-slow { transition-duration: 1.2s !important; }

/* ============================================
   ACCESSIBILITY - Respect reduced motion
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  .scroll-animate,
  .scroll-fade-up,
  .scroll-fade-in,
  .scroll-fade-left,
  .scroll-fade-right,
  .scroll-scale,
  .scroll-blur,
  .scroll-stagger > * {
    opacity: 1;
    transform: none;
    filter: none;
    transition: none;
  }
}