/* ==========================================================================
   REVEAL ANIMATIONS
   Scroll-triggered fade-in animations
   ========================================================================== */

/* Base State - Hidden */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

/* Revealed State - Visible */
.reveal.revealed,
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Variants */
.reveal--left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal--left.revealed,
.reveal--left.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal--right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal--right.revealed,
.reveal--right.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal--scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal--scale.revealed,
.reveal--scale.active {
  opacity: 1;
  transform: scale(1);
}

/* No JavaScript Fallback - Show content immediately */
.no-js .reveal,
.no-js .reveal--left,
.no-js .reveal--right,
.no-js .reveal--scale {
  opacity: 1;
  transform: none;
}

/* Reduced Motion - No animation */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal--left,
  .reveal--right,
  .reveal--scale {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ========================================================================
   KEYFRAME ANIMATIONS (Utility Classes)
   ======================================================================== */

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Animation Utility Classes */
.animate-fade-up {
  animation: fade-up 0.6s ease-out forwards;
}

.animate-fade-in {
  animation: fade-in 0.5s ease-out forwards;
}

.animate-scale-in {
  animation: scale-in 0.5s ease-out forwards;
}

/* Animation Delays */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }

/* Reduced Motion - Disable animations */
@media (prefers-reduced-motion: reduce) {
  .animate-fade-up,
  .animate-fade-in,
  .animate-scale-in {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

/* ========================================================================
   LOADING SKELETON
   For content placeholders
   ========================================================================== */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 25%,
    var(--bg-elevated) 50%,
    var(--bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .skeleton {
    animation: none;
    background: var(--bg-tertiary);
  }
}