/* ============================================
   ANIMATIONS
   Keyframes, Transitions, Effects
   ============================================ */

/* ========== KEYFRAMES ========== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px var(--primary-glow);
  }
  50% {
    box-shadow: 0 0 40px var(--primary-glow);
  }
}

@keyframes blink {
  0%, 49% {
    opacity: 1;
  }
  50%, 100% {
    opacity: 0;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== ANIMATION CLASSES ========== */
.animate-fade-in {
  animation: fadeIn var(--duration-slow) var(--ease-out);
}

.animate-slide-up {
  animation: slideUp var(--duration-slow) var(--ease-out);
}

.animate-slide-in-right {
  animation: slideInRight var(--duration-slow) var(--ease-out);
}

.animate-slide-in-left {
  animation: slideInLeft var(--duration-slow) var(--ease-out);
}

.animate-scale-in {
  animation: scaleIn var(--duration-base) var(--ease-bounce);
}

.animate-bounce {
  animation: bounce 2s var(--ease-in-out) infinite;
}

.animate-pulse {
  animation: pulse 2s var(--ease-in-out) infinite;
}

.animate-glow {
  animation: glow 2s var(--ease-in-out) infinite;
}

/* ========== STAGGER DELAYS ========== */
.stagger-1 {
  animation-delay: var(--delay-100);
}

.stagger-2 {
  animation-delay: var(--delay-200);
}

.stagger-3 {
  animation-delay: var(--delay-300);
}

/* ========== TRANSITIONS ========== */
.transition-all {
  transition: all var(--duration-base) var(--ease-in-out);
}

.transition-transform {
  transition: transform var(--duration-base) var(--ease-out);
}

.transition-colors {
  transition: color var(--duration-base) var(--ease-in-out),
              background-color var(--duration-base) var(--ease-in-out),
              border-color var(--duration-base) var(--ease-in-out);
}

.transition-opacity {
  transition: opacity var(--duration-base) var(--ease-in-out);
}

/* ========== HOVER EFFECTS ========== */
.hover-lift {
  transition: transform var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.hover-scale {
  transition: transform var(--duration-base) var(--ease-out);
}

.hover-scale:hover {
  transform: scale(1.05);
}

.hover-glow {
  transition: box-shadow var(--duration-base) var(--ease-out);
}

.hover-glow:hover {
  box-shadow: var(--shadow-glow);
}

.hover-brightness {
  transition: filter var(--duration-base) var(--ease-out);
}

.hover-brightness:hover {
  filter: brightness(1.2);
}

/* ========== SCROLL REVEAL (JS CONTROLLED) ========== */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ========== LOADING STATES ========== */
@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 25%,
    var(--bg-elevated) 50%,
    var(--bg-secondary) 75%
  );
  background-size: 2000px 100%;
  animation: shimmer 2s infinite linear;
}

/* ========== PREFERS REDUCED MOTION ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .animate-bounce,
  .animate-pulse,
  .animate-glow {
    animation: none;
  }

  .scroll-reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}