/* ============================================
   ANIMATIONS & KEYFRAMES
   ============================================ */

/* --- Fade In Up --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* --- Slide In --- */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* --- Toast --- */
@keyframes toastSlideIn {
  from {
    transform: translateX(120%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toastSlideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(120%);
    opacity: 0;
  }
}

/* --- Scale --- */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes scalePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* --- Hero Glow --- */
@keyframes heroGlow {
  0% {
    transform: rotate(0deg) scale(1);
  }
  50% {
    transform: rotate(5deg) scale(1.05);
  }
  100% {
    transform: rotate(-3deg) scale(1.02);
  }
}

/* --- Sparkle Float --- */
@keyframes sparkleFloat {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  25% {
    transform: translateY(-20px) rotate(5deg);
  }
  50% {
    transform: translateY(-10px) rotate(-3deg);
  }
  75% {
    transform: translateY(-25px) rotate(3deg);
  }
}

/* --- Logo Pulse --- */
@keyframes logoPulse {
  0%, 100% {
    transform: scale(1);
    filter: drop-shadow(0 0 0 rgba(66, 133, 244, 0));
  }
  50% {
    transform: scale(1.05);
    filter: drop-shadow(0 0 20px rgba(66, 133, 244, 0.3));
  }
}

/* --- Sparkle Rotate (Loader) --- */
@keyframes sparkleRotate {
  0% {
    transform: rotate(0deg) scale(1);
  }
  25% {
    transform: rotate(90deg) scale(1.1);
  }
  50% {
    transform: rotate(180deg) scale(1);
  }
  75% {
    transform: rotate(270deg) scale(1.1);
  }
  100% {
    transform: rotate(360deg) scale(1);
  }
}

/* --- Shimmer (Skeleton) --- */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* --- Counter Roll --- */
@keyframes countUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Gradient Shift --- */
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* --- Success Check --- */
@keyframes successCheck {
  0% {
    transform: scale(0) rotate(-45deg);
    opacity: 0;
  }
  50% {
    transform: scale(1.2) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: scale(1) rotate(0deg);
    opacity: 1;
  }
}

/* ============================================
   ANIMATION UTILITY CLASSES
   ============================================ */

.animate-fade-in {
  animation: fadeIn 0.4s ease forwards;
}

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

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

.animate-slide-in-left {
  animation: slideInLeft 0.5s ease forwards;
}

.animate-slide-in-right {
  animation: slideInRight 0.5s ease forwards;
}

.animate-scale-in {
  animation: scaleIn 0.3s var(--transition-spring) forwards;
}

/* --- Stagger children animation --- */
.stagger-children > * {
  opacity: 0;
  animation: fadeInUp 0.4s ease forwards;
}

.stagger-children > *:nth-child(1) { animation-delay: 0ms; }
.stagger-children > *:nth-child(2) { animation-delay: 60ms; }
.stagger-children > *:nth-child(3) { animation-delay: 120ms; }
.stagger-children > *:nth-child(4) { animation-delay: 180ms; }
.stagger-children > *:nth-child(5) { animation-delay: 240ms; }
.stagger-children > *:nth-child(6) { animation-delay: 300ms; }
.stagger-children > *:nth-child(7) { animation-delay: 360ms; }
.stagger-children > *:nth-child(8) { animation-delay: 420ms; }
.stagger-children > *:nth-child(9) { animation-delay: 480ms; }
.stagger-children > *:nth-child(10) { animation-delay: 540ms; }

/* --- Page transition --- */
.page-enter {
  animation: fadeInUp 0.35s ease forwards;
}

.page-exit {
  animation: fadeOut 0.15s ease forwards;
}

/* --- Hover lift --- */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

/* --- Gradient border animation --- */
.gradient-border {
  position: relative;
  background: var(--bg-primary);
}

.gradient-border::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--gemini-gradient-shine);
  background-size: 300% 300%;
  border-radius: inherit;
  z-index: -1;
  animation: gradientShift 4s ease infinite;
}

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