/* ==========================================================================
   Animations - Scroll Effects, Transitions, and Keyframes
   ========================================================================== */

/* ==========================================================================
   Scroll-triggered Animations
   ========================================================================== */

/* Elements waiting to animate in */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

/* Animated state */
.animate-on-scroll.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animations for children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.stagger-children.animate-in > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children.animate-in > *:nth-child(2) { transition-delay: 100ms; }
.stagger-children.animate-in > *:nth-child(3) { transition-delay: 200ms; }
.stagger-children.animate-in > *:nth-child(4) { transition-delay: 300ms; }
.stagger-children.animate-in > *:nth-child(5) { transition-delay: 400ms; }
.stagger-children.animate-in > *:nth-child(6) { transition-delay: 500ms; }

.stagger-children.animate-in > * {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Fade Animations
   ========================================================================== */

.fade-in {
  animation: fadeIn var(--transition-slow) ease forwards;
}

.fade-in-up {
  animation: fadeInUp var(--transition-slow) ease forwards;
}

.fade-in-down {
  animation: fadeInDown var(--transition-slow) ease forwards;
}

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

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

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

/* ==========================================================================
   Scale Animations
   ========================================================================== */

.scale-in {
  animation: scaleIn var(--transition-normal) ease forwards;
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ==========================================================================
   Hero Animations
   ========================================================================== */

.hero__tagline {
  animation: fadeInDown 0.6s ease forwards;
  animation-delay: 0.1s;
  opacity: 0;
}

.hero__title {
  animation: fadeInUp 0.6s ease forwards;
  animation-delay: 0.2s;
  opacity: 0;
}

.hero__subtitle {
  animation: fadeInUp 0.6s ease forwards;
  animation-delay: 0.3s;
  opacity: 0;
}

.hero .btn-group {
  animation: fadeInUp 0.6s ease forwards;
  animation-delay: 0.4s;
  opacity: 0;
}

/* ==========================================================================
   Pulse Animation (for highlights)
   ========================================================================== */

.pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* ==========================================================================
   Slide Animations
   ========================================================================== */

.slide-in-left {
  animation: slideInLeft var(--transition-slow) ease forwards;
}

.slide-in-right {
  animation: slideInRight var(--transition-slow) ease forwards;
}

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

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

/* ==========================================================================
   Hover Effects
   ========================================================================== */

/* Lift effect on hover */
.hover-lift {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

/* Scale effect on hover */
.hover-scale {
  transition: transform var(--transition-fast);
}

.hover-scale:hover {
  transform: scale(1.02);
}

/* Glow effect on hover */
.hover-glow {
  transition: box-shadow var(--transition-normal);
}

.hover-glow:hover {
  box-shadow: 0 0 20px rgba(37, 99, 235, 0.3);
}

/* ==========================================================================
   Button Animations
   ========================================================================== */

.btn {
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease;
}

.btn:active::after {
  width: 300px;
  height: 300px;
}

/* ==========================================================================
   Loading States
   ========================================================================== */

.loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ==========================================================================
   Reduced Motion Support
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .animate-on-scroll,
  .stagger-children > *,
  .fade-in,
  .fade-in-up,
  .fade-in-down,
  .scale-in,
  .slide-in-left,
  .slide-in-right,
  .hero__tagline,
  .hero__title,
  .hero__subtitle,
  .hero .btn-group {
    animation: none;
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hover-lift:hover,
  .hover-scale:hover {
    transform: none;
  }

  .pulse {
    animation: none;
  }
}

/* ==========================================================================
   Page Transition (optional enhancement)
   ========================================================================== */

.page-transition-enter {
  opacity: 0;
}

.page-transition-enter-active {
  opacity: 1;
  transition: opacity 300ms ease;
}

.page-transition-exit {
  opacity: 1;
}

.page-transition-exit-active {
  opacity: 0;
  transition: opacity 300ms ease;
}