/* Animations - Smooth, Natural Transitions */
/* PBS */

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

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

.fade-in {
  animation: fadeIn 0.8s ease-out;
}

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

.fade-in-down {
  animation: fadeInDown 0.6s ease-out;
}

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

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

.slide-up {
  animation: slideUp 0.8s ease-out;
}

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

.slide-down {
  animation: slideDown 0.6s ease-out;
}

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

.slide-in-left {
  animation: slideInLeft 0.8s ease-out;
}

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

.slide-in-right {
  animation: slideInRight 0.8s ease-out;
}

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

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

.scale-in {
  animation: scaleIn 0.8s ease-out;
}

@keyframes scaleUp {
  from {
    opacity: 0;
    transform: scale(0.5);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.scale-up {
  animation: scaleUp 0.6s ease-out;
}

/* ===================================
   Pulse & Float Animations
   =================================== */

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

.pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

.float {
  animation: float 6s ease-in-out infinite;
}

/* ===================================
   Gradient Animation
   =================================== */

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.gradient-animate {
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
}

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

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

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

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

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

.hover-grow {
  transition: transform var(--transition-base);
}

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

/* ===================================
   Icon Animations
   =================================== */

.icon-bounce {
  transition: transform var(--transition-fast);
}

.icon-bounce:hover {
  animation: bounce 0.6s;
}

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

.arrow-slide {
  transition: transform var(--transition-base);
}

.btn:hover .arrow-slide {
  transform: translateX(4px);
}

.icon-spin {
  transition: transform var(--transition-base);
}

.icon-spin:hover {
  transform: rotate(90deg);
}

/* ===================================
   Stagger Animations
   =================================== */

.stagger-item {
  opacity: 0;
  animation: slideUp 0.8s ease-out forwards;
}

.stagger-item:nth-child(1) { animation-delay: 0.1s; }
.stagger-item:nth-child(2) { animation-delay: 0.2s; }
.stagger-item:nth-child(3) { animation-delay: 0.3s; }
.stagger-item:nth-child(4) { animation-delay: 0.4s; }
.stagger-item:nth-child(5) { animation-delay: 0.5s; }
.stagger-item:nth-child(6) { animation-delay: 0.6s; }
.stagger-item:nth-child(7) { animation-delay: 0.7s; }
.stagger-item:nth-child(8) { animation-delay: 0.8s; }

/* ===================================
   Loading Animations
   =================================== */

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

.spinner {
  border: 3px solid var(--color-gray-200);
  border-top-color: var(--color-blue-700);
  border-radius: 50%;
  width: 24px;
  height: 24px;
  animation: spin 0.8s linear infinite;
}

/* ===================================
   Shimmer Effect
   =================================== */

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.shimmer {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.3) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* ===================================
   Page Transitions
   =================================== */

body {
  animation: fadeIn 0.5s ease-out;
}

/* Skip intro animation when arriving from spy-scroll */
body.no-intro-animation {
  animation: none;
}

/* Page transition fade effect */
body.page-transitioning {
  animation: pageTransitionOut 0.3s ease-out forwards;
}

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

/* ===================================
   Accessibility - Reduced Motion
   =================================== */

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