/* ============================================
   Enhanced Skeleton Loaders & Loading States
   ============================================ */
.skeleton-card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.skeleton-tour-card {
  background: var(--bg-primary);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.skeleton-tour-image {
  width: 100%;
  height: 16rem;
  background: linear-gradient(90deg,
      var(--gray-200) 0%,
      var(--gray-100) 50%,
      var(--gray-200) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

.skeleton-tour-content {
  padding: var(--space-6);
}

.skeleton-line {
  height: 1rem;
  background: linear-gradient(90deg,
      var(--gray-200) 0%,
      var(--gray-100) 50%,
      var(--gray-200) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

.skeleton-line.short {
  width: 60%;
}

.skeleton-line.medium {
  width: 80%;
}

.skeleton-circle {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg,
      var(--gray-200) 0%,
      var(--gray-100) 50%,
      var(--gray-200) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

/* ============================================
   Enhanced Micro-interactions
   ============================================ */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.hover-glow {
  position: relative;
  transition: all var(--transition-base);
}

.hover-glow::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: linear-gradient(45deg, #3B82F6, #8B5CF6, #EC4899);
  opacity: 0;
  z-index: -1;
  filter: blur(20px);
  transition: opacity var(--transition-base);
}

.hover-glow:hover::after {
  opacity: 0.7;
}

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

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

.hover-rotate {
  transition: transform var(--transition-slow);
}

.hover-rotate:hover {
  transform: rotate(3deg);
}

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

.hover-brightness:hover {
  filter: brightness(1.1);
}

/* Button Ripple Effect */
.btn-ripple {
  position: relative;
  overflow: hidden;
}

.btn-ripple::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-ripple:active::before {
  width: 300px;
  height: 300px;
}

/* Floating Animation */
.float-animation {
  animation: float 6s ease-in-out infinite;
}

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

/* Bounce on Hover */
.bounce-hover {
  transition: transform var(--transition-bounce);
}

.bounce-hover:hover {
  animation: bounce 0.5s;
}

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

/* Shake Animation for Errors */
.shake {
  animation: shake 0.5s;
}

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  10%, 30%, 50%, 70%, 90% {
    transform: translateX(-10px);
  }
  20%, 40%, 60%, 80% {
    transform: translateX(10px);
  }
}

/* Gradient Border Animation */
.gradient-border {
  position: relative;
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
}

.gradient-border::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 2px;
  background: linear-gradient(45deg, #3B82F6, #8B5CF6, #EC4899, #3B82F6);
  background-size: 300% 300%;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: gradient-rotate 3s linear infinite;
}

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

/* ============================================
   Enhanced Focus States for Accessibility
   ============================================ */
*:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* ============================================
   Loading Spinner
   ============================================ */
.loading-spinner {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-spinner-lg {
  width: 3rem;
  height: 3rem;
  border-width: 4px;
}

/* ============================================
   Back to Top Button Styles
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-xl);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(100px);
  transition: all var(--transition-base);
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2xl);
}

@media (max-width: 768px) {
  .back-to-top {
    bottom: 5rem;
    right: 1rem;
    width: 2.5rem;
    height: 2.5rem;
  }
}

/* ============================================
   Image Blur-up Loading Effect
   ============================================ */
.img-blur-up {
  filter: blur(20px);
  transition: filter 0.3s ease-out;
}

.img-blur-up.loaded {
  filter: blur(0);
}

/* ============================================
   Stagger Animation Delays
   ============================================ */
.stagger-1 {
  animation-delay: 100ms;
}

.stagger-2 {
  animation-delay: 200ms;
}

.stagger-3 {
  animation-delay: 300ms;
}

.stagger-4 {
  animation-delay: 400ms;
}

.stagger-5 {
  animation-delay: 500ms;
}

.stagger-6 {
  animation-delay: 600ms;
}

/* ============================================
   Performance Optimizations
   ============================================ */
.will-change-transform {
  will-change: transform;
}

.will-change-opacity {
  will-change: opacity;
}

.gpu-accelerated {
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}

/* ============================================
   Reduced Motion Support
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .animate-float,
  .float-animation {
    animation: none !important;
  }
}