/* ================================================
   MEKONG AGENCY - ANIMATIONS & LOADING STATES
   Enhanced UI Animations for Sa Đéc Marketing Hub
   ================================================ */

/* ============================================================================
   CSS CUSTOM PROPERTIES FOR ANIMATIONS
   ============================================================================ */

:root {
  /* Animation Durations */
  --anim-duration-fast: 150ms;
  --anim-duration-normal: 300ms;
  --anim-duration-slow: 500ms;
  --anim-duration-slower: 800ms;

  /* Animation Easing */
  --anim-easing-default: cubic-bezier(0.4, 0, 0.2, 1);
  --anim-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
  --anim-easing-decelerated: cubic-bezier(0, 0, 0.2, 1);
  --anim-easing-accelerated: cubic-bezier(0.4, 0, 1, 1);

  /* Animation Delays */
  --anim-delay-1: 0ms;
  --anim-delay-2: 50ms;
  --anim-delay-3: 100ms;
  --anim-delay-4: 150ms;
  --anim-delay-5: 200ms;

  /* Loading Colors */
  --loading-primary: var(--md-sys-color-primary, #006A60);
  --loading-secondary: var(--md-sys-color-secondary, #9C6800);
  --loading-surface: var(--md-sys-color-surface-variant, #DAE5E2);
}

/* ============================================================================
   PAGE TRANSITION ANIMATIONS
   ============================================================================ */

/* Fade In on Page Load */
@keyframes pageFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Slide Up on Page Load */
@keyframes slideUpFade {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Slide In from Left */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Slide In from Right */
@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* Apply to body */
body {
  animation: pageFadeIn var(--anim-duration-normal) var(--anim-easing-default);
}

/* ============================================================================
   ENTRY ANIMATIONS (Scroll-triggered via JS)
   ============================================================================ */

.animate-entry {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--anim-duration-slow) var(--anim-easing-decelerated),
              transform var(--anim-duration-slow) var(--anim-easing-decelerated);
}

.animate-entry.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Premium staggered animations */
.animate-entry-premium {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--anim-duration-slower) var(--anim-easing-emphasized),
              transform var(--anim-duration-slower) var(--anim-easing-emphasized);
}

.animate-entry-premium.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for cards/lists */
.animate-entry.delay-1 { --anim-delay-1: 0ms; transition-delay: var(--anim-delay-1); }
.animate-entry.delay-2 { --anim-delay-2: 100ms; transition-delay: var(--anim-delay-2); }
.animate-entry.delay-3 { --anim-delay-3: 200ms; transition-delay: var(--anim-delay-3); }
.animate-entry.delay-4 { --anim-delay-4: 300ms; transition-delay: var(--anim-delay-4); }
.animate-entry.delay-5 { --anim-delay-5: 400ms; transition-delay: var(--anim-delay-5); }

/* Slide from left variant */
.animate-from-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity var(--anim-duration-normal) var(--anim-easing-decelerated),
              transform var(--anim-duration-normal) var(--anim-easing-decelerated);
}

.animate-from-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Slide from right variant */
.animate-from-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--anim-duration-normal) var(--anim-easing-decelerated),
              transform var(--anim-duration-normal) var(--anim-easing-decelerated);
}

.animate-from-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale variant */
.animate-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity var(--anim-duration-normal) var(--anim-easing-decelerated),
              transform var(--anim-duration-normal) var(--anim-easing-decelerated);
}

.animate-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* ============================================================================
   LOADING SPINNERS
   ============================================================================ */

/* Primary Spinner */
.spinner-primary {
  width: 40px;
  height: 40px;
  border: 3px solid var(--loading-surface);
  border-top-color: var(--loading-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Secondary Spinner */
.spinner-secondary {
  width: 40px;
  height: 40px;
  border: 3px solid var(--loading-surface);
  border-top-color: var(--loading-secondary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Small Spinner */
.spinner-small {
  width: 24px;
  height: 24px;
  border: 2px solid var(--loading-surface);
  border-top-color: var(--loading-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* Large Spinner */
.spinner-large {
  width: 64px;
  height: 64px;
  border: 4px solid var(--loading-surface);
  border-top-color: var(--loading-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Pulse Spinner */
.spinner-pulse {
  width: 40px;
  height: 40px;
  background: var(--loading-primary);
  border-radius: 50%;
  animation: pulse 1.5s ease-in-out infinite;
}

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

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.7;
  }
}

/* ============================================================================
   SKELETON LOADERS
   ============================================================================ */

.skeleton-base {
  background: linear-gradient(
    90deg,
    var(--md-sys-color-surface-variant) 25%,
    color-mix(in srgb, var(--md-sys-color-outline-variant) 50%, var(--md-sys-color-surface-variant)) 50%,
    var(--md-sys-color-surface-variant) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--md-sys-shape-corner-medium);
}

@keyframes skeleton-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Skeleton Variants */
.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.skeleton-title {
  height: 24px;
  width: 60%;
  margin-bottom: 12px;
}

.skeleton-text {
  height: 16px;
  width: 100%;
  margin-bottom: 8px;
}

.skeleton-text-short {
  width: 70%;
}

.skeleton-card {
  padding: 24px;
  background: var(--md-sys-color-surface);
  border-radius: var(--md-sys-shape-corner-large);
}

.skeleton-stat-card {
  padding: 24px;
}

.skeleton-stat-card .skeleton-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  margin-bottom: 16px;
}

.skeleton-stat-card .skeleton-value {
  height: 36px;
  width: 80px;
  margin-bottom: 8px;
}

.skeleton-stat-card .skeleton-label {
  height: 14px;
  width: 100px;
}

.skeleton-table-row {
  display: flex;
  gap: 16px;
  padding: 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.skeleton-table-cell {
  flex: 1;
  height: 20px;
}

/* ============================================================================
   PROGRESS BARS
   ============================================================================ */

/* Linear Progress Bar */
.progress-linear {
  width: 100%;
  height: 4px;
  background: var(--md-sys-color-surface-variant);
  border-radius: var(--md-sys-shape-corner-full);
  overflow: hidden;
  position: relative;
}

.progress-linear-fill {
  height: 100%;
  background: var(--md-sys-color-primary);
  border-radius: var(--md-sys-shape-corner-full);
  transition: width var(--anim-duration-normal) var(--anim-easing-default);
}

/* Indeterminate animation */
.progress-linear.indeterminate .progress-linear-fill {
  width: 30%;
  animation: progress-indeterminate 1.5s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes progress-indeterminate {
  0% {
    left: -30%;
  }
  50% {
    left: 100%;
  }
  100% {
    left: -30%;
  }
}

/* Circular Progress */
.progress-circular {
  width: 48px;
  height: 48px;
  position: relative;
}

.progress-circular svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progress-circular-track {
  fill: none;
  stroke: var(--md-sys-color-surface-variant);
  stroke-width: 4;
}

.progress-circular-indicator {
  fill: none;
  stroke: var(--md-sys-color-primary);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 126;
  stroke-dashoffset: 126;
  transition: stroke-dashoffset var(--anim-duration-normal) var(--anim-easing-default);
}

/* ============================================================================
   BUTTON LOADING STATES
   ============================================================================ */

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

.btn-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  color: var(--md-sys-color-on-primary);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* ============================================================================
   CARD HOVER ANIMATIONS
   ============================================================================ */

.card-hover-lift {
  transition: transform var(--anim-duration-normal) var(--anim-easing-emphasized),
              box-shadow var(--anim-duration-normal) var(--anim-easing-emphasized);
}

.card-hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--md-sys-elevation-3);
}

.card-hover-glow {
  transition: box-shadow var(--anim-duration-normal) var(--anim-easing-emphasized);
}

.card-hover-glow:hover {
  box-shadow: 0 0 20px color-mix(in srgb, var(--md-sys-color-primary) 30%, transparent);
}

.card-hover-scale {
  transition: transform var(--anim-duration-normal) var(--anim-easing-emphasized);
}

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

/* ============================================================================
   RIPPLE EFFECT
   ============================================================================ */

.ripple-container {
  position: relative;
  overflow: hidden;
}

.ripple {
  position: absolute;
  border-radius: 50%;
  background: color-mix(in srgb, var(--md-sys-color-primary) 20%, transparent);
  transform: scale(0);
  animation: ripple-animation 0.6s ease-out;
  pointer-events: none;
}

@keyframes ripple-animation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ============================================================================
   BADGE ANIMATIONS
   ============================================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--md-sys-shape-corner-full);
  font: var(--md-sys-typescale-label-small);
  font-weight: 500;
}

.badge-pulse {
  animation: badge-pulse 2s ease-in-out infinite;
}

@keyframes badge-pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

/* Status Badges */
.badge-success {
  background: color-mix(in srgb, #34C759 20%, transparent);
  color: #34C759;
}

.badge-warning {
  background: color-mix(in srgb, #FF9500 20%, transparent);
  color: #FF9500;
}

.badge-error {
  background: color-mix(in srgb, #FF3B30 20%, transparent);
  color: #FF3B30;
}

.badge-info {
  background: color-mix(in srgb, var(--md-sys-color-primary) 20%, transparent);
  color: var(--md-sys-color-primary);
}

/* ============================================================================
   MODAL ANIMATIONS
   ============================================================================ */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: opacity var(--anim-duration-normal) var(--anim-easing-default);
}

.modal-backdrop.visible {
  opacity: 1;
}

.modal-content {
  transform: scale(0.9) translateY(20px);
  opacity: 0;
  transition: transform var(--anim-duration-slow) var(--anim-easing-emphasized),
              opacity var(--anim-duration-slow) var(--anim-easing-emphasized);
}

.modal-content.visible {
  transform: scale(1) translateY(0);
  opacity: 1;
}

/* ============================================================================
   TOAST/SNACKBAR ANIMATIONS
   ============================================================================ */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  opacity: 0;
  transition: transform var(--anim-duration-slow) var(--anim-easing-emphasized),
              opacity var(--anim-duration-slow) var(--anim-easing-emphasized);
  background: var(--md-sys-color-inverse-surface);
  color: var(--md-sys-color-inverse-on-surface);
  padding: 14px 24px;
  border-radius: var(--md-sys-shape-corner-medium);
  box-shadow: var(--md-sys-elevation-3);
}

.toast.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.hiding {
  transform: translateX(-50%) translateY(100px);
  opacity: 0;
}

/* ============================================================================
   ACCORDION/COLLAPSE ANIMATIONS
   ============================================================================ */

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--anim-duration-slow) var(--anim-easing-emphasized);
}

.accordion-content.expanded {
  max-height: 1000px;
}

.accordion-icon {
  transition: transform var(--anim-duration-normal) var(--anim-easing-default);
}

.accordion-icon.expanded {
  transform: rotate(180deg);
}

/* ============================================================================
   TAB ANIMATIONS
   ============================================================================ */

.tab-indicator {
  position: absolute;
  bottom: 0;
  height: 3px;
  background: var(--md-sys-color-primary);
  border-radius: var(--md-sys-shape-corner-full);
  transition: transform var(--anim-duration-normal) var(--anim-easing-emphasized),
              width var(--anim-duration-normal) var(--anim-easing-emphasized);
}

/* ============================================================================
   LIST ITEM ANIMATIONS
   ============================================================================ */

.list-item {
  transition: background-color var(--anim-duration-fast) var(--anim-easing-default),
              transform var(--anim-duration-fast) var(--anim-easing-default);
}

.list-item:hover {
  background-color: color-mix(in srgb, var(--md-sys-color-primary) 8%, transparent);
}

.list-item.slide-in {
  opacity: 0;
  transform: translateX(-20px);
  animation: listSlideIn var(--anim-duration-normal) var(--anim-easing-decelerated) forwards;
}

@keyframes listSlideIn {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Stagger animation for lists */
.list-item:nth-child(1) { animation-delay: 0ms; }
.list-item:nth-child(2) { animation-delay: 50ms; }
.list-item:nth-child(3) { animation-delay: 100ms; }
.list-item:nth-child(4) { animation-delay: 150ms; }
.list-item:nth-child(5) { animation-delay: 200ms; }
.list-item:nth-child(n+6) { animation-delay: 250ms; }

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

/* Visibility */
.hidden {
  display: none !important;
}

.invisible {
  visibility: hidden;
}

.visible {
  visibility: visible;
}

/* Loading overlay */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, var(--md-sys-color-surface) 90%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(4px);
}

/* No scroll when loading */
.body-no-scroll {
  overflow: hidden;
}

/* ============================================================================
   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-entry,
  .animate-entry-premium,
  .animate-from-left,
  .animate-from-right,
  .animate-scale {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ============================================================================
   PRINT STYLES
   ============================================================================ */

@media print {
  .animate-entry,
  .animate-entry-premium,
  .animate-from-left,
  .animate-from-right,
  .animate-scale {
    opacity: 1;
    transform: none;
  }

  .loading-overlay,
  .spinner-primary,
  .spinner-secondary,
  .spinner-small,
  .spinner-large {
    display: none;
  }
}