/**
 * ═══════════════════════════════════════════════════════════════════════════
 * SA ĐÉC MARKETING HUB - UI ENHANCEMENTS 2027
 * Advanced Micro-animations, Loading States & Hover Effects
 *
 * Categories:
 *   - Enhanced Hover Effects (buttons, links, cards, navigation)
 *   - Advanced Loading States (spinners, skeletons, progress bars)
 *   - Micro-interactions (click ripples, focus rings, success animations)
 *   - Scroll Animations (fade-in, slide-up, stagger)
 * ═══════════════════════════════════════════════════════════════════════════
 */

/* ═══════════════════════════════════════════════════════════════════════════
   CSS CUSTOM PROPERTIES
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  /* Enhanced Animation Durations */
  --anim-duration-ultra-fast: 100ms;
  --anim-duration-fast: 200ms;
  --anim-duration-normal: 300ms;
  --anim-duration-slow: 500ms;
  --anim-duration-slower: 700ms;
  --anim-duration-very-slow: 1000ms;

  /* Enhanced Easing Curves */
  --anim-easing-standard: 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);
  --anim-easing-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --anim-easing-elastic: cubic-bezier(0.175, 0.885, 0.32, 1.275);

  /* Stagger Delays */
  --stagger-1: 0ms;
  --stagger-2: 50ms;
  --stagger-3: 100ms;
  --stagger-4: 150ms;
  --stagger-5: 200ms;
  --stagger-6: 250ms;

  /* Glow Colors */
  --glow-primary: rgba(0, 106, 96, 0.4);
  --glow-secondary: rgba(156, 104, 0, 0.4);
  --glow-success: rgba(52, 199, 89, 0.4);
  --glow-error: rgba(255, 59, 48, 0.4);
  --glow-warning: rgba(255, 149, 0, 0.4);
}

/* ═══════════════════════════════════════════════════════════════════════════
   ENHANCED BUTTON HOVER EFFECTS
   ═══════════════════════════════════════════════════════════════════════════ */

/* Primary Button - Premium Hover */
.btn-primary-enhanced {
  position: relative;
  overflow: hidden;
  transition: all var(--anim-duration-fast) var(--anim-easing-emphasized);
}

.btn-primary-enhanced::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--anim-duration-slow) var(--anim-easing-decelerated);
}

.btn-primary-enhanced:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 24px var(--glow-primary),
              0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary-enhanced:hover::before {
  left: 100%;
}

.btn-primary-enhanced:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 2px 8px var(--glow-primary);
}

/* Secondary Button - Pulse Hover */
.btn-secondary-pulse {
  position: relative;
  transition: all var(--anim-duration-fast) var(--anim-easing-standard);
}

.btn-secondary-pulse::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: currentColor;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--anim-duration-normal) var(--anim-easing-emphasized);
}

.btn-secondary-pulse:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--glow-secondary);
}

.btn-secondary-pulse:hover::after {
  opacity: 0.1;
  transform: scale(1);
}

/* Icon Button - Rotate Hover */
.btn-icon-rotate {
  transition: transform var(--anim-duration-fast) var(--anim-easing-bounce);
}

.btn-icon-rotate:hover {
  transform: rotate(15deg) scale(1.1);
}

/* Loading Button State */
.btn-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin var(--anim-duration-slow) linear infinite;
  top: 50%;
  left: 50%;
  margin: -10px 0 0 -10px;
}

/* ═══════════════════════════════════════════════════════════════════════════
   ENHANCED CARD HOVER EFFECTS
   ═══════════════════════════════════════════════════════════════════════════ */

/* Premium Card - Multi-layer Shadow */
.card-premium {
  position: relative;
  transition: all var(--anim-duration-normal) var(--anim-easing-emphasized);
}

.card-premium::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(0, 106, 96, 0.1), rgba(156, 104, 0, 0.05));
  opacity: 0;
  transition: opacity var(--anim-duration-normal) var(--anim-easing-standard);
  z-index: -1;
}

.card-premium:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow:
    0 20px 60px rgba(0, 106, 96, 0.2),
    0 10px 30px rgba(0, 0, 0, 0.1),
    0 0 0 1px rgba(0, 106, 96, 0.1);
}

.card-premium:hover::before {
  opacity: 1;
}

/* Card with Image - Zoom Effect */
.card-image-zoom {
  overflow: hidden;
}

.card-image-zoom img {
  transition: transform var(--anim-duration-slower) var(--anim-easing-emphasized);
}

.card-image-zoom:hover img {
  transform: scale(1.08);
}

/* Card Stagger Animation */
.card-stagger {
  opacity: 0;
  transform: translateY(20px);
  animation: cardStagger var(--anim-duration-slower) var(--anim-easing-emphasized) forwards;
}

.card-stagger:nth-child(1) { animation-delay: var(--stagger-1); }
.card-stagger:nth-child(2) { animation-delay: var(--stagger-2); }
.card-stagger:nth-child(3) { animation-delay: var(--stagger-3); }
.card-stagger:nth-child(4) { animation-delay: var(--stagger-4); }
.card-stagger:nth-child(5) { animation-delay: var(--stagger-5); }
.card-stagger:nth-child(6) { animation-delay: var(--stagger-6); }

@keyframes cardStagger {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   NAVIGATION HOVER EFFECTS
   ═══════════════════════════════════════════════════════════════════════════ */

/* Nav Link - Underline Slide */
.nav-link-underline {
  position: relative;
  display: inline-block;
}

.nav-link-underline::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: currentColor;
  transition: width var(--anim-duration-normal) var(--anim-easing-emphasized);
}

.nav-link-underline:hover::after {
  width: 100%;
}

/* Nav Link - Fill Background */
.nav-link-fill {
  position: relative;
  overflow: hidden;
}

.nav-link-fill::before {
  content: '';
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--anim-duration-fast) var(--anim-easing-emphasized),
              opacity var(--anim-duration-fast) var(--anim-easing-standard);
}

.nav-link-fill:hover::before {
  opacity: 0.08;
  transform: scaleX(1);
}

/* Sidebar Item - Slide Indicator */
.sidebar-item {
  position: relative;
  transition: all var(--anim-duration-fast) var(--anim-easing-standard);
}

.sidebar-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 60%;
  background: var(--md-sys-color-primary);
  border-radius: 0 4px 4px 0;
  transition: width var(--anim-duration-fast) var(--anim-easing-emphasized);
}

.sidebar-item:hover {
  background: rgba(0, 106, 96, 0.08);
  padding-left: 8px;
}

.sidebar-item:hover::before {
  width: 4px;
}

.sidebar-item.active::before {
  width: 4px;
}

/* ═══════════════════════════════════════════════════════════════════════════
   ADVANCED LOADING STATES
   ═══════════════════════════════════════════════════════════════════════════ */

/* Modern Spinner */
.spinner-modern {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(0, 106, 96, 0.1);
  border-top-color: var(--md-sys-color-primary);
  border-radius: 50%;
  animation: spin var(--anim-duration-slow) linear infinite;
}

.spinner-modern.sm {
  width: 24px;
  height: 24px;
  border-width: 2px;
}

.spinner-modern.lg {
  width: 60px;
  height: 60px;
  border-width: 4px;
}

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

/* Pulsing Dots */
.loading-dots {
  display: flex;
  gap: 4px;
  align-items: center;
  justify-content: center;
}

.loading-dots span {
  width: 8px;
  height: 8px;
  background: var(--md-sys-color-primary);
  border-radius: 50%;
  animation: pulse 1.4s var(--anim-easing-standard) infinite;
}

.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes pulse {
  0%, 80%, 100% {
    transform: scale(0.6);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Skeleton Loader - Shimmer Effect */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--md-sys-color-surface-variant) 25%,
    var(--md-sys-color-outline-variant) 50%,
    var(--md-sys-color-surface-variant) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s var(--anim-easing-standard) infinite;
  border-radius: var(--md-sys-shape-corner-medium);
}

.skeleton.text {
  height: 16px;
  width: 100%;
}

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

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

.skeleton.card {
  height: 200px;
  width: 100%;
}

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

/* Progress Bar - Animated */
.progress-bar {
  position: relative;
  height: 4px;
  background: var(--md-sys-color-surface-variant);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--md-sys-color-primary), var(--md-sys-color-primary-container));
  transition: width var(--anim-duration-slower) var(--anim-easing-emphasized);
}

.progress-bar.indeterminate::after {
  animation: progressIndeterminate 2s var(--anim-easing-standard) infinite;
}

@keyframes progressIndeterminate {
  0% {
    width: 0;
    left: 0;
  }
  50% {
    width: 50%;
    left: 25%;
  }
  100% {
    width: 0;
    left: 100%;
  }
}

/* Page Loader - Full Screen */
.page-loader {
  position: fixed;
  inset: 0;
  background: var(--md-sys-color-surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity var(--anim-duration-normal) var(--anim-easing-standard),
              visibility var(--anim-duration-normal) var(--anim-easing-standard);
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

/* ═══════════════════════════════════════════════════════════════════════════
   MICRO-INTERACTIONS
   ═══════════════════════════════════════════════════════════════════════════ */

/* Click Ripple Effect */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: scale(0);
  animation: rippleEffect 0.6s var(--anim-easing-decelerated);
}

@keyframes rippleEffect {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Focus Ring - Enhanced */
.focus-ring {
  outline: none;
  transition: box-shadow var(--anim-duration-fast) var(--anim-easing-standard);
}

.focus-ring:focus-visible {
  box-shadow: 0 0 0 3px rgba(0, 106, 96, 0.4),
              0 0 0 6px rgba(0, 106, 96, 0.1);
}

/* Success Checkmark Animation */
.success-checkmark {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 2px solid var(--md-sys-color-primary);
  border-radius: 50%;
  position: relative;
  animation: successPop 0.4s var(--anim-easing-bounce);
}

.success-checkmark::after {
  content: '';
  position: absolute;
  left: 6px;
  top: 3px;
  width: 6px;
  height: 12px;
  border: solid var(--md-sys-color-primary);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0);
  animation: checkmarkDraw 0.3s var(--anim-easing-emphasized) 0.2s forwards;
}

@keyframes successPop {
  0% { transform: scale(0); }
  80% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

@keyframes checkmarkDraw {
  to { transform: rotate(45deg) scale(1); }
}

/* Error Shake Animation */
.error-shake {
  animation: errorShake 0.5s var(--anim-easing-standard);
}

@keyframes errorShake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-8px); }
  40%, 80% { transform: translateX(8px); }
}

/* ═══════════════════════════════════════════════════════════════════════════
   SCROLL ANIMATIONS
   ═══════════════════════════════════════════════════════════════════════════ */

/* Fade In Up - Scroll Triggered */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--anim-duration-slower) var(--anim-easing-emphasized),
              transform var(--anim-duration-slower) var(--anim-easing-emphasized);
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Slide In Left */
.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity var(--anim-duration-slower) var(--anim-easing-emphasized),
              transform var(--anim-duration-slower) var(--anim-easing-emphasized);
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Slide In Right */
.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity var(--anim-duration-slower) var(--anim-easing-emphasized),
              transform var(--anim-duration-slower) var(--anim-easing-emphasized);
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale In */
.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity var(--anim-duration-slower) var(--anim-easing-emphasized),
              transform var(--anim-duration-slower) var(--anim-easing-emphasized);
}

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

/* ═══════════════════════════════════════════════════════════════════════════
   LINK HOVER EFFECTS
   ═══════════════════════════════════════════════════════════════════════════ */

/* Link - Arrow Slide */
.link-arrow {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--anim-duration-fast) var(--anim-easing-standard);
}

.link-arrow::after {
  content: '→';
  transition: transform var(--anim-duration-fast) var(--anim-easing-standard);
}

.link-arrow:hover {
  gap: 8px;
}

.link-arrow:hover::after {
  transform: translateX(4px);
}

/* Link - Color Shift */
.link-color-shift {
  position: relative;
  background: linear-gradient(to bottom, currentColor 50%, var(--md-sys-color-primary) 50%);
  background-size: 100% 200%;
  background-position: 0 100%;
  transition: background-position var(--anim-duration-normal) var(--anim-easing-emphasized);
}

.link-color-shift:hover {
  background-position: 0 0;
}

/* ═══════════════════════════════════════════════════════════════════════════
   FORM INPUT ENHANCEMENTS
   ═══════════════════════════════════════════════════════════════════════════ */

/* Input - Floating Label */
.input-floating {
  position: relative;
}

.input-floating input {
  padding: 16px 12px 4px;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: 4px;
  transition: border-color var(--anim-duration-fast) var(--anim-easing-standard),
              box-shadow var(--anim-duration-fast) var(--anim-easing-standard);
}

.input-floating label {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--md-sys-color-on-surface-variant);
  transition: all var(--anim-duration-fast) var(--anim-easing-standard);
  pointer-events: none;
  background: var(--md-sys-color-surface);
  padding: 0 4px;
}

.input-floating input:focus,
.input-floating input:not(:placeholder-shown) {
  border-color: var(--md-sys-color-primary);
  box-shadow: 0 0 0 2px var(--glow-primary);
}

.input-floating input:focus ~ label,
.input-floating input:not(:placeholder-shown) ~ label {
  top: 0;
  font-size: 12px;
  color: var(--md-sys-color-primary);
}

/* ═══════════════════════════════════════════════════════════════════════════
   UTILITY CLASSES
   ═══════════════════════════════════════════════════════════════════════════ */

/* Transition Helpers */
.transition-fast { transition: all var(--anim-duration-fast) var(--anim-easing-standard); }
.transition-normal { transition: all var(--anim-duration-normal) var(--anim-easing-standard); }
.transition-slow { transition: all var(--anim-duration-slower) var(--anim-easing-standard); }

/* Animation Helpers */
.animate-fade-in { animation: pageFadeIn var(--anim-duration-normal) var(--anim-easing-standard); }
.animate-slide-up { animation: slideUpFade var(--anim-duration-slower) var(--anim-easing-emphasized); }
.animate-scale-in { animation: scaleIn var(--anim-duration-normal) var(--anim-easing-emphasized); }

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

/* ═══════════════════════════════════════════════════════════════════════════
   KEYFRAMES REFERENCE
   ═══════════════════════════════════════════════════════════════════════════ */

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

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

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