/**
 * Nexxore Animation System v3.0
 * Unified motion design with consistent timing
 */

/* ═══════════════════════════════════════════════════════════════════════════
   TIMING TOKENS — Use CSS variables for consistency
   ═══════════════════════════════════════════════════════════════════════════ */
:root {
  /* Duration */
  --duration-instant: 100ms;
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 350ms;
  --duration-slower: 500ms;
  
  /* Easing */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-spring: cubic-bezier(0.43, 0.195, 0.02, 1);
}

/* ═══════════════════════════════════════════════════════════════════════════
   KEYFRAMES — Core animations
   ═══════════════════════════════════════════════════════════════════════════ */

/* Fade in with subtle rise */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Simple fade */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Fade out */
@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

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

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

/* Slide from left */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Slide from right */
@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Slide from bottom (for modals) */
@keyframes slideInBottom {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Subtle pulse (for live indicators) */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

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

/* Progress bar */
@keyframes progress {
  0% { width: 0%; }
  100% { width: 100%; }
}

/* Bounce subtle */
@keyframes bounceSubtle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* Shake for errors */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
  20%, 40%, 60%, 80% { transform: translateX(4px); }
}

/* ═══════════════════════════════════════════════════════════════════════════
   ANIMATION CLASSES
   ═══════════════════════════════════════════════════════════════════════════ */

.animate-fadeIn {
  animation: fadeIn var(--duration-base) var(--ease-out) forwards;
}

.animate-fadeInUp {
  animation: fadeInUp var(--duration-base) var(--ease-out) forwards;
}

.animate-scaleIn {
  animation: scaleIn var(--duration-fast) var(--ease-out) forwards;
}

.animate-slideInLeft {
  animation: slideInLeft var(--duration-base) var(--ease-out) forwards;
}

.animate-slideInRight {
  animation: slideInRight var(--duration-base) var(--ease-out) forwards;
}

.animate-slideInBottom {
  animation: slideInBottom var(--duration-slow) var(--ease-out) forwards;
}

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

.animate-spin {
  animation: spin 0.8s linear infinite;
}

.animate-shake {
  animation: shake 0.4s ease-in-out;
}

.animate-bounce {
  animation: bounceSubtle 0.6s var(--ease-bounce);
}

/* ═══════════════════════════════════════════════════════════════════════════
   STAGGER DELAYS — For sequential reveals
   ═══════════════════════════════════════════════════════════════════════════ */

.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }
.stagger-6 { animation-delay: 300ms; }
.stagger-7 { animation-delay: 350ms; }
.stagger-8 { animation-delay: 400ms; }

/* ═══════════════════════════════════════════════════════════════════════════
   HOVER EFFECTS — Restrained, professional
   ═══════════════════════════════════════════════════════════════════════════ */

.hover-lift {
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.hover-scale {
  transition: transform var(--duration-fast) var(--ease-out);
}

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

.hover-glow {
  transition: box-shadow var(--duration-fast) var(--ease-out);
}

.hover-glow:hover {
  box-shadow: 0 0 24px var(--accent-primary-dim);
}

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

/* Spinner */
.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-default);
  border-top-color: var(--accent-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

.loading-spinner-sm {
  width: 14px;
  height: 14px;
  border-width: 1.5px;
}

.loading-spinner-lg {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

/* Skeleton loading */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-card) 25%,
    var(--bg-overlay) 50%,
    var(--bg-card) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

.skeleton-text {
  height: 14px;
  width: 100%;
  margin-bottom: var(--space-2);
}

.skeleton-text:last-child {
  width: 60%;
}

.skeleton-title {
  height: 24px;
  width: 50%;
  margin-bottom: var(--space-3);
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

.skeleton-card {
  height: 120px;
  border-radius: var(--radius-lg);
}

.skeleton-stat {
  height: 48px;
  border-radius: var(--radius-md);
}

/* Dots loading */
.loading-dots {
  display: inline-flex;
  gap: 4px;
}

.loading-dots span {
  width: 6px;
  height: 6px;
  background: var(--text-muted);
  border-radius: var(--radius-full);
  animation: pulse 1.4s ease-in-out infinite;
}

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

/* Progress bar */
.progress-bar {
  height: 4px;
  background: var(--bg-card);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  transition: width var(--duration-slow) var(--ease-out);
}

.progress-bar-indeterminate .progress-bar-fill {
  width: 30%;
  animation: progress 1.5s ease-in-out infinite;
}

/* ═══════════════════════════════════════════════════════════════════════════
   TRANSITION UTILITIES
   ═══════════════════════════════════════════════════════════════════════════ */

.transition-none { transition: none; }
.transition-all { transition: all var(--duration-base) var(--ease-out); }
.transition-fast { transition: all var(--duration-fast) var(--ease-out); }
.transition-slow { transition: all var(--duration-slow) var(--ease-out); }

.transition-colors {
  transition: color var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
}

.transition-opacity {
  transition: opacity var(--duration-base) var(--ease-out);
}

.transition-transform {
  transition: transform var(--duration-fast) var(--ease-out);
}

/* ═══════════════════════════════════════════════════════════════════════════
   SCROLL REVEAL — For intersection observer
   ═══════════════════════════════════════════════════════════════════════════ */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

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

.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

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

/* ═══════════════════════════════════════════════════════════════════════════
   FOCUS STATES — Accessibility
   ═══════════════════════════════════════════════════════════════════════════ */

.focus-ring:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.focus-within-ring:focus-within {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* ═══════════════════════════════════════════════════════════════════════════
   REDUCED MOTION — Respect user preferences
   ═══════════════════════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .reveal,
  .reveal-left,
  .reveal-scale {
    opacity: 1;
    transform: none;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   GLASS EFFECTS
   ═══════════════════════════════════════════════════════════════════════════ */

.glass {
  background: rgba(17, 17, 19, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
}

.glass-heavy {
  background: rgba(17, 17, 19, 0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}