/* ============================================================================
   RDR ANIMATION SYSTEM
   ============================================================================
   All keyframes, transitions, and animation utilities.
   Only animates transform + opacity (GPU-composited) for performance.
   ============================================================================ */

/* ────────────────── KEYFRAMES ────────────────── */

/* Fade variants */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-16px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(16px); }
  to   { opacity: 1; transform: translateX(0); }
}

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

@keyframes fadeOutDown {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(8px); }
}

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

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

@keyframes popIn {
  0%   { opacity: 0; transform: scale(0.9); }
  70%  { transform: scale(1.02); }
  100% { opacity: 1; transform: scale(1); }
}

/* Slide variants */
@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutRight {
  from { transform: translateX(0); opacity: 1; }
  to   { transform: translateX(100%); opacity: 0; }
}

@keyframes slideInUp {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

@keyframes slideDown {
  from { opacity: 0; transform: scaleY(0); }
  to   { opacity: 1; transform: scaleY(1); }
}

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

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

/* Pulse glow */
@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.2); }
  50%      { box-shadow: 0 0 0 8px rgba(59, 130, 246, 0); }
}

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

/* Subtle float for empty states */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

/* Progress bar */
@keyframes progressIndeterminate {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(300%); }
}

/* Glow ring for active sidebar item */
@keyframes glowPulse {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 1; }
}

/* Content page transition */
@keyframes pageEnter {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pageExit {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-4px); }
}

/* Header shimmer (login page) */
@keyframes headerShimmer {
  0%   { transform: translateX(-30%); }
  100% { transform: translateX(30%); }
}

/* Count up pulse (for metric numbers) */
@keyframes numberPop {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.05); }
  100% { transform: scale(1); }
}


/* ────────────────── ANIMATION UTILITY CLASSES ────────────────── */

.anim-fade-in {
  animation: fadeIn var(--duration-normal) var(--ease-out) both;
}

.anim-fade-in-up {
  animation: fadeInUp var(--duration-slow) var(--ease-out) both;
}

.anim-fade-in-down {
  animation: fadeInDown var(--duration-normal) var(--ease-out) both;
}

.anim-fade-in-left {
  animation: fadeInLeft var(--duration-slow) var(--ease-out) both;
}

.anim-fade-in-right {
  animation: fadeInRight var(--duration-slow) var(--ease-out) both;
}

.anim-scale-in {
  animation: scaleIn var(--duration-normal) var(--ease-out) both;
}

.anim-pop-in {
  animation: popIn var(--duration-slow) var(--ease-spring) both;
}

.anim-page-enter {
  animation: pageEnter var(--duration-slow) var(--ease-out) both;
}


/* ────────────────── STAGGER DELAYS ────────────────── */

.stagger-1 { animation-delay: 0ms; }
.stagger-2 { animation-delay: 60ms; }
.stagger-3 { animation-delay: 120ms; }
.stagger-4 { animation-delay: 180ms; }
.stagger-5 { animation-delay: 240ms; }
.stagger-6 { animation-delay: 300ms; }
.stagger-7 { animation-delay: 360ms; }
.stagger-8 { animation-delay: 420ms; }


/* ────────────────── SKELETON LOADER ────────────────── */

.skeleton {
  background: linear-gradient(90deg,
    var(--gray-200) 25%,
    var(--gray-100) 50%,
    var(--gray-200) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
  color: transparent !important;
  user-select: none;
  pointer-events: none;
}

.skeleton * {
  visibility: hidden;
}

.skeleton-text {
  height: 14px;
  margin-bottom: 8px;
  border-radius: var(--radius-xs);
}

.skeleton-text.short { width: 40%; }
.skeleton-text.medium { width: 65%; }
.skeleton-text.long { width: 90%; }

.skeleton-circle {
  border-radius: var(--radius-full);
}

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

.skeleton-chart {
  height: 200px;
  border-radius: var(--radius-lg);
}


/* ────────────────── SPINNER ────────────────── */

.spinner {
  width: 24px;
  height: 24px;
  border: 2.5px solid var(--gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.spinner-lg {
  width: 36px;
  height: 36px;
  border-width: 3px;
}

.spinner-white {
  border-color: rgba(255,255,255,0.25);
  border-top-color: #fff;
}


/* ────────────────── LOADING STATE WRAPPER ────────────────── */

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-6);
  color: var(--color-text-muted);
  gap: var(--space-4);
}

.loading-state p {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
}


/* ────────────────── PROGRESS BAR ────────────────── */

.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--gray-100);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue-500), var(--blue-400));
  border-radius: var(--radius-full);
  transition: width var(--duration-slow) var(--ease-out);
}

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


/* ────────────────── HOVER TRANSITIONS ────────────────── */

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

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

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

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

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

.hover-glow:hover {
  box-shadow: var(--shadow-glow);
}

.press-scale:active {
  transform: scale(0.97);
}


/* ────────────────── INTERSECTION OBSERVER ANIMATIONS ────────────────── */
/* Elements with .anim-on-scroll start invisible, get .anim-visible when in view */

.anim-on-scroll {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.anim-on-scroll.anim-visible {
  opacity: 1;
  transform: translateY(0);
}


/* ────────────────── REDUCED MOTION ────────────────── */

@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;
  }

  .anim-on-scroll {
    opacity: 1;
    transform: none;
  }
}