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

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

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

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

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

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

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

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

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

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

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

@keyframes wave {
  0% { transform: translateX(0) translateY(0); }
  25% { transform: translateX(-5%) translateY(-3%); }
  50% { transform: translateX(0) translateY(-5%); }
  75% { transform: translateX(5%) translateY(-3%); }
  100% { transform: translateX(0) translateY(0); }
}

.animate-fade-in { animation: fadeIn var(--transition-slow) ease-out; }
.animate-fade-in-up { animation: fadeInUp var(--transition-slow) ease-out; }
.animate-fade-in-down { animation: fadeInDown var(--transition-slow) ease-out; }
.animate-slide-in-right { animation: slideInRight var(--transition-slow) ease-out; }
.animate-slide-in-left { animation: slideInLeft var(--transition-slow) ease-out; }
.animate-scale-in { animation: scaleIn var(--transition-slow) ease-out; }

.page-enter { animation: fadeInUp 300ms ease-out; }

/* Page content entrance */
.page-content { animation: fadeInUp 350ms ease-out; }

/* Card entrance stagger */
.card { animation: fadeInUp 400ms ease-out both; }
.grid .card:nth-child(1) { animation-delay: 0ms; }
.grid .card:nth-child(2) { animation-delay: 60ms; }
.grid .card:nth-child(3) { animation-delay: 120ms; }
.grid .card:nth-child(4) { animation-delay: 180ms; }
.grid .card:nth-child(5) { animation-delay: 240ms; }
.grid .card:nth-child(6) { animation-delay: 300ms; }

/* Stat card number pop */
.stat-value { animation: scaleIn 500ms ease-out 200ms both; }

/* Sidebar item entrance */
.sidebar-item { animation: slideInLeft 300ms ease-out both; }
.sidebar-item:nth-child(1) { animation-delay: 50ms; }
.sidebar-item:nth-child(2) { animation-delay: 100ms; }
.sidebar-item:nth-child(3) { animation-delay: 150ms; }
.sidebar-item:nth-child(4) { animation-delay: 200ms; }
.sidebar-item:nth-child(5) { animation-delay: 250ms; }

/* Button press & hover */
.btn { transition: all var(--transition-fast), transform 100ms ease; }
.btn-primary:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(13,148,136,0.3); }
.btn-primary:active:not(:disabled) { transform: translateY(0) scale(0.97); box-shadow: none; }

/* Badge pop-in */
.badge { animation: scaleIn 250ms ease-out; }

/* Settings tab transition */
#settings-content { animation: fadeIn 250ms ease-out; }

/* Table row hover highlight */
.table tr { transition: background var(--transition-fast); }

/* Kanban card drag-ready pulse */
.kanban-card { transition: transform var(--transition-fast), box-shadow var(--transition-fast); }

/* Progress bar fill animation */
.progress-bar-fill { animation: progressGrow 800ms ease-out 300ms both; }

@keyframes progressGrow {
  from { width: 0; }
}

/* Auth card entrance */
.auth-card { animation: scaleIn 400ms ease-out; }

/* Topbar slide down */
.topbar { animation: fadeInDown 300ms ease-out; }

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms ease-out, transform 600ms ease-out;
}

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

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-grey-medium);
  border-top-color: var(--color-teal);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

.spinner-sm { width: 16px; height: 16px; border-width: 2px; }
.spinner-lg { width: 40px; height: 40px; border-width: 4px; }

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.hero-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  overflow: hidden;
  z-index: -1;
}

.hero-wave svg {
  position: absolute;
  bottom: 0;
  width: 200%;
  animation: wave 15s ease-in-out infinite;
}

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