/* ==========================================================================
   Keyframes
   ========================================================================== */

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.96);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}

@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(var(--color-accent-rgb), 0.35); }
  100% { box-shadow: 0 0 0 12px rgba(var(--color-accent-rgb), 0); }
}

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

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

/* ==========================================================================
   View transitions (router-driven)
   ========================================================================== */

.view-enter {
  animation: rise-in var(--dur-slow) var(--ease-decel) both;
}

.view-leave {
  animation: fade-in var(--dur-fast) var(--ease-standard) reverse both;
}

/* Staggered children entrance within a freshly mounted view */
.stagger-item {
  animation: rise-in var(--dur-slow) var(--ease-decel) both;
}

.stagger-item:nth-child(1) { animation-delay: 0ms; }
.stagger-item:nth-child(2) { animation-delay: 40ms; }
.stagger-item:nth-child(3) { animation-delay: 80ms; }
.stagger-item:nth-child(4) { animation-delay: 120ms; }
.stagger-item:nth-child(5) { animation-delay: 160ms; }
.stagger-item:nth-child(6) { animation-delay: 200ms; }

/* ==========================================================================
   Utility animation classes
   ========================================================================== */

.anim-fade-in {
  animation: fade-in var(--dur-base) var(--ease-standard) both;
}

.anim-scale-in {
  animation: scale-in var(--dur-base) var(--ease-spring) both;
}

.anim-shake {
  animation: shake var(--dur-slower) var(--ease-standard) both;
}

.anim-pulse-ring {
  animation: pulse-ring 1.4s var(--ease-standard) infinite;
}

.spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--color-border-strong);
  border-top-color: var(--color-accent);
  animation: spin 0.7s linear infinite;
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-hover) 25%,
    var(--color-surface-raised) 50%,
    var(--color-surface-hover) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.4s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

/* Hover lift used on clickable rows/cards beyond .card--interactive */
.hover-lift {
  transition: transform var(--dur-base) var(--ease-spring), box-shadow var(--dur-base) var(--ease-standard);
}

.hover-lift:hover {
  transform: translateY(-2px);
}

/* Press feedback for any clickable element */
.press-scale {
  transition: transform var(--dur-instant) var(--ease-spring-snappy);
}

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