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

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(5px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-5px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.97); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.35; }
}

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

.anim-fade-in   { animation: fadeIn   0.14s ease both; }
.anim-fade-up   { animation: fadeUp   0.18s ease both; }
.anim-fade-down { animation: fadeDown 0.18s ease both; }
.anim-scale-in  { animation: scaleIn  0.14s ease both; }
.anim-pulse     { animation: pulse    1.6s  ease infinite; }
.anim-spin      { animation: spin     0.7s  linear infinite; }

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