/* ═══════════════════════════════════════════════════════════════
   CalcHub — Animations & Transitions
   ═══════════════════════════════════════════════════════════════ */

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

/* Slide In */
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

/* Bounce */
@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

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

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

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--md-outline-variant);
  border-top-color: var(--md-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Skeleton Loader */
.skeleton {
  animation: pulse 1.5s ease-in-out infinite;
  background-color: var(--md-surface-container);
  border-radius: var(--md-radius-md);
}

/* Smooth transitions */
.transition-all {
  transition: all var(--md-duration) var(--md-easing);
}

.transition-colors {
  transition: background-color var(--md-duration) var(--md-easing),
              color var(--md-duration) var(--md-easing);
}

.transition-transform {
  transition: transform var(--md-duration-fast) var(--md-easing);
}