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

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

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9) translateY(16px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes slideFromRight {
  from { transform: translateX(100%); }
  to   { transform: translateX(0); }
}

@keyframes slideToRight {
  from { transform: translateX(0); }
  to   { transform: translateX(100%); }
}

@keyframes slideFromTop {
  from { opacity: 0; transform: scale(0.96) translateY(-6px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes toastIn {
  0% {
    opacity: 0;
    transform: translateX(110%) scale(0.9);
  }
  70% {
    transform: translateX(-12px) scale(1.02);
  }
  100% {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

@keyframes toastOut {
  0% {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateX(110%) scale(0.9);
  }
}

@keyframes toastProgress {
  from { transform: scaleX(1); }
  to   { transform: scaleX(0); }
}

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

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

@keyframes growUnderline {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}


.modal-overlay {
  animation: fadeIn var(--dur-modal) var(--ease-out) both;
}

.modal-content {
  animation: scaleIn var(--dur-modal) var(--ease-spring) both;
}

.modal-overlay.closing { animation: fadeIn var(--dur-modal) var(--ease-in) reverse both; }
.modal-content.closing { animation: scaleIn 180ms var(--ease-in) reverse both; }


.side-panel {
  animation: slideFromRight var(--dur-panel) var(--ease-ui) both;
}

.side-panel.closing {
  animation: slideToRight 200ms var(--ease-in) both;
}


.dropdown-menu {
  animation: slideFromTop 180ms var(--ease-out) both;
  transform-origin: top center;
}


.toast {
  animation: toastIn var(--dur-toast) var(--ease-spring) both;
}

.toast.removing {
  animation: toastOut 200ms var(--ease-in) both;
}


.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 400ms var(--ease-out), transform 400ms var(--ease-out);
}

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


.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-surface) 25%,
    var(--bg-neutral) 50%,
    var(--bg-surface) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}


.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spinnerRotate 0.7s linear infinite;
  display: inline-block;
}

.spinner-teal {
  border-color: var(--teal-light);
  border-top-color: var(--teal-primary);
}


.page-content {
  animation: fadeIn 200ms var(--ease-out) both;
}


.stagger > * {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeInUp 350ms var(--ease-out) both;
}

.stagger > *:nth-child(1) { animation-delay: 0ms; }
.stagger > *:nth-child(2) { animation-delay: 50ms; }
.stagger > *:nth-child(3) { animation-delay: 100ms; }
.stagger > *:nth-child(4) { animation-delay: 150ms; }
.stagger > *:nth-child(5) { animation-delay: 200ms; }
.stagger > *:nth-child(6) { animation-delay: 250ms; }