* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, sans-serif; }
@keyframes vpulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
@keyframes vspin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes slideup {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}