body {
  font-family: Arial, sans-serif;
  text-align: center;
  margin-top: 100px;
}
.label {
  color: red;
  font-size: 32px;
  font-weight: bold;
}
button {
  font-size: 22px;
  padding: 12px 30px;
  border: none;
  border-radius: 8px;
  color: white;
  cursor: pointer;
  background-color: green;
  animation: blink 1s infinite;
}
@keyframes blink {
  0%, 100% { background-color: green; }
  50% { background-color: lime; }
}