body {
  margin: 0;
  padding: 0;
  background: linear-gradient(135deg, #1e1e1e, #3a3a3a);
  color: #fff;
  font-family: 'Arial', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
}

.container {
  text-align: center;
  animation: pulse 2s infinite;
}

h1 {
  font-size: 2.5em;
  text-shadow: 0 0 10px #ff0000;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}