body {
  font-family: Arial, sans-serif;
  text-align: center;
  background-color: #f0f8ff;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: auto;
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

h1 {
  color: #333;
}

.number-container {
  margin-top: 20px;
}

.balls {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.ball {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0073e6;
  color: white;
  font-size: 20px;
  font-weight: bold;
  border-radius: 50%;
  animation: bounce 0.6s ease-out;
  visibility: hidden;
}

@keyframes bounce {
  0% { transform: scale(0); }
  60% { transform: scale(1.2); }
  100% { transform: scale(1); }
}