body {
  font-family: Arial, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
  transition: background-color 0.5s;
}

.container {
  text-align: center;
}

button {
  padding: 12px 24px;
  font-size: 1.2rem;
  cursor: pointer;
  margin-top: 20px;
}

.result {
  font-size: 2rem;
  margin-top: 20px;
}

.omen {
  font-size: 1rem;
  margin-top: 10px;
  font-style: italic;
}

.hidden {
  display: none;
}

.heads {
  background-color: #0099ff; /* blue */
  color: #fff;
}

.tails {
  background-color: #ff4d4d; /* red */
  color: #fff;
}