body {
  font-family: 'Arial', sans-serif;
  margin: 0;
  padding: 0;
  background: #1a1a2e;
  color: #ffffff;
}

#game {
  max-width: 480px;
  margin: auto;
  padding: 10px;
}

header {
  background: #0f3460;
  padding: 10px;
  text-align: center;
  border-radius: 8px;
}

button {
  margin: 5px;
  padding: 10px;
  font-size: 16px;
  background-color: #e94560;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background-color: #f67280;
}

.hidden {
  display: none;
}

.screen {
  margin-top: 15px;
}

#gacha-result img {
  width: 64px;
  height: 64px;
  margin: 5px;
}