body {
  box-sizing: border-box;
  margin: 0;
  font-family: 'Arial', sans-serif;
  background: #1e1e1e;
  color: #e0e0e0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.game-container {
  box-sizing: border-box;
  text-align: center;
  width: 90%;
  max-width: 450px;
  background: #110000;
  padding: 20px;
  border-radius: 12px;
}

h1 {
  font-size: 2em;
  margin-bottom: 10px;
  color: #ffffff;
}

h2, h3 {
  margin: 5px 0;
  color: #c0c0c0;
}

#game-area {
  width: 100%;
  aspect-ratio: 1;
  margin: 20px auto;
  position: relative;
  background: #333333;
  border-radius: 10px;
  overflow: hidden;
}

.dot {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  position: absolute;
  background: #b51111;
  cursor: pointer;
  transition: transform 0.1s;
}

.dot:hover {
  transform: scale(1.1);
}

button {
  padding: 10px 20px;
  background: #555555;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  color: #e0e0e0;
  margin-top: 15px;
}

button:hover {
  background: #777777;
}

@media (max-width: 480px) {
  body {
    height: auto;
    min-height: 100vh;
    padding: 8px;
  }

  .game-container {
    width: 100%;
    padding: 14px;
  }

  h1 { font-size: 1.6em; }
  #game-area { margin: 14px auto; }
  button { min-height: 44px; }
}