html, body {
	width: 100%;
	height: 100%;
  	margin: 0px;
  	padding: 0px;
	display: flex;
	justify-content: center;
	align-items: center;
}

html {
	flex-direction: column;
}

body {
	flex-direction: row;
	overflow: hidden;
    touch-action: none;
	/* background: radial-gradient(#efefef, #000000); */
	background: rgb(0,0,0);
}

canvas {
	margin: auto;
	display: block;
}

#bg {
  position: absolute;
  height:100%;
  width: 100%;
  opacity: 0.8;
  transition: opacity 1s ease;
  background-color: rgb(0,0,0);
}

.loading-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 24px;
  font-family: Arial, sans-serif;
  text-align: center;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.8);
  padding: 20px 40px;
  border-radius: 10px;
  transition: opacity 0.5s ease;
}

.intro-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 20px;
  font-family: Arial, sans-serif;
  text-align: center;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.8);
  padding: 20px 40px;
  border-radius: 10px;
  transition: opacity 0.5s ease;
  cursor: pointer;
  pointer-events: auto;
}

.intro-message:hover {
  background: rgba(0, 0, 0, 0.9);
}

/* 手機模式優化 */
@media (max-width: 768px) {
  .loading-message {
    font-size: 20px;
    padding: 15px 30px;
  }
  
  .intro-message {
    font-size: 18px;
    padding: 15px 30px;
  }
}

/* 確保 loading 訊息在手機上可見 */
@media (max-width: 480px) {
  .loading-message {
    font-size: 18px;
    padding: 12px 25px;
    width: 80%;
    max-width: 300px;
  }
  
  .intro-message {
    font-size: 16px;
    padding: 12px 25px;
    width: 80%;
    max-width: 300px;
  }
}