html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0c1511;
  color: #dce5d6;
  font-family: Arial, sans-serif;
}

body { display: flex; align-items: center; justify-content: center; }
.header, .footer { display: none; }

#GameDiv {
  position: relative;
  width: min(100vw, 133.333vh) !important;
  height: min(75vw, 100vh) !important;
  outline: none;
}

#Cocos3dGameContainer, #GameCanvas { width: 100%; height: 100%; outline: none; }
canvas { display: block; background: transparent; }
body, canvas, div { user-select: none; -webkit-user-select: none; -webkit-tap-highlight-color: transparent; }