* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html, body {
  width: 100%;
  height: 100%;
  background-color: black;
  overflow: hidden;
}
#unity-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
#unity-canvas {
  width: 100%;
  height: 100%;
}
#unity-loading-bar {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}
#unity-progress-bar-empty {
  width: 300px;
  height: 20px;
  background: #222;
  border: 2px solid #000;
}
#unity-progress-bar-full {
  height: 100%;
  background: #4CAF50;
  width: 0%;
  transition: width 0.2s;
}