*{
  margin: 0;
  padding: 0;
}
body{
  margin: 0;
  padding: 0;
  height: 100vh;
  overflow: hidden;
  font-family: 'Times New Roman', Times, serif;
  touch-action: manipulation;
}

canvas{
  width: 100%;
  height: 100%;
}

.l-header{
  position: absolute;
  top: 20px;
  left: 5%;
  font-size: 10px;
  color: #fff;
}
.l-header > h1{
  padding: 0 0 5px;
  font-size: 18px;
}

.img{
  position: absolute;
  bottom: 10px;
  right: 10px;
  width: 50px;
  box-sizing: border-box;
}
img{
  width: 100%;
  height: 100%;
}