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

html {	
	flex-direction: column;
}

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

canvas {
	margin: auto;
	display: block;
	height: auto;
	width: 2000px;
	height:2000px;
}

* {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}


 /* Estilos específicos para los botones */
 .btn-absolute {
	position: absolute;
	padding: 10px 20px;
	border: none;
	border-radius: 5px;
	cursor: pointer;
	transition: background-color 0.3s;
}
.btn-absolute:hover {
	background-color: #ddd;
	color: black;
}
.btn1 {
	top: 45%;
	left: 2%;
	background-color: black;
    color: white;
    border: 3px solid white;
	z-index: 5;
}
.btn2 {
	top: 50%;
	left: 2%;
	background-color: black;
    color: white;
    border: 3px solid white;
	z-index: 5;
}
.btn3 {
	top: 55%;
	left: 2%;
	background-color: black;
    color: white;
    border: 3px solid white;
	z-index: 5;
}
.btn4 {
	top: 60%;
	left: 2%;
	background-color: black;
    color: white;
    border: 3px solid white;
	z-index: 5;
}


canvas {
    width: 100% !important;
    height: 100% !important;
    bottom: 0;
    left: 0;
    margin: auto;
    overflow: auto;
    position: fixed;
    right: 0;
    top: 0;
    -o-object-fit: contain;
    object-fit: contain;
  }