body {
    background: #000;
    align-items: center;
    display: flex;
    height: 100vh; /* Fallback for browsers that do not support Custom Properties */
    justify-content: center;
}

body,html {
    margin: 0;
    overflow: hidden;
    padding: 0;
}

canvas { 
    /*border: blue 1px solid;*/
    max-width: 100%;
    max-height: 100%;
    display: inline-block; /* Instead of display: block; */
    margin: 0 auto;
    vertical-align: middle;
    touch-action: none;
}

div{
   display:none; 
}