html, body {
    
    margin: 0;
    padding: 0;
    background: #000;
    
}

main {
    
    text-align: center;
    width: 100%;
    
}

canvas { display: block; }


main {
    
    align-items: center;
    display: flex;
    height: 100vh;
    justify-content: center;
    
}

main canvas { 
    
    height: auto !important;
    width: auto !important;
    max-width: 100%;
    max-height: 100%;
    display: inline-block;
    margin: 0 auto;
    vertical-align: middle;
    
}