* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #111;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

canvas {
    display: block;
    width: 100vw;
    height: 100vh;
  
    max-width: 400px;
    max-height: 700px;
   
    margin: auto;
}

@media (max-width: 480px) {
    canvas {
        width: 100vw;
        height: 100svh;    
        max-width: 100vw;
        max-height: 100svh;
    }
}