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

body {
    margin: 0;
    overflow: hidden;

    background-image: url("bg.jpg");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

#canvas {
    display: block;
    background: transparent;
}