html {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden; /* Prevent scrollbars on html/body */
}

body {
    width: 100%; /* Use full viewport width */
    height: 100%; /* Use full viewport height */
    margin: 0; /* Ensure no default margin */
    padding: 0; /* Ensure no default padding */
    background-color: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden; /* Consistent overflow handling */
    color: #fff; /* Default text color, can be adjusted */
    font-family: "Courier New", Courier, monospace; /* Retro/sci-fi font */
}

canvas {
    display: block; /* Good practice for responsive canvas */
    width: 100%;
    height: 100%;
    background-color: #050515; /* Dark blue/purpleish background for canvas */
    box-shadow: 0 0 1vmin #0ff, 0 0 2vmin #0ff, 0 0 3vmin #0ff; /* Responsive shadow */
}