styles.css

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #030115;
}

/* Background canvas - non-interactive, sits behind the stars */
#stardust-bg {
    width: 100%;
    height: 100%;
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none; /* don't block pointer events */
    z-index: 0;
}

/* Top canvas: interactive particles and input */
#stardust {
    width: 100%;
    height: 100%;
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;
}