#apb-canvas {
    position: fixed;          /* Fixed */
    bottom: 0;                /* Anchored to the bottom of the viewport */
    left: 0;
    width: 100%;
    z-index: -1;              /* Behind content. Try '1' if it gets hidden by theme background */
    pointer-events: none;     /* Critical: Allows clicks to pass through to footer links */
    opacity: 1;               /* Controlled via JS, but base is 1 */
    mix-blend-mode: multiply; /*  */ 
}