.sc-stage {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1; /* Background by default */
    pointer-events: none;
    overflow: hidden;
}

#sc-canvas, #sc-video {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    object-fit: cover; /* Simulates background-size: cover */
}

/* Ensure sections are relative so we can calculate positions if needed, 
   though for fixed stage it doesn't matter much for z-index */
.vc_row.sap-scroll-section {
    position: relative;
    z-index: 1; /* Above stage */
}