body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    /* CRITICAL FIX: Set overflow-y to hidden to absolutely prevent the vertical scrollbar */
    overflow-y: hidden; 
    overflow-x: hidden; 
    background-color: black;

    /* CRITICAL FIX: Add a global color fallback. This ensures text is visible. */
    color: white; 
}

.slideshow-container {
    position: relative;
    /* Remove overflow: hidden here; it's handled by body/html */
    width: 100vw;
    
    /* Modern, robust height setting */
    min-height: 100vh; 
    height: 100dvh; 
}