.flashing-thunder {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 99999; /* High value to stay on top */
    pointer-events: none; /* Prevent interference with clicks */
    object-fit: cover;
    animation: thunder-flash 0.2s infinite alternate;
}

@keyframes thunder-flash {
    0% { opacity: 0.1; }
    100% { opacity: 1; }
}