#scroll-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background-color: white;
    z-index: 9999;
    transition: width 0.1s ease-out;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.15); /* Soft black drop shadow */
}