#loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 5px;
    background-color: #3498db;
    z-index: 9999;
    transition: width 0.4s ease-out;
}

#blockOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2); /* Transparent black */
    z-index: 9998; /* Just below the loader */
    display: none; /* Initially hidden */
}