#overlay {
    display: none; 
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.85);
    z-index: 1000;
    color: white;
    text-align: center;
    padding-top: 15%;
    font-family: sans-serif;
}
.progress-container {
    width: 60%;
    margin: 20px auto;
    background-color: #555;
    border-radius: 5px;
    padding: 3px;
}
.progress-bar {
    width: 0%;
    height: 30px;
    background-color: #4CAF50;
    border-radius: 3px;
    transition: width 0.2s;
    text-align: center;
    line-height: 30px;
    font-weight: bold;
}