.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}

.progress-bar {
    width: 100%;
    background-color: #f3f3f3;
    border-radius: 5px;
    overflow: hidden;
    margin-top: 20px;
    margin-bottom: 20px;
}

#progressBarFill {
    height: 20px;
    width: 0;
    background-color: #4caf50;
    transition: width 0.3s;
}