.some-class {
    width: min-content;
    margin: auto
}
#progressBar {
    width: 100%;
    height: .5em;
    border-radius: 10px;
    display: grid;
    background-color: #ddd;
/*    grid-template-columns: 50% 50%;*/
}
#progressBar :first-child {
    background: green;
    border-radius: 10px;
}