progress {
    width: 50%;
    height: 10px;
    margin-left: 0%;
    box-shadow: 1px 1px 4px rgba(0, 0, 0, 0.2);
}

progress::-webkit-progress-bar {
    background-color: rgba(128, 128, 128, .1);
}

progress::-webkit-progress-value {
    background-color: orange;
}

progress::-moz-progress-bar {
    /* style rules */
}