#bse-instant-progress {
    position: fixed;
    z-index: 2147483647;
    top: 0;
    right: 0;
    left: 0;
    height: 3px;
    pointer-events: none;
    opacity: 0;
    overflow: hidden;
    transition: opacity .16s ease;
}

#bse-instant-progress.is-active {
    opacity: 1;
}

#bse-instant-progress > span {
    display: block;
    width: 0;
    height: 100%;
    background: currentColor;
    transform-origin: right center;
    transition: width .18s ease;
}

#bse-instant-progress.is-done {
    opacity: 0;
    transition-delay: .12s;
}

@media (prefers-reduced-motion: reduce) {
    #bse-instant-progress,
    #bse-instant-progress > span {
        transition: none;
    }
}