Rambox-CE/ext/packages/ext-theme-base/sass/src/ProgressBar.scss

.#{$prefix}progress {
    position: relative;
    border-style: solid;
    overflow: hidden;
}

.#{$prefix}progress-bar {
    overflow: hidden;
    position: absolute;
    width: 0;
    height: 100%;
}

.#{$prefix}progress-text {
    overflow: hidden;
    position: absolute;
}