.reading-progress-section--sticky{position:sticky;top:0;z-index:100}.reading-progress-section .sr-only{height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px;clip:rect(0,0,0,0);border:0;white-space:nowrap}.reading-progress-section.is-fixed{left:0;position:fixed;top:0;transition:top .3s linear;width:100%;z-index:999}.reading-progress-section__track{background-color:transparent;flex-shrink:0;height:4px;left:0;position:absolute;top:0;width:100%}.reading-progress-section__fill{height:4px;transition:width .1s linear;width:0;will-change:width}.reading-progress-section__btn-wrap{display:flex;justify-content:center;margin-top:4px}