.feed-top{bottom:calc(24px + var(--mobile-tabs-h,0px));pointer-events:none;justify-content:flex-end;height:0;padding-right:20px;display:flex;position:sticky}.feed-top__btn{background:var(--bg);width:48px;height:48px;box-shadow:var(--shadow);opacity:0;visibility:hidden;flex-basis:48px;transition:opacity .2s,visibility .2s;transform:translateY(-100%)}.feed-top__btn.is-on{opacity:1;visibility:visible;pointer-events:auto}