.pace{position:fixed;width:100%;height:6px;z-index:9999;top:0;left:0}
.pace:before{content:'';display:block;width:100%;height:6px;background-color:rgba(255,255,255,.4);position:absolute}
.pace-inactive{display:none}
.pace-progress{height:6px;z-index:2;position:relative;transition:all .1s}
.pace-activity{display:none}