.ui-countdown-button:after{animation:shine 10s linear infinite;background:linear-gradient(90deg,transparent,hsla(0,0%,100%,.15) 75%,hsla(0,0%,100%,.25) 80%,hsla(0,0%,100%,.15) 85%,transparent);background-size:max(var(--progress-bg-size),400%) 100%;transition:width 1s linear}.ui-countdown-button:before{transition:width 1s linear}@keyframes shine{0%{background-position:0 0}to{background-position:min(calc(var(--progress-bg-size)*-1),-400%) 0}}