@keyframes slideOutIn{0%{transform:scaleX(1);transform-origin:right}50%{transform:scaleX(0);transform-origin:right}51%{transform:scaleX(0);transform-origin:left}to{transform:scaleX(1);transform-origin:left}}.button-slide:hover .border-element{animation:slideOutIn .6s ease-in-out forwards}