.cta{position:fixed;bottom:20px;right:20px;width:auto;font-size:16px;max-width:200px;height:50px;border-radius:5px;background:red;z-index:1;transition:all 1s;display:flex;text-align:center;align-items:center;justify-content:center}.hide{opacity:0;left:-100%}.show{opacity:1;left:20px}