Glowing Gradient Button Animation Effects using CSS

Glowing Gradient Button Animation Effects

Now, again copy these CSS codes given below and paste these codes to new file and save as    ‘ style.css ‘
Note: save both files in the same directory(folder). 
and simply open index file and you can see the output result.  body{ margin: 0; padding: 0; background: #000; } a{ position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); width: 200px; height: 60px; text-align: center; line-height: 60px; color: #fff; font-size: 24px; text-decoration: none; text-transform: uppercase; font-family: sans-serif; box-sizing: border-box; background: linear-gradient(90deg, #03a9f4, #f441a5, #ffeb3b, #03a9f4); background-size: 400%; border-radius: 30px; z-index: 1; } a:hover { animation: animate 8s linear infinite; } @keyframes animate { 0% { background-position: 0%; } 100% { background-position: 400%; } } a:before{ content: ”; position: absolute; top: -5px; left: -5px; right: -5px; bottom: -5px; z-index: -1; background: linear-gradient(90deg, #03a9f4, #f441a5, #ffeb3b, #03a9f4); background-size: 400%; border-radius: 40px; filter: blur(20px); opacity: 0; transition: 0.5s; } a:hover:before{ filter: blur(20px); opacity: 1; animation: animate 8s linear infinite; }