CSS-EFFECTS/button.css at master · Atulsingh7/CSS-EFFECTS · GitHub

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body{
    margin: 0;
    padding: 0;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    height: 100vh;
    background: linear-gradient(black,#130f40);
}
a{
    position: absolute;
    margin:0;
    padding: 0;
    font-size: 40px;
    color: azure;
    top:50%;
    left: 50%;
    transform: translate(-50%,-50%);
    padding:0px 90px;
    border-radius: 100px;
    text-decoration: none;
    background: linear-gradient(90deg,#03a9f4,#f441a5,#ffeb3b,#03a9f4);
}
a:hover{
    animation-name: animate;
    animation-timing-function: linear;
    animation-direction: alternate;
    animation-duration: .1s;
    animation-duration: 18s;
    animation-iteration-count: infinite;
}

@keyframes animate{
   0%{
       background-position: 0%;
   }

100%{
    background-position: 900101%;
   }
}
a:hover:before{
    content: "";
    position: absolute;
    top: -5px;
    left: -5px;
    bottom: -5px;
    right: -5px;
    z-index: -1;
    background: linear-gradient(90deg,#03a9f4,#f441a5,#ffeb3b,#03a9f4);
    border-radius: 60px;
    filter: blur(70px);
}