pulse/animate.css at master · Defv40/pulse · GitHub

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@import url('https://fonts.googleapis.com/css2?family=Caveat&display=swap');
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}


body,html{
    height: 100%;
    width: 100%;
}
body{
    background: rgb(2,0,36);
background: linear-gradient(90deg, rgba(2,0,36,1) 0%, rgba(192,231,211,0.989233193277311) 0%, rgba(120,214,223,0.9640231092436975) 100%);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Caveat', cursive;
    background: linear-gradient();
}
.btn{
    display: inline-block;
    font-size: 30px;
    padding: 42px 39px;
    border-radius: 50%;
    background: rgb(0, 0, 0);
    text-decoration: none;
    color:rgb(255, 255, 255);
    transition: 0.4s;
    animation: pulse 2s linear infinite;
    letter-spacing: 2px;
}
.btn:hover{
    transform: scale(1.4);
}
@keyframes pulse {
    0%{
        box-shadow: 0 0 0 0px rgba(94, 159, 179, 0.6), 0 0 0 0 rgba(94, 159, 179, 0.6);
    }
    35%{
        box-shadow: 0 0 0 50px rgba(94,159,179,0), 0 0 0 0px rgba(94, 159, 179, 0.6);
    }
    65%{
        box-shadow: 0 0 0 50px rgba(94,159,179,0), 0 0 0 20px rgba(94,159,179,0);
    }
    100%{
        box-shadow: 0 0 0 0px rgba(94, 159, 179, 0), 0 0 0 20px rgba(94,159,179,0);
    }
}