JSFiddle - React, Tailwind, and code Playground

HTML

<div class="circle-text"><div>+987</div></div>

CSS

.circle-text {
    width:4%;
    background: #d95353;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.3);
    -moz-border-radius: 50%; 
    -webkit-border-radius: 50%; 
    font-family:verdana;
    font-size:12px;
}
.circle-text:after {
    content: "";
    display: block;
    width: 100%;
    height:0;
    padding-bottom: 100%;
    -moz-border-radius: 50%; 
    -webkit-border-radius: 50%; 
    border-radius: 50%;
    background-color: transparent;
      -webkit-animation: cd-pulse 2s infinite;
    -moz-animation: cd-pulse 2s infinite;
    animation: cd-pulse 2s infinite;

}
.circle-text div {
    float:left;
    width:100%;
    padding-top:50%;
    line-height:1em;
    margin-top:-0.5em;
    text-align:center;
    color:white;
}
@-webkit-keyframes cd-pulse {
    0% {
        -webkit-transform: scale(1);
        box-shadow: inset 0 0 5px 5px rgba(217, 83, 83, 0.8);
    }
    50% {
        box-shadow: inset 0 0 1px 1px rgba(217, 83, 83, 0.8);
    }
    100% {
        -webkit-transform: scale(1.6);
        box-shadow: inset 0 0 1px 1px rgba(217, 83, 83, 0);
    }
}
@-moz-keyframes cd-pulse {
    0% {
        -moz-transform: scale(1);
        box-shadow: inset 0 0 1px 1px rgba(217, 83, 83, 0.8);
    }
    50% {
        box-shadow: inset 0 0 1px 1px rgba(217, 83, 83, 0.8);
    }
    100% {
        -moz-transform: scale(1.6);
        box-shadow: inset 0 0 1px 1px rgba(217, 83, 83, 0);
    }
}
@keyframes cd-pulse {
    0% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -ms-transform: scale(1);
        -o-transform: scale(1);
        transform: scale(1);
        box-shadow: inset 0 0 1px 1px rgba(217, 83, 83, 0.8);
    }
    50% {
        box-shadow: inset 0 0 1px 1px rgba(217, 83, 83, 0.8);
    }
    100% {
        -webkit-transform: scale(1.6);
        -moz-transform: scale(1.6);
        -ms-transform: scale(1.6);
        -o-transform: scale(1.6);
        transform: scale(1.6);
        box-shadow: inset...