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Bouton animé pulse

Html

<a class="button-animate" href="#">
<span></span>
<a class="button-animate-second" href="#">
<a class="button-animate-third" href="#">
</a>

Css

body {
    background-color: skyblue;
}

.button-animate {
    position: absolute;
    z-index: 10;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    box-sizing: content-box;
    display: block;
    width: 32px;
    height: 44px;
    /* background: #fa183d; */
    border-radius: 50%;
    padding: 18px 20px 18px 28px;
}

.button-animate:before {
    content: "";
    position: absolute;
    z-index: 0;
    left: 50%;
    top: 50%;
    transform: translateX(-50%) translateY(-50%);
    display: block;
    width: 80px;
    height: 80px;
    background: #fff;
    border-radius: 50%;
    -webkit-animation: pulse-border 2s infinite;
    animation: pulse-border 2s infinite;
}

.button-animate-second::before {
    content: "";
    position: absolute;
    z-index: 0;
    left: 50%;
    top: 50%;
    transform: translateX(-50%) translateY(-50%);
    display: block;
    width: 100px;
    height: 100px;
    background: #fff;
    border-radius: 50%;
    -webkit-animation: pulse-border 2.5s infinite;
    animation: pulse-border 2.5s infinite;
}

.button-animate-third::before {
    content: "";
    position: absolute;
    z-index: 0;
    left: 50%;
    top: 50%;
    transform: translateX(-50%) translateY(-50%);
    display: block;
    width: 120px;
    height: 120px;
    background: #fff;
    border-radius: 50%;
    -webkit-animation: pulse-border 3s infinite;
    animation: pulse-border 3s infinite;
}

.button-animate:after {
    content: "";
    position: absolute;
    z-index: 1;
    left: 50%;
    top: 50%;
    transform: translateX(-50%) translateY(-50%);
    display: block;
    width: 80px;
    height: 80px;
    background: #fff;
    border-radius: 50%;
    transition: all 200ms;
}

.button-animate:hover:after {
    background-color: #dbdbdb;
}

.button-animate span {
    display: block;
    position: relative;
    z-index: 3;
    width: 0;
    height: 0;
    border-left: 32px solid #000;
    border-top: 22px solid transparent;
    border-bottom: 22px solid transparent;
}

@-webkit-keyframes pulse-border {
    0% {
        transform: translateX(-50%) translateY(-50%) translateZ(0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateX(-50%) translateY(-50%) translateZ(0) scale(1.5);
        opacity: 0;
    }
}

@keyframes pulse-border {
    0% {
        transform: translateX(-50%) translateY(-50%) translateZ(0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateX(-50%) translateY(-50%) translateZ(0) scale(1.5);
        opacity: 0;
    }
}

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