HTMLify

body {
    background-color: #151515;
    display: grid;
    place-items: center;
    height: 100vh;
}

.wrapper a {
    color: #fff;
}

.hover-fx {
    font-size: 2rem;
    display: inline-block;
    cursor: pointer;
    margin: 15px;
    width: 80px;
    height: 80px;
    line-height: 84px;
    border-radius: 50%;
    text-align: center;
    position: relative;
    color: #fff;
    background-color: rgba(255, 255, 255, 0.1);
    transition: 300ms;
}

.hover-fx:after {
    pointer-events: none;
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    content: '';
    box-sizing: content-box;
    box-shadow: 0 0 0 3px #fff;
    top: 0;
    left: 0;
    opacity: 0;
    transition: 300ms;
}

.hover-fx:hover {
    background-color: #fff;
    color: #151515;
}

.hover-fx:hover:after {
    opacity: 1;
    transform: scale(1.15);
}