サンプル

サンプルのhtmlソース

<div class="hover">
    <span>Hover Me</span>
    <a class="social-link" href="https://twitter.com/" target="_blank">
        <i class="fab fa-twitter"></i></a>
    <a class="social-link" href="https://codepen.io/" target="_blank">
        <i class="fab fa-codepen"></i></a>
    <a class="social-link" href="https://www.instagram.com/" target="_blank">
        <i class="fab fa-instagram"></i></a>
    <a class="social-link" href="https://github.com/" target="_blank">
        <i class="fab fa-github"></i></a>
</div>

サンプルのCSSソース

.hover {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 300px;
    height: 75px;
    background-color: #4DB6AC;
    border-radius: 99px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    overflow: hidden;
}
.hover:before, .hover:after {
    position: absolute;
    top: 0;
    display: flex;
    align-items: center;
    width: 50%;
    height: 100%;
    transition: 0.25s linear;
    z-index: 1;
}
.hover:before {
    content: '';
    left: 0;
    justify-content: flex-end;
    background-color: #4DB6AC;
}
.hover:after {
    content: '';
    right: 0;
    justify-content: flex-start;
    background-color: #44a69c;
}
.hover:hover {
    background-color: #46627f;
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.22);
}
.hover:hover span {
    opacity: 0;
    z-index: -3;
}
.hover:hover:before {
    opacity: 0.5;
    transform: translateY(-100%);
}
.hover:hover:after {
    opacity: 0.5;
    transform: translateY(100%);
}
.hover span {
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: whitesmoke;
    font-family: 'Fira Mono', monospace;
    font-size: 24px;
    font-weight: 700;
    opacity: 1;
    transition: opacity 0.25s;
    z-index: 2;
}
.hover .social-link {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 25%;
    height: 100%;
    color: whitesmoke;
    font-size: 24px;
    text-decoration: none;
    transition: 0.25s;
}
.hover .social-link i {
    text-shadow: 1px 1px rgba(70, 98, 127, 0.7);
    transform: scale(1);
}
.hover .social-link:hover {
    background-color: rgba(245, 245, 245, 0.1);
    color:#8fe;
}
.hover .social-link:hover i {
    animation: bounce 0.4s linear;
}

@keyframes bounce {
    40% {
      transform: scale(1.4);
    }
    60% {
      transform: scale(0.8);
    }
    80% {
      transform: scale(1.2);
    }
    100% {
      transform: scale(1);
    }
}