.social-btns .btn,
.social-btns .btn .fa,
.social-btns .btn:before {
    transition: all .35s;
    transition-timing-function: cubic-bezier(0.31, -.105, .43, 1.59)
}

.social-btns .btn:before {
    top: 90%;
    left: -110%
}

.social-btns .btn .fa {
    -webkit-transform: scale(0.8);
    transform: scale(0.8)
}

.social-btns .btn.facebook:before {
    background-color: #3b5998
}

.social-btns .btn.facebook .fa {
    color: #3b5998
}

.social-btns .btn.instagram:before {
    background-color: #c13584
}

.social-btns .btn.instagram .fa {
    color: #c13584
}

.social-btns .btn:focus:before,
.social-btns .btn:hover:before {
    top: -10%;
    left: -10%
}

.social-btns .btn:focus .fa,
.social-btns .btn:hover .fa {
    color: #fff;
    -webkit-transform: scale(1);
    transform: scale(1)
}

.social-btns {
    height: 90px;
    margin: auto;
    font-size: 0;
    text-align: center;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0
}

.social-btns .btn {
    display: inline-block;
    background-color: #fff;
    width: 90px;
    height: 90px;
    line-height: 90px;
    margin: 0 10px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-radius: 28%;
    box-shadow: 0 5px 15px -5px rgba(0, 0, 0, .1);
    opacity: .99
}

.social-btns .btn:before {
    content: '';
    width: 120%;
    height: 120%;
    position: absolute;
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg)
}

.social-btns .btn .fa {
    font-size: 38px;
    vertical-align: middle
}