.button-whatsapp {
    position: fixed;
    z-index: 2000;
    bottom: 10px;
    left: -105px;
    width: 160px;
    padding: 8px 0;
    background-color: #25d366;
    cursor: pointer;
    overflow: hidden;
    -webkit-transition: all 500ms ease;
    -moz-transition: all 500ms ease;
    -o-transition: all 500ms ease;
    transition: all 500ms ease;
    text-decoration: none;
    color: #fff;
    font-size: 1.2em;
    text-align: right;
    -webkit-border-top-right-radius: 30px;
    -webkit-border-bottom-right-radius: 30px;
    -moz-border-radius-topright: 30px;
    -moz-border-radius-bottomright: 30px;
    border-top-right-radius: 30px;
    border-bottom-right-radius: 30px;
}

.button-whatsapp i {
    vertical-align: middle;
    padding: 0 12px;
}

.fa-2x {
    font-size: 2em;
}

.fa {
    display: inline-block;
    font: normal normal normal 14px/1 FontAwesome;
    font-size: inherit;
    text-rendering: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}