.clientbutton {
    background: #333;
    width: 100%;
    max-width: 350px;
    height: auto;
    margin: 5px 0 20px 0;
    padding: 10px 10px;
    font-family: 'Cabin', sans-serif;
    text-transform: uppercase;
    text-align: center;
    color: #fff;
    line-height: 1;
    -webkit-transition: all 0.2s ease-out;
    -moz-transition: all 0.2s ease-out;
    transition: all 0.2s ease-out;
}

.clientbutton:hover {
color: #fff;
background: #1f1f1f;
}