.button-wrapper {
    text-align: center;
    box-sizing: border-box;
}

.button {
    border: 1px solid #000000;
    border-radius: 0;
    /*font-size: 22px;*/
    padding: 15px 55px;
    display: inline-block;
    text-align: center;
}

.button-white {
    background-color: #ffffff;
    color: #000000 !important;   /* override the '.color-block a' rule */
}

.button-color {
    background-color: #666666;
    color: #ffffff !important;   /* override the '.color-block a' rule */
}