.button {
    color: #fff;
    background: #3c3c3c;
    border-color: #3c3c3c;
}
.bx-authform-input-container input[type="text"], .bx-authform-input-container input[type="password"] {
    display: block;
    width: 100%;
    font-size: 18px;
    height: 38px;
    margin: 0;
    padding: 0 4px;
    border: 1px solid #8e9499;
    border-radius: 2px;
    background: #f8fafc;
    outline: 0;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}