.intro {
    font-size: 16px;
}
.wpla-header {
    display: block;
}
.wpla-donate {
    float: right;
    max-width: 200px;
    text-align: center;
}
.wpla-donate p {
    font-size: .8em;
}
hr {
    margin: 20px 0;
}
.wpla-description {
    float: left;
    max-width: calc( 100% - 300px);
}



@media screen and (max-width:500px) {
    .wpla-description,
    .wpla-donate {
        float: none;
        max-width: 100%;
        width: 100%;
        margin-bottom: 30px;
    }
}