#hrt-form {
    border: 1px solid #ccc;
    padding: 18px;
    max-width: 480px;
    background: #fafafa;
}

#hrt-output {
    margin-top: 20px;
    padding: 12px;
    background: #fff;
    border: 1px solid #ddd;
}

.hrt-block p {
    margin: 6px 0;
}

hr {
    margin: 18px 0;
}