.post-message {
    border: 1px solid #bbd4e1;
    border-radius: 5px;
    padding: 10px;
    background-color: #d0ecfa;
}

.hentry-55 {
    margin: 0px 0px 55px 0px;
}

.grouped {
    background-color: #f0f0f0;
}

details>summary {
    list-style-type: '▶️';
}

details[open]>summary {
    list-style-type: '🔽';
}