details {
    margin: 1em 0;
    padding: 0;
    border: none;
}

details > summary {
    box-sizing: border-box;
    padding: 0.6em 1em;
    border: 1px solid #9aa7b4;
    border-radius: 6px;
    cursor: pointer;
    color: #175a92;
    font-weight: bold;
}

details > summary:hover {
    text-decoration: underline;
}

details[open] > summary {
    margin-bottom: 0.8em;
}