.st-tr-history {
    margin: 2em 0 1em;
    padding: 0.8em 1em;
    border-top: 1px solid #e5e5e5;
    font-size: 0.88em;
    color: #555;
}
.st-tr-history > summary {
    cursor: pointer;
    color: #666;
    font-weight: 500;
    list-style: none;
    padding: 0.2em 0;
}
.st-tr-history > summary::-webkit-details-marker {
    display: none;
}
.st-tr-history > summary::before {
    content: "\25B8\0020";
    display: inline-block;
}
.st-tr-history[open] > summary::before {
    content: "\25BE\0020";
}
.st-tr-history-list {
    list-style: none;
    margin: 0.6em 0 0 0;
    padding: 0;
}
.st-tr-history-list > li {
    padding: 0.5em 0;
    border-bottom: 1px dotted #eee;
}
.st-tr-history-list > li:last-child {
    border-bottom: none;
}
.st-tr-history-list time {
    color: #888;
    font-variant-numeric: tabular-nums;
    margin-right: 0.6em;
}
.st-tr-history-change {
    display: inline-block;
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 0.85em;
    margin-right: 0.5em;
}
.st-tr-history-change-added {
    background: #e7f5e7;
    color: #1f6f1f;
}
.st-tr-history-change-rewritten {
    background: #fff5e0;
    color: #8a5a00;
}
.st-tr-history-summary {
    margin: 0.3em 0 0 0;
    color: #777;
    font-size: 0.95em;
}