.version-filters {
    margin-bottom: 20px;
    padding: 15px;
    border-radius: 5px;
    border: 1px solid #dee2e6;
}

.version-filters select {
    padding: 8px;
    margin-right: 10px;
    border-radius: 4px;
    border: 1px solid #ced4da;
}

.version-filters button {
    padding: 8px 15px;
    background-color: #166de0;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.version-filters button:hover {
    background-color: #145cc5;
}

.docutils tr.filtered {
    display: none;
}

.version-filter-error {
    color: #e74c3c;
    margin-top: 10px;
    padding: 8px;
    background-color: #fadbd8;
    border-radius: 4px;
    border-left: 4px solid #e74c3c;
}