matrix-bot/css/molecules/RoomTile.css

.mx_RoomTile {
    height: 20px;
    width: 250px;
    background-color: #ddd;
    margin-top: 1px;
    margin-bottom: 1px;
    padding: 5px;
}

.mx_RoomTile_name {
    font-size: 80%;
    font-weight: bold;
}

.mx_RoomTile div {
    overflow: hidden;
    text-overflow: ellipsis;
}