element-web/css/molecules/RoomTile.css

.mx_RoomTile {
    height: 20px;
    background-color: #ddd;
    margin-top: 1px;
    margin-bottom: 1px;
    padding: 5px;
    cursor: pointer;
    border: 2px solid white;
    transition: background-color 0.1s ease;
}

.mx_RoomTile.selected {
    border: 2px inset #eee;
}

.mx_RoomTile:hover {
    background-color: #aad;
}

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

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