#operation{
    -fx-background-color: #f5f5f5;
}

.close,.close:pressed{
    -fx-background-radius: 2px;
    -fx-background-position: center center;
    -fx-background-repeat: no-repeat;
    -fx-background-size: 43px 34px;
    -fx-background-color: transparent;
    -fx-background-image: url("/fxml/chat/img/system/close_0.png");
    -fx-cursor: hand;
    -fx-border-width: 0;
}

.close:hover{
    -fx-background-color: #f45454;
    -fx-background-image: url("/fxml/chat/img/system/close_1.png");
}

.min,.min:pressed{
    -fx-background-radius: 2px;
    -fx-background-position: center center;
    -fx-background-repeat: no-repeat;
    -fx-background-size: 43px 34px;
    -fx-background-color: transparent;
    -fx-background-image: url("/fxml/chat/img/system/min_0.png");
    -fx-cursor: hand;
    -fx-border-width: 0;
}

.min:hover{
    -fx-background-color: derive(#c7c6c6, 10%);
    -fx-background-image: url("/fxml/chat/img/system/min_1.png");
}
