How to add borders to HBox using CSS - JAVAFX

 JavaFX Checkbox Styling using CSS

/* Checkbox */
.check-box {
    -fx-text-fill: #65686e;
    -fx-font-weight: normal;
    -fx-font-size: 14px;
    -fx-cursor: hand;
    -fx-opacity: 0.95;
}

.check-box:hover {
    -fx-text-fill: #505257;
    -fx-cursor: hand;
    -fx-opacity: 1.0;
}

.check-box .box {
    -fx-background-color: transparent;
    -fx-border-color: #65686e;
    -fx-border-radius: 4;
}

.check-box:selected .mark {
    -fx-background-color: white;
}

.check-box:selected .box {
    -fx-background-color: #1D5EFE;
}