.toggle-button {
    -fx-background-color: #444;
    -fx-text-fill: white;
    -fx-padding: 5 10;
    -fx-border-radius: 5;
    -fx-background-radius: 5;
}

.toggle-button:selected {
    -fx-background-color: #666;
}

.grid-pane {
    -fx-background-color: #f0f0f0;
    -fx-padding: 10;
    -fx-hgap: 15;
    -fx-vgap: 15;
}

.list-view {
    -fx-background-color: #f9f9f9;
}