Modal buttons with same style alert buttons


I made a custom modal with a select and a couple of date pickers. I added 2 buttons (cancel, save) and I want to style them like alert buttons.

I tried to use alert classes, but id did not work:

<div class="alert-button-group">
        <button ion-button class="alert-button" (click)="close()">Cancel</button>
        <button ion-button class="alert-button alert-button-default" (click)="save()">Save</button>

Here is how they are actually:

Here is how I would like them to look:

Need I to recreate all css of alert buttons or I can apply their styles using default classes?