When the characters engage in combat, they are taken to a separate combat screen. Battles are purely turn-based. Certain ability scores of the combatants determine which party acts first, and then actions alternate between the player characters and the enemies.
During battles, when characters fight, they are moved to a dedicated combat screen.  The battles are entirely turn-based. The order of action is determined by the abilities of the combatants, with the player's party taking turns against the enemy.