1. Build Your Pool: Use the controls below. Select the number and type of dice (e.g., 2 d10s), then click "Add to Pool". If you add dice of a type already in the pool, the count will be updated. Repeat for all dice needed. You can remove individual dice groups from the pool using the '×' button next to them, or clear the entire pool.

2. Name Your Roll (Optional): Give your roll a descriptive name in the "Roll Name" field (e.g., "Attack", "Perception Check"). If left blank, a default name will be used.

3. Roll the Pool: Click the "Roll Current Pool" button.

4. View Results: The results appear in the "Results" section, with the newest roll at the top and highlighted. Older rolls are slightly dimmed. Each result block shows the roll name, timestamp, and the dice pool used.

5. Interact with Dice:

• Rearrange: Drag and drop individual dice *within* their result block to reorder them.
• Mark as Used: Click on an individual die to toggle its "used" state (marked visually). Used dice cannot be dragged. Click again to unmark it.

6. Manage Results:

• Rearrange Rolls: Drag and drop entire result blocks to change their order in the results list.
• Remove Rolls: Click the 'X' button in the top-right corner of a result block to remove it permanently.

Features: Responsive design (dual-column on desktop), Light/Dark mode support (follows system preference), draggable results and dice, clear visual distinction for used dice and dice types (colors consistent between pool and results), sticky builder column on desktop.