## ADDED Requirements

### Requirement: Chart container boundary enforcement
The chart SHALL be fully contained within its parent card container without overflow.

#### Scenario: Chart renders within card boundaries
- **WHEN** the statistics page displays a line chart in a card component
- **THEN** the chart canvas SHALL NOT extend beyond the card's padding boundaries
- **AND** the chart SHALL adapt to container resize events

#### Scenario: Chart adapts to mobile viewport
- **WHEN** the viewport width is less than 375px
- **THEN** the chart SHALL scale down proportionally
- **AND** no horizontal scrolling SHALL be required to view the full chart