Fix Padding Issue in Sudoku Grid Rows

[katarinakovacova]

Description

There is an issue with the padding in the Sudoku grid where, if a row is missing numbers, the entire row shrinks. This leads to inconsistent row heights and affects the overall layout.

Tasks

• Investigate the cause of the shrinking rows when numbers are missing.
• Ensure that each row maintains consistent height regardless of the number of digits.
• Adjust the CSS/SCSS to apply proper padding and spacing to prevent shrinking.
• Test the solution on all possible grid states (empty, partially filled, fully filled).

Acceptance Criteria

• Each row in the Sudoku grid maintains a consistent height, even when numbers are missing.
• The grid layout remains stable across different screen sizes.
• The CSS/SCSS code is clean and does not introduce any other layout issues.