This dashboard mockup outlines a NASCAR statistics interface with a header spanning the full width above six equal-sized placeholder panels arranged in a grid. Using CSS Grid’s `grid-template-rows` and `grid-template-columns` set to three equal fractions, the layout assigns the first child a `grid-column: span 3` to create the wide title bar. The remaining plot and legend divs fill the cells with flexible `1fr` spacing, though the code contains no interactive functionality or data bindings.