Visual Flexbox layout builder
`justify-content` controls alignment along the main axis (horizontal by default), while `align-items` controls alignment along the cross axis (vertical by default) - the live preview makes this distinction visual and easy to understand.
Yes - setting flex-direction to row with justify-content "space-between" is a common navbar pattern you can preview directly in the tool.
It's designed to do both - dragging the live preview while watching the generated CSS update helps build intuition for how each property behaves.
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