Explain the concept of CSS Flexbox.
Instruction: Provide a detailed explanation of Flexbox and its main components.
Context: This question assesses the candidate's understanding of the CSS Flexbox layout model and its ability to create complex layouts with a more efficient and predictable way than the traditional float-based design.
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At its core, Flexbox provides a more efficient way to distribute space among items within a container, even when their sizes are unknown or dynamic...