ELI5 mode
The golden ratio is the irrational number (1 + √5)/2 ≈ 1.6180339887, symbolized by φ (phi), where a larger quantity divided by a smaller one equals the sum of both divided by the larger—creating perfect proportion. Revered since antiquity for its aesthetic balance, it appears ubiquitously in nature, art, and architecture, from nautilus shells to the Parthenon, fueling endless fascination in design and math. Modern creators invoke it for visually harmonious layouts in everything from logos to website grids.
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