8c750b880aa8388cfaae7e466a4b230206e9ffc7
Percentage-based background-position translates to unequal pixel offsets (268px X vs 768px Y on a 1280x768 viewport), making the movement appear mostly vertical. Equal pixel values (1012px, 1012px) give a true 45-degree diagonal. X loops seamlessly at the tile width boundary. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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