Query loop blog template aligning/leaning right

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I assume you want content centered instead of right justified.
You have this CSS rule somewhere:

ol, ul {
    margin: 0 0 1.5em 3em;
}

I cannot say where because you have optimized CSS, but what you want is:

ol, ul {
    margin: 0 auto;
}

If you add the corrected CSS to the Additional CSS section of the customizer or style book it ought to override the problematic CSS.

Worked! You’re brilliant, thank you.