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The sidereal offset. True Citra anchors Spica at 0° Libra. Lahiri is the official Indian standard.

North = diamond layout (movable houses). South = fixed-sign square.

True nodes stutter and reverse. Mean nodes glide. Differs by ~1° — sometimes across a nakshatra.

7K omits Pitṛkāraka (father). 8K adds Rahu and inserts PiK between MK and PK.

Auto follows your OS setting. Defaults to light when no preference is set.