What salient aspects of Indian culture and heritage should I focus on for UPSC?

For UPSC, focus on the evolution and continuity of Indian culture. Prioritise Architecture (Indus Valley to Dravidian/Nagara styles), Literature (Vedas to Bhakti poetry), and Philosophy (Buddhism, Jainism, and Six Schools).
Use NCERT Class 11 Fine Arts and Nitin Singhania as core resources.
Always link cultural shifts to their socio-political contexts, such as the impact of the Bhakti movement on regional languages.