• Vidhaan means a prescribed method or ritual; in Jain context it refers to the official rules or sequence for performing worship, prayers, or other religious duties (the proper “way” to do things). It covers the approved procedures, mantras, and order of puja or aathakathä in a temple or home setting.

• Bhaktamar Stotra (Bhaktamar Stotram) is a famous Jain Sanskrit hymn in praise of Lord Adinath (Rishabhanatha), composed by Acharya Mānatunga in the 7th century. Key points:

- It is a devotional stotra written in Sanskrit. - Digambaras traditionally recite 48 verses; Śvetāmbaras recite 44 verses (the difference is due to later interpolations that Śvetāmbaras do not include in their main recitation). - The stotra describes the luminous qualities and virtues of the Tirthankara and expresses deep bhakti (devotion); it is considered powerful for spiritual upliftment and protection. - The verses are composed in the meter known as vanasatilakā and are recited as a prayer or hymn to evoke the Jina’s grace.

You can read more here and a concise overview here