Atmospheric stratification inferred from NLTE inversions of Fe I 8526 Å and Ca II 8542 Å for three scans: Scan 1 (07:36–07:48 UT, onset–pre-peak), Scan 3 (08:14–08:26 UT, post-peak–main phase), and Scan 5 (08:39–08:51 UT, decay). Each row corresponds to a scan. The columns show, from left to right, temperature (T) and LOS velocity (v_LOS) maps at three optical depths (log τ = 0.0, −2.0, −4.0). Positive (red) velocities indicate downflows, while negative (blue) velocities indicate upflows. The gray contours at T= 5.5 kK (log τ = 0.0) highlight the pores at the photosphere and the dotted lines are the location of the flare ribbons.