Spectrum of Q 2310-3358 obtained with VLT/X-Shooter (black curve), with the positions of the prominent quasar emission lines indicated by dashed purple lines. The blue curve represents the composite quasar spectrum from Selsing et al. (2016). A reddened template is plotted in red using the best-fit extinction parameters, along with the addition of a Lyα absorption line corresponding to log N(H I) = 21.21 ± 0.003. The inset provides a zoomed-in view of the Lyα line from the absorber. Gray bands mark the regions where the spectrum is unreliable due to X-Shooter arm overlaps and telluric absorption.