  A holographic model of probe quarkonia is presented, where the dynamical
gravity-dilaton background is adjusted to the thermodynamics of 2 +1 flavor QCD
with physical quark masses. The quarkonia action is modified to account for a
systematic study of the heavy-quark mass dependence. We focus on the $J/\psi$
and $\Upsilon$ spectral functions and relate our model to heavy quarkonia
formation as a special aspect of hadron phenomenology in heavy-ion collisions
at LHC.
