  We solve the sup-norm problem for spherical Hecke-Maass newforms of
square-free level for the group GL(2) over a number field, with a power saving
over the local geometric bound simultaneously in the eigenvalue and the level
aspect. Our bounds feature a Weyl-type exponent in the level aspect, they
reproduce or improve upon all known special cases, and over totally real fields
they are as strong as the best known hybrid result over the rationals.
