In a toy world I am writing in, most of the stuff is fairly hard science fiction—I handwaved a warp drive with reasonable physics and basically nothing else, sticking entirely to technologies that we either already have or we know could work. However this is also set reasonably distant in the future, and there are a few particular individuals (at the top of society) who are able to wield existing technologies so well that it seems almost like magic.
This is sort of an instance of Clarketech, and in-Universe these people use the “magic” appearance of their usage of tech to their advantage to become revered as gods, despite being very much mortal and despite not actually wielding any real magic—all their technology still requires power, maintenance, coolant, etc. and otherwise works on ordinary physical principles, it is just very very very high end and they are extraordinarily good at using it.
How do I make clear to the readers that I’m not just introducing magic into the world when that is not something I am intending to do? Specifically regarding the description of these technologies: how do I deal with them (e.g. what diction to describe them, what details to focus on, what relevant scenes like maintenance etc. to include) to make sure that it does not appear like magic to the reader who is viewing the “magic” from out-of-Universe?