Present participle as an adverbial: "spend glued to screens" where "glued" is used as a present participle to show simultaneous actions, demonstrating the complexity of the issue.
Relative clause: "which isn't good for our health" is a relative clause modifying "sitting too much", providing additional information and adding complexity to the sentence.
Reason adverbial clause: "making it tough to get a good night's rest" uses a participle construction to express the reason, acting as a shortened adverbial clause of reason, explaining why blue light disrupts sleep, demonstrating the logic and coherence of the argument.