NOUN.
(həʊpˌpʌŋk)
"Stories in the hopepunk subgenre reject the fatalism and cynicism of grimdark [...] Hopepunk characters persevere, believing in the possibility of something better in the face of difficult realities. [...] A hopepunk narrative is driven by fierce caring and the will to fight for something. The worlds described in hopepunk works are not utopian or even necessarily hopeful; the genre is expressed in the ways characters approach issues."
One related concept is solarpunk, which "envisions how the future might look if humanity succeeded in solving major contemporary challenges with an emphasis on sustainability, climate change and pollution [...] where technology enables humanity to sustainably co-exist with its environment."