You just wait; most companies don't get back to you after a day, even if they liked you. They have hoops to jump through to look over everyone's applications and interviews again, approve everything with their seniors, decide on whether your shift availability is right for them, etc. Just wait a few days and see what happens. It's not going to go down well if you keep bugging them with emails about whether you got it or not, as they most likely don't know themselves who they're giving jobs to yet.