Coffee can feel like a small miracle in a mug. The smell alone can change the tone of a morning. The first few sips can make the mind feel sharper, the mood feel lighter, and the day feel a little more possible. Then, for some people, the bill comes due. Not always right away. Sometimes the downside shows up later that day. Sometimes it appears the next morning, or even after a few days of drinking more than usual. Sleep gets lighter. Patience gets thinner. Small annoyances f