How to use this result
This planner is for the common problem where the room still feels awake even after the person has decided to go to bed. It turns a target sleep time into a sequence of light changes, screen boundaries and the original Drift-style fade window.
Use it when you already know roughly when you want to sleep but need a calmer final hour. The output keeps the first action simple: end bright light, move the phone out of the pillow zone, then let the last warm light drop gradually.
It avoids exact biological claims. A bedside routine depends on brightness, distance, habit, stress and the room itself, so the result is a planning band rather than a measurement.
Run the tool, choose one change, repeat it for two or three nights, then compare the room notes. A repeated pattern is more useful than one perfect-looking number.
