Thank your lucky stairs.

Confirmation from a native:  "Even for Amsterdam, those stairs are pretty steep."  Have-to-rotate-45-degrees-to-navigate-them steep.  Trust-your-railings-with-your-neck steep.  Take-a-black-eye-from-your-bicycle-handlebar-en-route-from-front-door-to-first-landing steep.  Behold, the staircase, which no photograph from mine hand can do justice.