The kitchen in this Pacific Heights, San Francisco home is dominated by a hand-burnished stainless hood over the cooktop, its gleam reflected in the stainless backsplash and cooktop-area counters, gray poured-concrete floors and cooper inlays. A gently coved ceiling is echoed by a curved half-wall of integrally colored concrete that cradles the cooking space, separating it from a casual eating area near the dining room.