BI Studios / Crate & Barrel ContractWalk into a restaurant, an office, or a lounge, and before you've consciously registered why, your mood has already shifted. You're feeling energized and alert, or relaxed and dreamy. That's the power of design. For any owner planning a buildout or a refresh, mood belongs in the plan from day one, alongside the floor plan and the budget.That's the idea behind what's often called a "third space" — somewhere tha…