A family of five’s move from a single-family home into a luxury Gold Coast apartment created an opportunity to distill the lived-in charm of a sprawling house into a 21st-floor urban apartment. Every inch of the 4,500-square-foot space has been utilized, made beautiful, and is welcoming to kids who’ve been known to ride razor scooters through its sophisticated, yet relaxed, rooms. Colorful window treatments, pillows, accessories, and art lend playful decorative punctuation to glamorous spaces, giving the home a modern yet cozy feel. To wit: in the primary suite, a bench upholstered with a citrine-toned rug; in the iceberg-white kitchen, sunny, ombre-accented drapery. Throughout, distinctive light fixtures are especially central to the unique design. In the eggplant-saturated den, fifty exposed white balls hang from multi-colored electrical cords; in the living room, a sculptural curl of illumination dangles from the ceiling. Exuberant color and vivid pattern distinguish the children’s bedrooms, each a customized expression of individual interests that are testaments to the power of good design to grow along with their inhabitants. Elsewhere, keen attention to detail takes many forms: brass-wrapped drawers, a custom marble coffee table, a whimsical Hunt Slonem painting, and, of course, SHIIR rugs everywhere from the foyer to the powder room. The result is a happy, sky-high version of family-friendly livability.