The arrangement of the small blue square frames on the wall and the large abstract artwork above the fireplace.
The choice and placement of lighting, although not prominently visible, would be part of the design.
The selection and arrangement of the chairs, table, and lounge chair.
The placement of indoor plants, adding a touch of greenery.
The decorative items on the table, such as the vase with flowers and the sculpture.
The design and material of the fireplace.
The choice of rugs and flooring material to complement the overall decor.
The overall color palette and how different elements are coordinated.
Although not clearly visible, window treatments (curtains, blinds, etc.) would be part of the design.