I'd suggest white oak floors finished with Bona Traffic finish for a light non-glossy look.
For tiles in the bathroom, 12 x 24 in solid colors would give you a contemporary look.
The showers should have frameless glass as shown below and chrome would be my finish of choice.

In the bathrooms, I suggest wall hung cabinets for a more spacious, contemporary look. The fact that the cabinets are mounted about a foot off the floor, allowing the floor to be seen, makes the room look larger.

In your kitchen, quartz countertops give a more contemporary look than granite, although you could consider granite for your island where granite movement is eye catching, and quartz for the wall cabinets.