Oooo. Fancy.
Tough to say without seeing the plan. Given that there will be lots of steel and glass, and the general appearance of the house, I'd say that it'll be a complicated, high end custom home. Quick internet search says home building prices in Georgia range from $150 to $250 per square foot, sometimes up to $300. So at $250/sf, that puts total construction cost around $1.25M. Structural fee, including a 'complexity' up charge would be in the neighborhood of $12k to $14k.
If it's not as nice as it seems or not as complicated as I suspect, or if I'm really hungry for the work (need to pay some bills, really want to work with this architect, etc.), I might go as low as $9k.
This is the fee for design, bidding RFIs (within reason), and permit comment responses. Everything after that is hourly.
(I usually run through multiple pricing scenarios - expected effort x hourly rates + contingency, % of construction cost, and $/sf - and feel it out from there. In this market, I'll just take the highest of the three and see if it sticks. I'll never go lower than expected effort + contingency.