PA-18 Pilot reported losing the center of gravity while landing and had the plane nose over and hit the ground.

Narrative

Flight from ZZZ1 to ZZZ2 in PA-18. Persons on Board; pilot only. AWOS announced 10 kts. from 090. Flew left pattern to Runway 8. Right pattern is listed on charts. On downwind leg; noticed wind direction had clocked a bit more right. Anticipated a right crosswind on final. Base leg and final leg was nominal. The engine was in full idle (less than 600 RPM) upon landing; received a gust from the right which lifted the right wing and veered the aircraft to the left. Corrected with rudder and put in more right aileron. Recall that the stick was perhaps not in the far back right corner i.e. not full down elevator. Aircraft corrected to right and turn accelerated despite left rudder applied. As the tail of the aircraft started to get to the point that it might be to the left of the main wheels; I became concerned of a loss of control.At this point; the aircraft had slowed significantly and I thought a slight application of the brakes might improve the situation. The aircraft tail slowly lifted and then unfortunately went past the CG (Center of Gravity) and the aircraft nosed over completely. After shutting down the master and magnetos; I exited the aircraft and with the aid of a bystander we lifted the nose and moved the aircraft from the runway. Not giving full elevator authority resulted in the tail wheel not having sufficient traction to maintain directional control once the aircraft slowed past the effectiveness of the rudder. Application of brakes with elevator not in full authority allowed the tail to be light enough to allow the aircraft to nose over.