Simplify the following text for a Grade 7 native English-speaking person.
Original: The Art Nouveau style however , was one that Mucha attempted to disassociate himself from throughout his life ; he always insisted that rather than maintaining any fashionable stylistic form , his paintings were entirely a product of himself and Czech art .
Simplified: The Art Nouveau style however , was one that Mucha attempted to distance himself from . He always insisted that his paintings came purely from within and from Czech art .