The symbol of the times is blue jeans not just blue jeans in good condition but jeans that are frayed,torn,discolored.

The symbol of the times 是主句主语， is blue jeans 是系表结构，那么not just blue jeans，这部分做主句的什么?

句子成分？其中not 和just都是副词却放在名词jeans前，它俩修饰那个词？看不懂这个主句中的not just blue jeans in.

good condition but jeans作的什么句子成份。