No, only Gothic style architecture developed from the Gothic period. Fashion came later in the neo-gothic era.

Shadow is not inherently gothic. Gothic typically refers to a style of architecture, fashion, or fiction that is characterized by its dark and mysterious elements. While shadows can be associated with darkness or mystery, they are not exclusive to the gothic aesthetic.

The Palace of Westminster was built in the Victorian era and the architectural fashion at the time was to build mock Gothic buildings.

One can identify as gothic by having an interest in gothic literature, fashion, music, art, or culture, as well as embracing the gothic attitude or mindset which often involves a fascination with the darker aspects of life. Personal style and interests aligned with gothic aesthetics are common indicators as well.

The gothic movement had nothing to do with depression. It was a subculture of young people who dressed a certain way to match the feel of the music they listened to.