 Complete the following phrase:  In the 1980s manufacturers such as Hummel and Adidas began to design shirts with increasingly intricate designs, as new technology led to the introduction of such design elements as shadow prints and pinstripes. Hummels distinctive halved strip designed for the Danish national team for the 1986 FIFA World Cup caused a stir in the media but FIFA worried about moiré artefacts in television pictures. Shorts became shorter than ever during the 1970s and 1980s, and often included the players number on the front. In the 