#plan{
  width:900px;
}



#B .seat6, #C .seat7, #D .seat7, #E .seat7, #I .seat7, #J .seat7, #K .seat6, #L .seat6, #M .seat6, #F .seat8, #G .seat8, #H .seat8{
  margin-right: 60px;
}



#B .seat19, #C .seat21, #D .seat22, #E .seat23, #F .seat24, #G .seat25, #H .seat26, #I .seat26, #J .seat27, #K .seat27, #L .seat28, #M .seat20{
  margin-right: 60px;
}


#M .seat13{
  margin-right: 180px;
}
#N{
  margin-bottom: 20px;
}
#N .seat16{
  margin-right: 180px;
}
#O .seat9{
  margin-right: 380px;
}