Online fashion retailer Zalando slipped into the red in the first quarter as sales declined 1.5% to €2.2 billion ($2.3 billion), the Berlin-based company reported on Thursday. Zalando booked a first-quarter net loss of €61.3 million compared to a profit of €34.5 million one year ago. The company had benefited significantly from the pandemic in the past two years, after consumers shifted their brick-and-mortar purchases online. But this trend has normalized as restrictions fall away. Zalando has also been impacted by deteriorating consumer sentiment, disruptions in the supply chain, and rising …