March 2, 2017 7:26 AM EST

How does a company known for simple, sleek, paradigm-shifting gadgets design a 175-acre campus? Apple’s answer: a lot like its technology. The ring-shaped main building, which is the centerpiece of Apple’s new Cupertino, Calif., headquarters (opening in April), is made of curved glass panels, a nod to the iPhone’s rounded corners; inside, designers say they obsessed over details like minimalist signs and smooth door handles. And just as you can’t see machinery within its products, Apple required that no vents or pipes be reflected in the glass.

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This appears in the March 13, 2017 issue of TIME.

Write to Julia Zorthian at julia.zorthian@time.com.

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