# 3D card flip trio > **Build brief for a coding agent.** Rebuild this piece in the reader's stack. If they haven't said which stack, ask once, then default to semantic HTML + CSS + a little vanilla JS. Match the numbers below; don't "improve" them. ## What it is A row of three 340×214px cards in a banking wallet: a debit card, a concert ticket and an advisor profile. Each card is a single `