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768px){.container{padding:16px}.header{padding:12px 16px}.card{padding:16px}.top-nav{gap:4px}.nav-link{padding:6px 10px;font-size:12px}h1{font-size:24px}h2{font-size:18px}h3{font-size:16px}.hero-content h1{font-size:32px}.hero-content p{font-size:16px}.features-grid{grid-template-columns:1fr}.steps{flex-direction:column}.step-arrow{transform:rotate(90deg);margin:12px 0}.auth-card{padding:24px}}