/* AI books are part of the same monochrome library, not a separate visual brand. */
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@media(max-width:1100px){.ai-library-grid{gap:28px}.ai-library-card{grid-template-columns:120px minmax(0,1fr);gap:20px}.ai-library-card h3{font-size:29px}}
@media(max-width:780px){.ai-library-grid{grid-template-columns:1fr;gap:10px}.ai-library-card{grid-template-columns:110px minmax(0,1fr);gap:20px;padding:25px 0}.ai-library-card h3{font-size:30px}.ai-home-checkout{grid-template-columns:1fr;padding:22px;gap:20px}.ai-home-field-grid,.ai-library-topics{grid-template-columns:1fr}.ai-home-order-info h3{font-size:31px}.ai-library-topics{gap:15px}.ai-library .section-head{align-items:start}.ai-library-page .nav{flex-wrap:wrap}.ai-library-page .nav nav{gap:18px}}
@media(max-width:400px){.ai-library-card{grid-template-columns:90px minmax(0,1fr);gap:15px}.ai-library-card h3{font-size:26px}.ai-library-editions{gap:6px}.ai-library-editions button{font-size:10px;padding:10px}.ai-home-checkout{padding:17px}.ai-home-verify-row{gap:8px}}