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img{width:100%;height:100%;object-fit:cover}@media(max-width:640px){.nav{padding:10px 16px;flex-wrap:wrap}.brand{font-size:20px}.brand-sub{display:none}.nav-links a{padding:6px 10px;font-size:13px}.hero{padding:36px 24px}.hero h1{font-size:30px}.form-row,.ppt-layout{grid-template-columns:1fr}.ppt-nav.prev{left:8px}.ppt-nav.next{right:8px}.grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px}}