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(max-width:768px){:root{--section-px:1.2rem;--section-py:2.5rem;--nav-h:60px}.navbar-nav{display:none}.navbar-burger{display:flex}.hero{min-height:70vh}.hero-content{max-width:100%}.contact-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:1.8rem}.grid-2,.grid-3{grid-template-columns:1fr}.grid-4{grid-template-columns:repeat(2,1fr)}.product-grid{grid-template-columns:repeat(2,1fr);gap:1rem}.admin-sidebar{transform:translate(-100%)}.admin-sidebar.open{transform:translate(0)}.admin-main{margin-left:0}.admin-menu-btn{display:flex}.data-table th,.data-table td{padding:.65rem .8rem}.modal{max-height:95vh}.categories-grid{grid-template-columns:repeat(3,1fr)}.footer-bottom{text-align:center;flex-direction:column;gap:.6rem}}@media (max-width:480px){.product-grid{grid-template-columns:1fr 1fr;gap:.75rem}.categories-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr}.grid-4{grid-template-columns:1fr 1fr}.hero-actions{flex-direction:column;align-items:flex-start}.login-card{padding:2rem 1.4rem}.btn-lg{padding:.85rem 1.8rem}}