:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #dbeafe;--success: #16a34a;--success-light: #dcfce7;--warning: #d97706;--warning-light: #fef3c7;--danger: #dc2626;--danger-light: #fee2e2;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-500: #6b7280;--gray-700: #374151;--gray-900: #111827;--radius: 12px;--radius-sm: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .1), 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06)}*{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-tap-highlight-color:transparent}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--gray-50);color:var(--gray-900);line-height:1.5;min-height:100vh}button,input,select,textarea{font-family:inherit;font-size:1rem}a{color:var(--primary);text-decoration:none}img{max-width:100%;height:auto}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;padding-top:16px;padding-bottom:32px}.navbar{background:#fff;box-shadow:var(--shadow);position:sticky;top:0;z-index:100}.navbar-container{max-width:1200px;margin:0 auto;padding:0 16px;display:flex;align-items:center;justify-content:space-between;height:60px}.navbar-logo{font-size:1.5rem;font-weight:800;color:var(--primary)}.navbar-toggle{display:flex;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}.navbar-toggle span{display:block;width:24px;height:2px;background:var(--gray-700);transition:all .3s}.navbar-menu{display:none;position:absolute;top:60px;left:0;right:0;background:#fff;flex-direction:column;padding:16px;box-shadow:var(--shadow-md);gap:8px}.navbar-menu.open{display:flex}.navbar-link{padding:12px 16px;border-radius:var(--radius-sm);color:var(--gray-700);font-weight:500;display:flex;align-items:center;gap:8px}.navbar-link:hover{background:var(--gray-100)}.navbar-logout{background:none;border:none;cursor:pointer;text-align:left;color:var(--danger)}.notification-link{position:relative}.notification-badge{background:var(--danger);color:#fff;font-size:.7rem;padding:2px 6px;border-radius:9999px;min-width:18px;text-align:center}@media (min-width: 768px){.navbar-toggle{display:none}.navbar-menu{display:flex!important;position:static;flex-direction:row;padding:0;box-shadow:none;align-items:center}}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}.card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border:none;border-radius:var(--radius-sm);font-weight:600;cursor:pointer;transition:all .2s;text-align:center;width:100%}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-success{background:var(--success);color:#fff}.btn-success:hover:not(:disabled){background:#15803d}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:#b91c1c}.btn-secondary{background:var(--gray-200);color:var(--gray-700)}.btn-secondary:hover:not(:disabled){background:var(--gray-300)}.btn-outline{background:transparent;border:2px solid var(--primary);color:var(--primary)}.btn-outline:hover:not(:disabled){background:var(--primary-light)}.btn-sm{padding:8px 12px;font-size:.875rem}.form-group{margin-bottom:16px}.form-label{display:block;margin-bottom:6px;font-weight:500;color:var(--gray-700)}.form-input,.form-select,.form-textarea{width:100%;padding:12px;border:1px solid var(--gray-300);border-radius:var(--radius-sm);background:#fff}.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.form-textarea{min-height:100px;resize:vertical}.badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:9999px;font-size:.75rem;font-weight:600}.badge-blue{background:var(--primary-light);color:var(--primary-dark)}.badge-green{background:var(--success-light);color:var(--success)}.badge-yellow{background:var(--warning-light);color:var(--warning)}.badge-red{background:var(--danger-light);color:var(--danger)}.badge-gray{background:var(--gray-100);color:var(--gray-700)}.status-pending{background:var(--warning-light);color:var(--warning)}.status-paid{background:var(--success-light);color:var(--success)}.status-processing,.status-shipped{background:var(--primary-light);color:var(--primary-dark)}.status-delivered{background:var(--success-light);color:var(--success)}.status-cancelled{background:var(--danger-light);color:var(--danger)}.status-collecting{background:#ede9fe;color:#7c3aed}.status-awaiting_payment{background:var(--warning-light);color:var(--warning)}.status-sent_to_factory,.status-factory_received{background:var(--primary-light);color:var(--primary-dark)}.text-sm{font-size:.875rem}.text-xs{font-size:.75rem}.text-gray{color:var(--gray-500)}.text-center{text-align:center}.font-semibold{font-weight:600}.font-bold{font-weight:700}.mt-1{margin-top:4px}.mt-2{margin-top:8px}.mt-3{margin-top:12px}.mt-4{margin-top:16px}.mb-1{margin-bottom:4px}.mb-2{margin-bottom:8px}.mb-3{margin-bottom:12px}.mb-4{margin-bottom:16px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.gap-2{gap:8px}.gap-3{gap:12px}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.flex-1{flex:1}.loading{text-align:center;padding:40px;color:var(--gray-500)}.error{background:var(--danger-light);color:var(--danger);padding:12px;border-radius:var(--radius-sm);margin-bottom:16px}.empty{text-align:center;padding:40px 20px;color:var(--gray-500)}.hero{background:linear-gradient(135deg,var(--primary) 0%,#7c3aed 100%);color:#fff;border-radius:var(--radius);padding:40px 24px;text-align:center;margin-bottom:24px}.hero h1{font-size:2rem;margin-bottom:16px}.hero p{font-size:1.1rem;opacity:.9;max-width:600px;margin:0 auto 24px}.hero-actions{display:flex;flex-direction:column;gap:12px;justify-content:center;max-width:300px;margin:0 auto}.hero-actions .btn{width:100%}.features{display:grid;grid-template-columns:1fr;gap:16px}.feature{background:#fff;border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.feature h3{margin-bottom:8px;color:var(--gray-900)}.feature p{color:var(--gray-500)}.auth-card{max-width:420px;margin:0 auto;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.product-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}.product-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.product-image{width:100%;aspect-ratio:1;overflow:hidden;background:var(--gray-100)}.product-image img{width:100%;height:100%;object-fit:cover}.product-info{padding:16px;display:flex;flex-direction:column;flex:1}.product-category{font-size:.75rem;color:var(--gray-500);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px}.product-name{font-size:1.125rem;font-weight:700;margin-bottom:8px}.product-description{font-size:.875rem;color:var(--gray-500);margin-bottom:12px;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.product-meta{display:flex;align-items:baseline;gap:8px;margin-bottom:4px}.product-price{font-size:1.25rem;font-weight:700;color:var(--primary)}.product-weight{font-size:.875rem;color:var(--gray-500)}.product-min-order{font-size:.8rem;color:var(--gray-500);margin-bottom:12px}.quantity-control{display:flex;align-items:center;gap:8px}.quantity-control button{width:36px;height:36px;border:1px solid var(--gray-300);background:#fff;border-radius:var(--radius-sm);font-size:1.25rem;cursor:pointer;display:flex;align-items:center;justify-content:center}.quantity-control input{flex:1;text-align:center;padding:8px;border:1px solid var(--gray-300);border-radius:var(--radius-sm)}.category-filter{display:flex;flex-wrap:wrap;gap:8px}.category-filter .btn{width:auto}.campaign-banner{background:linear-gradient(135deg,#7c3aed,#2563eb);color:#fff;border-radius:var(--radius);padding:20px;margin-bottom:20px}.campaign-banner h2{font-size:1.5rem;margin-bottom:8px}.campaign-banner p{opacity:.9;margin-bottom:12px}.campaign-badge{display:inline-block;background:#fff3;padding:4px 12px;border-radius:9999px;font-size:.75rem;font-weight:700;margin-bottom:12px}.campaign-dates,.campaign-colors{font-size:.9rem;margin-bottom:8px}.campaign-timer{font-size:1.1rem;font-weight:700}.countdown-timer.expired{color:var(--danger-light)}.cart-item{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--gray-200)}.cart-item-image{width:80px;height:80px;border-radius:var(--radius-sm);overflow:hidden;background:var(--gray-100);flex-shrink:0}.cart-item-image img{width:100%;height:100%;object-fit:cover}.cart-item-info{flex:1}.cart-item-name{font-weight:600;margin-bottom:4px}.cart-item-meta{font-size:.875rem;color:var(--gray-500);margin-bottom:8px}.cart-item-price{color:var(--primary);font-weight:700}.cart-summary{background:var(--gray-100);border-radius:var(--radius-sm);padding:16px;margin-top:16px}.cart-summary-row{display:flex;justify-content:space-between;margin-bottom:8px}.cart-summary-total{display:flex;justify-content:space-between;font-size:1.25rem;font-weight:700;border-top:2px solid var(--gray-300);padding-top:12px;margin-top:12px}.order-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:12px}.order-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px}.order-card-id{font-weight:700;color:var(--gray-700)}.order-card-date{font-size:.875rem;color:var(--gray-500)}.order-card-items{font-size:.875rem;color:var(--gray-500);margin-bottom:12px}.order-card-footer{display:flex;justify-content:space-between;align-items:center}.order-card-price{font-size:1.125rem;font-weight:700;color:var(--primary)}.table-responsive{overflow-x:auto}.data-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.data-table th,.data-table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--gray-200)}.data-table th{background:var(--gray-100);font-weight:600;font-size:.875rem}.data-table tr:hover{background:var(--gray-50)}.filters{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}.filters select,.filters input{padding:10px 14px;border:1px solid var(--gray-300);border-radius:var(--radius-sm);background:#fff;min-width:160px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:200;padding:16px}.modal{background:#fff;border-radius:var(--radius);width:100%;max-width:600px;max-height:90vh;overflow-y:auto;padding:24px}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.modal-close{background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--gray-500)}.admin-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:24px}.admin-stat-card{background:#fff;border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);text-align:center}.admin-stat-value{font-size:2rem;font-weight:800;color:var(--primary)}.admin-stat-label{font-size:.875rem;color:var(--gray-500)}.admin-menu{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.admin-menu-item{background:#fff;border-radius:var(--radius);padding:20px 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