:root {
    --primary: #0A1142;
    --primary-light: #151E5C;
    --primary-dark: #060A2A;
    --accent: #2563EB;
    --accent-hover: #1D4ED8;
    --bg: #f7fafc;
    --white: #ffffff;
    --gray-50: #f8f9fa;
    --gray-100: #edf2f7;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e0;
    --gray-400: #a0aec0;
    --gray-500: #718096;
    --gray-600: #4a5568;
    --gray-700: #2d3748;
    --gray-800: #1a202c;
    --success: #38a169;
    --warning: #d69e2e;
    --info: #3182ce;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', -apple-system, sans-serif; background: var(--bg); color: var(--gray-700); font-size: 14px; line-height: 1.6; }
a { text-decoration: none; color: var(--primary-light); transition: color .2s; }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; }

/* Top Bar */
.top-bar { background: var(--gray-100); border-bottom: 1px solid var(--gray-200); padding: 6px 0; font-size: 12px; color: var(--gray-500); }
.top-bar a { color: var(--gray-500); margin-left: 16px; }
.top-bar a:hover { color: var(--primary); }

/* Header */
.header { background: var(--primary); padding: 12px 0; box-shadow: var(--shadow-md); position: sticky; top: 0; z-index: 100; }
.header-inner { max-width: 1280px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--white); font-weight: 800; font-size: 24px; letter-spacing: -0.5px; flex-shrink: 0; }
.logo i { font-size: 22px; color: #fbd38d; }
.logo span { color: #fbd38d; }
.logo small { font-size: 10px; font-weight: 400; display: block; letter-spacing: 1.5px; text-transform: uppercase; color: rgba(255,255,255,0.7); margin-top: -2px; }

/* Nav */
.nav-links { display: flex; gap: 4px; flex-shrink: 0; }
.nav-links a { color: rgba(255,255,255,0.85); padding: 8px 14px; border-radius: var(--radius); font-weight: 500; font-size: 13px; transition: all .2s; }
.nav-links a:hover, .nav-links a.active { background: rgba(255,255,255,0.15); color: var(--white); }

/* Search */
.search-box { flex: 1; max-width: 520px; position: relative; }
.search-box input { width: 100%; padding: 10px 44px 10px 16px; border: 2px solid transparent; border-radius: var(--radius); font-size: 14px; font-family: inherit; background: rgba(255,255,255,0.95); transition: all .2s; }
.search-box input:focus { outline: none; border-color: #fbd38d; background: var(--white); }
.search-box input::placeholder { color: var(--gray-400); }
.search-box button { position: absolute; right: 4px; top: 50%; transform: translateY(-50%); background: var(--primary-light); border: none; color: var(--white); width: 36px; height: 36px; border-radius: 4px; cursor: pointer; font-size: 15px; transition: background .2s; }
.search-box button:hover { background: var(--accent); }

/* Auth Links */
.auth-links { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.auth-links a { color: rgba(255,255,255,0.85); font-size: 13px; font-weight: 500; white-space: nowrap; }
.auth-links a:hover { color: #fbd38d; }
.auth-links .user-badge { background: rgba(255,255,255,0.15); padding: 5px 12px; border-radius: 20px; font-size: 12px; }
.profile-menu { position: relative; }
.profile-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: none;
    color: rgba(255,255,255,0.85);
    cursor: pointer;
    padding: 0;
    font: inherit;
}
.profile-toggle:hover { color: #fbd38d; }
.profile-toggle i.fa-chevron-down { font-size: 10px; opacity: .7; }
.profile-dropdown {
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    min-width: 180px;
    box-shadow: var(--shadow-md);
    display: none;
    z-index: 200;
}
.profile-dropdown a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    color: var(--gray-700);
    font-size: 12px;
}
.profile-dropdown a:hover { background: var(--gray-50); color: var(--primary); }
.profile-menu:hover .profile-dropdown { display: block; }
.profile-menu.open .profile-dropdown { display: block; }

/* Container */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* Breadcrumb */
.breadcrumb-bar { background: var(--white); border-bottom: 1px solid var(--gray-200); padding: 10px 0; }
.breadcrumb { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--gray-400); flex-wrap: wrap; }
.breadcrumb a { color: var(--gray-500); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--gray-300); }

/* Page Title */
.page-title { padding: 24px 0 16px; }
.page-title h1 { font-size: 26px; font-weight: 800; color: var(--gray-800); text-transform: uppercase; letter-spacing: -0.3px; }

/* Layout */
.catalog-layout { display: grid; grid-template-columns: 260px 1fr; gap: 24px; padding-bottom: 40px; }
@media (max-width: 768px) { .catalog-layout { grid-template-columns: 1fr; } }

/* Sidebar */
.sidebar { position: sticky; top: 80px; align-self: start; }
.sidebar-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); margin-bottom: 16px; overflow: hidden; }
.sidebar-card-header { padding: 12px 16px; font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: .5px; color: var(--gray-600); border-bottom: 1px solid var(--gray-100); background: var(--gray-50); }
.sidebar-search { padding: 10px 12px; border-bottom: 1px solid var(--gray-100); }
.sidebar-search input { width: 100%; padding: 7px 10px; border: 1px solid var(--gray-200); border-radius: 4px; font-size: 12px; font-family: inherit; }
.sidebar-search input:focus { outline: none; border-color: var(--primary-light); }

.cat-tree { list-style: none; padding: 0; }
.cat-tree li { border-bottom: 1px solid var(--gray-100); }
.cat-tree li:last-child { border-bottom: none; }
.cat-tree-item { display: flex; justify-content: space-between; align-items: stretch; transition: all .15s; }
.cat-tree-item:hover { background: var(--gray-50); }
.cat-tree-item a { flex-grow: 1; display: flex; justify-content: space-between; align-items: center; padding: 9px 16px; font-size: 13px; font-weight: 600; color: var(--gray-700); }
.cat-tree-item a:hover { color: var(--primary); }
.cat-tree-item a .count { font-weight: 400; color: var(--gray-400); font-size: 11px; }
.cat-tree > li.active > .cat-tree-item { background: #ebf4ff; border-left: 3px solid var(--primary); }
.cat-tree > li.active > .cat-tree-item a { color: var(--primary); }
.cat-tree-toggle { padding: 0 16px; display: flex; align-items: center; cursor: pointer; color: var(--gray-400); font-size: 10px; transition: color 0.2s; }
.cat-tree-toggle:hover { color: var(--primary); }
.cat-subtree { list-style: none; padding: 4px 0; background: var(--gray-50); border-top: 1px solid var(--gray-100); }
.cat-subtree li { border-bottom: none; }
.cat-subtree li a { display: flex; justify-content: space-between; padding: 6px 16px 6px 30px; font-size: 12px; color: var(--gray-500); }
.cat-subtree li a:hover { color: var(--primary); }
.cat-subtree li.active a { color: var(--primary); font-weight: 600; }

/* Spec Filters */
.filter-group { padding: 10px 16px; border-bottom: 1px solid var(--gray-100); }
.filter-group:last-child { border-bottom: none; }
.filter-group label { display: block; font-weight: 600; font-size: 11px; color: var(--gray-600); text-transform: uppercase; margin-bottom: 6px; letter-spacing: .3px; }
.filter-group select { width: 100%; padding: 6px 8px; border: 1px solid var(--gray-200); border-radius: 4px; font-size: 12px; font-family: inherit; background: var(--white); }
.filter-group select:focus { outline: none; border-color: var(--primary-light); }
.filter-actions { padding: 10px 16px; display: flex; gap: 8px; }
.btn-filter { padding: 7px 14px; border: none; border-radius: 4px; font-size: 12px; font-weight: 600; cursor: pointer; font-family: inherit; transition: all .2s; }
.btn-filter-primary { background: var(--primary); color: var(--white); }
.btn-filter-primary:hover { background: var(--primary-dark); }
.btn-filter-secondary { background: var(--gray-200); color: var(--gray-600); }
.btn-filter-secondary:hover { background: var(--gray-300); }

/* Cards Grid */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.card-item { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 20px; text-align: center; transition: all .25s; cursor: pointer; position: relative; }
.card-item:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card-item .card-icon { height: 70px; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; color: var(--gray-300); font-size: 36px; }
.card-item .card-icon img { max-height: 70px; object-fit: contain; }
.card-item h3 { font-size: 13px; font-weight: 700; color: var(--gray-800); text-transform: uppercase; margin-bottom: 4px; line-height: 1.3; }
.card-item .card-count { font-size: 12px; color: var(--gray-400); }
.card-item a.card-link { position: absolute; inset: 0; z-index: 1; }

/* Product List */
.product-list-item { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 16px 20px; display: grid; grid-template-columns: 80px 1fr auto; gap: 16px; align-items: start; margin-bottom: 12px; transition: border-color .2s; }
.product-list-item:hover { border-color: var(--primary-light); }
.product-thumb { width: 80px; height: 80px; background: var(--gray-50); border-radius: 4px; display: flex; align-items: center; justify-content: center; overflow: hidden; flex-shrink: 0; }
.product-thumb img { max-width: 100%; max-height: 100%; object-fit: contain; }
.product-thumb i { font-size: 28px; color: var(--gray-300); }
.product-info { min-width: 0; }
.product-info h3 { font-size: 16px; font-weight: 700; color: var(--gray-800); margin-bottom: 2px; text-transform: uppercase; }
.product-info h3 a { color: inherit; }
.product-info h3 a:hover { color: var(--primary); }
.product-info .product-brand { font-size: 13px; color: var(--info); font-weight: 600; margin-bottom: 4px; }
.product-info .product-desc { font-size: 12px; color: var(--gray-500); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-info .product-sku { font-size: 11px; color: var(--gray-400); margin-top: 4px; }
.product-info .datasheet-link { font-size: 12px; color: var(--info); margin-top: 6px; display: inline-block; }
.product-info .datasheet-link i { margin-right: 4px; }

.product-price-col { text-align: right; min-width: 140px; }
.stock-badge { display: inline-block; padding: 3px 10px; border-radius: 4px; font-size: 11px; font-weight: 700; margin-bottom: 8px; }
.stock-in { background: #e6ffed; color: var(--success); }
.stock-out { background: #fed7d7; color: var(--accent); }
.price-tag { font-size: 18px; font-weight: 800; color: var(--gray-800); }
.price-login { font-size: 12px; color: var(--gray-400); padding: 8px 0; }
.price-login a { color: var(--info); font-weight: 600; }
.product-count-bar { font-size: 13px; color: var(--gray-600); font-weight: 600; margin-bottom: 16px; padding: 10px 14px; background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); display: flex; justify-content: space-between; align-items: center; }

/* Product Detail */
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 24px; }
@media (max-width: 768px) { .detail-grid { grid-template-columns: 1fr; } }
.detail-image { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 30px; display: flex; align-items: center; justify-content: center; min-height: 300px; }
.detail-image img { max-height: 280px; object-fit: contain; }
.detail-image i { font-size: 80px; color: var(--gray-200); }
.detail-info h1 { font-size: 24px; font-weight: 800; color: var(--gray-800); margin-bottom: 4px; }
.detail-info .detail-brand { font-size: 15px; color: var(--info); font-weight: 700; margin-bottom: 10px; }
.detail-info .detail-desc { font-size: 13px; color: var(--gray-600); margin-bottom: 14px; line-height: 1.6; }
.detail-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.detail-actions a { font-size: 12px; font-weight: 600; padding: 6px 12px; background: var(--gray-100); border: 1px solid var(--gray-200); border-radius: 4px; color: var(--gray-700); transition: all .2s; }
.detail-actions a:hover { background: var(--primary); color: var(--white); border-color: var(--primary); }
.detail-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--gray-200); border-radius: var(--radius); overflow: hidden; }
.detail-meta-item { padding: 10px 14px; border-bottom: 1px solid var(--gray-100); font-size: 13px; }
.detail-meta-item:nth-child(odd) { background: var(--gray-50); border-right: 1px solid var(--gray-100); }
.detail-meta-label { font-weight: 600; color: var(--gray-600); font-size: 11px; text-transform: uppercase; }
.detail-meta-value { color: var(--gray-800); }

.detail-price-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 20px; }
.detail-price-card .price-big { font-size: 28px; font-weight: 800; color: var(--gray-800); margin-bottom: 6px; }

/* Specs Table */
.specs-section { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); margin-bottom: 20px; overflow: hidden; }
.specs-section-header { padding: 14px 20px; font-size: 16px; font-weight: 700; color: var(--gray-800); border-bottom: 1px solid var(--gray-200); background: var(--gray-50); text-transform: uppercase; }
.specs-table { width: 100%; border-collapse: collapse; }
.specs-table tr:not(:last-child) { border-bottom: 1px solid var(--gray-100); }
.specs-table td { padding: 10px 20px; font-size: 13px; }
.specs-table td:first-child { font-weight: 600; color: var(--gray-600); width: 40%; background: var(--gray-50); }
.specs-table td:last-child { color: var(--gray-800); }

/* Related */
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; margin-bottom: 40px; }
.related-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 16px; text-align: center; transition: all .2s; }
.related-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow); }
.related-card h4 { font-size: 13px; font-weight: 700; margin-top: 10px; color: var(--gray-800); }
.related-card .rel-brand { font-size: 11px; color: var(--gray-400); }

/* Footer */
.footer { background: var(--primary-dark); color: rgba(255,255,255,0.7); padding: 30px 0; margin-top: 40px; }
.footer-inner { max-width: 1280px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-brand { font-size: 18px; font-weight: 800; color: var(--white); }
.footer-brand span { color: #fbd38d; }
.footer small { font-size: 12px; }

/* Empty State */
.empty-state { text-align: center; padding: 60px 20px; color: var(--gray-400); }
.empty-state i { font-size: 48px; margin-bottom: 12px; display: block; }
.empty-state p { font-size: 14px; }

/* Pagination */
.pagination-wrap { display: flex; justify-content: center; margin: 24px 0 10px; }
.pagination-wrap nav { width: 100%; }
.pagination-wrap .pagination { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; }
.pagination-wrap .page-item { list-style: none; }
.pagination-wrap .page-link {
    padding: 7px 12px;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-600);
    background: var(--white);
    min-width: 34px;
    text-align: center;
    transition: all .15s;
}
.pagination-wrap .page-link:hover {
    border-color: var(--primary-light);
    color: var(--primary);
}
.pagination-wrap .page-item.active .page-link {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}
.pagination-wrap .page-item.disabled .page-link {
    color: var(--gray-300);
    border-color: var(--gray-100);
    background: var(--gray-50);
    cursor: not-allowed;
}

/* Utilities */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mt-16 { margin-top: 16px; }

/* Customer Profile */
.profile-wrap { max-width: 900px; margin: 24px auto 40px; }
.profile-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.profile-header { padding: 18px 20px; border-bottom: 1px solid var(--gray-100); background: var(--gray-50); display: flex; align-items: center; justify-content: space-between; }
.profile-header h1 { font-size: 20px; font-weight: 800; color: var(--gray-800); }
.profile-body { padding: 20px; }
.profile-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.profile-field label { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: .4px; color: var(--gray-600); font-weight: 600; margin-bottom: 6px; }
.profile-field input, .profile-field textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
}
.profile-field textarea { min-height: 90px; resize: vertical; }
.profile-field input:focus, .profile-field textarea:focus { outline: none; border-color: var(--primary-light); }
.profile-field .readonly { background: var(--gray-50); color: var(--gray-500); cursor: not-allowed; }
.profile-actions { display: flex; justify-content: flex-end; margin-top: 16px; }
.profile-actions button { border: none; background: var(--primary); color: var(--white); padding: 10px 16px; border-radius: 6px; font-size: 13px; font-weight: 700; cursor: pointer; }
.profile-actions button:hover { background: var(--primary-dark); }
.profile-alert { margin-bottom: 14px; padding: 10px 12px; border-radius: 6px; font-size: 12px; }
.profile-alert.success { background: #e6ffed; color: var(--success); }
.profile-alert.error { background: #fed7d7; color: var(--accent); }
.profile-note { font-size: 12px; color: var(--gray-500); margin-top: 8px; }
@media (max-width: 768px) {
    .profile-grid { grid-template-columns: 1fr; }
}

/* Catalog Password */
.password-wrap { max-width: 720px; margin: 24px auto 40px; background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); box-shadow: var(--shadow); }
.password-header { padding: 18px 20px; border-bottom: 1px solid var(--gray-100); background: var(--gray-50); }
.password-header h1 { font-size: 20px; font-weight: 800; color: var(--gray-800); }
.password-body { padding: 20px; }
.password-body label { display: block; font-size: 12px; font-weight: 700; text-transform: uppercase; color: var(--gray-600); margin-bottom: 6px; letter-spacing: .4px; }
.password-body input { width: 100%; padding: 10px 12px; border: 1px solid var(--gray-200); border-radius: 6px; font-size: 14px; font-family: inherit; }
.password-body input:focus { outline: none; border-color: var(--primary-light); }
.password-actions { display: flex; justify-content: flex-end; margin-top: 16px; }
.password-actions button { border: none; background: var(--primary); color: var(--white); padding: 10px 16px; border-radius: 6px; font-size: 13px; font-weight: 700; cursor: pointer; }
.password-actions button:hover { background: var(--primary-dark); }
.password-alert { margin-bottom: 14px; padding: 10px 12px; border-radius: 6px; font-size: 12px; }
.password-alert.success { background: #e6ffed; color: var(--success); }
.password-alert.error { background: #fed7d7; color: var(--accent); }
.password-tip { margin-top: 10px; font-size: 12px; color: var(--gray-500); }
.password-field { margin-bottom: 14px; }