:root {
  --bg: #FFFFFF; --bg-subtle: #F8FAFC; --bg-card: #FFFFFF;
  --ink: #0F172A; --ink-muted: #475569; --ink-soft: #64748B; --ink-fade: #94A3B8;
  --border: #E2E8F0; --border-strong: #CBD5E1;
  --accent-red: #DC2626; --accent-red-soft: #FEF2F2;
  --success: #16A34A; --success-dark: #166534; --success-bg: #DCFCE7; --success-tint: #F0FDF4;
  --warning: #EA580C; --warning-dark: #92400E; --warning-bg: #FEF3C7;
  --shadow: 0 1px 2px rgba(15,23,42,.04);
  --shadow-lifted: 0 8px 24px rgba(15,23,42,.08);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}
* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: 'Geist', -apple-system, BlinkMacSystemFont, sans-serif; background: var(--bg); color: var(--ink); font-size: 14px; line-height: 1.5; -webkit-font-smoothing: antialiased; min-height: 100vh; }
body.no-scroll { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
button, .btn { font-family: inherit; font-size: 13px; font-weight: 500; border: none; cursor: pointer; transition: all .15s; border-radius: 6px; }
.btn-primary { background: var(--ink); color: var(--bg); padding: 11px 18px; min-height: 44px; }
.btn-primary:hover { background: #1E293B; }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-secondary { background: transparent; color: var(--ink); padding: 11px 18px; border: 1px solid var(--border-strong); min-height: 44px; }
.btn-secondary:hover { border-color: var(--ink); }
input[type="text"],input[type="email"],input[type="search"],input[type="password"],input[type="number"],input[type="url"],input[type="tel"],select,textarea {
  font-family: inherit; font-size: 16px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 11px 14px; color: var(--ink); outline: none; transition: border-color .15s; width: 100%; -webkit-appearance: none;
}
input:focus,select:focus,textarea:focus { border-color: var(--ink); }
.container { max-width: 1320px; margin: 0 auto; padding: 0 20px; }

/* Topbar */
.topbar { background: var(--ink); color: rgba(255,255,255,.85); font-size: 12px; padding: 9px 0; }
.topbar-inner { max-width: 1320px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.topbar-left { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar-right { display: flex; gap: 20px; flex-shrink: 0; }
.topbar a { color: rgba(255,255,255,.7); transition: color .15s; cursor: pointer; }
.topbar a:hover { color: var(--bg); }
.topbar i { font-size: 13px; vertical-align: -2px; margin-right: 4px; }

/* Header */
.header { background: var(--bg); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-main { max-width: 1320px; margin: 0 auto; padding: 14px 20px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 16px; }
.mobile-menu-btn { display: none; background: transparent; border: none; width: 40px; height: 40px; cursor: pointer; color: var(--ink); border-radius: 6px; align-items: center; justify-content: center; }
.mobile-menu-btn:hover { background: var(--bg-subtle); }
.mobile-menu-btn i { font-size: 24px; }
.logo { font-size: 18px; font-weight: 500; letter-spacing: -.3px; color: var(--ink); cursor: pointer; display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark { background: var(--ink); color: var(--bg); padding: 5px 10px; border-radius: 6px; font-size: 14px; font-weight: 600; }
.search-wrap { position: relative; max-width: 640px; width: 100%; justify-self: center; }
.search-wrap > i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); font-size: 18px; color: var(--ink-soft); pointer-events: none; }
.search-wrap input { padding-left: 42px; padding-right: 60px; height: 42px; background: var(--bg-subtle); border-color: transparent; }
.search-wrap input:focus { background: var(--bg); border-color: var(--ink); }
.search-shortcut { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); font-size: 11px; color: var(--ink-soft); background: var(--bg); padding: 3px 7px; border: 1px solid var(--border); border-radius: 4px; }
.header-actions { display: flex; align-items: center; gap: 2px; }
.header-icon-btn { background: transparent; border: none; width: 42px; height: 42px; display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--ink); position: relative; border-radius: 6px; }
.header-icon-btn:hover { background: var(--bg-subtle); }
.header-icon-btn i { font-size: 20px; }
.cart-badge { position: absolute; top: 6px; right: 4px; background: var(--accent-red); color: white; font-size: 10px; font-weight: 600; min-width: 18px; height: 18px; padding: 0 5px; border-radius: 9px; display: flex; align-items: center; justify-content: center; transition: transform .2s; }

/* Desktop nav */
.nav { border-top: 1px solid var(--border); }
.nav-inner { max-width: 1320px; margin: 0 auto; padding: 0 20px; display: flex; gap: 28px; align-items: center; font-size: 13px; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.nav-inner::-webkit-scrollbar { display: none; }
.nav-link { padding: 13px 0; color: var(--ink); cursor: pointer; transition: color .15s; white-space: nowrap; flex-shrink: 0; }
.nav-link:hover { color: var(--ink-muted); }
.nav-link.has-caret::after { content:''; display: inline-block; width: 6px; height: 6px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(45deg); margin-left: 6px; margin-bottom: 2px; }
.nav-link.deals { color: var(--accent-red); font-weight: 500; }
.nav-spacer { flex: 1; }
.nav-meta { font-size: 12px; color: var(--ink-soft); display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.nav-meta i { font-size: 14px; }
.nav-meta strong { color: var(--ink); font-weight: 500; }

/* Mobile nav drawer */
.mobile-nav-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.5); z-index: 199; opacity: 0; pointer-events: none; transition: opacity .2s; }
.mobile-nav-overlay.open { opacity: 1; pointer-events: auto; }
.mobile-nav { position: fixed; top: 0; left: 0; bottom: 0; width: 320px; max-width: 85vw; background: var(--bg); z-index: 200; transform: translateX(-100%); transition: transform .3s; display: flex; flex-direction: column; box-shadow: 4px 0 24px rgba(0,0,0,.1); }
.mobile-nav.open { transform: translateX(0); }
.mobile-nav-header { display: flex; justify-content: space-between; align-items: center; padding: 18px 20px; border-bottom: 1px solid var(--border); }
.mobile-nav-header .logo { font-size: 18px; }
.mobile-nav-close { background: transparent; border: none; width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--ink); border-radius: 6px; }
.mobile-nav-close:hover { background: var(--bg-subtle); }
.mobile-nav-close i { font-size: 22px; }
.mobile-nav-search { padding: 16px 20px; border-bottom: 1px solid var(--border); }
.mobile-nav-search .search-wrap input { background: var(--bg-subtle); }
.mobile-nav-body { flex: 1; overflow-y: auto; padding: 12px 0; }
.mobile-nav-section { padding: 14px 0; border-bottom: 1px solid var(--border); margin: 0 20px; }
.mobile-nav-section:last-child { border-bottom: none; }
.mobile-nav-section-label { font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); font-weight: 500; margin-bottom: 8px; padding-left: 0; }
.mobile-nav-item { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; font-size: 15px; color: var(--ink); cursor: pointer; }
.mobile-nav-item:hover { color: var(--accent-red); }
.mobile-nav-item i { font-size: 18px; color: var(--ink-fade); }
.mobile-nav-item.deals { color: var(--accent-red); font-weight: 500; }
.mobile-nav-footer { padding: 16px 20px; border-top: 1px solid var(--border); background: var(--bg-subtle); }
.mobile-nav-footer .meta { font-size: 12px; color: var(--ink-soft); display: flex; align-items: center; gap: 6px; margin-bottom: 6px; }
.mobile-nav-footer .meta i { font-size: 14px; }
.mobile-nav-footer .phone { font-size: 14px; font-weight: 500; color: var(--ink); display: block; padding: 8px 0; }

/* Hero */
.hero { background: var(--bg-subtle); border-bottom: 1px solid var(--border); padding: 56px 0 64px; }
.hero-inner { max-width: 1320px; margin: 0 auto; padding: 0 20px; display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px; align-items: center; }
.hero-eyebrow { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-soft); font-weight: 500; margin-bottom: 14px; }
.hero h1 { font-size: 48px; font-weight: 500; line-height: 1.08; letter-spacing: -.025em; color: var(--ink); margin-bottom: 18px; }
.hero p { font-size: 16px; color: var(--ink-muted); line-height: 1.55; max-width: 500px; margin-bottom: 28px; }
.hero-cta { display: flex; gap: 10px; margin-bottom: 36px; flex-wrap: wrap; }
.hero-cta .btn-primary, .hero-cta .btn-secondary { padding: 13px 22px; font-size: 14px; }
.hero-stats { display: flex; gap: 40px; padding-top: 24px; border-top: 1px solid var(--border-strong); flex-wrap: wrap; }
.hero-stat-num { font-size: 24px; font-weight: 500; color: var(--ink); margin-bottom: 4px; letter-spacing: -.01em; }
.hero-stat-label { font-size: 12px; color: var(--ink-soft); }
.hero-visual { background: var(--ink); aspect-ratio: 1; border-radius: 12px; position: relative; overflow: hidden; }
.hero-visual::before { content:''; position: absolute; inset: 0; background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.08), transparent 60%); }
.hero-visual-content { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: space-between; padding: 24px; color: var(--bg); }
.hero-visual-tag { display: inline-flex; align-items: center; gap: 8px; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: rgba(255,255,255,.7); font-weight: 500; }
.hero-visual-tag::before { content: ''; width: 6px; height: 6px; background: #4ADE80; border-radius: 50%; }
.hero-visual-icon { align-self: center; margin: auto; font-size: 140px; color: rgba(255,255,255,.12); }
.hero-visual-card { background: rgba(255,255,255,.08); backdrop-filter: blur(12px); border: 1px solid rgba(255,255,255,.12); border-radius: 10px; padding: 14px; }
.hero-visual-card .sku { font-size: 11px; color: rgba(255,255,255,.6); letter-spacing: .05em; font-weight: 500; margin-bottom: 4px; }
.hero-visual-card .name { font-size: 13px; color: var(--bg); margin-bottom: 8px; }
.hero-visual-card .price-row { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.hero-visual-card .price { font-size: 19px; font-weight: 500; color: var(--bg); }
.hero-visual-card .stock { font-size: 11px; color: #4ADE80; font-weight: 500; white-space: nowrap; }

/* Brand strip */
.brand-strip { border-bottom: 1px solid var(--border); padding: 20px 0; overflow: hidden; }
.brand-strip-inner { max-width: 1320px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; gap: 20px; }
.brand-strip-label { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-fade); flex-shrink: 0; font-weight: 500; }
.brand-list { display: flex; align-items: center; gap: 32px; flex: 1; justify-content: space-evenly; flex-wrap: wrap; }
.brand-name { font-size: 16px; font-weight: 500; color: #334155; cursor: pointer; transition: color .15s; white-space: nowrap; }
.brand-name:hover { color: var(--ink); }
.brand-sep { color: var(--border-strong); }

/* Section */
.section { padding: 56px 0; }
.section-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 24px; gap: 16px; flex-wrap: wrap; }
.section-title { font-size: 22px; font-weight: 500; letter-spacing: -.015em; line-height: 1.2; color: var(--ink); }
.section-subtitle { color: var(--ink-soft); font-size: 13px; margin-top: 4px; }
.section-link { display: flex; align-items: center; gap: 5px; font-size: 13px; color: var(--ink); cursor: pointer; flex-shrink: 0; }
.section-link:hover { color: var(--ink-muted); }
.section-link i { font-size: 16px; }

/* Categories grid */
.categories { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.category-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px; padding: 22px 18px; cursor: pointer; transition: border-color .15s, transform .15s; text-align: center; min-height: 130px; display: flex; flex-direction: column; justify-content: center; align-items: center; color: var(--ink); }
.category-card:hover, .category-card:active { border-color: var(--ink); transform: translateY(-2px); }
.category-card i { font-size: 28px; color: var(--ink); margin-bottom: 10px; }
.category-card-title { font-size: 13px; font-weight: 500; margin-bottom: 4px; line-height: 1.3; }
.category-card-count { font-size: 11px; color: var(--ink-fade); }

/* Product cards */
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.product-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; cursor: pointer; transition: box-shadow .2s, border-color .15s; display: flex; flex-direction: column; color: var(--ink); }
.product-card:hover, .product-card:active { box-shadow: var(--shadow-lifted); border-color: var(--border-strong); }
.product-card-image { background: var(--bg-subtle); aspect-ratio: 1; display: flex; align-items: center; justify-content: center; color: var(--ink-fade); position: relative; overflow: hidden; }
.product-card-image i { font-size: 48px; opacity: .4; }
.product-card-image img { width: 100%; height: 100%; object-fit: contain; padding: 16px; }
.product-card-badge { position: absolute; top: 8px; right: 8px; font-size: 9px; font-weight: 500; padding: 3px 7px; border-radius: 10px; letter-spacing: .02em; }
.badge-top { background: var(--success-bg); color: var(--success-dark); }
.badge-new { background: var(--warning-bg); color: var(--warning-dark); }
.product-card-body { padding: 12px 14px 14px; flex: 1; display: flex; flex-direction: column; }
.product-card-brand { font-size: 10px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft); font-weight: 500; margin-bottom: 4px; }
.product-card-title { font-size: 13px; font-weight: 500; line-height: 1.3; color: var(--ink); margin-bottom: 10px; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-card-footer { display: flex; justify-content: space-between; align-items: baseline; margin-top: auto; gap: 6px; }
.product-card-price { font-size: 15px; font-weight: 500; color: var(--ink); white-space: nowrap; }
.product-card-stock { font-size: 10px; font-weight: 500; white-space: nowrap; }
.stock-in { color: var(--success); }
.stock-low { color: var(--warning); }
.stock-out { color: var(--accent-red); }

/* Trust bar */
.trust-bar { background: var(--bg-subtle); padding: 28px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.trust-bar-inner { max-width: 1320px; margin: 0 auto; padding: 0 20px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.trust-item { display: flex; align-items: center; gap: 14px; }
.trust-icon { flex-shrink: 0; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; color: var(--ink); }
.trust-icon i { font-size: 22px; }
.trust-content h4 { font-size: 13px; font-weight: 500; margin-bottom: 2px; }
.trust-content p { font-size: 11px; color: var(--ink-soft); line-height: 1.4; }

/* Page header */
.page-header { padding: 32px 0 24px; border-bottom: 1px solid var(--border); }
.breadcrumb { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--ink-soft); margin-bottom: 14px; flex-wrap: wrap; }
.breadcrumb a { cursor: pointer; }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb .sep { color: var(--ink-fade); }
.breadcrumb .current { color: var(--ink); }
.page-title { font-size: 28px; font-weight: 500; letter-spacing: -.02em; margin-bottom: 8px; line-height: 1.15; }
.page-desc { color: var(--ink-muted); font-size: 14px; max-width: 720px; line-height: 1.55; }
.page-meta { margin-top: 14px; font-size: 12px; color: var(--ink-soft); }
.page-meta strong { color: var(--ink); font-weight: 500; }

/* Category listing */
.listing { display: grid; grid-template-columns: 220px 1fr; gap: 32px; padding: 28px 0 64px; }
.filter-toggle-btn { display: none; align-items: center; gap: 6px; padding: 10px 14px; background: var(--bg); border: 1px solid var(--border-strong); border-radius: 6px; font-size: 13px; cursor: pointer; font-weight: 500; color: var(--ink); }
.filter-toggle-btn i { font-size: 16px; }
.filter-sidebar { font-size: 13px; }
.filter-sidebar-header { display: none; padding: 16px 20px; border-bottom: 1px solid var(--border); justify-content: space-between; align-items: center; }
.filter-sidebar-header h3 { font-size: 16px; font-weight: 500; }
.filter-group { padding-bottom: 18px; margin-bottom: 18px; border-bottom: 1px solid var(--border); }
.filter-group:last-child { border-bottom: none; }
.filter-group-title { font-weight: 500; margin-bottom: 12px; font-size: 13px; }
.filter-option { display: flex; align-items: center; gap: 8px; padding: 8px 0; color: var(--ink-muted); cursor: pointer; font-size: 13px; min-height: 32px; }
.filter-option input { accent-color: var(--ink); }
.filter-option .count { margin-left: auto; font-size: 11px; color: var(--ink-fade); }
.listing-main { min-width: 0; }
.listing-toolbar { display: flex; justify-content: space-between; align-items: center; padding-bottom: 14px; margin-bottom: 20px; border-bottom: 1px solid var(--border); gap: 12px; flex-wrap: wrap; }
.active-filters { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.active-chip { display: inline-flex; align-items: center; gap: 5px; background: var(--bg-subtle); padding: 5px 10px; font-size: 11px; border-radius: 12px; color: var(--ink-muted); }
.active-chip i { font-size: 12px; cursor: pointer; }
.sort-dropdown { font-size: 12px; color: var(--ink-soft); display: flex; align-items: center; gap: 5px; cursor: pointer; }
.sort-dropdown strong { color: var(--ink); font-weight: 500; }
.listing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }

/* Product detail */
.product-detail { padding: 24px 0 72px; }
.product-layout { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; margin-bottom: 48px; }
.product-gallery { position: sticky; top: 120px; height: fit-content; }
.product-image-main { background: var(--bg-subtle); aspect-ratio: 1; margin-bottom: 10px; border-radius: 10px; display: flex; align-items: center; justify-content: center; color: var(--ink-fade); border: 1px solid var(--border); overflow: hidden; padding: 20px; }
.product-image-main i { font-size: 120px; opacity: .3; }
.product-image-main img { max-width: 100%; max-height: 100%; object-fit: contain; }
.product-image-thumbs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.product-thumb { background: var(--bg-subtle); aspect-ratio: 1; border: 1px solid var(--border); border-radius: 8px; cursor: pointer; display: flex; align-items: center; justify-content: center; color: var(--ink-fade); overflow: hidden; }
.product-thumb.active { border-color: var(--ink); border-width: 2px; }
.product-thumb i { font-size: 18px; opacity: .6; }
.product-thumb img { width: 100%; height: 100%; object-fit: contain; padding: 4px; }
.product-info .breadcrumb { margin-bottom: 16px; }
.product-brand-tag { font-size: 11px; color: var(--ink-soft); letter-spacing: .1em; font-weight: 500; text-transform: uppercase; margin-bottom: 8px; }
.product-brand-tag .sku { color: var(--ink); }
.product-title-main { font-size: 26px; font-weight: 500; letter-spacing: -.015em; line-height: 1.2; margin-bottom: 8px; }
.product-tagline { font-size: 14px; color: var(--ink-soft); line-height: 1.55; margin-bottom: 20px; }
.product-price-row { display: flex; align-items: baseline; gap: 10px; margin-bottom: 6px; flex-wrap: wrap; }
.product-price-main { font-size: 30px; font-weight: 500; letter-spacing: -.01em; }
.product-price-msrp { font-size: 13px; color: var(--ink-fade); text-decoration: line-through; }
.product-price-save { font-size: 11px; background: var(--success-bg); color: var(--success-dark); padding: 3px 8px; border-radius: 12px; font-weight: 500; }
.product-price-note { font-size: 13px; color: var(--ink-soft); margin-bottom: 14px; }
.product-stock-row { display: flex; align-items: center; gap: 8px; padding: 10px 12px; background: var(--success-tint); border-radius: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.product-stock-row .stock-label { font-weight: 500; color: var(--success-dark); font-size: 13px; }
.product-stock-row .stock-detail { font-size: 11px; color: var(--success); }
.product-actions { display: flex; gap: 8px; margin-bottom: 10px; }
.qty-selector { display: flex; align-items: center; border: 1px solid var(--border-strong); border-radius: 6px; height: 48px; }
.qty-selector button { width: 42px; height: 100%; background: transparent; font-size: 18px; color: var(--ink); border-radius: 0; }
.qty-selector input { width: 48px; text-align: center; border: none; background: transparent; height: 100%; padding: 0; font-size: 14px; font-size: 16px; }
.product-actions .btn-primary { flex: 1; height: 48px; padding: 0 20px; font-size: 14px; display: flex; align-items: center; justify-content: center; gap: 8px; }
.icon-btn-large { width: 48px; height: 48px; border: 1px solid var(--border-strong); background: transparent; border-radius: 6px; display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--ink); flex-shrink: 0; }
.product-quote-link { display: block; width: 100%; padding: 12px; text-align: center; border: 1px solid var(--border-strong); border-radius: 6px; font-size: 13px; color: var(--ink); margin-bottom: 22px; cursor: pointer; background: transparent; }
.product-specs { border-top: 1px solid var(--border); padding-top: 18px; }
.spec-row { display: flex; justify-content: space-between; padding: 7px 0; font-size: 13px; gap: 12px; }
.spec-label { color: var(--ink-soft); flex-shrink: 0; }
.spec-value { color: var(--ink); font-weight: 500; text-align: right; }
.product-tabs { border-top: 1px solid var(--border); padding-top: 28px; margin-bottom: 40px; }
.tab-nav { display: flex; gap: 24px; border-bottom: 1px solid var(--border); margin-bottom: 22px; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.tab-nav::-webkit-scrollbar { display: none; }
.tab-item { padding: 10px 0; font-size: 13px; color: var(--ink-soft); cursor: pointer; border-bottom: 2px solid transparent; display: flex; align-items: center; gap: 6px; white-space: nowrap; flex-shrink: 0; }
.tab-item.active { color: var(--ink); border-bottom-color: var(--ink); font-weight: 500; }
.tab-count { background: var(--bg-subtle); color: var(--ink-muted); font-size: 11px; padding: 1px 7px; border-radius: 10px; }
.tab-content { font-size: 14px; line-height: 1.7; color: var(--ink-muted); max-width: 800px; }
.tab-content p { margin-bottom: 14px; }
.tab-content strong { color: var(--ink); font-weight: 500; }
.docs-block { background: var(--bg-subtle); padding: 20px; margin-bottom: 40px; border-radius: 10px; border: 1px solid var(--border); }
.docs-block-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; gap: 8px; flex-wrap: wrap; }
.docs-block-title { font-size: 14px; font-weight: 500; display: flex; align-items: center; gap: 8px; }
.docs-block-title i { font-size: 18px; }
.docs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.doc-card { background: var(--bg-card); padding: 12px 14px; border: 1px solid var(--border); border-radius: 8px; display: flex; align-items: center; gap: 10px; cursor: pointer; min-height: 56px; }
.doc-icon { width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; color: var(--accent-red); flex-shrink: 0; }
.doc-icon i { font-size: 22px; }
.doc-info { flex: 1; min-width: 0; }
.doc-name { font-size: 12px; font-weight: 500; margin-bottom: 1px; }
.doc-meta { font-size: 11px; color: var(--ink-fade); }
.doc-card .download { font-size: 16px; color: var(--ink-soft); }
.related-section { border-top: 1px solid var(--border); padding-top: 40px; }
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 20px; }

/* Sticky mobile add-to-cart bar */
.mobile-buy-bar { display: none; position: fixed; bottom: 0; left: 0; right: 0; background: var(--bg); border-top: 1px solid var(--border); padding: 12px 16px calc(12px + var(--safe-bottom)); z-index: 90; box-shadow: 0 -4px 16px rgba(0,0,0,.06); align-items: center; gap: 10px; }
.mobile-buy-bar-info { flex: 1; min-width: 0; }
.mobile-buy-bar-price { font-size: 18px; font-weight: 500; color: var(--ink); }
.mobile-buy-bar-stock { font-size: 11px; }
.mobile-buy-bar .btn-primary { padding: 12px 20px; font-size: 14px; flex-shrink: 0; height: 46px; min-height: 46px; }

/* Brand page */
.brand-hero { background: var(--ink); color: var(--bg); padding: 56px 0; }
.brand-hero-inner { max-width: 1320px; margin: 0 auto; padding: 0 20px; }
.brand-hero-eyebrow { font-size: 11px; letter-spacing: .14em; color: rgba(255,255,255,.6); font-weight: 500; text-transform: uppercase; margin-bottom: 14px; }
.brand-hero h1 { font-size: 48px; font-weight: 500; letter-spacing: -.025em; line-height: 1.05; margin-bottom: 16px; }
.brand-hero p { font-size: 15px; color: rgba(255,255,255,.7); max-width: 640px; line-height: 1.6; margin-bottom: 24px; }
.brand-hero-stats { display: flex; gap: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.12); flex-wrap: wrap; }
.brand-hero-stat-num { font-size: 26px; font-weight: 500; margin-bottom: 3px; letter-spacing: -.01em; }
.brand-hero-stat-label { font-size: 11px; color: rgba(255,255,255,.5); letter-spacing: .05em; }
.brand-categories { padding: 40px 0 64px; }
.brand-cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 24px; }
.brand-cat-card { border: 1px solid var(--border); background: var(--bg-card); border-radius: 10px; padding: 20px; cursor: pointer; transition: border-color .15s, transform .15s; color: var(--ink); }
.brand-cat-card:hover, .brand-cat-card:active { border-color: var(--ink); transform: translateY(-2px); }
.brand-cat-card .num { font-size: 11px; color: var(--ink-fade); font-weight: 500; letter-spacing: .05em; margin-bottom: 8px; }
.brand-cat-card h3 { font-size: 16px; font-weight: 500; margin-bottom: 6px; }
.brand-cat-card p { font-size: 13px; color: var(--ink-soft); line-height: 1.5; margin-bottom: 12px; }
.brand-cat-card .count { font-size: 12px; display: flex; align-items: center; gap: 6px; font-weight: 500; }
.brand-cat-card .count i { font-size: 14px; }

/* Cart drawer */
.cart-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.4); z-index: 200; opacity: 0; pointer-events: none; transition: opacity .2s; }
.cart-overlay.open { opacity: 1; pointer-events: auto; }
.cart-drawer { position: fixed; top: 0; right: 0; bottom: 0; width: 440px; max-width: 100vw; background: var(--bg); z-index: 201; transform: translateX(100%); transition: transform .3s; display: flex; flex-direction: column; }
.cart-drawer.open { transform: translateX(0); }
.cart-header { padding: 18px 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.cart-header h3 { font-size: 17px; font-weight: 500; }
.cart-header h3 span { color: var(--ink-fade); font-weight: 400; font-size: 13px; margin-left: 6px; }
.cart-close { background: transparent; border: none; cursor: pointer; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; color: var(--ink); border-radius: 6px; }
.cart-close:hover { background: var(--bg-subtle); }
.cart-close i { font-size: 20px; }
.cart-items { flex: 1; overflow-y: auto; padding: 14px 20px; -webkit-overflow-scrolling: touch; }
.cart-item { display: grid; grid-template-columns: 56px 1fr auto; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.cart-item-img { background: var(--bg-subtle); width: 56px; height: 56px; border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--ink-fade); overflow: hidden; }
.cart-item-img i { font-size: 20px; opacity: .5; }
.cart-item-img img { width: 100%; height: 100%; object-fit: contain; padding: 6px; }
.cart-item-info { min-width: 0; }
.cart-item-sku { font-size: 10px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .05em; font-weight: 500; }
.cart-item-name { font-size: 13px; line-height: 1.35; margin: 2px 0 6px; }
.cart-item-qty { font-size: 12px; color: var(--ink-muted); display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.cart-item-qty button { background: transparent; border: 1px solid var(--border); border-radius: 4px; width: 26px; height: 26px; font-size: 14px; cursor: pointer; }
.cart-item-remove { background:transparent; border:none; font-size: 11px; color: var(--ink-soft); cursor: pointer; padding: 4px; margin-left: 4px; text-decoration: underline; }
.cart-item-price { font-size: 14px; font-weight: 500; }
.cart-footer { padding: 16px 20px calc(16px + var(--safe-bottom)); border-top: 1px solid var(--border); background: var(--bg-subtle); }
.cart-summary { display: flex; justify-content: space-between; padding: 3px 0; font-size: 13px; color: var(--ink-muted); }
.cart-summary.total { border-top: 1px solid var(--border-strong); margin-top: 8px; padding-top: 10px; font-size: 15px; color: var(--ink); font-weight: 500; }
.cart-summary.total .price { font-size: 20px; }
.cart-checkout-btn { width: 100%; padding: 14px; margin-top: 14px; font-size: 14px; }

/* Footer */
.footer { background: var(--ink); color: var(--bg); padding: 48px 0 24px; }
.footer-inner { max-width: 1320px; margin: 0 auto; padding: 0 20px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 32px; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-tagline { font-size: 14px; color: rgba(255,255,255,.7); line-height: 1.5; margin: 14px 0 18px; max-width: 280px; }
.footer-newsletter label { font-size: 11px; letter-spacing: .1em; color: rgba(255,255,255,.5); text-transform: uppercase; display: block; margin-bottom: 8px; font-weight: 500; }
.footer-newsletter-form { display: flex; border: 1px solid rgba(255,255,255,.15); border-radius: 6px; overflow: hidden; }
.footer-newsletter input { flex: 1; background: transparent; border: none; color: var(--bg); padding: 10px 12px; font-size: 13px; border-radius: 0; min-width: 0; }
.footer-newsletter input::placeholder { color: rgba(255,255,255,.4); }
.footer-newsletter button { background: var(--bg); color: var(--ink); border: none; padding: 0 16px; cursor: pointer; font-size: 13px; border-radius: 0; font-weight: 500; }
.footer-col h5 { font-size: 11px; letter-spacing: .1em; color: rgba(255,255,255,.5); text-transform: uppercase; margin-bottom: 14px; font-weight: 500; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; font-size: 13px; color: rgba(255,255,255,.7); }
.footer-col li a { cursor: pointer; }
.footer-col li a:hover { color: var(--bg); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: rgba(255,255,255,.5); flex-wrap: wrap; gap: 14px; }
.footer-bottom-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-bottom-links a { cursor: pointer; }

/* ============ BREAKPOINTS ============ */

/* Tablet (1024px and below) */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: 36px; }
  .hero-visual { max-width: 400px; margin: 0 auto; }
  .categories { grid-template-columns: repeat(3, 1fr); }
  .products-grid { grid-template-columns: repeat(3, 1fr); }
  .related-grid { grid-template-columns: repeat(3, 1fr); }
  .listing { grid-template-columns: 1fr; gap: 16px; }
  .filter-toggle-btn { display: inline-flex; }
  .filter-sidebar { position: fixed; top: 0; left: 0; bottom: 0; width: 320px; max-width: 85vw; background: var(--bg); z-index: 200; transform: translateX(-100%); transition: transform .3s; overflow-y: auto; padding: 0; }
  .filter-sidebar.open { transform: translateX(0); box-shadow: 4px 0 24px rgba(0,0,0,.1); }
  .filter-sidebar-header { display: flex; }
  .filter-sidebar .filter-group { margin: 0 20px 18px; padding-bottom: 18px; }
  .product-layout { grid-template-columns: 1fr; gap: 28px; }
  .product-gallery { position: static; }
  .trust-bar-inner { grid-template-columns: repeat(2, 1fr); }
  .brand-cat-grid { grid-template-columns: repeat(2, 1fr); }
  .docs-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-grid .footer-col:first-child { grid-column: 1 / -1; }
  .brand-hero h1 { font-size: 40px; }
}

/* Mobile (768px and below) */
@media (max-width: 768px) {
  .topbar-left { font-size: 11px; }
  .topbar-right { display: none; }
  .header-main { grid-template-columns: auto auto 1fr; gap: 8px; padding: 12px 16px; }
  .mobile-menu-btn { display: inline-flex; }
  .nav { display: none; }
  .logo { font-size: 16px; }
  .logo-mark { padding: 4px 8px; font-size: 13px; }
  .header-main .search-wrap { display: none; }
  .header-actions { justify-self: end; }
  .container { padding: 0 16px; }
  .hero { padding: 36px 0 48px; }
  .hero-inner { padding: 0 16px; gap: 28px; }
  .hero h1 { font-size: 30px; }
  .hero p { font-size: 14px; }
  .hero-cta { width: 100%; }
  .hero-cta .btn-primary, .hero-cta .btn-secondary { flex: 1; min-width: calc(50% - 5px); justify-content: center; }
  .hero-stats { gap: 24px; }
  .hero-visual { max-width: 100%; }
  .hero-visual-icon { font-size: 100px; }
  .brand-strip-inner { padding: 0 16px; }
  .brand-list { gap: 20px; }
  .brand-name { font-size: 14px; }
  .section { padding: 36px 0; }
  .section-title { font-size: 19px; }
  .categories { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .category-card { padding: 18px 14px; min-height: 110px; }
  .category-card i { font-size: 24px; }
  .category-card-title { font-size: 12px; }
  .products-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .product-card-body { padding: 10px 12px 12px; }
  .product-card-title { font-size: 12px; }
  .product-card-price { font-size: 14px; }
  .trust-bar { padding: 24px 0; }
  .trust-bar-inner { padding: 0 16px; grid-template-columns: 1fr 1fr; gap: 16px; }
  .trust-icon { width: 32px; height: 32px; }
  .trust-icon i { font-size: 20px; }
  .trust-content h4 { font-size: 12px; }
  .trust-content p { font-size: 10px; }
  .page-header { padding: 24px 0 20px; }
  .page-title { font-size: 22px; }
  .page-desc { font-size: 13px; }
  .listing { padding: 20px 0 56px; }
  .listing-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .listing-toolbar { flex-direction: column; align-items: stretch; gap: 10px; }
  .listing-toolbar > div { width: 100%; }
  .sort-dropdown { justify-content: space-between; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; }
  .product-detail { padding: 16px 0 100px; }
  .product-image-main { aspect-ratio: 1; }
  .product-image-main i { font-size: 90px; }
  .product-title-main { font-size: 22px; }
  .product-price-main { font-size: 26px; }
  .product-tabs { padding-top: 20px; margin-bottom: 28px; }
  .product-info .product-actions, .product-info .product-quote-link { display: none; }
  .mobile-buy-bar { display: flex; }
  .docs-grid { grid-template-columns: 1fr; }
  .brand-hero { padding: 40px 0; }
  .brand-hero h1 { font-size: 32px; }
  .brand-hero-stats { gap: 20px; padding-top: 18px; }
  .brand-hero-stat-num { font-size: 22px; }
  .brand-cat-grid { grid-template-columns: 1fr; }
  .footer { padding: 36px 0 20px; }
  .footer-inner { padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-grid .footer-col:first-child { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .cart-drawer { width: 100%; }
}

/* Small mobile (480px and below) */
@media (max-width: 480px) {
  .topbar-left { white-space: normal; line-height: 1.4; font-size: 10px; }
  .hero h1 { font-size: 26px; }
  .hero-cta .btn-primary, .hero-cta .btn-secondary { padding: 12px 16px; font-size: 13px; min-width: 100%; }
  .hero-stats { gap: 20px; flex-direction: column; }
  .brand-list { gap: 16px; }
  .brand-name { font-size: 13px; }
  .section { padding: 32px 0; }
  .section-title { font-size: 18px; }
  .section-header { gap: 8px; }
  .product-title-main { font-size: 20px; }
  .product-price-main { font-size: 24px; }
  .page-title { font-size: 20px; }
}

/* Toast notification */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(120%); background: var(--ink); color: var(--bg); padding: 14px 20px; border-radius: 8px; display: flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 500; z-index: 300; box-shadow: 0 10px 30px rgba(0,0,0,.2); opacity: 0; transition: transform .3s, opacity .3s; max-width: 90vw; }
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.toast i { color: #4ADE80; font-size: 22px; }
.toast .toast-action { margin-left: 8px; padding: 4px 10px; background: rgba(255,255,255,.15); border: none; color: var(--bg); border-radius: 4px; font-size: 12px; cursor: pointer; }
.toast .toast-action:hover { background: rgba(255,255,255,.25); }
@media (max-width: 768px) { .toast { bottom: calc(80px + var(--safe-bottom)); font-size: 13px; padding: 12px 16px; } .toast i { font-size: 18px; } }

/* Cart drawer empty state continue button */
.cart-empty-action { display: inline-block; margin-top: 16px; padding: 10px 20px; background: var(--ink); color: var(--bg); border-radius: 6px; font-size: 13px; font-weight: 500; }