:root {
  --bg: #f5f7fb;
  --bg-soft: #eef2f7;
  --surface: #ffffff;
  --border: #e5e7eb;
  --border-2: #d1d5db;
  --text: #0f172a;
  --text-soft: #334155;
  --muted: #64748b;
  --muted-2: #94a3b8;
  --brand: #2563eb;
  --brand-2: #1d4ed8;
  --danger: #dc2626;
  --danger-2: #b91c1c;
  --warning: #f59e0b;
  --gold: #fbbf24;
  --success: #16a34a;
  --shadow-sm: 0 1px 2px rgba(15,23,42,0.05);
  --shadow: 0 1px 3px rgba(15,23,42,0.07), 0 1px 2px rgba(15,23,42,0.04);
  --shadow-md: 0 4px 12px rgba(15,23,42,0.08);
  --shadow-lg: 0 12px 30px rgba(15,23,42,0.10);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --max: 1240px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 80px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); }

/* ============ TOP PROMO BAR ============ */
.promo-bar {
  background: linear-gradient(90deg, #2563eb, #1d4ed8);
  color: #fff;
  font-size: 13px; font-weight: 600;
  text-align: center; padding: 9px 14px;
}
.promo-bar strong { font-weight: 800; }

/* ============ NAV ============ */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.topbar .row { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; gap: 18px; }
.brand {
  font-weight: 900; letter-spacing: 0.2px; color: var(--text);
  font-size: 19px; display: inline-flex; align-items: center; gap: 8px;
}
.brand .logo-mark {
  background: var(--brand); color: #fff; padding: 6px 8px; border-radius: 8px;
  font-size: 14px; font-weight: 900;
}
.nav { display: flex; gap: 28px; }
.nav a { color: var(--text-soft); font-size: 15px; font-weight: 600; transition: color .15s; }
.nav a:hover { color: var(--brand); }
.nav-cta { display: flex; gap: 14px; align-items: center; }
.phone { color: var(--text-soft); font-size: 14px; font-weight: 700; display: flex; align-items: center; gap: 6px; }
.phone:hover { color: var(--brand); }
.cart-btn {
  position: relative; padding: 10px 16px; background: var(--bg-soft); color: var(--text);
  border-radius: var(--radius-sm); font-weight: 700; font-size: 14px;
  display: inline-flex; align-items: center; gap: 8px;
}
.cart-btn .pill {
  background: var(--danger); color: #fff;
  border-radius: 999px; padding: 1px 7px; font-size: 11px; font-weight: 800;
}
.cta-mini {
  background: var(--brand); color: #fff;
  padding: 10px 18px; border-radius: var(--radius-sm);
  font-weight: 800; font-size: 14px; transition: background .15s;
}
.cta-mini:hover { background: var(--brand-2); }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 22px; border-radius: var(--radius-sm);
  font-weight: 700; font-size: 15px;
  border: 0; cursor: pointer; font-family: inherit;
  transition: background .15s, transform .05s, box-shadow .15s, border-color .15s;
}
.btn-lg { padding: 16px 28px; font-size: 16px; }
.btn-xl { padding: 18px 32px; font-size: 17px; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-2); box-shadow: var(--shadow-md); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-2); box-shadow: var(--shadow-md); }
.btn-gradient {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #fff; box-shadow: 0 6px 16px rgba(220,38,38,0.30);
}
.btn-gradient:hover { box-shadow: 0 10px 24px rgba(220,38,38,0.40); transform: translateY(-1px); }
.btn-outline {
  background: #fff; color: var(--text); border: 1.5px solid var(--border-2);
}
.btn-outline:hover { border-color: var(--brand); color: var(--brand); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .65; cursor: wait; }
.btn-block { width: 100%; }

/* ============ SECTION HEADS ============ */
section { padding: 70px 0; }
section.gray { background: var(--bg-soft); }
section.white { background: var(--surface); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head .eyebrow {
  display: inline-block; color: var(--brand); font-size: 12px;
  letter-spacing: 2px; text-transform: uppercase; font-weight: 800; margin-bottom: 10px;
}
.section-head h2 { font-size: clamp(26px, 3vw, 36px); margin: 0 0 10px; font-weight: 800; line-height: 1.15; color: var(--text); }
.section-head p { color: var(--muted); margin: 0; max-width: 620px; margin-left: auto; margin-right: auto; font-size: 15px; }

/* ============ HOMEPAGE HERO ============ */
.home-hero {
  background: linear-gradient(180deg, #ffffff 0%, #f5f7fb 100%);
  padding: 60px 0 70px;
}
.home-hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.home-hero h1 {
  font-size: clamp(30px, 4.6vw, 52px);
  font-weight: 900; line-height: 1.06; margin: 14px 0 16px;
  color: var(--text); letter-spacing: -0.5px;
}
.home-hero h1 .accent { color: var(--brand); }
.home-hero p.lead { color: var(--muted); font-size: 18px; max-width: 540px; margin: 0 0 28px; }
.home-hero-cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.home-hero-trust { margin-top: 28px; display: flex; gap: 28px; flex-wrap: wrap; }
.home-hero-trust div { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-soft); font-weight: 600; }
.home-hero-trust div::before { content: "✓"; color: var(--success); font-weight: 900; }

.home-hero-img {
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg);
  aspect-ratio: 4/3; position: relative; background: #f0f4fa;
}
.home-hero-img img { width: 100%; height: 100%; object-fit: cover; }
.home-hero-img .save-badge {
  position: absolute; top: 18px; right: 18px;
  background: var(--danger); color: #fff; padding: 12px 16px;
  border-radius: 999px; font-weight: 900; font-size: 14px;
  box-shadow: 0 8px 20px rgba(220,38,38,0.35);
}

/* ============ CATEGORY / PRODUCT GRID (HOMEPAGE) ============ */
.product-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.product-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  transition: transform .2s, box-shadow .2s, border-color .2s;
  position: relative; cursor: pointer;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--brand); }
.product-card .p-img { aspect-ratio: 1/1; background: #f0f4fa; overflow: hidden; }
.product-card .p-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.product-card:hover .p-img img { transform: scale(1.05); }
.product-card .p-body { padding: 18px; }
.product-card .p-cap { color: var(--brand); font-size: 11px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; }
.product-card h3 { margin: 6px 0 8px; font-size: 16px; font-weight: 700; line-height: 1.3; color: var(--text); }
.product-card .p-price-row { display: flex; align-items: baseline; gap: 8px; margin-top: 10px; }
.product-card .p-price { font-size: 22px; font-weight: 900; color: var(--text); }
.product-card .p-was { color: var(--muted); font-size: 14px; text-decoration: line-through; }
.product-card .p-stars { color: #fbbf24; font-size: 13px; letter-spacing: 1px; margin-top: 4px; }
.product-card .p-badge {
  position: absolute; top: 12px; left: 12px;
  background: var(--gold); color: var(--text);
  font-size: 11px; font-weight: 900; letter-spacing: 0.5px;
  padding: 5px 10px; border-radius: 999px; box-shadow: var(--shadow-sm);
}
.product-card .p-badge.danger { background: var(--danger); color: #fff; }

/* ============ FEATURE STRIP (USP icons) ============ */
.usp-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
.usp {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; display: flex; gap: 14px; align-items: flex-start;
}
.usp .ic {
  width: 44px; height: 44px; border-radius: 10px;
  background: rgba(37,99,235,0.10); color: var(--brand);
  display: flex; align-items: center; justify-content: center; font-size: 20px;
  flex-shrink: 0;
}
.usp h4 { margin: 0 0 4px; font-size: 15px; font-weight: 700; }
.usp p { margin: 0; color: var(--muted); font-size: 13px; }

/* ============ HOMEPAGE REVIEW STRIP ============ */
.review-strip {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.review-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow);
}
.review-card .r-stars { color: #fbbf24; font-size: 15px; letter-spacing: 2px; }
.review-card p { color: var(--text-soft); margin: 10px 0 14px; font-size: 15px; }
.review-card .r-who { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); }
.review-card .r-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--brand); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 13px;
}

/* ============ PRODUCT PAGE — TWO-COLUMN ============ */
.breadcrumbs {
  padding: 16px 0; font-size: 13px; color: var(--muted);
  border-bottom: 1px solid var(--border); background: var(--surface);
}
.breadcrumbs a { color: var(--brand); }
.breadcrumbs span { margin: 0 8px; color: var(--muted-2); }

.product-layout {
  padding: 32px 0 64px;
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px;
  align-items: flex-start;
}
.product-gallery .main-img {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  aspect-ratio: 4/3; box-shadow: var(--shadow);
}
.product-gallery .main-img img { width: 100%; height: 100%; object-fit: cover; }
.product-gallery .thumbs {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 12px;
}
.product-gallery .thumbs .thumb {
  aspect-ratio: 1/1; border-radius: 8px; overflow: hidden;
  border: 2px solid var(--border); cursor: pointer; background: #f0f4fa;
  transition: border-color .15s;
}
.product-gallery .thumbs .thumb.active, .product-gallery .thumbs .thumb:hover { border-color: var(--brand); }
.product-gallery .thumbs .thumb img { width: 100%; height: 100%; object-fit: cover; }

.product-info h1 {
  font-size: 28px; font-weight: 800; line-height: 1.18; margin: 0 0 10px; color: var(--text);
}
.product-info .rating-row { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.product-info .rating-row .stars { color: #fbbf24; letter-spacing: 2px; font-size: 16px; }
.product-info .rating-row .count { color: var(--muted); font-size: 13px; }

.price-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; margin: 16px 0 20px;
  box-shadow: var(--shadow);
}
.price-card .row { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.price-card .price { font-size: 40px; font-weight: 900; color: var(--text); line-height: 1; }
.price-card .price-was { color: var(--muted); font-size: 18px; text-decoration: line-through; }
.price-card .save-tag {
  background: var(--gold); color: var(--text);
  padding: 5px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 900;
}
.price-card .stock { margin-top: 8px; color: var(--success); font-size: 13px; font-weight: 700; }
.price-card .stock::before { content: "●"; margin-right: 6px; }

/* Variant selector */
.variants { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 14px 0 6px; }
.variant {
  position: relative; cursor: pointer; padding: 12px 8px;
  background: var(--surface); border: 2px solid var(--border); border-radius: 10px;
  text-align: center; transition: all .15s;
}
.variant input { position: absolute; opacity: 0; pointer-events: none; }
.variant:hover { border-color: var(--brand); }
.variant.selected { border-color: var(--brand); background: rgba(37,99,235,0.06); }
.v-cap { font-weight: 800; font-size: 14px; color: var(--text); }
.v-price { font-size: 13px; color: var(--muted); margin-top: 2px; font-weight: 600; }
.variant.selected .v-price { color: var(--text); }
.v-badge {
  position: absolute; top: -10px; left: 50%; transform: translateX(-50%);
  background: var(--gold); color: var(--text);
  padding: 2px 8px; border-radius: 999px;
  font-size: 9px; font-weight: 900; letter-spacing: 1px; white-space: nowrap;
}

/* Quantity */
.qty-row { display: flex; align-items: center; gap: 14px; margin: 14px 0 18px; }
.qty-row label { color: var(--muted); font-size: 13px; font-weight: 700; }
.qty {
  display: inline-flex; border: 1px solid var(--border-2); border-radius: 8px; overflow: hidden;
}
.qty button {
  width: 36px; height: 36px; background: var(--surface); border: 0;
  font-size: 18px; font-weight: 700; cursor: pointer; color: var(--text);
}
.qty button:hover { background: var(--bg-soft); }
.qty input {
  width: 50px; height: 36px; text-align: center;
  border: 0; border-left: 1px solid var(--border); border-right: 1px solid var(--border);
  font: inherit; font-weight: 700;
}

/* Dual CTA */
.dual-cta { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 18px; }
.dual-cta .btn { padding: 16px; font-size: 15px; }

/* Info / shipping card */
.info-card {
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; margin-bottom: 16px;
}
.info-card .row { display: flex; gap: 12px; padding: 8px 0; border-bottom: 1px dashed var(--border); align-items: flex-start; }
.info-card .row:last-child { border-bottom: 0; }
.info-card .row .ic { font-size: 18px; flex-shrink: 0; }
.info-card .row b { display: block; color: var(--text); font-size: 14px; font-weight: 700; }
.info-card .row span { color: var(--muted); font-size: 13px; }

/* Install pricing card */
.install-card-pro {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff; padding: 22px; border-radius: var(--radius);
  margin: 18px 0;
}
.install-card-pro h4 { margin: 0 0 6px; font-size: 18px; font-weight: 800; }
.install-card-pro p { color: rgba(255,255,255,0.85); font-size: 13px; margin: 0 0 14px; }
.install-card-pro .price-line { display: flex; align-items: baseline; gap: 10px; margin-bottom: 14px; }
.install-card-pro .price-line .p { font-size: 30px; font-weight: 900; }
.install-card-pro .price-line .o { color: rgba(255,255,255,0.75); text-decoration: line-through; }
.install-card-pro .features { list-style: none; padding: 0; margin: 0; }
.install-card-pro .features li { padding: 4px 0; font-size: 13px; color: rgba(255,255,255,0.95); }
.install-card-pro .features li::before { content: "✓ "; color: var(--gold); font-weight: 900; }

/* ============ TRUST ROW (homepage + product) ============ */
.trust-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  text-align: center;
}
.trust {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 16px;
}
.trust .num { font-size: 30px; font-weight: 900; color: var(--brand); }
.trust .lbl { color: var(--muted); font-size: 13px; margin-top: 4px; font-weight: 600; }

/* ============ SHIPPING CALLOUT ============ */
.shipping-callout {
  background: linear-gradient(135deg, #16a34a, #15803d);
  color: #fff; padding: 32px; border-radius: var(--radius-lg);
  display: flex; gap: 22px; align-items: center; flex-wrap: wrap;
}
.shipping-callout .ic { font-size: 38px; }
.shipping-callout h3 { margin: 0 0 4px; font-size: 22px; font-weight: 800; }
.shipping-callout p { margin: 0; color: rgba(255,255,255,0.92); font-size: 14px; }
.shipping-features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 14px; }
.shipping-features div { background: rgba(255,255,255,0.12); padding: 10px 14px; border-radius: 8px; font-size: 13px; font-weight: 600; }

/* ============ SPECS ============ */
.specs-table {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow);
}
.specs-table .row {
  display: grid; grid-template-columns: 1fr 1fr;
  padding: 14px 22px; border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.specs-table .row:nth-child(odd) { background: var(--bg-soft); }
.specs-table .row:last-child { border-bottom: 0; }
.specs-table .row b { color: var(--text); font-weight: 700; }
.specs-table .row span { color: var(--muted); text-align: right; }

/* ============ REVIEWS BIG (product page) ============ */
.reviews-block { display: grid; grid-template-columns: 1fr; gap: 16px; max-width: 880px; margin: 0 auto; }
.review-big {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow);
}
.review-big .head { display: flex; gap: 14px; align-items: center; margin-bottom: 12px; }
.review-big .avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--brand); color: #fff; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.review-big .name { font-weight: 700; font-size: 15px; }
.review-big .meta { color: var(--success); font-size: 12px; font-weight: 700; }
.review-big .meta::before { content: "✓ "; }
.review-big .stars { color: #fbbf24; letter-spacing: 2px; }
.review-big p { color: var(--text-soft); margin: 0 0 12px; }
.review-big .photos { display: flex; gap: 8px; }
.review-big .photos .ph {
  width: 80px; height: 80px; border-radius: 8px; overflow: hidden;
  background: var(--bg-soft); border: 1px solid var(--border);
}
.review-big .photos .ph img { width: 100%; height: 100%; object-fit: cover; }

/* ============ FAQ ============ */
.faq { max-width: 880px; margin: 0 auto; }
.faq details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 22px; margin-bottom: 10px;
  box-shadow: var(--shadow-sm);
}
.faq details[open] { border-color: var(--brand); }
.faq summary {
  cursor: pointer; font-weight: 700; outline: none;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
  color: var(--text); font-size: 15px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "⌄"; color: var(--brand); font-size: 18px; transition: transform .15s; }
.faq details[open] summary::after { transform: rotate(180deg); }
.faq p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }

/* ============ FLASH SALE BANNER ============ */
.flash-sale {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 50%, #b91c1c 100%);
  color: #fff; text-align: center; padding: 56px 24px;
}
.flash-sale .icon-row { font-size: 32px; margin-bottom: 8px; }
.flash-sale h2 { font-size: 36px; font-weight: 900; margin: 0 0 8px; color: #fff; }
.flash-sale p { color: rgba(255,255,255,0.9); margin: 0 0 20px; }
.flash-sale .btn {
  background: #fff; color: var(--danger);
  font-weight: 900; padding: 16px 28px; font-size: 16px;
}
.flash-sale .btn:hover { background: #fff3f3; }
.flash-sale .small { font-size: 13px; color: rgba(255,255,255,0.85); margin-top: 14px; }

/* ============ CONTACT FORM ============ */
.contact-form-wrap {
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow);
  border-radius: var(--radius); padding: 30px; max-width: 640px; margin: 0 auto;
}
.contact-form-wrap form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.contact-form-wrap label { display: block; font-size: 13px; color: var(--text-soft); font-weight: 600; margin-bottom: 5px; }
.contact-form-wrap label .req { color: var(--danger); }
.contact-form-wrap input, .contact-form-wrap textarea {
  width: 100%; padding: 11px 13px;
  background: var(--bg-soft); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  font: inherit;
}
.contact-form-wrap input:focus, .contact-form-wrap textarea:focus { outline: none; border-color: var(--brand); background: #fff; }
.contact-form-wrap .full { grid-column: 1 / -1; }
.contact-form-wrap button { padding: 13px; }
.form-status { color: var(--success); font-size: 14px; min-height: 18px; }
.form-status.err { color: var(--danger); }

/* ============ FOOTER ============ */
footer {
  background: #0f172a; color: #cbd5e1;
  padding: 50px 0 22px; margin-top: 60px;
}
footer .foot-grid {
  display: grid; grid-template-columns: 1.7fr 1fr 1fr 1.2fr; gap: 30px; margin-bottom: 30px;
}
footer h5 { color: #fff; font-size: 13px; text-transform: uppercase; letter-spacing: 1px; margin: 0 0 14px; }
footer .brand { color: #fff; margin-bottom: 12px; }
footer .brand .logo-mark { background: var(--brand); }
footer a { display: block; color: #cbd5e1; padding: 4px 0; font-size: 14px; }
footer a:hover { color: #fff; }
footer p { font-size: 13px; color: #94a3b8; margin: 0 0 12px; }
footer .pay-logos { display: flex; gap: 6px; flex-wrap: wrap; }
footer .pay { background: #1e293b; padding: 4px 9px; border-radius: 5px; font-size: 11px; font-weight: 800; color: #cbd5e1; }
.foot-bottom {
  border-top: 1px solid #1e293b;
  display: flex; justify-content: space-between; padding-top: 20px;
  flex-wrap: wrap; gap: 8px; font-size: 13px; color: #94a3b8;
}

/* ============ MOBILE CART BAR ============ */
.mobile-cart-bar {
  display: none;
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--surface); border-top: 1px solid var(--border);
  padding: 12px 14px;
  z-index: 60;
  align-items: center; gap: 12px;
  box-shadow: 0 -6px 20px rgba(15,23,42,0.12);
}
.mc-info { flex: 1; min-width: 0; }
.mc-name { font-size: 11px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mc-price { font-size: 20px; font-weight: 900; color: var(--text); }
.mobile-cart-bar .btn { padding: 12px 18px; font-size: 14px; }

/* ============ RESPONSIVE ============ */
@media (max-width: 1000px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .usp-strip, .trust-row { grid-template-columns: repeat(2, 1fr); }
  .review-strip { grid-template-columns: 1fr; }
  .home-hero-grid, .product-layout { grid-template-columns: 1fr; gap: 32px; }
  .nav { display: none; }
  footer .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  section { padding: 50px 0; }
  .product-grid { grid-template-columns: 1fr; }
  .specs-table .row { grid-template-columns: 1fr; padding: 12px 18px; }
  .specs-table .row span { text-align: left; color: var(--muted); }
  .home-hero h1 { font-size: 32px; }
  .dual-cta { grid-template-columns: 1fr; }
  .contact-form-wrap form { grid-template-columns: 1fr; }
  .mobile-cart-bar { display: flex; }
  .nav-cta .phone { display: none; }
  footer .foot-grid { grid-template-columns: 1fr; }
  .product-gallery .thumbs { grid-template-columns: repeat(4, 1fr); }
}