/* ========== Quartz Cuvette Shop - Global Styles ========== */
:root {
  --primary: #0a1628;
  --primary-light: #1e3a5f;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --cyan: #06b6d4;
  --bg: #f8fafc;
  --white: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --success: #10b981;
  --danger: #ef4444;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { max-width:1200px; margin:0 auto; padding:0 24px; }

/* ---------- Navigation ---------- */
.navbar {
  position:fixed; top:0; left:0; right:0; z-index:1000;
  background:rgba(10,22,40,0.95); backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,0.05);
}
.nav-inner { display:flex; align-items:center; justify-content:space-between; height:72px; }
.logo { display:flex; align-items:center; text-decoration:none; }
.logo img { display:block; height:54px; width:auto; border-radius:4px; filter:drop-shadow(0 0 8px rgba(255,255,255,0.35)); transition:var(--transition); }
.logo img:hover { filter:drop-shadow(0 0 14px rgba(255,255,255,0.55)); }
.logo-icon { display:none; }
.logo-text { display:none; }
.nav-links { display:flex; gap:32px; list-style:none; }
.nav-links a { color:rgba(255,255,255,0.8); text-decoration:none; font-size:14px; font-weight:500; transition:var(--transition); position:relative; }
.nav-links a:hover, .nav-links a.active { color:#fff; }
.nav-links a.active::after { content:''; position:absolute; bottom:-6px; left:0; right:0; height:2px; background:var(--cyan); border-radius:2px; }
.nav-right { display:flex; align-items:center; gap:20px; }
.cart-btn { position:relative; color:#fff; text-decoration:none; font-size:20px; padding:4px; }
.cart-badge { position:absolute; top:-4px; right:-4px; background:var(--cyan); color:#fff; font-size:11px; font-weight:700; width:18px; height:18px; border-radius:50%; display:flex; align-items:center; justify-content:center; }
.mobile-menu-btn { display:none; background:none; border:none; color:#fff; font-size:24px; cursor:pointer; }

/* ---------- Buttons ---------- */
.btn { display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:12px 28px; border-radius:var(--radius); font-size:14px; font-weight:600; text-decoration:none; cursor:pointer; transition:var(--transition); border:none; }
.btn-primary { background:var(--accent); color:#fff; }
.btn-primary:hover { background:var(--accent-hover); transform:translateY(-2px); box-shadow:0 8px 24px rgba(37,99,235,0.3); }
.btn-outline { background:transparent; color:#fff; border:2px solid rgba(255,255,255,0.3); }
.btn-outline:hover { border-color:#fff; background:rgba(255,255,255,0.08); }
.btn-secondary { background:var(--white); color:var(--primary); border:1px solid var(--border); }
.btn-secondary:hover { background:var(--bg); }
.btn-danger { background:var(--danger); color:#fff; }
.btn-sm { padding:8px 16px; font-size:13px; }
.btn-lg { padding:14px 36px; font-size:15px; }

/* ---------- Hero ---------- */
.hero { position:relative; min-height:90vh; display:flex; align-items:center; background:linear-gradient(135deg, var(--primary) 0%, #0f2240 50%, var(--primary-light) 100%); overflow:hidden; padding-top:64px; }
.hero-bg { position:absolute; inset:0; opacity:0.08; background-image:radial-gradient(circle at 20% 50%, var(--accent) 0%, transparent 40%), radial-gradient(circle at 80% 80%, var(--cyan) 0%, transparent 40%); }
.hero-grid { display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; }
.hero-content { position:relative; z-index:1; }
.hero-tag { display:inline-flex; align-items:center; gap:8px; background:rgba(6,182,212,0.12); color:var(--cyan); padding:6px 16px; border-radius:20px; font-size:13px; font-weight:600; margin-bottom:20px; }
.hero-title { font-size:52px; font-weight:800; color:#fff; line-height:1.15; letter-spacing:-1px; margin-bottom:20px; }
.hero-title span { background:linear-gradient(90deg, var(--accent), var(--cyan)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.hero-desc { font-size:18px; color:rgba(255,255,255,0.7); max-width:480px; margin-bottom:32px; }
.hero-btns { display:flex; gap:16px; flex-wrap:wrap; }
.hero-image { position:relative; z-index:1; display:flex; justify-content:center; }
.hero-image img { max-width:100%; border-radius:var(--radius); box-shadow:var(--shadow-lg); transform:perspective(1000px) rotateY(-8deg); transition:var(--transition); }
.hero-image img:hover { transform:perspective(1000px) rotateY(0deg); }

/* ---------- Section ---------- */
.section { padding:80px 0; }
.section-header { text-align:center; max-width:600px; margin:0 auto 48px; }
.section-label { display:inline-block; background:var(--accent); color:#fff; padding:4px 14px; border-radius:20px; font-size:12px; font-weight:600; text-transform:uppercase; letter-spacing:1px; margin-bottom:12px; }
.section-title { font-size:36px; font-weight:800; color:var(--primary); margin-bottom:12px; }
.section-desc { font-size:16px; color:var(--text-light); }

/* ---------- Features ---------- */
.features-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.feature-card { background:var(--white); border:1px solid var(--border); border-radius:var(--radius); padding:32px 24px; text-align:center; transition:var(--transition); }
.feature-card:hover { transform:translateY(-4px); box-shadow:var(--shadow); border-color:transparent; }
.feature-icon { width:56px; height:56px; margin:0 auto 16px; background:linear-gradient(135deg,var(--accent),var(--cyan)); border-radius:14px; display:flex; align-items:center; justify-content:center; color:#fff; font-size:24px; }
.feature-card h3 { font-size:17px; margin-bottom:8px; color:var(--primary); }
.feature-card p { font-size:14px; color:var(--text-light); }

/* ---------- Product Card ---------- */
.products-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(270px,1fr)); gap:28px; }
.product-card { background:var(--white); border-radius:var(--radius); overflow:hidden; border:1px solid var(--border); transition:var(--transition); display:flex; flex-direction:column; }
.product-card:hover { transform:translateY(-6px); box-shadow:var(--shadow-lg); border-color:transparent; }
.product-img { position:relative; height:220px; overflow:hidden; background:#f1f5f9; display:flex; align-items:center; justify-content:center; }
.product-img img { max-width:100%; max-height:100%; object-fit:contain; padding:16px; transition:var(--transition); }
.product-card:hover .product-img img { transform:scale(1.06); }
.product-badge { position:absolute; top:12px; left:12px; background:var(--accent); color:#fff; font-size:11px; font-weight:700; padding:4px 10px; border-radius:20px; }
.product-info { padding:20px; flex:1; display:flex; flex-direction:column; }
.product-category { font-size:12px; color:var(--accent); font-weight:600; text-transform:uppercase; letter-spacing:0.5px; margin-bottom:4px; }
.product-name { font-size:16px; font-weight:700; color:var(--primary); margin-bottom:8px; line-height:1.35; }
.product-specs { font-size:13px; color:var(--text-light); margin-bottom:12px; }
.product-bottom { display:flex; align-items:center; justify-content:space-between; margin-top:auto; }
.product-price { font-size:20px; font-weight:800; color:var(--primary); }
.product-price .unit { font-size:13px; color:var(--text-light); font-weight:500; }

/* ---------- Category Filter ---------- */
.filter-bar { display:flex; gap:12px; flex-wrap:wrap; justify-content:center; margin-bottom:36px; }
.filter-btn { padding:8px 20px; border-radius:20px; border:1px solid var(--border); background:var(--white); color:var(--text); font-size:13px; font-weight:500; cursor:pointer; transition:var(--transition); }
.filter-btn:hover, .filter-btn.active { background:var(--accent); color:#fff; border-color:var(--accent); }

/* ---------- Product Detail ---------- */
.pd-layout { display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:start; }
.pd-gallery { background:var(--white); border-radius:var(--radius); border:1px solid var(--border); padding:32px; display:flex; align-items:center; justify-content:center; min-height:420px; }
.pd-gallery img { max-width:100%; max-height:400px; object-fit:contain; }
.pd-meta { margin-bottom:20px; }
.pd-category { font-size:13px; color:var(--accent); font-weight:600; text-transform:uppercase; }
.pd-name { font-size:32px; font-weight:800; color:var(--primary); margin:8px 0 16px; }
.pd-price { font-size:28px; font-weight:800; color:var(--accent); margin-bottom:20px; }
.pd-desc { color:var(--text-light); margin-bottom:24px; line-height:1.7; }
.pd-specs-table { width:100%; border-collapse:collapse; margin-bottom:24px; }
.pd-specs-table th, .pd-specs-table td { padding:10px 14px; text-align:left; border-bottom:1px solid var(--border); font-size:14px; }
.pd-specs-table th { color:var(--text-light); font-weight:500; width:40%; }
.pd-specs-table td { color:var(--text); font-weight:600; }
.pd-actions { display:flex; gap:12px; flex-wrap:wrap; }
.qty-input { display:flex; align-items:center; border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; }
.qty-input button { width:40px; height:44px; background:var(--white); border:none; font-size:18px; cursor:pointer; color:var(--text); transition:var(--transition); }
.qty-input button:hover { background:var(--bg); }
.qty-input input { width:50px; height:44px; border:none; text-align:center; font-size:15px; font-weight:600; color:var(--primary); }

/* ---------- Cart ---------- */
.cart-layout { display:grid; grid-template-columns:2fr 1fr; gap:32px; align-items:start; }
.cart-items { background:var(--white); border-radius:var(--radius); border:1px solid var(--border); overflow:hidden; }
.cart-header { display:grid; grid-template-columns:2fr 1fr 1fr 1fr auto; padding:16px 24px; background:var(--bg); font-size:13px; font-weight:600; color:var(--text-light); text-transform:uppercase; letter-spacing:0.5px; }
.cart-row { display:grid; grid-template-columns:2fr 1fr 1fr 1fr auto; padding:20px 24px; align-items:center; border-top:1px solid var(--border); }
.cart-product { display:flex; gap:16px; align-items:center; }
.cart-product img { width:64px; height:64px; object-fit:contain; background:#f1f5f9; border-radius:8px; padding:4px; }
.cart-product-name { font-weight:700; color:var(--primary); font-size:14px; }
.cart-product-spec { font-size:12px; color:var(--text-light); }
.cart-qty { display:flex; align-items:center; gap:8px; }
.cart-qty button { width:28px; height:28px; border:1px solid var(--border); background:var(--white); border-radius:6px; cursor:pointer; font-size:14px; }
.cart-qty span { min-width:24px; text-align:center; font-weight:600; }
.cart-price, .cart-subtotal { font-weight:700; color:var(--primary); }
.cart-remove { background:none; border:none; color:var(--danger); cursor:pointer; font-size:18px; padding:4px; transition:var(--transition); }
.cart-remove:hover { transform:scale(1.15); }
.cart-summary { background:var(--white); border-radius:var(--radius); border:1px solid var(--border); padding:28px; }
.cart-summary h3 { font-size:18px; margin-bottom:20px; color:var(--primary); }
.summary-row { display:flex; justify-content:space-between; padding:10px 0; font-size:14px; color:var(--text-light); border-bottom:1px solid var(--border); }
.summary-row.total { font-size:18px; font-weight:800; color:var(--primary); border-bottom:none; padding-top:16px; }
.empty-cart { text-align:center; padding:80px 24px; }
.empty-cart-icon { font-size:64px; margin-bottom:16px; }
.empty-cart h2 { font-size:24px; margin-bottom:8px; color:var(--primary); }
.empty-cart p { color:var(--text-light); margin-bottom:24px; }

/* ---------- Checkout ---------- */
.checkout-layout { display:grid; grid-template-columns:1.5fr 1fr; gap:32px; }
.checkout-form { background:var(--white); border-radius:var(--radius); border:1px solid var(--border); padding:32px; }
.checkout-form h3 { font-size:18px; margin-bottom:20px; color:var(--primary); display:flex; align-items:center; gap:10px; }
.form-group { margin-bottom:18px; }
.form-group label { display:block; font-size:13px; font-weight:600; color:var(--text); margin-bottom:6px; }
.form-group input, .form-group select, .form-group textarea { width:100%; padding:12px 14px; border:1px solid var(--border); border-radius:8px; font-size:14px; transition:var(--transition); font-family:inherit; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline:none; border-color:var(--accent); box-shadow:0 0 0 3px rgba(37,99,235,0.1); }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.payment-methods { display:flex; gap:12px; flex-wrap:wrap; margin-top:8px; }
.payment-method { display:flex; align-items:center; gap:8px; padding:12px 16px; border:2px solid var(--border); border-radius:8px; cursor:pointer; transition:var(--transition); font-size:14px; font-weight:500; }
.payment-method:hover, .payment-method.selected { border-color:var(--accent); background:rgba(37,99,235,0.04); }
.payment-method input { display:none; }

/* ---------- Footer ---------- */
.footer { background:var(--primary); color:rgba(255,255,255,0.7); padding:60px 0 24px; }
.footer-grid { display:grid; grid-template-columns:1.5fr 1fr 1fr 1fr; gap:40px; margin-bottom:40px; }
.footer-brand .logo { margin-bottom:12px; }
.footer-brand .logo img { display:block; height:46px; border-radius:4px; filter:drop-shadow(0 0 12px rgba(255,255,255,0.45)); transition:var(--transition); }
.footer-brand .logo img:hover { filter:drop-shadow(0 0 20px rgba(255,255,255,0.8)); }
.footer-brand p { font-size:14px; line-height:1.7; }
.footer-col h4 { color:#fff; font-size:15px; margin-bottom:16px; }
.footer-col ul { list-style:none; }
.footer-col li { margin-bottom:10px; }
.footer-col a { color:rgba(255,255,255,0.6); text-decoration:none; font-size:14px; transition:var(--transition); }
.footer-col a:hover { color:var(--cyan); }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.08); padding-top:24px; display:flex; justify-content:space-between; align-items:center; font-size:13px; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { padding:16px 0; font-size:13px; color:var(--text-light); }
.breadcrumb a { color:var(--text-light); text-decoration:none; }
.breadcrumb a:hover { color:var(--accent); }
.breadcrumb span { margin:0 8px; }

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns:1fr; text-align:center; gap:40px; }
  .hero-title { font-size:40px; }
  .hero-desc { margin-left:auto; margin-right:auto; }
  .hero-image img { transform:none; }
  .features-grid { grid-template-columns:repeat(2,1fr); }
  .cart-layout, .checkout-layout, .pd-layout { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:repeat(2,1fr); }
}

@media (max-width: 768px) {
  .nav-links { display:none; position:absolute; top:64px; left:0; right:0; background:var(--primary); flex-direction:column; padding:16px 24px; gap:0; border-bottom:1px solid rgba(255,255,255,0.08); }
  .nav-links.open { display:flex; }
  .nav-links li { border-bottom:1px solid rgba(255,255,255,0.05); }
  .nav-links a { display:block; padding:12px 0; }
  .mobile-menu-btn { display:block; }
  .hero-title { font-size:32px; }
  .section-title { font-size:28px; }
  .features-grid { grid-template-columns:1fr; }
  .cart-header, .cart-row { grid-template-columns:1fr; gap:8px; padding:16px; }
  .cart-header { display:none; }
  .cart-product { grid-column:1/-1; }
  .footer-grid { grid-template-columns:1fr; gap:32px; }
  .footer-bottom { flex-direction:column; gap:8px; text-align:center; }
}

/* ---------- Online Payment Buttons (Stripe / PayPal) ---------- */
.pd-buynow { display:flex; gap:10px; flex-wrap:wrap; margin:6px 0 4px; }
.pd-buynow .btn-buy-stripe, .pd-buynow .btn-buy-paypal { flex:1; min-width:190px; }
.btn-buy-stripe {
  display:inline-flex; align-items:center; justify-content:center; gap:6px;
  background:#635BFF; color:#fff; border:none; cursor:pointer;
  padding:13px 22px; border-radius:10px; font-size:15px; font-weight:700;
  transition:all .2s; text-decoration:none;
}
.btn-buy-stripe:hover { background:#5049e5; transform:translateY(-1px); box-shadow:0 6px 18px rgba(99,91,255,.35); }
.btn-buy-paypal {
  display:inline-flex; align-items:center; justify-content:center; gap:6px;
  background:#FFC439; color:#003087; border:none; cursor:pointer;
  padding:13px 22px; border-radius:10px; font-size:15px; font-weight:700;
  transition:all .2s; text-decoration:none;
}
.btn-buy-paypal:hover { background:#f2b92d; transform:translateY(-1px); box-shadow:0 6px 18px rgba(255,196,57,.4); }
.btn-buy-stripe.btn-sm, .btn-buy-paypal.btn-sm { padding:9px 16px; font-size:13px; border-radius:8px; }

/* Checkout per-item payment list */
.pay-item {
  display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap;
  border:1px solid var(--border); border-radius:12px; padding:14px 16px; margin-bottom:10px;
  background:#fff;
}
.pay-item-info { display:flex; flex-direction:column; gap:2px; font-size:14px; }
.pay-item-info b { color:var(--accent); }
.pay-item-btns { display:flex; gap:8px; flex-wrap:wrap; }
@media (max-width: 480px){ .pay-item { flex-direction:column; align-items:flex-start; } .pay-item-btns{ width:100%; } .pay-item-btns button{ flex:1; } }