:root{
  --accent:#2563eb;--accent-2:#60a5fa;--accent-soft:#eff6ff;--ink:#0b1220;--ink-2:#1e293b;
  --muted:#64748b;--line:#e5eaf1;--soft:#f7f9fc;--card:#fff;--danger:#dc2626;--success:#059669;
  --r-sm:12px;--r-md:18px;--r-lg:28px;--r-xl:38px;--shadow-sm:0 8px 24px rgba(15,23,42,.06);
  --shadow-md:0 20px 55px rgba(15,23,42,.11);--shadow-lg:0 38px 100px rgba(15,23,42,.16)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,"Be Vietnam Pro",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;overflow-x:hidden;-webkit-font-smoothing:antialiased}body.menu-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.container{width:min(1220px,calc(100% - 40px));margin:auto}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:16px;top:16px;z-index:1000;background:#fff;padding:12px;border-radius:10px}.announcement{background:#081426;color:#dbeafe;font-size:13px}.announcement .container{height:36px;display:flex;align-items:center;justify-content:center;gap:8px}.announcement-dot{width:7px;height:7px;background:#34d399;border-radius:50%;box-shadow:0 0 0 5px rgba(52,211,153,.12)}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.87);backdrop-filter:blur(18px) saturate(150%);border-bottom:1px solid rgba(226,232,240,.82)}.nav{height:74px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:11px;min-width:max-content}.brand-mark{width:38px;height:38px;border-radius:13px;background:linear-gradient(145deg,var(--accent),var(--accent-2));display:grid;place-items:center;color:#fff;font-weight:900;box-shadow:0 10px 26px color-mix(in srgb,var(--accent) 24%,transparent)}.brand-copy strong{display:block;font-size:17px;letter-spacing:-.03em}.brand-copy small{display:block;color:var(--muted);font-size:11px;margin-top:1px}.nav-links{display:flex;gap:26px;margin-left:18px}.nav-links a{font-size:14px;font-weight:750;color:#475569;transition:.2s}.nav-links a:hover{color:var(--accent)}.header-tools{margin-left:auto;display:flex;align-items:center;gap:10px}.icon-btn,.menu-btn{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:14px;display:grid;place-items:center;cursor:pointer;transition:.2s;position:relative}.icon-btn:hover,.menu-btn:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line));transform:translateY(-1px)}.cart-count{position:absolute;right:-5px;top:-5px;min-width:19px;height:19px;padding:0 5px;border-radius:999px;background:var(--danger);color:#fff;font-size:11px;display:grid;place-items:center;font-weight:800}.menu-btn{display:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:0 19px;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--ink-2);font-weight:800;cursor:pointer;transition:.22s;white-space:nowrap}.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}.btn-primary{background:linear-gradient(135deg,var(--accent),color-mix(in srgb,var(--accent) 72%,#7c3aed));border-color:transparent;color:#fff;box-shadow:0 14px 34px color-mix(in srgb,var(--accent) 26%,transparent)}.btn-dark{background:#0b1220;color:#fff;border-color:#0b1220}.btn-ghost{background:transparent}.btn-block{width:100%}.hero{position:relative;padding:84px 0 64px;overflow:hidden;background:radial-gradient(circle at 88% 15%,color-mix(in srgb,var(--accent) 17%,transparent),transparent 34%),linear-gradient(180deg,#fff 0%,#f7faff 100%)}.hero:before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;right:-180px;top:-180px;background:color-mix(in srgb,var(--accent) 7%,transparent);filter:blur(6px)}.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:70px;align-items:center}.kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:13px;font-weight:850;border:1px solid color-mix(in srgb,var(--accent) 18%,#fff)}.hero h1{font-size:clamp(50px,7vw,86px);line-height:.98;letter-spacing:-.065em;margin:24px 0 20px;max-width:760px}.hero h1 span{color:var(--accent)}.hero-copy{font-size:19px;line-height:1.72;color:var(--muted);max-width:650px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:29px}.trust-row{display:flex;gap:22px;flex-wrap:wrap;margin-top:31px;color:#475569;font-size:13px;font-weight:750}.trust-row span{display:flex;align-items:center;gap:7px}.trust-row i{width:20px;height:20px;border-radius:50%;background:#dcfce7;color:#047857;display:grid;place-items:center;font-style:normal;font-size:12px}.hero-visual{position:relative;min-height:490px}.visual-card{position:absolute;inset:16px 0 0 20px;border-radius:42px;background:linear-gradient(145deg,#0b1220,#13233d);box-shadow:var(--shadow-lg);overflow:hidden;transform:rotate(1.4deg)}.visual-screen{position:absolute;inset:26px 26px 92px;border-radius:25px;background:radial-gradient(circle at 75% 20%,#dbeafe,#fff 58%);display:grid;place-items:center;overflow:hidden}.laptop-illustration{width:74%;aspect-ratio:16/10;border:12px solid #111827;border-bottom-width:18px;border-radius:14px;background:linear-gradient(135deg,#dbeafe,#fff 55%,#bfdbfe);position:relative;box-shadow:0 24px 50px rgba(15,23,42,.22)}.laptop-illustration:after{content:"";position:absolute;left:-13%;right:-13%;height:14px;bottom:-31px;border-radius:0 0 22px 22px;background:linear-gradient(180deg,#94a3b8,#e2e8f0)}.visual-footer{position:absolute;bottom:25px;left:28px;right:28px;color:#fff;display:flex;justify-content:space-between;align-items:end}.visual-footer strong{font-size:20px}.visual-footer small{color:#a5b4fc}.floating-chip{position:absolute;padding:13px 15px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-md);font-weight:800;font-size:13px}.chip-a{right:-18px;top:82px}.chip-b{left:-8px;bottom:64px}.api-pill{margin-top:20px;display:inline-flex;align-items:center;gap:8px;color:#64748b;font-size:13px}.api-pill:before{content:"";width:8px;height:8px;border-radius:50%;background:#94a3b8}.api-pill[data-state=online]:before{background:#22c55e}.api-pill[data-state=error]:before{background:#ef4444}.section{padding:80px 0}.section-soft{background:var(--soft)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}.section-head h2{font-size:clamp(34px,4vw,50px);line-height:1.05;letter-spacing:-.05em;margin:13px 0 7px}.section-head p{margin:0;color:var(--muted)}.count-pill{padding:9px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--muted);font-size:13px;font-weight:800}.catalog-toolbar{display:grid;grid-template-columns:minmax(240px,2fr) repeat(3,minmax(150px,1fr));gap:12px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-sm);margin-bottom:28px}.search-wrap{position:relative}.search-wrap:before{content:"⌕";position:absolute;left:15px;top:50%;transform:translateY(-50%);color:#94a3b8;font-size:22px}.control{width:100%;height:48px;border:1px solid var(--line);border-radius:13px;background:#fff;padding:0 14px;color:#334155;outline:none}.search-wrap .control{padding-left:43px}.control:focus{border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 10%,transparent)}.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.product-card{background:#fff;border:1px solid var(--line);border-radius:24px;overflow:hidden;box-shadow:0 10px 32px rgba(15,23,42,.045);transition:.28s;position:relative}.product-card:hover{transform:translateY(-7px);box-shadow:var(--shadow-md);border-color:color-mix(in srgb,var(--accent) 24%,var(--line))}.product-badge{position:absolute;left:14px;top:14px;z-index:2;padding:7px 10px;border-radius:999px;background:rgba(11,18,32,.86);backdrop-filter:blur(10px);color:#fff;font-size:11px;font-weight:850}.product-image{display:grid;place-items:center;aspect-ratio:4/3;background:linear-gradient(145deg,#fbfdff,#eef4fb);overflow:hidden}.product-image img{width:100%;height:100%;object-fit:contain;padding:22px;transition:.35s}.product-card:hover .product-image img{transform:scale(1.045)}.product-image span{color:#94a3b8}.product-body{padding:19px}.product-meta{display:flex;justify-content:space-between;gap:10px;color:#64748b;font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.04em}.stock-ok{color:#047857}.stock-contact{color:#b45309}.product-card h3{font-size:21px;line-height:1.28;letter-spacing:-.035em;margin:11px 0 8px}.product-card h3 a:hover{color:var(--accent)}.product-card p{color:var(--muted);line-height:1.55;min-height:48px;margin:0}.product-price{display:flex;align-items:baseline;gap:8px;margin:17px 0}.product-price strong{font-size:24px;color:var(--danger);letter-spacing:-.035em}.old-price{text-decoration:line-through;color:#94a3b8;font-size:13px}.product-actions{display:grid;grid-template-columns:1fr 48px;gap:9px}.product-actions .btn{min-height:46px;padding:0 14px}.cart-icon-btn{border:0;border-radius:14px;background:#0b1220;color:#fff;font-size:18px;cursor:pointer;transition:.2s}.cart-icon-btn:hover{transform:translateY(-2px);background:var(--accent)}.benefit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.benefit-card{padding:28px;border:1px solid var(--line);border-radius:24px;background:#fff;box-shadow:var(--shadow-sm)}.benefit-icon{width:46px;height:46px;border-radius:15px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-size:21px;margin-bottom:18px}.benefit-card h3{font-size:21px;letter-spacing:-.03em;margin:0 0 8px}.benefit-card p{margin:0;color:var(--muted);line-height:1.65}.cta-band{display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:center;background:linear-gradient(135deg,#0b1220,#183253);color:#fff;padding:42px;border-radius:32px;overflow:hidden;position:relative}.cta-band:after{content:"";position:absolute;width:260px;height:260px;border-radius:50%;right:-80px;top:-100px;background:color-mix(in srgb,var(--accent) 55%,transparent);filter:blur(4px)}.cta-band h2{font-size:40px;letter-spacing:-.05em;margin:0 0 10px}.cta-band p{color:#cbd5e1;line-height:1.65;margin:0}.cta-actions{display:flex;justify-content:flex-end;gap:12px;position:relative;z-index:2}.site-footer{background:#07111f;color:#cbd5e1;padding:58px 0 26px}.footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr;gap:48px}.footer-title{color:#fff;font-size:19px;font-weight:900;margin-bottom:14px}.footer-copy{line-height:1.7;color:#94a3b8;max-width:430px}.footer-links{display:grid;gap:11px}.footer-links a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(148,163,184,.18);margin-top:38px;padding-top:20px;display:flex;justify-content:space-between;gap:20px;font-size:13px;color:#94a3b8}.floating-contact{position:fixed;right:18px;bottom:24px;z-index:45;display:flex;flex-direction:column;gap:10px}.floating-contact a,.backtop{width:50px;height:50px;border-radius:16px;display:grid;place-items:center;border:0;color:#fff;font-weight:900;box-shadow:0 13px 32px rgba(15,23,42,.2);cursor:pointer;transition:.2s}.floating-contact a:hover,.backtop:hover{transform:translateY(-3px)}.float-zalo{background:#0878f9}.float-phone{background:#16a34a}.float-fb{background:#2563eb}.backtop{background:#0b1220;display:none}.mobile-bottom{display:none}.mobile-drawer{position:fixed;inset:0;z-index:80;display:none}.mobile-drawer.open{display:block}.drawer-backdrop{position:absolute;inset:0;background:rgba(2,6,23,.52)}.drawer-panel{position:absolute;right:0;top:0;bottom:0;width:min(88vw,360px);background:#fff;padding:22px;box-shadow:-25px 0 70px rgba(15,23,42,.22)}.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.drawer-links{display:grid;gap:8px}.drawer-links a{padding:14px;border-radius:13px;font-weight:800}.drawer-links a:hover{background:var(--soft)}.skeleton{height:400px;border-radius:24px;background:linear-gradient(90deg,#eef2f7 25%,#f8fafc 37%,#eef2f7 63%);background-size:400% 100%;animation:shimmer 1.35s infinite}@keyframes shimmer{0%{background-position:100% 0}100%{background-position:0 0}}.empty-state,.product-loading{grid-column:1/-1;padding:52px;border:1px dashed #cbd5e1;border-radius:22px;text-align:center;background:#fff;color:#64748b}.empty-state.error{color:#b91c1c}.breadcrumbs{font-size:13px;color:#64748b;margin-bottom:25px;display:flex;gap:8px;flex-wrap:wrap}.detail-grid{display:grid;grid-template-columns:1.04fr .96fr;gap:56px;align-items:start}.gallery-main{aspect-ratio:4/3;border-radius:28px;background:linear-gradient(145deg,#fbfdff,#eef4fb);border:1px solid var(--line);display:grid;place-items:center;overflow:hidden;cursor:zoom-in}.gallery-main img{width:100%;height:100%;object-fit:contain;padding:24px}.gallery-thumbs{display:flex;gap:10px;margin-top:12px;overflow:auto;padding-bottom:4px}.gallery-thumb{width:84px;height:68px;border:2px solid transparent;border-radius:13px;background:#fff;padding:4px;cursor:pointer;flex:none}.gallery-thumb.active{border-color:var(--accent)}.gallery-thumb img{width:100%;height:100%;object-fit:contain}.detail-content{position:sticky;top:104px}.detail-content h1{font-size:clamp(38px,5vw,60px);line-height:1.04;letter-spacing:-.055em;margin:18px 0}.detail-price{font-size:36px;font-weight:950;color:var(--danger);margin:13px 0}.detail-old-price{color:#94a3b8;text-decoration:line-through;margin-left:10px;font-size:18px}.detail-summary{font-size:17px;line-height:1.75;color:var(--muted)}.detail-badges{display:flex;gap:9px;flex-wrap:wrap;margin:21px 0}.detail-badges span{padding:9px 11px;border-radius:999px;background:var(--soft);border:1px solid var(--line);font-size:13px;font-weight:750}.detail-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.detail-actions .btn:first-child{grid-column:1/-1}.ai-placeholder{margin-top:17px;padding:15px 16px;border-radius:16px;background:linear-gradient(135deg,#eef2ff,#f8fafc);color:#4338ca;font-weight:800}.detail-section{margin-top:48px;padding-top:37px;border-top:1px solid var(--line)}.detail-section h2{font-size:34px;letter-spacing:-.045em}.spec-list{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:20px;overflow:hidden}.spec-list div{display:grid;grid-template-columns:1fr 1.3fr;padding:15px 18px;border-bottom:1px solid var(--line)}.spec-list dt{font-weight:850}.spec-list dd{margin:0;color:#475569}.detail-description{line-height:1.85;color:#475569}.lightbox{position:fixed;inset:0;z-index:100;background:rgba(2,6,23,.9);display:none;place-items:center;padding:30px}.lightbox.open{display:grid}.lightbox img{max-width:95vw;max-height:90vh;object-fit:contain}.lightbox-close{position:absolute;right:24px;top:20px;background:#fff;border:0;border-radius:50%;width:44px;height:44px;font-size:24px;cursor:pointer}
/* Commerce compatibility */
.commerce-shell{max-width:1100px;margin:70px auto;padding:24px}.cart-row{display:grid;grid-template-columns:90px 1fr auto auto;gap:18px;align-items:center;padding:18px;border:1px solid var(--line);border-radius:18px;margin-bottom:12px;background:#fff}.cart-row img{width:90px;height:72px;object-fit:contain;border-radius:12px;background:var(--soft)}.cart-row div:nth-child(2){display:grid;gap:6px}.qty{display:flex;gap:10px;align-items:center}.qty button{width:34px;height:34px;border:1px solid var(--line);background:#fff;border-radius:10px}.cart-row>button{border:0;background:#fee2e2;color:#b91c1c;border-radius:10px;padding:9px 12px}.cart-summary{margin-top:24px;padding:24px;border:1px solid var(--line);border-radius:20px;background:#fff}.cart-summary>div,.checkout-total,.checkout-item{display:flex;justify-content:space-between;gap:20px;margin-bottom:16px}.primary-cta{display:inline-flex;justify-content:center;align-items:center;min-height:46px;padding:0 20px;background:#0b1220;color:#fff;border:0;border-radius:14px;text-decoration:none;font-weight:800;cursor:pointer}.checkout-shell{max-width:1140px;margin:54px auto;padding:24px;display:grid;grid-template-columns:1.35fr .75fr;gap:32px}.checkout-form{display:grid;gap:16px;padding:28px;border:1px solid var(--line);border-radius:24px;background:#fff}.checkout-form label{display:grid;gap:8px;font-weight:750}.checkout-form input,.checkout-form textarea,.checkout-form select{padding:13px 14px;border:1px solid var(--line);border-radius:12px;font:inherit}.checkout-form input:focus,.checkout-form textarea:focus,.checkout-form select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 10%,transparent)}.success-card{max-width:660px;margin:80px auto;padding:42px;text-align:center;border:1px solid var(--line);border-radius:28px;background:#fff;box-shadow:var(--shadow-md)}.success-icon{font-size:50px}.order-code{display:block;font-size:25px;margin:15px}.tracking-card{margin-top:24px;padding:20px;border-radius:16px;background:var(--soft)}
@media(max-width:980px){.nav-links{display:none}.menu-btn{display:grid}.header-tools>.btn{display:none}.hero-grid,.detail-grid{grid-template-columns:1fr}.hero-visual{min-height:420px;max-width:620px}.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.catalog-toolbar{grid-template-columns:1fr 1fr}.benefit-grid{grid-template-columns:1fr}.cta-band{grid-template-columns:1fr}.cta-actions{justify-content:flex-start}.detail-content{position:static}.footer-grid{grid-template-columns:1fr 1fr}.checkout-shell{grid-template-columns:1fr}}
@media(max-width:680px){.container{width:min(100% - 24px,1220px)}.announcement{display:none}.nav{height:66px}.brand-copy small{display:none}.header-tools{gap:7px}.icon-btn,.menu-btn{width:41px;height:41px}.hero{padding:52px 0 36px}.hero h1{font-size:48px}.hero-copy{font-size:16px}.hero-actions .btn{width:100%}.hero-visual{min-height:330px;margin-top:8px}.visual-card{inset:10px 0 0 0;border-radius:28px}.visual-screen{inset:18px 18px 72px}.floating-chip{display:none}.section{padding:54px 0}.section-head{align-items:start;flex-direction:column}.catalog-toolbar{grid-template-columns:1fr;padding:10px}.product-grid{grid-template-columns:1fr}.product-card{border-radius:20px}.benefit-grid{gap:14px}.cta-band{padding:28px;border-radius:24px}.cta-band h2{font-size:32px}.cta-actions{flex-direction:column}.cta-actions .btn{width:100%}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column}.floating-contact{display:none}.mobile-bottom{position:fixed;left:10px;right:10px;bottom:10px;z-index:60;height:64px;display:grid;grid-template-columns:repeat(5,1fr);background:rgba(255,255,255,.94);backdrop-filter:blur(18px);border:1px solid var(--line);border-radius:20px;box-shadow:0 18px 48px rgba(15,23,42,.18);padding:6px}.mobile-bottom a{display:grid;place-items:center;color:#475569;font-size:11px;font-weight:750}.mobile-bottom a span{font-size:20px;line-height:1}.mobile-bottom a.active{color:var(--accent)}body{padding-bottom:84px}.gallery-main{border-radius:20px}.detail-content h1{font-size:39px}.detail-actions{grid-template-columns:1fr}.detail-actions .btn:first-child{grid-column:auto}.spec-list{grid-template-columns:1fr}.spec-list div{grid-template-columns:1fr;gap:5px}.cart-row{grid-template-columns:68px 1fr}.cart-row img{width:68px;height:58px}.cart-row .qty,.cart-row>button{grid-column:2}.commerce-shell,.checkout-shell{padding:12px;margin-top:32px}}

/* Sprint 3.2.1 - Product purchase actions */
.purchase-panel{margin:24px 0 14px;padding:18px;border:1px solid var(--line);border-radius:20px;background:linear-gradient(145deg,#fff,#f8fafc);box-shadow:0 14px 34px rgba(15,23,42,.06)}
.quantity-control{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:14px}.quantity-label{font-size:14px;font-weight:850;color:#334155}.quantity-stock{font-size:13px;color:var(--muted);margin-left:auto}.quantity-stepper{display:grid;grid-template-columns:40px 56px 40px;align-items:center;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff}.quantity-stepper button{height:42px;border:0;background:#f8fafc;font-size:22px;cursor:pointer;color:#0f172a}.quantity-stepper button:hover{background:var(--accent-soft);color:var(--accent)}.quantity-stepper input{width:100%;height:42px;border:0;border-left:1px solid var(--line);border-right:1px solid var(--line);text-align:center;font:800 15px/1 inherit;appearance:textfield}.quantity-stepper input::-webkit-outer-spin-button,.quantity-stepper input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.quantity-stepper input:focus{outline:2px solid color-mix(in srgb,var(--accent) 28%,transparent);outline-offset:-2px}.buy-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.buy-actions .btn{min-height:54px;font-size:16px}.btn-icon{font-size:18px}.btn-cart{background:#fff;border:1.5px solid var(--accent);color:var(--accent)}.btn-cart:hover{background:var(--accent-soft);transform:translateY(-1px)}.btn-buy-now{background:linear-gradient(135deg,var(--accent),color-mix(in srgb,var(--accent) 72%,#111827));border-color:transparent;color:#fff;box-shadow:0 14px 30px color-mix(in srgb,var(--accent) 24%,transparent)}.btn-buy-now:hover{transform:translateY(-2px);box-shadow:0 18px 36px color-mix(in srgb,var(--accent) 30%,transparent)}.detail-contact-actions{margin-top:10px}.detail-contact-actions .btn:first-child{grid-column:1/-1}.btn-zalo{background:linear-gradient(135deg,#0f766e,#2563eb);border-color:transparent;color:#fff}.cart-toast{position:fixed;right:22px;top:92px;z-index:120;display:grid;grid-template-columns:34px 1fr auto;gap:12px;align-items:center;min-width:min(390px,calc(100vw - 28px));padding:14px 16px;border:1px solid #bbf7d0;border-radius:17px;background:rgba(255,255,255,.96);backdrop-filter:blur(16px);box-shadow:0 20px 60px rgba(15,23,42,.2);transform:translateY(-18px);opacity:0;pointer-events:none;transition:.24s}.cart-toast.show{transform:translateY(0);opacity:1;pointer-events:auto}.cart-toast>span{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#dcfce7;color:#15803d;font-weight:900}.cart-toast div{display:grid;gap:2px}.cart-toast small{color:#64748b;max-width:210px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.cart-toast a{font-weight:850;color:var(--accent)}
@media(max-width:680px){.purchase-panel{padding:14px;border-radius:17px}.quantity-control{gap:10px}.quantity-stock{width:100%;margin-left:0}.buy-actions{grid-template-columns:1fr}.buy-actions .btn{width:100%;min-height:52px}.cart-toast{left:14px;right:14px;top:auto;bottom:88px;min-width:0}.detail-contact-actions{grid-template-columns:1fr}}


/* Sprint 3.3 - global navigation and child-page UX */
.global-home-link{position:fixed;left:20px;bottom:22px;z-index:95;display:inline-flex;align-items:center;gap:9px;min-height:48px;padding:0 17px;border:1px solid rgba(15,23,42,.12);border-radius:999px;background:rgba(255,255,255,.94);color:#0f172a;text-decoration:none;font-size:14px;box-shadow:0 14px 38px rgba(15,23,42,.16);backdrop-filter:blur(18px);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.global-home-link span{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--accent,#2563eb);color:#fff;font-size:16px}.global-home-link:hover{transform:translateY(-2px);border-color:var(--accent,#2563eb);box-shadow:0 18px 44px rgba(15,23,42,.2)}
.breadcrumbs{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin:0 0 24px;color:#64748b;font-size:14px}.breadcrumbs a{color:#0f172a;text-decoration:none;font-weight:750}.breadcrumbs a:first-child{display:inline-flex;align-items:center;gap:7px;padding:8px 12px;border:1px solid #dbe3ef;border-radius:999px;background:#fff}.breadcrumbs a:first-child:before{content:'⌂';color:var(--accent,#2563eb)}.breadcrumbs a:hover{color:var(--accent,#2563eb)}
.commerce-shell,.checkout-shell,.success-card{width:min(1180px,calc(100% - 32px));margin:44px auto 100px}.commerce-shell>h1,.checkout-shell h1,.success-card h1{letter-spacing:-.045em;color:#0f172a}.commerce-shell{background:#fff;border:1px solid #e2e8f0;border-radius:24px;padding:clamp(22px,4vw,44px);box-shadow:0 18px 55px rgba(15,23,42,.08)}.cart-summary{margin-top:24px;border:1px solid #e2e8f0;border-radius:18px;padding:20px;background:#f8fafc}.primary-cta{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 22px;border:0;border-radius:14px;background:linear-gradient(135deg,var(--accent,#2563eb),#1557d6);color:#fff;text-decoration:none;font-weight:850;box-shadow:0 12px 28px rgba(37,99,235,.24);transition:.18s}.primary-cta:hover{transform:translateY(-1px);box-shadow:0 16px 34px rgba(37,99,235,.3)}.checkout-shell{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(320px,.75fr);gap:26px;align-items:start}.checkout-shell>section,.checkout-shell>aside{background:#fff;border:1px solid #e2e8f0;border-radius:24px;padding:clamp(22px,3vw,36px);box-shadow:0 16px 46px rgba(15,23,42,.07)}.checkout-form{display:grid;gap:16px}.checkout-form label{display:grid;gap:8px;font-weight:750;color:#172033}.checkout-form input,.checkout-form textarea,.checkout-form select{width:100%;border:1px solid #d8e0eb;border-radius:13px;padding:13px 14px;background:#fff;font:inherit;outline:none;transition:.18s}.checkout-form input:focus,.checkout-form textarea:focus,.checkout-form select:focus{border-color:var(--accent,#2563eb);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent,#2563eb) 12%,transparent)}.success-card{text-align:center;background:#fff;border:1px solid #e2e8f0;border-radius:26px;padding:clamp(30px,5vw,64px);box-shadow:0 22px 60px rgba(15,23,42,.1)}
@media(max-width:820px){.checkout-shell{grid-template-columns:1fr}.global-home-link{left:12px;bottom:84px;min-height:44px;padding:0 13px}.global-home-link strong{display:none}.global-home-link span{width:30px;height:30px}.commerce-shell,.checkout-shell,.success-card{width:min(100% - 20px,720px);margin-top:20px}.floating-contact{bottom:145px}}

/* ===================================================================
   Sprint 3.4 — Storefront Pro Visual Upgrade
   Typography, iconography, cart/checkout/tracking redesign.
   =================================================================== */
:root{--font-body:'Inter',ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;--font-display:'Plus Jakarta Sans','Inter',ui-sans-serif,system-ui,sans-serif}
body{font-family:var(--font-body)}
h1,h2,h3,.brand-copy strong,.hero h1,.section-head h2,.footer-title{font-family:var(--font-display)}
.hero h1{font-weight:800}

/* ---- Icon system ---- */
svg{display:block}
.menu-btn svg,.icon-btn svg{width:19px;height:19px}
.global-home-link span svg,.mobile-bottom span svg{width:16px;height:16px}
.kicker svg{width:12px;height:12px;color:var(--accent)}
.kicker{display:inline-flex;align-items:center;gap:6px}
.trust-row i{display:inline-flex;width:15px;height:15px;color:var(--success)}
.trust-row i svg{width:15px;height:15px}
.floating-chip svg{width:15px;height:15px}
.floating-chip{display:inline-flex;align-items:center;gap:7px}
.benefit-icon svg{width:22px;height:22px}
.float-phone svg,.backtop svg{width:18px;height:18px}
.lightbox-close svg,.drawer-head .icon-btn svg{width:17px;height:17px}
.primary-cta svg,.ghost-cta svg,.back-link svg{width:16px;height:16px;flex:none}
.primary-cta,.ghost-cta,.back-link{display:inline-flex;align-items:center;justify-content:center;gap:9px}
.success-icon svg{width:34px;height:34px}
.trust-mini svg{width:14px;height:14px;color:var(--success)}
.trust-mini span{display:inline-flex;align-items:center;gap:6px}

/* ---- Commerce page shared layout ---- */
.commerce-page{padding-top:28px}
.page-heading-row{margin:6px 0 22px}
.page-heading-row h1{font-size:clamp(24px,3vw,32px);letter-spacing:-.03em;margin:0 0 6px}
.page-heading-row p{color:var(--muted);margin:0}
.breadcrumbs{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;margin-bottom:18px}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs a:hover{color:var(--accent)}

/* ---- Cart ---- */
.commerce-shell{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,.85fr);gap:26px;align-items:start;margin:0 0 60px}
.cart-list{display:grid;gap:14px}
.cart-list:empty::after,.cart-list p{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:60px 20px;text-align:center;background:var(--soft);border:1px dashed var(--line);border-radius:var(--r-lg);color:var(--muted);font-weight:600}
.cart-row{display:grid;grid-template-columns:64px 1fr auto auto;gap:14px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:14px;box-shadow:var(--shadow-sm)}
.cart-row img{width:64px;height:52px;border-radius:10px;object-fit:cover;background:var(--soft)}
.cart-row .qty{display:flex;align-items:center;gap:10px;background:var(--soft);border-radius:999px;padding:4px 8px}
.cart-row .qty button{width:26px;height:26px;border-radius:50%;border:0;background:#fff;box-shadow:var(--shadow-sm);cursor:pointer;font-weight:800}
.cart-row [data-remove]{border:0;background:transparent;color:var(--danger);font-weight:700;cursor:pointer}
.cart-summary{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;position:sticky;top:20px}
.cart-summary h2{font-size:16px;margin:0 0 16px}
.summary-row{display:flex;justify-content:space-between;align-items:center;padding:9px 0;font-size:14px}
.summary-row.muted{color:var(--muted);border-top:1px dashed var(--line);border-bottom:1px dashed var(--line)}
.cart-summary .primary-cta{width:100%;margin-top:14px}
.cart-summary .ghost-cta{width:100%;margin-top:10px}
.ghost-cta{min-height:46px;padding:0 18px;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:700}
.ghost-cta:hover{border-color:var(--accent);color:var(--accent)}
.trust-mini{display:flex;flex-direction:column;gap:8px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:12.5px;color:var(--muted)}

/* ---- Checkout ---- */
.checkout-steps{display:flex;align-items:center;gap:10px;margin:0 0 26px}
.checkout-steps .step{display:flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;color:var(--muted)}
.checkout-steps .step svg{width:15px;height:15px}
.checkout-steps .step.active{color:var(--accent)}
.checkout-steps .step.done{color:var(--success)}
.checkout-steps .step-line{flex:1;max-width:56px;height:2px;background:var(--line);border-radius:2px}
.checkout-shell{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(300px,.85fr);gap:26px;align-items:start;margin-bottom:70px}
.checkout-form-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(20px,3vw,32px)}
.back-link{color:var(--muted);font-size:13px;font-weight:600;margin-bottom:14px}
.back-link:hover{color:var(--accent)}
.checkout-form-card h1{font-size:22px;margin:0 0 20px}
.checkout-form{display:grid;gap:16px}
.checkout-form .form-grid.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.checkout-form label{display:grid;gap:7px;font-size:13px;font-weight:700;color:var(--ink-2)}
.checkout-form input,.checkout-form select,.checkout-form textarea{min-height:48px;border:1px solid var(--line);border-radius:13px;padding:0 14px;font:inherit;outline:none;transition:.16s}
.checkout-form textarea{padding:12px 14px;min-height:88px;resize:vertical}
.checkout-form input:focus,.checkout-form select:focus,.checkout-form textarea:focus{border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 14%,transparent)}
.checkout-form .primary-cta{margin-top:6px;min-height:52px}
.form-message{color:var(--danger);font-size:13px;min-height:18px;margin:0}
.order-summary-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;position:sticky;top:20px}
.order-summary-card h2{font-size:16px;margin:0 0 14px}
.checkout-items{display:grid;gap:10px;max-height:260px;overflow:auto}
.checkout-item{display:flex;justify-content:space-between;gap:10px;font-size:13.5px;padding-bottom:10px;border-bottom:1px dashed var(--line)}
.checkout-total{display:flex;justify-content:space-between;align-items:center;padding-top:16px;margin-top:10px;border-top:1px solid var(--line);font-weight:800}
.checkout-total strong{color:var(--accent);font-size:18px}

/* ---- Success / Tracking ---- */
.success-card{max-width:640px;margin:56px auto 90px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);padding:clamp(32px,5vw,56px);box-shadow:var(--shadow-md)}
.success-icon{width:74px;height:74px;margin:0 auto 20px;border-radius:50%;background:linear-gradient(150deg,var(--success),#0d9488);color:#fff;display:grid;place-items:center;box-shadow:0 16px 34px rgba(5,150,105,.28)}
.success-icon.subtle{background:linear-gradient(150deg,var(--accent),var(--accent-2));box-shadow:0 16px 34px color-mix(in srgb,var(--accent) 30%,transparent)}
.success-card h1{font-size:26px;margin:0 0 10px}
.success-card p{color:var(--muted);margin:0 0 6px}
.order-code{display:inline-block;margin:14px 0;padding:12px 26px;background:var(--soft);border:1px dashed var(--line);border-radius:14px;font-size:20px;letter-spacing:.06em;font-weight:800;color:var(--accent)}
.success-note{max-width:420px;margin:10px auto 26px;font-size:13.5px;line-height:1.6}
.success-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.tracking-card-shell{text-align:center}
.tracking-form{max-width:420px;margin:24px auto 0;text-align:left}
#tracking-result{margin-top:22px}
.tracking-card{background:var(--soft);border:1px solid var(--line);border-radius:var(--r-md);padding:20px;text-align:left;display:grid;gap:6px}
.tracking-card strong{color:var(--accent);font-size:16px}

@media(max-width:860px){
  .commerce-shell,.checkout-shell{grid-template-columns:1fr}
  .cart-row{grid-template-columns:56px 1fr;grid-template-areas:"img name" "img qty";row-gap:8px}
  .cart-row img{grid-area:img}
  .checkout-form .form-grid.two{grid-template-columns:1fr}
  .cart-summary,.order-summary-card{position:static}
}