/* FUOCO — giao diện chung */
:root{
  --ink:#111111;
  --muted:#6B6B6B;
  --line:#E6E6E6;
  --soft:#F5F5F5;
  --bg:#FFFFFF;
  --sale:#B3261E;
  --ph:#ECEBE9;
  --max:1400px;
  --font:'Montserrat','Helvetica Neue',Arial,sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px;line-height:1.6}
a{color:inherit;text-decoration:none}
a:hover{color:var(--muted)}
img{max-width:100%;display:block}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
.container{max-width:var(--max);margin:0 auto;padding:0 32px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.upper{text-transform:uppercase;letter-spacing:.16em}
.eyebrow{font-size:12px;letter-spacing:.3em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}
.section-title{margin:0;font-weight:600;font-size:30px;letter-spacing:.16em;text-transform:uppercase}
.center{text-align:center}

/* Nút */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:50px;padding:0 40px;border:1px solid var(--ink);background:var(--ink);color:#fff;font-size:12px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;transition:opacity .15s}
.btn:hover{opacity:.85;color:#fff}
.btn-outline{background:transparent;color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:#fff;opacity:1}
.btn-light{background:#fff;color:var(--ink);border-color:#fff}
.btn-light:hover{color:var(--ink)}
.btn-ghost-light{background:transparent;color:#fff;border-color:#fff}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.link-line{font-size:12px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;border-bottom:1px solid currentColor;padding-bottom:4px}

/* Thanh thông báo */
.topbar{background:var(--ink);color:#fff;font-size:12px;letter-spacing:.08em;padding:10px 16px;text-align:center;text-transform:uppercase}

/* Header */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.header-row{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:76px}
.header-left,.header-right{display:flex;align-items:center;gap:4px}
.header-right{justify-content:flex-end}
.logo{font-weight:700;font-size:28px;letter-spacing:.42em;padding-left:.42em}
.icon-btn{width:44px;height:44px;border:0;background:transparent;display:inline-flex;align-items:center;justify-content:center;color:var(--ink);position:relative}
.icon-btn svg{width:20px;height:20px}
.cart-count{position:absolute;top:4px;right:2px;min-width:18px;height:18px;padding:0 4px;border-radius:999px;background:var(--ink);color:#fff;font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center}
.hotline{font-size:12px;letter-spacing:.06em;color:var(--muted)}
.main-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 40px;padding:0 16px 18px;font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase}
.main-nav a.active{border-bottom:2px solid var(--ink)}
.main-nav .sale{color:var(--sale)}
.menu-toggle{display:none}
.search-bar{display:none;border-top:1px solid var(--line);padding:12px 0}
.search-bar.open{display:block}
.search-bar form{display:flex;gap:8px}
.search-bar input{flex:1;height:44px;border:1px solid var(--line);padding:0 14px}

/* Banner */
.hero{position:relative;height:680px;background:#1E1E1E center/cover no-repeat;color:#fff;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.45),rgba(0,0,0,0) 60%)}
.hero-inner{position:absolute;left:0;right:0;bottom:0;z-index:1;padding-bottom:72px;display:flex;flex-direction:column;gap:20px}
.hero h1{margin:0;font-weight:300;font-size:clamp(44px,6vw,88px);line-height:1;letter-spacing:.02em;text-transform:uppercase}
.hero h1 strong{font-weight:700}
.hero p{margin:0;max-width:440px;color:#DADADA}
.hero .eyebrow{color:#CFCFCF}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}

/* Tabs */
.tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 36px;margin:0 0 40px;border-bottom:1px solid var(--line)}
.tab{height:48px;padding:0 2px;border:0;border-bottom:2px solid transparent;margin-bottom:-1px;background:transparent;font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.tab.active{color:var(--ink);border-bottom-color:var(--ink)}

/* Lưới sản phẩm */
.product-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:40px 24px}
.card{display:flex;flex-direction:column;gap:14px}
.card-media{position:relative;display:block;aspect-ratio:4/5;background:var(--ph);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .card-media img{transform:scale(1.03)}
.badge{position:absolute;top:12px;left:12px;padding:5px 10px;background:var(--ink);color:#fff;font-size:10px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;z-index:1}
.badge.hot{background:var(--sale)}
.ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:#9A9A9A;text-align:center;padding:12px}
.card-name{font-size:14px;font-weight:500;line-height:1.5}
.card-sub{font-size:12px;color:var(--muted);letter-spacing:.04em}
.price{display:flex;align-items:baseline;flex-wrap:wrap;gap:10px}
.price .now{font-weight:700;color:var(--ink)}
.price .now.on-sale{color:var(--sale)}
.price .old{font-size:13px;color:#8A8A8A;text-decoration:line-through}
.card-swatches{display:flex;gap:6px}
.dot{width:14px;height:14px;border-radius:50%;box-shadow:inset 0 0 0 1px rgba(0,0,0,.2)}

/* Khối bộ sưu tập */
.collections{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px}
.collection{position:relative;height:760px;background:#D9D6D1 center/cover no-repeat;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:14px;padding:56px 24px;color:var(--ink)}
.collection.dark{background-color:#2A2A2A;color:#fff}
.collection h3{margin:0;font-weight:600;font-size:34px;letter-spacing:.14em;text-transform:uppercase;text-align:center}
.collection:hover{color:inherit}

/* Cam kết */
.perks{border-bottom:1px solid var(--line)}
.perks-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}
.perk{padding:44px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:10px}
.perk svg{width:28px;height:28px}
.perk b{font-size:12px;letter-spacing:.16em;text-transform:uppercase}
.perk span{font-size:13px;color:var(--muted)}

.story{max-width:820px;margin:0 auto;padding:112px 32px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:22px}
.story h2{margin:0;font-weight:300;font-size:clamp(28px,3.4vw,42px);line-height:1.35}
.story h2 strong{font-weight:600}

/* Footer */
.site-footer{background:var(--ink);color:#fff}
.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:40px;padding:72px 0 40px}
.footer-grid h4{margin:0 0 14px;font-size:12px;letter-spacing:.16em;text-transform:uppercase}
.footer-grid p,.footer-grid a{font-size:13px;color:#BDBDBD}
.footer-grid a:hover{color:#fff}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-logo{font-weight:700;font-size:22px;letter-spacing:.42em;display:block;margin-bottom:14px}
.newsletter{display:flex;border-bottom:1px solid #5A5A5A}
.newsletter input{flex:1;min-width:0;height:44px;border:0;background:transparent;color:#fff;outline:none}
.newsletter button{width:44px;height:44px;border:0;background:transparent;color:#fff}
.footer-bottom{border-top:1px solid #2E2E2E;padding:24px 0;font-size:12px;color:#9A9A9A;letter-spacing:.06em;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}

/* Nút liên hệ nổi */
.float-contact{position:fixed;right:20px;bottom:20px;display:flex;flex-direction:column;gap:12px;z-index:60}
.float-contact a{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:12px;font-weight:800;box-shadow:0 4px 14px rgba(0,0,0,.18)}
.float-contact .zalo{background:#0068FF}
.float-contact .call{background:#1F8A4C}
.float-contact a:hover{color:#fff;opacity:.9}

/* Đường dẫn */
.breadcrumb{display:flex;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--muted);padding:20px 0}
.breadcrumb span:last-child{color:var(--ink)}

/* Trang danh mục */
.page-head{padding:56px 0 32px;text-align:center}
.toolbar{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:32px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{height:40px;padding:0 18px;border:1px solid var(--line);background:#fff;font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase}
.chip.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.select{height:40px;border:1px solid var(--line);padding:0 12px;background:#fff}
.empty{padding:80px 0;text-align:center;color:var(--muted)}

/* Trang chi tiết */
.pdp{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:56px;padding-bottom:40px}
.gallery{display:flex;gap:16px}
.thumbs{display:flex;flex-direction:column;gap:10px;flex:0 0 88px}
.thumb{width:88px;aspect-ratio:4/5;padding:0;border:1px solid transparent;background:var(--ph);position:relative;overflow:hidden;font-size:11px;color:#8A8A8A}
.thumb img{width:100%;height:100%;object-fit:cover}
.thumb.active{border-color:var(--ink)}
.main-img{position:relative;flex:1;min-width:0;aspect-ratio:4/5;background:var(--ph);overflow:hidden}
.main-img img{width:100%;height:100%;object-fit:cover}
.nav-arrow{position:absolute;top:50%;margin-top:-24px;width:44px;height:48px;border:0;background:rgba(255,255,255,.85);display:flex;align-items:center;justify-content:center;z-index:2}
.nav-arrow.prev{left:0}.nav-arrow.next{right:0}
.pdp-info{display:flex;flex-direction:column;gap:24px}
.pdp-info h1{margin:0;font-weight:600;font-size:24px;line-height:1.4;letter-spacing:.04em;text-transform:uppercase}
.pdp-meta{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:13px;color:var(--muted);margin-top:10px}
.price-box{display:flex;align-items:center;flex-wrap:wrap;gap:14px;padding:16px 20px;background:var(--soft)}
.price-box .now{font-size:26px;font-weight:700}
.price-box .now.on-sale{color:var(--sale)}
.price-box .old{color:#8A8A8A;text-decoration:line-through}
.off{padding:4px 8px;background:var(--ink);color:#fff;font-size:12px;font-weight:700}
.opt-label{margin:0 0 12px;font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase}
.opt-label span{font-weight:400;letter-spacing:0;text-transform:none}
.color-opts{display:flex;flex-wrap:wrap;gap:10px}
.color-opt{width:64px;height:80px;padding:4px;border:1px solid #D6D6D6;background:#fff}
.color-opt.active{border-color:var(--ink)}
.color-opt span{display:block;width:100%;height:100%;box-shadow:inset 0 0 0 1px rgba(0,0,0,.08)}
.size-row{display:flex;justify-content:space-between;align-items:center}
.size-opts{display:flex;flex-wrap:wrap;gap:8px}
.size-opt{min-width:52px;height:48px;padding:0 12px;border:1px solid #D6D6D6;background:#fff;font-weight:600}
.size-opt.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.text-btn{border:0;background:transparent;text-decoration:underline;font-size:13px;height:44px}
.error{margin:8px 0 0;font-size:13px;color:var(--sale)}
.size-guide{margin-top:12px;border:1px solid var(--line);overflow-x:auto}
.size-guide table{width:100%;border-collapse:collapse;font-size:13px;text-align:center}
.size-guide th{background:var(--soft);font-weight:600;padding:10px}
.size-guide td{padding:10px;border-top:1px solid #EEE;color:var(--muted)}
.qty{display:inline-flex;align-items:center;border:1px solid #D6D6D6}
.qty button{width:44px;height:44px;border:0;background:transparent;font-size:18px}
.qty input{width:44px;text-align:center;border:0;font-weight:600;-moz-appearance:textfield}
.qty input::-webkit-outer-spin-button,.qty input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.qty-row{display:flex;align-items:center;gap:16px}
.qty-row p{margin:0}
.info-rows{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.info-rows div{display:flex;align-items:center;gap:12px;padding:14px 0;font-size:14px}
.info-rows div+div{border-top:1px solid #EEE}
.info-rows svg{width:22px;height:22px;flex:none}
.buy-btns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.buy-btns .btn{height:56px;padding:0 12px}
.mini-perks{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;font-size:12px;color:#4A4A4A;text-align:center}
.mini-perks div{display:flex;flex-direction:column;align-items:center;gap:8px;padding:14px 6px;background:#F7F7F7}
.mini-perks svg{width:22px;height:22px}
.detail-tabs{max-width:1000px;margin:0 auto;padding:72px 0 0}
.tab-panel{padding-top:32px;line-height:1.8;color:#333}
.tab-panel[hidden]{display:none}

/* Giỏ hàng */
.cart-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:48px;padding:16px 0 96px;align-items:start}
.cart-item{display:grid;grid-template-columns:110px minmax(0,1fr) auto;gap:20px;padding:20px 0;border-bottom:1px solid var(--line)}
.cart-item:first-child{border-top:1px solid var(--line)}
.cart-thumb{position:relative;width:110px;aspect-ratio:4/5;background:var(--ph);overflow:hidden}
.cart-thumb img{width:100%;height:100%;object-fit:cover}
.cart-item h3{margin:0;font-size:14px;font-weight:600}
.cart-item .variant{font-size:13px;color:var(--muted);margin:4px 0 12px}
.cart-item .right{display:flex;flex-direction:column;align-items:flex-end;justify-content:space-between}
.remove{border:0;background:transparent;font-size:12px;color:var(--muted);text-decoration:underline;height:32px}
.summary{background:var(--soft);padding:28px;position:sticky;top:180px}
.summary h2{margin:0 0 20px;font-size:14px;letter-spacing:.16em;text-transform:uppercase}
.sum-row{display:flex;justify-content:space-between;padding:8px 0;font-size:14px}
.sum-total{border-top:1px solid #DADADA;margin-top:8px;padding-top:16px;font-size:16px;font-weight:700}
.freeship-bar{margin:12px 0 20px;font-size:13px}
.bar{height:4px;background:#DADADA;margin-top:8px}
.bar span{display:block;height:100%;background:var(--ink)}

/* Thanh toán */
.checkout-layout{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:48px;padding:16px 0 96px;align-items:start}
.form-section{margin-bottom:36px}
.form-section h2{margin:0 0 18px;font-size:14px;letter-spacing:.16em;text-transform:uppercase}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.field label{font-size:13px;font-weight:600}
.field input,.field textarea,.field select{height:48px;border:1px solid #D6D6D6;padding:0 14px;background:#fff;border-radius:0}
.field textarea{height:96px;padding:12px 14px;resize:vertical}
.field input:focus,.field textarea:focus,.field select:focus{outline:2px solid var(--ink);outline-offset:-1px}
.field.invalid input,.field.invalid textarea{border-color:var(--sale)}
.field .msg{font-size:12px;color:var(--sale);display:none}
.field.invalid .msg{display:block}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 16px}
.pay-opt{display:flex;gap:14px;align-items:flex-start;padding:16px;border:1px solid #D6D6D6;margin-bottom:10px;cursor:pointer}
.pay-opt input{margin-top:4px;width:18px;height:18px;accent-color:#111}
.pay-opt b{display:block;font-size:14px}
.pay-opt small{color:var(--muted);font-size:13px}
.pay-opt:has(input:checked){border-color:var(--ink)}
.mini-item{display:flex;gap:14px;align-items:center;padding:10px 0}
.mini-item .cart-thumb{width:60px}
.mini-item .name{flex:1;font-size:13px}
.mini-item .name small{display:block;color:var(--muted)}
.mini-thumb-wrap{position:relative}
.mini-qty{position:absolute;top:-8px;right:-8px;min-width:20px;height:20px;border-radius:999px;background:#555;color:#fff;font-size:11px;display:flex;align-items:center;justify-content:center;z-index:2}

/* Thành công */
.success{max-width:640px;margin:0 auto;padding:80px 0 112px;text-align:center}
.success .tick{width:64px;height:64px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;margin:0 auto 24px}
.qr-box{margin:32px auto 0;padding:24px;border:1px solid var(--line);max-width:420px}
.qr-box img{margin:0 auto 12px;width:280px}
.order-code{font-size:22px;font-weight:700;letter-spacing:.08em}

/* Trang nội dung */
.prose{max-width:820px;margin:0 auto;padding:0 0 96px;line-height:1.85}
.prose h2{font-size:18px;letter-spacing:.08em;text-transform:uppercase;margin:40px 0 12px}

/* Thông báo */
.toast{position:fixed;left:50%;top:24px;transform:translateX(-50%) translateY(-20px);opacity:0;padding:14px 24px;background:var(--ink);color:#fff;font-size:13px;z-index:100;transition:all .25s;pointer-events:none;max-width:calc(100% - 32px);text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Responsive */
@media (max-width:1100px){
  .product-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .pdp,.cart-layout,.checkout-layout{grid-template-columns:1fr}
  .summary{position:static}
}
@media (max-width:760px){
  .container{padding:0 16px}
  .hotline{display:none}
  .menu-toggle{display:inline-flex}
  .logo{font-size:22px}
  .header-row{height:64px}
  .main-nav{display:none;flex-direction:column;align-items:flex-start;gap:0;padding:0 16px 12px}
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  .hero{height:560px}
  .product-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 12px}
  .collections{grid-template-columns:1fr}
  .collection{height:480px}
  .perks-grid{grid-template-columns:1fr}
  .perk{padding:24px}
  .footer-grid{grid-template-columns:1fr}
  .gallery{flex-direction:column-reverse}
  .thumbs{flex-direction:row;overflow-x:auto;flex:none}
  .thumb{flex:0 0 64px;width:64px}
  .section-title{font-size:22px}
  .grid-2{grid-template-columns:1fr}
  .cart-item{grid-template-columns:84px minmax(0,1fr)}
  .cart-thumb{width:84px}
  .cart-item .right{grid-column:2;flex-direction:row;align-items:center}
}