/* ZARES: nền đá graphite, chữ chrome, một tông màu duy nhất theo nhãn */
:root{
  color-scheme:dark;
  --bg:#0E0F11; --panel:#17191C; --stone:#1F2226; --line:#2C3035;
  --fg:#F2F4F6; --muted:#9BA2AA; --chrome:#D7DCE1; --steel:#7D858E;
  --ok:#5BC08A; --warn:#E3B341; --bad:#E5636B;
  --display:"Barlow Condensed","Arial Narrow",Impact,sans-serif;
  --body:"Be Vietnam Pro","Segoe UI",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
[hidden]{display:none!important}
.wrap{max-width:1160px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
h1,h2,h3{font-family:var(--display);line-height:.98;margin:0;text-wrap:balance;text-transform:uppercase}
p{margin:0}
a{color:inherit}
button{font:inherit;cursor:pointer}
input,textarea,select{font:inherit;color:var(--fg)}
:focus-visible{outline:2px solid var(--chrome);outline-offset:3px}
.chrome{background:linear-gradient(180deg,#FFFFFF 0%,#C9CFD5 45%,#6E767E 52%,#E3E7EB 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.32em;text-transform:uppercase;color:var(--muted)}
.muted{color:var(--muted)}
.fine{font-size:13px;color:var(--muted)}
.fine a{color:var(--chrome)}
.empty{color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--chrome);color:#0E0F11;border:1px solid var(--chrome);font-weight:700;padding:13px 26px;text-decoration:none;letter-spacing:.06em;text-transform:uppercase;font-size:14px;clip-path:polygon(10px 0,100% 0,calc(100% - 10px) 100%,0 100%);transition:background .2s}
.btn:hover{background:#fff}
.btn.ghost{background:transparent;color:var(--fg);border-color:var(--steel)}
.btn.ghost:hover{background:var(--stone)}
.btn[disabled]{opacity:.6;cursor:wait}

.site-head{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:rgba(14,15,17,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-head nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:12px}
.logo{display:flex;flex-direction:column;text-decoration:none;line-height:1}
.logo b{font-family:var(--display);font-style:italic;font-weight:800;font-size:32px;letter-spacing:.02em}
.logo small{font-size:8px;letter-spacing:.38em;color:var(--muted);margin-top:2px}
.links{display:flex;gap:28px;font-size:14px;letter-spacing:.08em;text-transform:uppercase}
.links a{text-decoration:none;color:var(--muted)}
.links a:hover{color:var(--fg)}
.cart-btn{position:relative;background:transparent;border:1px solid var(--steel);color:var(--fg);padding:8px 16px;font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.cart-btn b{position:absolute;top:-9px;right:-9px;background:var(--chrome);color:#0E0F11;font-size:11px;min-width:20px;height:20px;border-radius:10px;display:grid;place-items:center;padding:0 5px}
@media (max-width:820px){.links{display:none}}

.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.btn.sm{padding:9px 18px;font-size:12px}
/* Banner trang chủ: 1920×800 trên máy tính, 1080×1350 trên điện thoại */
.banner{padding-block:0;border-bottom:1px solid var(--line);background:var(--panel)}
.banner a,.banner picture{display:block}
.banner img{width:100%;height:auto;aspect-ratio:1920/800;object-fit:cover}
@media (max-width:767px){.banner.has-mobile img{aspect-ratio:1080/1350}}
.banner-empty{padding-block:48px;border:1px dashed var(--steel);border-inline:0;aspect-ratio:auto}
.banner-empty .wrap{display:grid;gap:12px;justify-items:start;color:var(--muted)}
.banner-empty b{color:var(--fg)}
.hero{padding-block:0;position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:radial-gradient(120% 90% at 80% 10%,#2A2E33 0%,transparent 60%),var(--bg)}
.hero::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(115deg,transparent 0 120px,rgba(255,255,255,.025) 120px 122px);pointer-events:none}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:center;padding-block:56px 48px}
.hero h1{font-size:clamp(46px,7.6vw,96px);font-weight:800;font-style:italic;margin-top:14px}
.hero .tag{margin-top:18px;display:flex;gap:14px;align-items:center;font-size:14px;letter-spacing:.28em;text-transform:uppercase;color:var(--chrome)}
.hero .tag i{width:1px;height:16px;background:var(--steel)}
.hero .lead{color:var(--muted);font-size:17px;max-width:33em;margin-top:20px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.shelf{position:relative;display:flex;align-items:flex-end;justify-content:center;gap:4%;padding-bottom:28px;min-height:280px}
.shelf::after{content:"";position:absolute;left:0;right:0;bottom:0;height:34px;background:linear-gradient(180deg,#2A2D31,#151719);border-top:1px solid #3A3F45;clip-path:polygon(4% 0,96% 0,100% 100%,0 100%)}
.shelf-item{position:relative;z-index:1;width:34%;filter:drop-shadow(0 18px 18px rgba(0,0,0,.6))}
.shelf-item.is-can{width:24%}
.shelf-item svg,.shelf-item img{width:100%;height:auto}
.script{position:absolute;top:2%;right:2%;font-family:var(--display);font-style:italic;font-weight:700;font-size:clamp(22px,2.6vw,30px);transform:rotate(-8deg);color:var(--chrome);text-align:right;line-height:1;z-index:2}
@media (max-width:880px){.hero .wrap{grid-template-columns:1fr}.shelf{max-width:520px;margin:0 auto;width:100%}}

.benefits{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line)}
.benefits>div{padding:28px 22px;display:flex;gap:14px;align-items:flex-start;border-right:1px solid var(--line);color:var(--chrome)}
.benefits>div:last-child{border-right:0}
.benefits svg{flex:none;width:40px;height:40px}
.benefits h3{font-size:20px;color:var(--fg)}
.benefits p{color:var(--muted);font-size:14px}
@media (max-width:900px){.benefits{grid-template-columns:1fr 1fr}.benefits>div:nth-child(2){border-right:0}.benefits>div:nth-child(-n+2){border-bottom:1px solid var(--line)}}
@media (max-width:520px){.benefits{grid-template-columns:1fr}.benefits>div{border-right:0;border-bottom:1px solid var(--line)}}

section{padding-block:80px}
section.pt0{padding-top:0}
.head{display:flex;justify-content:space-between;align-items:end;gap:24px;flex-wrap:wrap;margin-bottom:36px}
.head h2,.h2{font-size:clamp(38px,5.4vw,64px);font-weight:800;font-style:italic;margin-top:8px}
.h2{margin-bottom:28px}
.h3{font-size:clamp(30px,3.6vw,42px);font-style:italic;margin-block:8px 18px}
.head p{color:var(--muted);max-width:30em}

.tabs{display:flex;gap:6px;flex-wrap:wrap}
.tabs button{background:transparent;border:1px solid var(--line);color:var(--muted);padding:8px 18px;font-size:13px;letter-spacing:.1em;text-transform:uppercase}
.tabs button[aria-pressed="true"]{background:var(--chrome);color:#0E0F11;border-color:var(--chrome)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.grid>div{display:flex}
.prod{background:var(--panel);border:1px solid var(--line);display:flex;flex-direction:column;transition:border-color .2s,transform .2s;width:100%}
.prod:hover{border-color:var(--steel);transform:translateY(-3px)}
.prod .pic{aspect-ratio:1/0.9;display:grid;place-items:center;background:radial-gradient(70% 60% at 50% 40%,#2B2F34,transparent 70%),var(--stone);border-bottom:1px solid var(--line);overflow:hidden}
.prod .pic svg{height:78%;width:auto;max-width:80%;filter:drop-shadow(0 14px 14px rgba(0,0,0,.55))}
.prod .pic img{width:100%;height:100%;object-fit:cover}
.prod .info{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.prod .kind{font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--muted)}
.prod h3{font-size:30px;font-style:italic}
.prod h3 a{text-decoration:none}
.prod h3 a:hover{text-decoration:underline;text-underline-offset:4px}
.prod .desc{color:var(--muted);font-size:14px}
.meter{display:grid;grid-template-columns:92px 1fr;align-items:center;gap:10px;font-size:12px;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.bars{display:flex;gap:4px}
.bars i{flex:1;height:6px;background:var(--line);transform:skewX(-20deg)}
.bars i.on{background:var(--chrome)}
.prod .row{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:12px;border-top:1px solid var(--line)}
.price{font-family:var(--display);font-weight:800;font-size:28px;font-variant-numeric:tabular-nums}
.add{background:transparent;border:1px solid var(--chrome);color:var(--fg);padding:7px 14px;font-size:12px;letter-spacing:.1em;text-transform:uppercase}
.add:hover{background:var(--chrome);color:#0E0F11}

.finder{background:var(--panel);border-block:1px solid var(--line)}
.fgrid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
@media (max-width:880px){.fgrid{grid-template-columns:1fr}}
fieldset{border:0;padding:0;margin:0 0 24px;min-width:0}
legend{font-family:var(--display);font-size:22px;text-transform:uppercase;font-weight:600;margin-bottom:12px}
.opts{display:flex;gap:10px;flex-wrap:wrap}
.opts label{position:relative;border:1px solid var(--line);padding:10px 16px;cursor:pointer;font-size:15px}
.opts input{position:absolute;opacity:0;pointer-events:none}
.opts label:has(input:checked){border-color:var(--chrome);background:var(--stone)}
.opts label:has(input:focus-visible){outline:2px solid var(--chrome);outline-offset:2px}
.result{border:1px solid var(--steel);background:var(--stone);padding:26px;display:grid;grid-template-columns:130px 1fr;gap:20px;align-items:center}
.result-pic svg,.result-pic img{width:100%;height:auto}
.result h3{font-size:36px;font-style:italic;margin-block:6px}
.result p{color:var(--muted)}
.result-actions{margin-top:16px;display:flex;gap:10px;flex-wrap:wrap}
@media (max-width:440px){.result{grid-template-columns:1fr}.result-pic{max-width:130px}}

.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);counter-reset:s;border-top:1px solid var(--line)}
.steps li{counter-increment:s;padding:26px 22px 0 0;display:flex;flex-direction:column;gap:8px}
.steps li::before{content:"0" counter(s);font-family:var(--display);font-weight:800;font-style:italic;font-size:54px;line-height:1;color:transparent;-webkit-text-stroke:1px var(--steel)}
.steps h3{font-size:22px}
.steps p{color:var(--muted);font-size:14px;max-width:24em}
@media (max-width:880px){.steps{grid-template-columns:1fr 1fr;row-gap:20px}}
@media (max-width:480px){.steps{grid-template-columns:1fr}}

.faq{max-width:780px;border-top:1px solid var(--line)}
details{border-bottom:1px solid var(--line);padding:18px 0}
summary{font-weight:700;font-size:17px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-family:var(--display);font-size:26px;line-height:1;color:var(--chrome)}
details[open] summary::after{content:"−"}
details p{color:var(--muted);margin-top:10px;max-width:60ch}

/* Trang chi tiết sản phẩm */
.crumbs{display:flex;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--muted);padding-block:20px 0}
.crumbs a{text-decoration:none}
.crumbs a:hover{color:var(--fg)}
.crumbs b{color:var(--fg);font-weight:500}
.draft-note{margin-top:16px;border:1px solid var(--warn);color:var(--warn);padding:10px 14px;font-size:14px}
.pd{padding-block:32px 72px}
.pd-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
@media (max-width:880px){.pd-grid{grid-template-columns:1fr;gap:28px}}
.pd-visual{position:sticky;top:90px;aspect-ratio:1/1;display:grid;place-items:center;background:radial-gradient(70% 60% at 50% 40%,#2E3237,transparent 70%),var(--stone);border:1px solid var(--line);overflow:hidden}
.pd-visual svg{width:72%;height:auto;max-height:84%;filter:drop-shadow(0 24px 22px rgba(0,0,0,.6))}
.pd-visual svg.art-can{width:auto;height:84%}
.pd-visual img{width:100%;height:100%;object-fit:cover}
@media (max-width:880px){.pd-visual{position:static}}
.pd-info{display:flex;flex-direction:column;gap:16px;min-width:0}
.pd-info h1{font-size:clamp(48px,6.4vw,84px);font-style:italic;font-weight:800}
.pd-label{font-size:13px;letter-spacing:.24em;color:var(--chrome)}
.pd-tagline{font-size:18px;color:var(--muted);max-width:32em}
.pd-price{display:flex;align-items:baseline;gap:12px}
.pd-price .price{font-size:44px}
.pd-price s{color:var(--muted);font-size:18px}
.pd-meters{display:grid;gap:10px;max-width:380px}
.pd-features{list-style:none;margin:0;padding:16px 0 0;border-top:1px solid var(--line);display:grid;gap:8px}
.pd-features li{display:flex;gap:10px;align-items:baseline}
.pd-features li::before{content:"";flex:none;width:10px;height:2px;background:var(--chrome);transform:translateY(-4px)}
.pd-buy{display:flex;gap:10px;flex-wrap:wrap;align-items:stretch;padding-top:8px}
.qty{display:flex;border:1px solid var(--steel)}
.qty button{width:44px;background:transparent;border:0;color:var(--fg);font-size:20px}
.qty input{width:52px;text-align:center;background:transparent;border:0;border-inline:1px solid var(--line);font-variant-numeric:tabular-nums;-moz-appearance:textfield}
.qty input::-webkit-inner-spin-button{-webkit-appearance:none}
.pd-detail{display:grid;grid-template-columns:1.2fr 1fr;gap:56px;border-top:1px solid var(--line);padding-top:48px}
@media (max-width:880px){.pd-detail{grid-template-columns:1fr;gap:36px}}
.prose{display:grid;gap:14px;color:#C9CED4;max-width:62ch}
.howto{margin:0;padding:0;list-style:none;counter-reset:h;display:grid;gap:14px}
.howto li{counter-increment:h;display:grid;grid-template-columns:44px 1fr;gap:12px;align-items:baseline;color:#C9CED4}
.howto li::before{content:"0" counter(h);font-family:var(--display);font-weight:800;font-style:italic;font-size:30px;color:var(--chrome)}
.nf{display:flex;flex-direction:column;gap:16px;align-items:flex-start;padding-block:40px}
.nf h1{font-size:clamp(44px,6vw,72px);font-style:italic}
.nf p{color:var(--muted)}

.site-foot{border-top:1px solid var(--line);padding-block:44px;background:#0A0B0C}
.site-foot .wrap{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
.site-foot p{color:var(--muted);font-size:14px;max-width:30em;margin-top:12px}
.contact{display:grid;grid-template-columns:auto auto;gap:6px 20px;font-size:15px;align-content:start}
.contact span{color:var(--muted);font-size:12px;letter-spacing:.14em;text-transform:uppercase;align-self:center}
.contact a{font-weight:700;text-decoration:none}
.contact a:hover{text-decoration:underline}

/* Giỏ hàng */
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:40}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(420px,100%);background:var(--panel);border-left:1px solid var(--steel);z-index:41;display:flex;flex-direction:column;gap:16px;padding:calc(20px + env(safe-area-inset-top,0px)) calc(20px + env(safe-area-inset-right,0px)) calc(20px + env(safe-area-inset-bottom,0px)) 20px}
.drawer .top{display:flex;justify-content:space-between;align-items:center}
.drawer h2{font-size:34px;font-style:italic}
.drawer-body{flex:1;overflow:auto;display:flex;flex-direction:column;gap:16px}
.x{background:transparent;border:1px solid var(--steel);color:var(--fg);width:40px;height:40px;font-size:20px}
.items{display:flex;flex-direction:column;gap:12px}
.item{display:grid;grid-template-columns:1fr auto;gap:4px 12px;align-items:center;border-bottom:1px solid var(--line);padding-bottom:12px}
.item small{color:var(--muted)}
.item a{text-decoration:none;font-weight:700}
.q{display:flex;gap:8px;align-items:center;font-variant-numeric:tabular-nums}
.q button{width:28px;height:28px;border:1px solid var(--steel);background:transparent;color:var(--fg)}
.total{display:flex;justify-content:space-between;font-family:var(--display);font-size:28px;font-weight:800;font-variant-numeric:tabular-nums}
.checkout{display:grid;gap:12px;border-top:1px solid var(--line);padding-top:16px}
.checkout h3{font-size:22px}
.checkout label{display:grid;gap:4px;font-size:13px;color:var(--muted)}
.checkout input,.checkout textarea{background:var(--bg);border:1px solid var(--line);padding:10px 12px;font-size:15px;width:100%}
.checkout input:focus,.checkout textarea:focus{border-color:var(--chrome);outline:none}
.form-msg{font-size:14px;color:var(--bad)}
.done{border:1px solid var(--ok);padding:16px;display:grid;gap:8px}
.done h3{font-size:26px;color:var(--ok)}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Logo ảnh (tải lên trong Cài đặt): cao 40px trên đầu trang, 52px ở chân trang */
.logo-img{height:40px;width:auto;max-width:220px;object-fit:contain;display:block}
.site-foot .logo-img{height:52px;max-width:260px}