/* ============================================================
   TechZone — Cửa hàng điện thoại & phụ kiện
   Phong cách: Material / app thương mại điện tử. Header xanh 2 tầng
   (logo + tìm kiếm + giỏ; tầng dưới danh mục cuộn ngang), thẻ trắng nổi
   trên nền xám, giá đỏ, nhãn giảm giá vàng, thanh so sánh nổi, tab bar mobile.
   Font: Archivo (tiêu đề) + Inter (thân).
   ============================================================ */
:root{
  --brand:#1A56DB; --brand-d:#123C99; --brand-l:#E6EEFF;
  --bg:#F4F5F7; --card:#fff; --ink:#111827; --muted:#6B7280; --line:#E5E7EB;
  --price:#E02424; --sale:#FACC15; --ok:#059669; --star:#F59E0B;
  --ph:#EEF0F3; --r:12px; --sh:0 1px 3px rgba(17,24,39,.08),0 1px 2px rgba(17,24,39,.04);
  --sh2:0 10px 30px rgba(17,24,39,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:15px/1.6 'Inter',system-ui,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:'Archivo','Inter',sans-serif;font-weight:700;line-height:1.2;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.1rem}h4{font-size:1rem}
p{margin:0 0 1em}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
ul{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:8px 14px;z-index:999}
.skip:focus{left:8px;top:8px}
.ph{background:var(--img,var(--ph)) center/cover no-repeat}
.muted{color:var(--muted)}
.hide{display:none!important}

/* ---------- Nút ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:8px;border:1px solid var(--brand);background:var(--brand);color:#fff;font-weight:600;cursor:pointer;white-space:nowrap;transition:background .15s,box-shadow .15s}
.btn:hover{background:var(--brand-d);text-decoration:none;box-shadow:0 4px 12px rgba(26,86,219,.3)}
.btn--ghost{background:#fff;color:var(--brand)}
.btn--ghost:hover{background:var(--brand-l);box-shadow:none}
.btn--red{background:var(--price);border-color:var(--price)}
.btn--red:hover{background:#B91C1C;box-shadow:0 4px 12px rgba(224,36,36,.3)}
.btn--sm{padding:7px 14px;font-size:.9rem}
.btn--lg{padding:14px 26px;font-size:1.05rem}
.btn--block{width:100%}
.btn--white{background:#fff;border-color:#fff;color:var(--brand)}
.btn--white:hover{background:var(--brand-l);box-shadow:none}

/* ---------- Header ---------- */
.topbar{background:var(--brand);color:#fff;position:sticky;top:0;z-index:60}
.topbar__row{display:flex;align-items:center;gap:20px;padding:12px 0;position:relative}
.logo{display:flex;align-items:center;gap:8px;font-family:'Archivo',sans-serif;font-weight:700;font-size:1.35rem;color:#fff;letter-spacing:-.02em;flex-shrink:0}
.logo:hover{text-decoration:none}
.logo svg{width:32px;height:32px}
.logo b{color:var(--sale)}
.search{flex:1;min-width:0;position:relative}
.search__box{display:flex;background:#fff;border-radius:8px;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(0,0,0,.04)}
.search__box input{flex:1;min-width:0;border:0;padding:11px 14px;font-size:.95rem;outline:none;color:var(--ink)}
.search__box button{border:0;background:var(--brand-d);color:#fff;padding:0 18px;cursor:pointer;display:flex;align-items:center}
.search__box button:hover{background:#0E2F7A}
.search__box svg{width:20px;height:20px}
.search__chips{display:flex;gap:6px;margin-top:6px;overflow-x:auto;scrollbar-width:none}
.search__chips::-webkit-scrollbar{display:none}
.search__chips a{color:rgba(255,255,255,.85);font-size:.78rem;background:rgba(255,255,255,.14);padding:2px 10px;border-radius:99px;white-space:nowrap}
.search__chips a:hover{background:rgba(255,255,255,.28);text-decoration:none;color:#fff}
.topbar__actions{display:flex;align-items:center;gap:6px;flex-shrink:0}
.nav{display:flex;gap:2px}
.nav a{color:#fff;padding:8px 12px;border-radius:8px;font-weight:500;font-size:.95rem;white-space:nowrap}
.nav a:hover{background:rgba(255,255,255,.14);text-decoration:none}
.nav a.is-active{background:rgba(255,255,255,.2)}
.iconbtn{position:relative;display:inline-flex;flex-direction:column;align-items:center;gap:2px;color:#fff;padding:6px 10px;border-radius:8px;font-size:.72rem;line-height:1}
.iconbtn:hover{background:rgba(255,255,255,.14);text-decoration:none}
.iconbtn svg{width:24px;height:24px}
.iconbtn .cnt{position:absolute;top:2px;right:6px;background:var(--sale);color:var(--ink);font-weight:700;font-size:.66rem;min-width:17px;height:17px;border-radius:99px;display:flex;align-items:center;justify-content:center;padding:0 4px}
.burger{display:none;width:42px;height:42px;border:0;background:transparent;border-radius:8px;cursor:pointer;position:relative;flex-shrink:0}
.burger::before,.burger::after,.burger i{content:"";position:absolute;left:11px;right:11px;height:2px;background:#fff;border-radius:2px;transition:.2s}
.burger::before{top:14px}.burger i{top:20px}.burger::after{top:26px}
.catbar{background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh)}
.catbar ul{display:flex;gap:4px;overflow-x:auto;scrollbar-width:thin;padding:6px 0}
.catbar li{flex-shrink:0}
.catbar a{display:flex;align-items:center;gap:7px;padding:8px 12px;border-radius:8px;color:var(--ink);font-size:.9rem;font-weight:500;white-space:nowrap}
.catbar a:hover,.catbar a.is-active{background:var(--brand-l);color:var(--brand);text-decoration:none}
.catbar svg{width:20px;height:20px;color:var(--brand)}

/* ---------- Bố cục chung ---------- */
main{padding:22px 0 40px}
.sec{margin-bottom:34px}
.sec__head{display:flex;align-items:baseline;justify-content:space-between;gap:14px;margin-bottom:14px}
.sec__head h2{margin:0}
.sec__head a{font-weight:600;font-size:.92rem;white-space:nowrap}
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--sh)}
.crumb{font-size:.86rem;color:var(--muted);margin-bottom:14px;display:flex;gap:6px;flex-wrap:wrap}
.crumb a{color:var(--muted)}
.crumb span::before{content:"›";margin-right:6px}
.page-head{margin-bottom:18px}
.page-head p{color:var(--muted);margin:0}

/* ---------- Hero: carousel + banner nhỏ ---------- */
.hero{display:grid;grid-template-columns:2fr 1fr;gap:14px}
.carousel{position:relative;border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);min-height:360px;background:var(--brand-d)}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .6s;display:flex;align-items:flex-end}
.slide.is-on{opacity:1;z-index:1}
.slide .ph{position:absolute;inset:0}
.slide .ph::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,60,153,.92) 0%,rgba(18,60,153,.55) 50%,rgba(18,60,153,.1) 100%)}
.slide__body{position:relative;z-index:1;padding:36px;color:#fff;max-width:460px}
.slide__tag{display:inline-block;background:var(--sale);color:var(--ink);font-weight:700;font-size:.78rem;padding:3px 10px;border-radius:6px;margin-bottom:12px}
.slide__body h2{font-size:2rem;color:#fff;margin-bottom:8px}
.slide__body p{color:rgba(255,255,255,.88);margin-bottom:18px}
.slide--grad .ph{background:linear-gradient(135deg,#1A56DB,#0EA5E9)}
.slide--grad .ph::after{background:none}
.slide--dark .ph{background:radial-gradient(circle at 80% 30%,#334155,#0F172A)}
.slide--dark .ph::after{background:none}
.dots{position:absolute;bottom:14px;right:18px;z-index:2;display:flex;gap:6px}
.dots button{width:10px;height:10px;border-radius:99px;border:0;background:rgba(255,255,255,.5);cursor:pointer;padding:0;transition:width .2s}
.dots button.is-on{background:#fff;width:24px}
.hero__side{display:grid;grid-template-rows:1fr 1fr;gap:14px}
.mini{position:relative;border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);display:flex;align-items:flex-end;min-height:170px;color:#fff}
.mini .ph{position:absolute;inset:0}
.mini .ph::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(17,24,39,.85),rgba(17,24,39,.1))}
.mini--y{background:linear-gradient(135deg,#F59E0B,#FACC15);color:var(--ink)}
.mini__body{position:relative;z-index:1;padding:18px}
.mini__body h3{margin-bottom:4px;color:inherit}
.mini__body p{font-size:.88rem;margin-bottom:8px;opacity:.9}
.mini__body a{color:inherit;font-weight:700;font-size:.9rem}

/* ---------- Danh mục 8 ô ---------- */
.cats{display:grid;grid-template-columns:repeat(8,1fr);gap:10px}
.cat{background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:16px 8px;text-align:center;color:var(--ink);font-size:.86rem;font-weight:500;transition:transform .15s,box-shadow .15s}
.cat:hover{transform:translateY(-2px);box-shadow:var(--sh2);text-decoration:none;color:var(--brand)}
.cat i{display:flex;width:48px;height:48px;margin:0 auto 8px;border-radius:99px;background:var(--brand-l);color:var(--brand);align-items:center;justify-content:center}
.cat svg{width:24px;height:24px}

/* ---------- Flash sale ---------- */
.flash{background:linear-gradient(90deg,#E02424,#F97316);border-radius:var(--r);padding:16px;box-shadow:var(--sh)}
.flash__head{display:flex;align-items:center;gap:16px;flex-wrap:wrap;color:#fff;margin-bottom:14px}
.flash__head h2{margin:0;color:#fff;display:flex;align-items:center;gap:8px}
.flash__head h2 svg{width:26px;height:26px;color:var(--sale)}
.count{display:flex;align-items:center;gap:4px;font-weight:700}
.count span{background:var(--ink);color:#fff;border-radius:6px;padding:4px 8px;min-width:38px;text-align:center;font-family:'Archivo',sans-serif;font-size:1.05rem}
.count small{font-size:.8rem;font-weight:500;opacity:.9;margin-right:8px}
.flash__head>a{margin-left:auto;color:#fff;font-weight:600;font-size:.9rem}
.flash .pgrid{grid-template-columns:repeat(6,1fr)}
.sold{height:7px;background:#FEE2E2;border-radius:99px;overflow:hidden;margin-top:8px}
.sold i{display:block;height:100%;background:linear-gradient(90deg,#F97316,#E02424);border-radius:99px}
.sold+small{display:block;font-size:.74rem;color:var(--muted);margin-top:3px}

/* ---------- Thẻ sản phẩm ---------- */
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.pc{background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:12px;position:relative;display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s}
.pc:hover{transform:translateY(-3px);box-shadow:var(--sh2)}
.pc__badge{position:absolute;top:10px;left:10px;z-index:2;background:var(--sale);color:var(--ink);font-weight:700;font-size:.76rem;padding:3px 8px;border-radius:6px}
.pc__badge--new{background:var(--ok);color:#fff}
.pc__img{border-radius:8px;overflow:hidden;aspect-ratio:1;background:var(--ph);margin-bottom:10px;display:block}
.pc__img .ph{width:100%;height:100%}
.pc__name{font-weight:600;font-size:.95rem;line-height:1.35;color:var(--ink);display:block;margin-bottom:4px}
.pc__name:hover{color:var(--brand);text-decoration:none}
.pc__spec{font-size:.78rem;color:var(--muted);margin-bottom:6px}
.pc__spec span{display:inline-block;background:var(--bg);padding:1px 6px;border-radius:4px;margin:0 3px 3px 0}
.pc__price{margin-top:auto;display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.pc__price b{color:var(--price);font-size:1.08rem;font-family:'Archivo',sans-serif}
.pc__price s{color:var(--muted);font-size:.8rem}
.stars{display:inline-flex;align-items:center;gap:2px;color:var(--star);font-size:.8rem;letter-spacing:-1px}
.stars small{color:var(--muted);letter-spacing:0;margin-left:5px;font-size:.76rem}
.pc__foot{display:flex;align-items:center;justify-content:space-between;margin-top:8px;padding-top:8px;border-top:1px solid var(--line)}
.cmp{display:inline-flex;align-items:center;gap:6px;font-size:.8rem;color:var(--muted);cursor:pointer;user-select:none}
.cmp input{accent-color:var(--brand);width:15px;height:15px;margin:0}
.cmp:hover{color:var(--brand)}

/* Placeholder thiết bị vẽ bằng CSS (sản phẩm chưa có ảnh) */
.dev{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;background:linear-gradient(180deg,#F3F4F6,#E5E7EB);color:var(--muted);font-size:.72rem;font-weight:600;text-align:center;padding:10px}
.dev i{display:block;position:relative;flex-shrink:0}
.dev--phone i{width:34%;aspect-ratio:9/18.5;border:3px solid #374151;border-radius:16% / 8%;background:linear-gradient(160deg,#1A56DB,#0EA5E9 60%,#93C5FD)}
.dev--phone i::before{content:"";position:absolute;top:5px;left:50%;transform:translateX(-50%);width:36%;height:7px;background:#374151;border-radius:99px}
.dev--phone i::after{content:"";position:absolute;bottom:5px;left:50%;transform:translateX(-50%);width:40%;height:3px;background:rgba(255,255,255,.7);border-radius:99px}
.dev--ink i{background:linear-gradient(160deg,#111827,#374151)!important}
.dev--pink i{background:linear-gradient(160deg,#EC4899,#FBCFE8)!important}
.dev--green i{background:linear-gradient(160deg,#059669,#6EE7B7)!important}
.dev--purple i{background:linear-gradient(160deg,#7C3AED,#C4B5FD)!important}
.dev--gold i{background:linear-gradient(160deg,#B45309,#FCD34D)!important}
.dev--sky i{background:linear-gradient(160deg,#0369A1,#7DD3FC)!important}
.dev--buds i{width:50%;height:38%}
.dev--buds i::before,.dev--buds i::after{content:"";position:absolute;top:0;width:34%;height:100%;background:linear-gradient(180deg,#fff,#CBD5E1);border-radius:50% 50% 45% 45%;box-shadow:0 3px 6px rgba(0,0,0,.15)}
.dev--buds i::before{left:8%}.dev--buds i::after{right:8%}
.dev--case i{width:34%;aspect-ratio:9/18.5;border-radius:16% / 8%;background:linear-gradient(160deg,#374151,#111827);box-shadow:inset 0 0 0 3px #4B5563}
.dev--case i::before{content:"";position:absolute;top:8%;left:10%;width:36%;aspect-ratio:1;border-radius:22%;background:#1F2937;box-shadow:inset 0 0 0 2px #6B7280}
.dev--watch i{width:32%;aspect-ratio:1/1.1;border-radius:24%;background:#111827;box-shadow:inset 0 0 0 4px #374151}
.dev--watch i::before,.dev--watch i::after{content:"";position:absolute;left:18%;right:18%;height:60%;background:#4B5563;border-radius:10px;z-index:-1}
.dev--watch i::before{bottom:85%}.dev--watch i::after{top:85%}
.dev--watch i span{position:absolute;inset:22%;border-radius:99px;border:3px solid var(--sale);border-right-color:var(--ok);border-bottom-color:var(--brand)}
.dev--charger i{width:30%;aspect-ratio:1/1.2;border-radius:14%;background:linear-gradient(180deg,#fff,#E5E7EB);box-shadow:0 2px 6px rgba(0,0,0,.15)}
.dev--charger i::before{content:"";position:absolute;top:22%;left:50%;transform:translateX(-50%);width:30%;height:14%;background:#374151;border-radius:3px}
.dev--charger i::after{content:"";position:absolute;top:100%;left:50%;width:4px;height:30px;background:#374151;transform:translateX(-50%)}
.dev--cable i{width:60%;height:30%;border-bottom:4px solid #374151;border-radius:0 0 50% 50%}
.dev--cable i::before,.dev--cable i::after{content:"";position:absolute;top:100%;width:12px;height:22px;background:#6B7280;border-radius:3px}
.dev--cable i::before{left:-6px}.dev--cable i::after{right:-6px}
.dev--power i{width:52%;aspect-ratio:1.8;border-radius:12px;background:linear-gradient(180deg,#1F2937,#111827)}
.dev--power i::before{content:"";position:absolute;top:30%;left:12%;width:44%;height:12%;background:var(--ok);border-radius:3px}
.dev--power i::after{content:"";position:absolute;right:10%;top:30%;width:8px;height:8px;border-radius:99px;background:var(--sale);box-shadow:0 14px 0 var(--sale)}
.dev--glass i{width:34%;aspect-ratio:9/18.5;border-radius:10%/5%;background:rgba(255,255,255,.7);border:2px solid #93C5FD}
.dev--glass i::before{content:"";position:absolute;top:10%;left:15%;width:30%;height:2px;background:#93C5FD;transform:rotate(-45deg)}
.dev--speaker i{width:56%;aspect-ratio:2.2;border-radius:99px;background:linear-gradient(180deg,#374151,#111827)}
.dev--speaker i::before{content:"";position:absolute;inset:18% 12%;background:repeating-linear-gradient(90deg,#6B7280 0 3px,transparent 3px 7px);border-radius:99px}
.dev--tablet i{width:60%;aspect-ratio:4/3;border:3px solid #374151;border-radius:8%;background:linear-gradient(160deg,#1A56DB,#93C5FD)}
.dev--laptop i{width:62%;aspect-ratio:1.6;border:3px solid #374151;border-bottom-width:8px;border-radius:6% 6% 0 0;background:linear-gradient(160deg,#111827,#374151)}

/* ---------- Thanh so sánh nổi ---------- */
.cmpbar{position:fixed;left:0;right:0;bottom:0;z-index:70;background:#fff;border-top:2px solid var(--brand);box-shadow:0 -8px 24px rgba(17,24,39,.12);transform:translateY(120%);visibility:hidden;transition:transform .25s,visibility 0s .25s}
.cmpbar.is-on{transform:none;visibility:visible;transition:transform .25s}
.cmpbar .container{display:flex;align-items:center;gap:14px;padding-top:10px;padding-bottom:10px;flex-wrap:wrap}
.cmpbar__list{display:flex;gap:8px;flex:1;flex-wrap:wrap}
.cmpbar__item{display:flex;align-items:center;gap:8px;background:var(--brand-l);color:var(--brand);padding:6px 10px;border-radius:8px;font-size:.86rem;font-weight:600}
.cmpbar__item button{border:0;background:transparent;color:var(--brand);cursor:pointer;font-size:1rem;line-height:1;padding:0}
.cmpbar__note{font-size:.84rem;color:var(--muted)}

/* ---------- Thương hiệu ---------- */
.brands{display:grid;grid-template-columns:repeat(8,1fr);gap:10px}
.brand{background:#fff;border-radius:8px;box-shadow:var(--sh);padding:14px 6px;text-align:center;font-family:'Archivo',sans-serif;font-weight:700;letter-spacing:.06em;font-size:.9rem;color:#374151;text-transform:uppercase}
.brand:hover{color:var(--brand);text-decoration:none;box-shadow:var(--sh2)}

/* ---------- Lý do mua ---------- */
.why{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.why div{background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:20px;display:flex;gap:14px}
.why svg{width:36px;height:36px;color:var(--brand);flex-shrink:0}
.why h3{font-size:1rem;margin-bottom:4px}
.why p{font-size:.86rem;color:var(--muted);margin:0}

/* ---------- Tin công nghệ ---------- */
.news{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.news article{background:#fff;border-radius:var(--r);box-shadow:var(--sh);overflow:hidden}
.news .ph{aspect-ratio:16/9}
.news .ph--g1{background:linear-gradient(135deg,#1A56DB,#7C3AED)}
.news .ph--g2{background:linear-gradient(135deg,#0EA5E9,#059669)}
.news .ph--g3{background:linear-gradient(135deg,#F97316,#E02424)}
.news__body{padding:16px}
.news__body small{color:var(--muted);font-size:.78rem}
.news__body h3{font-size:1rem;margin:4px 0 6px}
.news__body p{font-size:.88rem;color:var(--muted);margin:0}

/* ---------- Footer ---------- */
.footer{background:#111827;color:#D1D5DB;padding:40px 0 0;margin-top:20px}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer h4{color:#fff;margin-bottom:12px;font-size:.95rem;text-transform:uppercase;letter-spacing:.05em}
.footer p,.footer li{font-size:.9rem;margin-bottom:6px}
.footer a{color:#D1D5DB}
.footer a:hover{color:#fff}
.footer .logo{margin-bottom:10px}
.footer__bot{border-top:1px solid #1F2937;margin-top:30px;padding:16px 0;font-size:.84rem;color:#9CA3AF;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.pay{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.pay span{background:#1F2937;color:#fff;font-size:.72rem;font-weight:700;padding:4px 8px;border-radius:4px}

/* ---------- Tab bar mobile ---------- */
.tabbar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:65;background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 16px rgba(17,24,39,.08)}
.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 4px 10px;font-size:.7rem;color:var(--muted);font-weight:500;position:relative}
.tabbar a.is-active{color:var(--brand)}
.tabbar a:hover{text-decoration:none}
.tabbar svg{width:24px;height:24px}
.tabbar .cnt{position:absolute;top:4px;left:calc(50% + 4px);background:var(--price);color:#fff;font-size:.62rem;font-weight:700;min-width:16px;height:16px;border-radius:99px;display:flex;align-items:center;justify-content:center}

/* ---------- Trang danh sách: bộ lọc ---------- */
.shop{display:grid;grid-template-columns:260px 1fr;gap:20px;align-items:start}
.filters{background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:18px;position:sticky;top:136px}
.filters h3{font-size:1rem;display:flex;justify-content:space-between;align-items:center}
.filters h3 button{border:0;background:none;color:var(--brand);font-size:.8rem;cursor:pointer;font-weight:600}
.fgroup{padding:12px 0;border-top:1px solid var(--line)}
.fgroup h4{font-size:.8rem;margin-bottom:8px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.fgroup label{display:flex;align-items:center;gap:8px;font-size:.9rem;padding:4px 0;cursor:pointer}
.fgroup input[type=checkbox],.fgroup input[type=radio]{accent-color:var(--brand);width:16px;height:16px;margin:0}
.fgroup select{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:#fff}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{border:1px solid var(--line);background:#fff;padding:5px 12px;border-radius:99px;font-size:.84rem;cursor:pointer;font-weight:500}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.is-on{background:var(--brand);border-color:var(--brand);color:#fff}
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:10px 14px;margin-bottom:14px;flex-wrap:wrap}
.toolbar__count{font-size:.9rem;color:var(--muted)}
.toolbar__count b{color:var(--ink)}
.toolbar label{display:flex;align-items:center;gap:8px;font-size:.9rem}
.toolbar select{padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:#fff}
.shop .pgrid{grid-template-columns:repeat(3,1fr)}
.empty{grid-column:1/-1;text-align:center;padding:40px;color:var(--muted);background:#fff;border-radius:var(--r)}
.filters__toggle{display:none;margin-bottom:12px}

/* ---------- Trang sản phẩm ---------- */
.pd{display:grid;grid-template-columns:1fr 1fr;gap:24px;background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:22px}
.gallery__main{aspect-ratio:1;border-radius:var(--r);overflow:hidden;background:var(--ph);margin-bottom:10px;position:relative}
.gallery__main .ph,.gallery__main .dev{width:100%;height:100%;position:absolute;inset:0;opacity:0;transition:opacity .25s}
.gallery__main .is-on{opacity:1}
.thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.thumbs button{aspect-ratio:1;border:2px solid var(--line);border-radius:8px;overflow:hidden;background:var(--ph);cursor:pointer;padding:0}
.thumbs button.is-on{border-color:var(--brand)}
.thumbs .ph,.thumbs .dev{width:100%;height:100%}
.thumbs .dev{font-size:0;gap:0}
.pd__info h1{font-size:1.5rem;margin-bottom:6px}
.pd__meta{display:flex;align-items:center;gap:14px;font-size:.86rem;color:var(--muted);margin-bottom:14px;flex-wrap:wrap}
.pd__price{display:flex;align-items:baseline;gap:12px;margin-bottom:6px;flex-wrap:wrap}
.pd__price b{font-family:'Archivo',sans-serif;font-size:1.9rem;color:var(--price)}
.pd__price s{color:var(--muted)}
.pd__price .off{background:var(--sale);font-weight:700;padding:2px 8px;border-radius:6px;font-size:.82rem}
.opt{margin:14px 0}
.opt h4{font-size:.88rem;margin-bottom:8px}
.opt h4 span{font-weight:400;color:var(--muted)}
.swatches{display:flex;gap:8px}
.swatch{width:36px;height:36px;border-radius:99px;border:2px solid #fff;box-shadow:0 0 0 1px var(--line);cursor:pointer;padding:0}
.swatch.is-on{box-shadow:0 0 0 2px var(--brand)}
.promo{border:1px dashed var(--price);background:#FEF2F2;border-radius:8px;padding:12px 14px;margin:14px 0}
.promo h4{color:var(--price);font-size:.9rem;margin-bottom:6px}
.promo li{font-size:.88rem;padding-left:20px;position:relative;margin-bottom:4px}
.promo li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:700}
.pd__cta{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.pd__cta .btn--wide{grid-column:1/-1}
.pd__trust{display:flex;gap:16px;flex-wrap:wrap;margin-top:14px;font-size:.82rem;color:var(--muted)}
.pd__trust span{display:flex;align-items:center;gap:5px}
.pd__trust svg{width:16px;height:16px;color:var(--ok)}
.pd__tabs{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;margin-top:20px;align-items:start}
.spec{width:100%;border-collapse:collapse;font-size:.92rem}
.spec th,.spec td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.spec th{width:38%;color:var(--muted);font-weight:500;background:#FAFAFA}
.box{background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:20px}
.box h2{font-size:1.2rem}
.rate{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:center;margin-bottom:16px}
.rate__big{text-align:center}
.rate__big b{font-family:'Archivo',sans-serif;font-size:2.6rem;color:var(--ink);display:block;line-height:1}
.rate__big .stars{font-size:1rem}
.rbar{display:grid;grid-template-columns:34px 1fr 36px;gap:8px;align-items:center;font-size:.82rem;margin-bottom:4px}
.rbar i{height:8px;background:var(--bg);border-radius:99px;overflow:hidden;display:block}
.rbar i b{display:block;height:100%;background:var(--star);border-radius:99px}
.review{border-top:1px solid var(--line);padding:12px 0}
.review__head{display:flex;justify-content:space-between;gap:10px;font-size:.86rem;margin-bottom:4px}
.review p{font-size:.9rem;margin:0}
.qcmp{overflow-x:auto}
.qcmp table{width:100%;border-collapse:collapse;font-size:.88rem;min-width:520px}
.qcmp th,.qcmp td{padding:10px;border-bottom:1px solid var(--line);text-align:center}
.qcmp th:first-child,.qcmp td:first-child{text-align:left;color:var(--muted);font-weight:500}
.qcmp thead th{font-family:'Archivo',sans-serif}
.qcmp .dev{height:90px;width:90px;margin:0 auto 6px;border-radius:8px;font-size:0;gap:0}
.qcmp .cur{background:var(--brand-l)}

/* ---------- Giỏ hàng ---------- */
.cart{display:grid;grid-template-columns:1fr 360px;gap:20px;align-items:start}
.citem{display:grid;grid-template-columns:90px 1fr auto;gap:14px;padding:16px;border-bottom:1px solid var(--line);align-items:center}
.citem:last-child{border-bottom:0}
.citem__img{width:90px;height:90px;border-radius:8px;overflow:hidden;background:var(--ph)}
.citem__img .ph,.citem__img .dev{width:100%;height:100%}
.citem__img .dev{font-size:0;gap:0}
.citem h3{font-size:.98rem;margin-bottom:2px}
.citem small{color:var(--muted);display:block;margin-bottom:8px}
.qty{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.qty button{width:34px;height:34px;border:0;background:#fff;cursor:pointer;font-size:1.1rem;color:var(--brand)}
.qty button:hover{background:var(--brand-l)}
.qty input{width:44px;text-align:center;border:0;border-left:1px solid var(--line);border-right:1px solid var(--line);font-weight:600}
.citem__right{text-align:right}
.citem__right b{font-family:'Archivo',sans-serif;color:var(--price);font-size:1.05rem;display:block}
.citem__right button{border:0;background:none;color:var(--muted);font-size:.82rem;cursor:pointer;margin-top:6px;text-decoration:underline}
.sum{position:sticky;top:136px}
.sum h2{font-size:1.15rem}
.sum__row{display:flex;justify-content:space-between;font-size:.92rem;padding:6px 0}
.sum__row.total{border-top:2px solid var(--ink);margin-top:8px;padding-top:12px;font-weight:700;font-size:1.1rem}
.sum__row.total b{color:var(--price);font-family:'Archivo',sans-serif;font-size:1.35rem}
.sum__row .ok{color:var(--ok)}
.coupon{display:flex;gap:8px;margin:12px 0 4px}
.coupon input{flex:1;min-width:0;padding:10px 12px;border:1px solid var(--line);border-radius:8px}
.msg{font-size:.82rem;margin:0 0 10px;min-height:1.2em}
.msg.ok{color:var(--ok)}.msg.err{color:var(--price)}
.radios{display:grid;gap:8px;margin:12px 0}
.radios label{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);border-radius:8px;cursor:pointer;font-size:.9rem}
.radios label:has(input:checked){border-color:var(--brand);background:var(--brand-l)}
.radios input{accent-color:var(--brand);margin-top:3px}
.radios small{display:block;color:var(--muted)}

/* ---------- Form chung ---------- */
.field{margin-bottom:14px}
.field label{display:block;font-weight:600;font-size:.88rem;margin-bottom:5px}
.field input,.field select,.field textarea{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;outline:none;transition:border .15s,box-shadow .15s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-l)}
.field textarea{min-height:110px;resize:vertical}
.field input[type=range]{padding:0;border:0;accent-color:var(--brand);box-shadow:none}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field output{font-weight:700;color:var(--brand)}

/* ---------- Trả góp ---------- */
.calc{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
.result{background:linear-gradient(135deg,var(--brand),var(--brand-d));color:#fff;border-radius:var(--r);padding:24px}
.result h2{color:#fff;font-size:1.1rem}
.result__big{font-family:'Archivo',sans-serif;font-size:2.4rem;font-weight:700;line-height:1.1;margin:8px 0 4px}
.result__big small{font-size:1rem;font-weight:500;opacity:.85}
.result dl{display:grid;grid-template-columns:1fr auto;gap:6px 14px;margin:16px 0 0;font-size:.92rem;border-top:1px solid rgba(255,255,255,.25);padding-top:14px}
.result dt{opacity:.85}.result dd{margin:0;font-weight:600;text-align:right}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.step{background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:18px;position:relative}
.step b{display:flex;width:32px;height:32px;border-radius:99px;background:var(--brand);color:#fff;align-items:center;justify-content:center;font-family:'Archivo',sans-serif;margin-bottom:10px}
.step p{font-size:.88rem;color:var(--muted);margin:0}
.partners{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}
.partners div{background:#fff;border-radius:8px;box-shadow:var(--sh);padding:16px 8px;text-align:center;font-family:'Archivo',sans-serif;font-weight:700;color:#374151}
.partners small{display:block;font-family:'Inter',sans-serif;font-weight:400;color:var(--muted);font-size:.74rem}
.cond{columns:2;column-gap:30px;font-size:.92rem}
.cond li{break-inside:avoid;padding:6px 0 6px 24px;position:relative}
.cond li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:700}

/* ---------- Liên hệ ---------- */
.stores{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.store{background:#fff;border-radius:var(--r);box-shadow:var(--sh);overflow:hidden}
.store .ph{aspect-ratio:16/9}
.store__body{padding:16px}
.store__body h3{font-size:1.02rem;margin-bottom:6px}
.store__body p{font-size:.88rem;margin-bottom:4px;color:var(--muted);display:flex;gap:8px}
.store__body svg{width:16px;height:16px;flex-shrink:0;color:var(--brand);margin-top:3px}
.store__body a{font-weight:600}
.contact{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
.hot{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.hot div{background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:18px;text-align:center}
.hot small{display:block;color:var(--muted);font-size:.82rem}
.hot b{font-family:'Archivo',sans-serif;font-size:1.3rem;color:var(--brand)}
.faq details{background:#fff;border-radius:8px;box-shadow:var(--sh);margin-bottom:8px}
.faq summary{padding:14px 16px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand);font-weight:700}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 16px 14px;margin:0;font-size:.92rem;color:var(--muted)}

/* ---------- Responsive ---------- */
@media (max-width:1100px){
  .cats{grid-template-columns:repeat(4,1fr)}
  .brands{grid-template-columns:repeat(4,1fr)}
  .flash .pgrid{grid-template-columns:repeat(3,1fr)}
  .shop{grid-template-columns:220px 1fr}
  .shop .pgrid{grid-template-columns:repeat(2,1fr)}
  .partners{grid-template-columns:repeat(3,1fr)}
  .nav a{padding:8px 9px;font-size:.9rem}
}
@media (max-width:980px){
  .topbar__row{flex-wrap:wrap;gap:10px}
  .search{order:3;flex-basis:100%}
  .topbar__actions{margin-left:auto}
  .burger{display:block}
  .nav{display:none;position:absolute;left:-20px;right:-20px;top:100%;background:var(--brand-d);flex-direction:column;padding:8px 20px 12px;box-shadow:var(--sh2);z-index:5}
  .nav.is-open{display:flex}
  .nav a{padding:12px 10px;border-bottom:1px solid rgba(255,255,255,.1)}
  .burger.is-open::before{transform:translateY(6px) rotate(45deg)}
  .burger.is-open i{opacity:0}
  .burger.is-open::after{transform:translateY(-6px) rotate(-45deg)}
  .hero{grid-template-columns:1fr}
  .hero__side{grid-template-rows:none;grid-template-columns:1fr 1fr}
  .pgrid{grid-template-columns:repeat(3,1fr)}
  .why{grid-template-columns:1fr 1fr}
  .footer__grid{grid-template-columns:1fr 1fr}
  .pd,.pd__tabs,.cart,.calc,.contact{grid-template-columns:1fr}
  .sum,.filters{position:static}
  .stores{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .shop{grid-template-columns:1fr}
  .filters{display:none}
  .filters.is-open{display:block}
  .filters__toggle{display:inline-flex}
  .shop .pgrid{grid-template-columns:repeat(3,1fr)}
  .tabbar{display:flex}
  body{padding-bottom:64px}
  .cmpbar{bottom:60px}
}
@media (max-width:640px){
  body{font-size:14px}
  h1{font-size:1.6rem}h2{font-size:1.25rem}
  .container{padding:0 16px}
  .logo span{display:none}
  .iconbtn span{display:none}
  .nav{left:-16px;right:-16px;padding:8px 16px 12px}
  .carousel{min-height:300px}
  .slide__body{padding:22px}
  .slide__body h2{font-size:1.4rem}
  .hero__side{grid-template-columns:1fr}
  .mini{min-height:130px}
  .cats{grid-template-columns:repeat(4,1fr);gap:8px}
  .cat{padding:12px 4px;font-size:.76rem}
  .cat i{width:40px;height:40px}
  .pgrid,.flash .pgrid,.shop .pgrid{grid-template-columns:repeat(2,1fr);gap:10px}
  .pc{padding:10px}
  .pc__name{font-size:.86rem}
  .why,.news,.footer__grid,.row2,.steps,.hot{grid-template-columns:1fr}
  .brands{grid-template-columns:repeat(2,1fr)}
  .partners{grid-template-columns:repeat(2,1fr)}
  .pd{padding:14px}
  .pd__cta{grid-template-columns:1fr}
  .citem{grid-template-columns:70px 1fr;gap:10px}
  .citem__img{width:70px;height:70px}
  .citem__right{grid-column:2;text-align:left;display:flex;gap:14px;align-items:center}
  .citem__right button{margin-top:0}
  .cond{columns:1}
  .flash__head>a{margin-left:0}
  .count span{min-width:32px;font-size:.95rem;padding:3px 6px}
}