/* ============================================================
   SOLAR ECOM — Playful Optimism design system
   Nền trung tính ấm (Soft Vanilla / Hazelnut) 60% + pops sáng
   (Butter Yellow, Amber, Azure) 30% + Flamingo Pink 10%.
   Căng thẳng ấm–mát: cam/hoàng trái ngược xanh azure.
   ============================================================ */
/* ============================================================
   SOLAR ECOM — Viettel Construction brand
   Đỏ Viettel #EE0033 (chủ đạo) · Xám than #44494D (kỹ thuật)
   Đen #000 (nhấn/text) · Trắng/Xám nhạt #F2F2F2 (nền tối giản)
   ============================================================ */
:root{
  --bg:#F2F2F2; --surface:#FFFFFF; --raised:#ECEFF1; --border:#D7DBDE;
  --text:#15181A; --muted:#44494D;
  --red:#EE0033; --red-dark:#C4002A; --red-bg:rgba(238,0,51,.10);
  --ink:#000000;
  --sun:#EE0033; --sun2:#C4002A;
  --butter:#EE0033; --amber:#EE0033; --pink:#EE0033;
  --azure:#44494D; --blue:#44494D; --blue-bg:rgba(68,73,77,.10);
  --teal:#44494D;
  --green:#1F9D55; --green-bg:rgba(31,157,85,.12);
  --alert:#EE0033;
  --radius:8px; --container:1200px; --mono:ui-monospace,Menlo,Consolas,monospace;
  --sh:0 1px 2px rgba(0,0,0,.10); --sh2:0 14px 34px rgba(0,0,0,.14);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);
  font:15px/1.6 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased}
h1,h2,h3{margin:0;letter-spacing:-.02em;font-weight:900}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
.container{max-width:var(--container);margin:0 auto;padding:0 16px}
.wrap{max-width:var(--container);margin:0 auto;padding:0 16px}
.mono{font-family:var(--mono)}
.muted{color:var(--muted)}.dim{color:var(--muted)}
.tiny{font-size:12.5px}.sm{font-size:13.5px}
.b{font-weight:600}.bb{font-weight:700}
.row{display:flex;align-items:center;gap:12px}
.wrapf{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.grow{flex:1;min-width:0}
.center{text-align:center}
.mt16{margin-top:16px}.mt24{margin-top:24px}.mb16{margin-bottom:16px}

/* ---------- nameplate (yếu tố nhận diện) ---------- */
.nameplate{display:flex;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--raised)}
.nameplate div{flex:1;text-align:center;padding:8px 10px;border-right:1px solid var(--border)}
.nameplate div:last-child{border-right:none}
.nameplate div.empty{border:none}
.nameplate .k{font-size:10.5px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:700}
.nameplate .v{font-family:var(--mono);font-weight:700;color:var(--amber);font-size:14px}

/* ---------- buttons / eyebrow ---------- */
.eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:.14em;font-weight:700;color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:var(--radius);
  border:1px solid var(--border);background:transparent;cursor:pointer;font-weight:700;font-size:14px;transition:.15s}
.btn:hover{border-color:var(--muted)}
.btn.sun,.btn-primary{background:var(--red);border-color:var(--red);color:#fff}
.btn.sun:hover,.btn-primary:hover{background:var(--red-dark);border-color:var(--red-dark)}
.btn.dark{background:var(--ink);border-color:var(--ink);color:#fff}
.btn.dark:hover{background:#222}
.btn.ghost{background:transparent;border-color:rgba(0,0,0,.25);color:var(--text)}
.btn.ghost:hover{background:rgba(0,0,0,.05)}
.btn.block{width:100%}
.btn.sm{padding:7px 13px;font-size:13px}
.btn:disabled{opacity:.45;cursor:not-allowed}

.badge{display:inline-block;padding:2px 8px;border-radius:4px;font-size:10px;font-weight:700;text-transform:uppercase;background:var(--red);color:#fff}
.badge.alert{background:var(--red-dark);color:#fff}
.tag{display:inline-block;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:600;font-family:var(--mono)}
.t-sun{background:rgba(255,138,30,.16);color:var(--amber)}
.t-green{background:var(--green-bg);color:var(--green)}
.t-blue{background:var(--blue-bg);color:var(--azure)}
.t-red{background:rgba(255,90,60,.16);color:var(--alert)}
.t-grey{background:rgba(147,130,107,.16);color:var(--muted)}

/* ---------- header ---------- */
.announce{text-align:center;font-size:13.5px;font-weight:700;background:var(--red);color:#fff;padding:6px;animation:annPulse 1.8s ease-in-out infinite}
.announce .fire{display:inline-block;animation:flame 1.1s ease-in-out infinite}
@keyframes annPulse{0%,100%{background:var(--red)}50%{background:var(--red-dark)}}
@keyframes flame{0%,100%{transform:scale(1) rotate(-4deg);filter:drop-shadow(0 0 0 rgba(255,170,0,0))}50%{transform:scale(1.25) rotate(4deg);filter:drop-shadow(0 0 6px rgba(255,170,0,.9))}}

/* link nổi bật trên thanh tiện ích: đẩy khách về fanpage */
.util-bar a{display:inline-flex;align-items:center;gap:5px}
.hot-fanpage{position:relative;color:var(--red) !important;font-weight:800;padding:3px 10px;border-radius:20px;
  background:linear-gradient(90deg,#fff3d6,#ffe2e6);border:1px solid var(--amber);
  box-shadow:0 0 0 0 rgba(255,170,0,.6);animation:fireGlow 1.4s ease-in-out infinite}
.hot-fanpage:hover{color:#fff !important;background:var(--red)}
@keyframes fireGlow{0%,100%{box-shadow:0 0 0 0 rgba(255,170,0,.55)}50%{box-shadow:0 0 12px 3px rgba(255,140,0,.75)}}
.hot-tel{color:var(--ink);font-weight:700}
.hot-tel:hover{color:var(--red) !important}
.util-bar{display:none;justify-content:space-between;font-size:12px;color:var(--muted);border-bottom:1px solid var(--border);padding:6px 16px}
.util-bar a:hover{color:var(--amber)}
.header-main{display:flex;align-items:center;gap:12px;padding:12px 16px}
.logo{font-weight:900;font-size:27px;color:var(--text);display:flex;align-items:center;gap:12px;white-space:nowrap;text-decoration:none}
.logo i{width:10px;height:40px;background:linear-gradient(var(--amber),var(--pink));border-radius:3px;display:block;flex:0 0 auto}
.logo .lb{display:flex;flex-direction:column;line-height:1.08}
.logo .lb b{font-weight:900}
.logo .lb2{color:#111;font-size:.62em;font-weight:800;margin-top:2px}
.logo span{color:var(--amber)}
.search-box{flex:1 1 33%;max-width:33%;display:none;align-items:center;gap:8px;margin:0 16px;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}
.search-box input{flex:1;background:transparent;border:none;outline:none;color:var(--text);font-size:14px}
.cart-btn{position:relative;font-size:18px;background:transparent;border:none;color:var(--text);cursor:pointer;padding:4px 8px}
.cart-count{position:absolute;top:-4px;right:-2px;background:var(--pink);color:#fff;font-size:10px;font-weight:700;border-radius:999px;min-width:16px;height:16px;display:none;align-items:center;justify-content:center;padding:0 4px}
.cart-count.show{display:flex}
.hamburger{display:block;background:transparent;border:none;color:var(--text);font-size:22px;cursor:pointer;padding:4px 8px}
.main-nav{display:none;gap:24px;border-top:1px solid var(--border);padding:0 16px;position:relative;list-style:none;margin:0}
.main-nav>li{position:relative}
.main-nav>li>a{display:flex;align-items:center;gap:4px;padding:12px 0;font-size:14px;font-weight:600}
.main-nav>li:hover>a{color:var(--amber)}
.main-nav>li:hover .mega{display:grid}
.mega{display:none;position:absolute;left:0;top:100%;background:var(--surface);border-top:1px solid var(--border);box-shadow:var(--sh2);grid-template-columns:repeat(2,1fr);gap:24px 40px;padding:24px 28px;z-index:30;min-width:420px}
.mega .group-title{font-size:11px;text-transform:uppercase;letter-spacing:.14em;font-weight:700;color:var(--muted);margin-bottom:8px}
.mega ul{list-style:none;margin:0;padding:0}
.mega li{margin-bottom:6px;font-size:14px}
.mega li a:hover{color:var(--amber)}
.mobile-drawer{position:fixed;inset:0;z-index:60;display:none}
.mobile-drawer.open{display:block}
.mobile-drawer .backdrop{position:absolute;inset:0;background:rgba(0,0,0,.5)}
.mobile-drawer .panel{position:absolute;left:0;top:0;bottom:0;width:82%;max-width:320px;background:var(--surface);padding:16px;overflow-y:auto}
.mobile-group{border-bottom:1px solid var(--border)}
.mobile-group>button{width:100%;display:flex;justify-content:space-between;padding:12px 0;font-weight:700;background:none;border:none;color:var(--text);cursor:pointer}
.mobile-sub{display:none;padding-bottom:12px}
.mobile-sub.open{display:block}
.mobile-sub a{display:block;padding:5px 0;font-size:14px;color:var(--muted)}

/* ---------- hero ---------- */
.hero{text-align:center;padding:56px 16px;border-bottom:1px solid var(--border);background:
  radial-gradient(circle at 80% -20%,rgba(238,0,51,.12),transparent 55%),var(--bg)}
.hero .container{position:relative;z-index:1}
.hero h1{font-size:34px;margin:12px 0;line-height:1.1}
.hero h1 em{color:var(--amber);font-style:normal}
.hero p{max-width:560px;margin:0 auto 32px;color:var(--muted)}
.hero .nameplate{max-width:640px;margin:0 auto 28px}
.hero .actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.hero-grid{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch;text-align:left}
.hero-grid > *{min-width:0}
.hero-intro{display:flex;flex-direction:column;justify-content:center}
.hero-block{display:flex;flex-direction:column;text-align:left}
.hero-block h3{margin:0 0 4px;font-size:17px}
@media (max-width:1080px){.hero-grid{grid-template-columns:1fr;gap:22px}.hero-intro{justify-content:flex-start}}
@media (max-width:600px){.hero-grid{gap:16px}.hero-grid h1{font-size:30px}.hero-grid p{font-size:15px}.hero-stats{justify-content:flex-start;gap:10px}.hero-stats div{padding:10px 14px}.calc-card,.survey-card{max-width:100%}}
.survey-card{max-width:380px;margin:0 auto;background:linear-gradient(160deg,#fff,#fff6f7);border:1px solid var(--amber)}
.hero-grid h1{font-size:42px;line-height:1.15;margin:0 0 16px;letter-spacing:-1px}
.hero-grid p{margin:0 0 26px;max-width:520px;color:var(--muted);font-size:16.5px}
.hero-grid .actions{justify-content:flex-start}

/* ---------- trust strip ---------- */
.trust-strip{display:flex;flex-wrap:wrap;justify-content:center;gap:32px;padding:20px 16px;border-bottom:1px solid var(--border);background:var(--surface)}
.trust-strip .item{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600}
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.trust div{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.trust .ic{font-size:24px;color:var(--amber);margin-bottom:6px}
.trust b{display:block;margin-bottom:3px;font-size:14.5px}
.trust span{font-size:13px;color:var(--muted)}

/* ---------- sections ---------- */
.section{padding:48px 16px;border-bottom:1px solid var(--border)}
.sec-h{display:flex;align-items:flex-end;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.sec-h h2{font-size:22px}
.sec-h p{margin:4px 0 0;color:var(--muted);font-size:14.5px}
.sec-h .more{margin-left:auto;color:var(--amber);font-weight:700;font-size:14px;white-space:nowrap}
.cta-band{text-align:center;padding:56px 16px}
.cta-band h2{font-size:24px;margin-bottom:12px}
.cta-band p{color:var(--muted);margin-bottom:24px}

/* ---------- product grid / card ---------- */
.grid{display:grid;gap:16px}
.g5{grid-template-columns:repeat(5,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}

/* ---------- nhóm thiết bị thu gọn ---------- */
.prod-groups{display:flex;flex-direction:column;gap:12px;margin-top:8px}
.prod-group{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--surface)}
.pg-head{width:100%;text-align:left;background:var(--surface);border:none;padding:14px 16px;font-size:16px;font-weight:700;color:var(--text);cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.pg-head:hover{background:#fff}
.pg-head .pg-chev{color:var(--amber);font-size:14px;transition:transform .2s}
.pg-head.open .pg-chev{transform:rotate(90deg)}
.prod-group-body{padding:16px}
.prod-group-body[hidden]{display:none}
.product-card{display:block;text-align:left;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--surface);transition:.18s}
.product-card:hover{box-shadow:var(--sh2);transform:translateY(-3px);border-color:var(--amber)}
.product-card .thumb{aspect-ratio:4/3;background:linear-gradient(150deg,#FFFFFF,#ECEFF1);position:relative;display:flex;align-items:center;justify-content:center}
.product-card .thumb .sym{font-size:40px;opacity:.30;color:var(--red)}
.product-card .thumb .badge{position:absolute;top:8px;left:8px}
.product-card .thumb .cap{position:absolute;bottom:8px;left:10px;font-family:var(--mono);font-size:11px;color:var(--ink);background:rgba(255,255,255,.82);padding:2px 7px;border-radius:5px}
.product-card .body{padding:12px}
.product-card .vendor{font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:700}
.product-card .title{font-weight:700;margin:2px 0 8px;font-size:14.5px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.product-card .price-row{display:flex;align-items:baseline;gap:8px;margin-bottom:10px;flex-wrap:wrap}
.price{font-family:var(--mono);font-weight:700;font-size:16px;color:var(--red)}
.price.compare{font-size:12px;color:var(--muted);text-decoration:line-through}
.price-note{font-size:11px;color:var(--muted);font-weight:600;margin-left:4px}
.product-card .card-f{display:flex;gap:7px;padding:0 12px 12px}

/* ---------- category tiles ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.cat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px 18px;text-align:center;transition:.18s}
.cat:hover{border-color:var(--amber);box-shadow:var(--sh);transform:translateY(-3px)}
.cat .ic{font-size:30px;color:var(--amber);margin-bottom:8px}
.cat b{display:block;font-size:15px;margin-bottom:3px}
.cat span{font-size:12.5px;color:var(--muted)}

/* ---------- combo ---------- */
.combo{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.combo:hover{box-shadow:var(--sh2)}
.combo-h{background:linear-gradient(120deg,var(--red),#44494D);color:#fff;padding:18px 20px}
.combo-h .kwp{font-size:29px;font-weight:700;font-family:var(--mono);color:#fff;letter-spacing:-1px}
.combo-h h3{margin:2px 0 0;font-size:15.5px;font-weight:600}
.combo-b{padding:16px 20px;flex:1}
.combo-b li{font-size:13.5px;color:var(--muted);margin-bottom:6px;padding-left:18px;position:relative;list-style:none}
.combo-b li::before{content:"\2713";position:absolute;left:0;color:var(--green);font-weight:700}
.combo-b ul{margin:0;padding:0}
.combo-f{padding:0 20px 18px}

/* ---------- projects ---------- */
.proj{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.proj:hover{box-shadow:var(--sh2)}
.proj-img{aspect-ratio:16/10;background:linear-gradient(140deg,var(--red),#44494D);position:relative;display:flex;align-items:flex-end;padding:16px}
.proj-img::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(115deg,rgba(0,0,0,.08) 0 12px,transparent 12px 26px)}
.proj-img .kwp{position:relative;color:#fff;font-family:var(--mono);font-size:25px;font-weight:700}
.proj-b{padding:14px 16px}
.proj-b h3{margin:0 0 3px;font-size:15.5px}
.proj-b .place{font-size:12.5px;color:var(--muted);margin-bottom:8px}
.proj-b p{margin:8px 0 0;font-size:13.5px;color:var(--muted)}

/* ---------- hero calc card ---------- */
.calc-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:22px;text-align:left;box-shadow:var(--sh2);max-width:380px;margin:0 auto}
.calc-card h3{margin:0 0 4px;font-size:17px}
.calc-out{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:14px;margin-top:14px}
.calc-out .big{font-size:30px;font-weight:700;color:var(--amber);font-family:var(--mono);letter-spacing:-1px}
.hero-stats{display:flex;gap:14px;margin-top:28px;justify-content:center;flex-wrap:wrap}
.hero-stats div{padding:12px 20px;border-radius:14px;background:rgba(255,255,255,.92);box-shadow:0 6px 18px rgba(0,0,0,.18)}
.hero-stats div b{display:block;font-size:26px;font-weight:800;color:var(--amber);font-family:var(--mono);text-shadow:0 2px 12px rgba(245,166,35,.4)}
.hero-stats div span{font-size:12px;color:var(--muted)}

/* ---------- breadcrumb ---------- */
.breadcrumb,.crumb{display:flex;flex-wrap:wrap;gap:6px;font-size:12px;color:var(--muted);margin-bottom:16px}
.breadcrumb a:hover,.crumb a:hover{color:var(--amber)}
.breadcrumb .current{color:var(--text)}

/* ---------- collection layout ---------- */
.collection-head{margin-bottom:24px}
.collection-layout{display:grid;gap:32px}
.layout{display:grid;gap:26px;align-items:start}
.filter-group{margin-bottom:24px}
.filter-group h4{font-size:11px;text-transform:uppercase;letter-spacing:.14em;color:var(--muted);margin:0 0 10px}
.filter-group label{display:flex;gap:8px;align-items:center;font-size:14px;margin-bottom:8px;color:var(--text)}
.filter-group input[type=text],.filter-group input[type=number],.filter-group select{width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:7px;background:var(--surface)}
.side{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.side h4{font-size:12px;font-family:var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}
.side .fgroup{padding-bottom:15px;margin-bottom:15px;border-bottom:1px solid var(--border)}
.side .fgroup:last-child{border:0;margin:0;padding:0}
.bar{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:11px 15px;display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.pager{display:flex;gap:6px;justify-content:center;margin-top:30px;flex-wrap:wrap}
.pager a,.pager span{padding:8px 13px;border:1px solid var(--border);border-radius:8px;background:var(--surface);font-size:14px}
.pager .on{background:var(--amber);color:var(--ink);border-color:var(--amber);font-weight:700}

/* ---------- product detail ---------- */
.product-main{display:grid;gap:40px}
.gallery-main{aspect-ratio:1/1;border:1px solid var(--border);border-radius:var(--radius);background:linear-gradient(150deg,#FFFFFF,#ECEFF1);display:flex;align-items:center;justify-content:center;margin-bottom:12px;overflow:hidden;font-size:96px;color:#C7CDD2}
.gallery-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.gallery-thumbs div{aspect-ratio:1/1;border:1px solid var(--border);border-radius:6px;background:var(--raised)}
.stars{color:var(--amber);margin-bottom:16px;font-size:14px}
.bundle-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:8px}
.bundle-opt{position:relative;text-align:left;border:1px solid var(--border);border-radius:var(--radius);padding:12px;background:var(--surface);display:block;cursor:pointer}
.bundle-opt input{position:absolute;opacity:0}
.bundle-opt.checked{border-color:var(--amber);background:var(--raised)}
.bundle-opt .b-label{font-weight:700;font-size:14px}
.bundle-opt .b-note{font-size:12px;color:var(--muted)}
.qty-add{display:flex;gap:16px;margin-top:24px;align-items:center}
.qty-stepper{display:flex;align-items:center;border:1px solid var(--border);border-radius:var(--radius)}
.qty-stepper button{padding:10px 14px;background:var(--surface);border:none;color:var(--text);cursor:pointer;font-size:17px}
.qty-stepper input{width:48px;text-align:center;background:transparent;border:none;color:var(--text);font-weight:700;font-family:var(--mono)}
.tabs{display:flex;gap:24px;border-top:1px solid var(--border);margin-top:48px;padding-top:16px}
.tab-btn{padding-bottom:8px;font-weight:700;font-size:14px;color:var(--muted);border:none;background:none;cursor:pointer;border-bottom:2px solid transparent}
.tab-btn.active{color:var(--amber);border-color:var(--amber)}
.tab-panel{display:none;padding:24px 0;color:var(--muted);font-size:14px}
.tab-panel.active{display:block}
.spec-table,.spec-tb{width:100%;border-collapse:collapse;font-size:14px}
.spec-table td,.spec-tb td{padding:9px 0;border-bottom:1px solid var(--border)}
.spec-table td:first-child,.spec-tb td:first-child{color:var(--muted)}
.pbox{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;margin:18px 0}
.pbox .now{font-size:34px;font-weight:700;color:var(--red);font-family:var(--mono);letter-spacing:-1.2px}
.pdp{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start}
.pdp-img img{width:100%;border-radius:14px;border:1px solid var(--border);background:#fff;aspect-ratio:4/3;object-fit:cover}
.pdp-thumbs{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.pdp-thumbs img{width:68px;height:68px;object-fit:cover;border:1px solid var(--border);border-radius:9px;cursor:pointer;transition:.15s}
.pdp-thumbs img:hover{border-color:var(--amber)}
.spec-full{margin-top:14px;padding:14px 16px;background:var(--surface);border:1px solid var(--border);border-radius:12px;font-size:14px;line-height:1.6;white-space:pre-line;color:var(--text)}

/* ---------- generic tables / forms ---------- */
table.tb{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden}
table.tb th{background:var(--ink);color:#fff;font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;font-family:var(--mono);padding:12px 14px;text-align:left;font-weight:600}
table.tb td{padding:13px 14px;border-bottom:1px solid var(--border);font-size:14px}
table.tb tr:last-child td{border:0}
.n{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums}
.field{margin-bottom:14px}
.field label{display:block;font-size:12px;font-family:var(--mono);letter-spacing:.07em;text-transform:uppercase;color:var(--muted);margin-bottom:5px}
.field input,.field textarea,.field select{width:100%;padding:11px 13px;border:1px solid var(--border);border-radius:9px;background:var(--surface)}
.field input:focus,.field textarea:focus{border-color:var(--amber);outline:none}
.note{padding:12px 15px;border-radius:9px;font-size:13.5px;line-height:1.6}
.n-info{background:var(--blue-bg);color:#44494D}
.n-warn{background:var(--red-bg);color:var(--red-dark)}
.n-ok{background:var(--green-bg);color:var(--green)}
.n-err{background:rgba(238,0,51,.12);color:var(--red-dark)}
.empty{padding:60px 20px;text-align:center;color:var(--muted)}

/* ---------- footer ---------- */
.site-footer{display:grid;gap:48px;padding:40px 16px;border-top:1px solid var(--border);background:var(--surface)}
.site-footer .col h3,.site-footer h4{font-size:11px;text-transform:uppercase;letter-spacing:.14em;color:var(--muted);margin:0 0 12px}
.site-footer .col ul{list-style:none;margin:0;padding:0}
.site-footer .col li,.site-footer a{font-size:13.5px;margin-bottom:6px;color:var(--muted)}
.site-footer a:hover{color:var(--amber)}
.fbot{margin-top:32px;padding-top:18px;border-top:1px solid var(--border);font-size:12.5px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:var(--muted)}

/* ---------- cart drawer ---------- */
.cart-drawer{position:fixed;inset:0;z-index:70;display:none}
.cart-drawer.open{display:block}
.cart-drawer .backdrop{position:absolute;inset:0;background:rgba(0,0,0,.5)}
.cart-drawer .panel{position:absolute;right:0;top:0;bottom:0;width:100%;max-width:380px;background:var(--surface);display:flex;flex-direction:column}
.cart-drawer .head{display:flex;justify-content:space-between;align-items:center;padding:16px;border-bottom:1px solid var(--border);font-weight:900}
.cart-drawer .items{flex:1;overflow-y:auto;padding:16px}
.cart-line{display:flex;justify-content:space-between;gap:8px;font-size:14px;margin-bottom:12px}
.cart-drawer .foot{padding:16px;border-top:1px solid var(--border)}
.cart-subtotal{display:flex;justify-content:space-between;font-weight:700;margin-bottom:12px}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:13px 22px;border-radius:10px;box-shadow:var(--sh2);z-index:99;font-size:14px;border:1px solid var(--border)}

/* ---------- responsive ---------- */
@media(min-width:768px){
  .util-bar{display:flex}
  .search-box{display:flex}
  .main-nav{display:flex}
  .hamburger{display:none}
  .hero h1{font-size:52px}
  .g4{grid-template-columns:repeat(4,1fr)}
  .g3{grid-template-columns:repeat(3,1fr)}
  .site-footer{grid-template-columns:repeat(4,1fr)}
  .collection-layout{grid-template-columns:240px 1fr}
  .product-main{grid-template-columns:1fr 1fr}
}
@media(max-width:1100px){
  .g5{grid-template-columns:repeat(4,1fr)}
  .cat-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:820px){
  .g5,.g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .collection-layout{grid-template-columns:1fr}
  .side{position:static}
  .pdp{grid-template-columns:1fr}
  .hero h1{font-size:31px}
  .header-main{flex-wrap:wrap}
  .search-box{order:3;width:100%;max-width:none;flex-basis:100%;margin:8px 0 0}
}
@media(max-width:520px){
  .g5,.g4,.g2,.cat-grid,.site-footer{grid-template-columns:1fr}
  .hero-stats{gap:18px;flex-wrap:wrap}
}

/* ===================== Chatbot AI — Chuyên viên AI ===================== */
.chat-fab{position:fixed;right:20px;bottom:20px;z-index:1300;display:flex;align-items:center;gap:8px;
  background:var(--red);color:#fff;border:none;border-radius:30px;padding:12px 18px;font-size:14px;font-weight:700;
  cursor:pointer;box-shadow:0 8px 22px rgba(238,0,51,.35);transition:transform .15s,box-shadow .15s}
.chat-fab:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(238,0,51,.45)}
.chat-fab-ic{font-size:18px}
.chat-panel{position:fixed;right:20px;bottom:84px;width:380px;max-width:calc(100vw - 32px);height:560px;
  max-height:calc(100vh - 110px);background:#fff;border-radius:16px;box-shadow:0 18px 50px rgba(0,0,0,.28);
  overflow:hidden;z-index:1300;opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .18s,transform .18s,visibility .18s}
.chat-panel.open{opacity:1;visibility:visible;transform:translateY(0)}
.chat-card{display:flex;flex-direction:column;height:100%}
.chat-header{display:flex;align-items:center;justify-content:space-between;background:var(--red);color:#fff;
  padding:14px 16px;font-weight:700}
.chat-x{background:rgba(255,255,255,.18);border:none;color:#fff;width:28px;height:28px;border-radius:8px;
  cursor:pointer;font-size:14px;line-height:1}
.chat-x:hover{background:rgba(255,255,255,.32)}
.chat-h-tools{display:flex;gap:6px}
.chat-body{flex:1;padding:14px;overflow-y:auto;display:flex;flex-direction:column;gap:10px;background:var(--bg)}
.message{max-width:84%;padding:9px 13px;border-radius:12px;font-size:13.5px;line-height:1.5;word-wrap:break-word}
.message.user{background:var(--red);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.message.bot{background:#fff;color:var(--text);align-self:flex-start;border:1px solid var(--border);border-bottom-left-radius:4px}
.message.bot a{color:var(--red);font-weight:700;text-decoration:underline}
.chat-footer{display:flex;gap:8px;padding:10px;border-top:1px solid var(--border);background:#fff}
.chat-footer input{flex:1;padding:10px 12px;border:1px solid var(--border);border-radius:8px;outline:none;font-size:14px}
.chat-footer input:focus{border-color:var(--red)}
.chat-footer button{padding:10px 16px;background:var(--red);color:#fff;border:none;border-radius:8px;cursor:pointer;font-weight:700}
.chat-footer button:hover{background:var(--red-dark)}

/* ---------- quản trị / CRM ---------- */
.pbox .big{font-size:26px;font-weight:700;color:var(--ink);font-family:var(--mono);letter-spacing:-.5px;line-height:1.1}
.tile{display:flex;flex-direction:column;gap:6px;padding:16px}
.tile .tiny{margin-top:2px}
.kv{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px dashed var(--border);font-size:14px;text-align:right}
.kv:last-child{border-bottom:0}
.kv>span:first-child{color:var(--muted);text-align:left}
.kv.bb{border-top:2px solid var(--ink);margin-top:6px;padding-top:12px;font-weight:700}
.sep{height:1px;background:var(--border);margin:14px 0}
.nowrap{white-space:nowrap}

/* ---------- popup ưu đãi khảo sát (rớt từ trên xuống) ---------- */
.survey-pop{position:fixed;top:0;left:0;right:0;z-index:120;background:linear-gradient(90deg,var(--red),var(--red-dark));
  color:#fff;transform:translateY(-110%);transition:transform .45s cubic-bezier(.2,.8,.2,1);
  box-shadow:0 8px 24px rgba(0,0,0,.25);padding:14px 16px}
.survey-pop.open{transform:translateY(0)}
.survey-pop .survey-x{position:absolute;top:8px;right:12px;background:none;border:none;color:#fff;font-size:20px;cursor:pointer;opacity:.85}
.survey-pop .survey-x:hover{opacity:1}
.survey-inner{max-width:1100px;margin:0 auto;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.survey-h{font-weight:800;font-size:15.5px;flex:1 1 240px}
.survey-form{display:flex;gap:8px;flex:3 1 480px;flex-wrap:wrap;align-items:center}
.survey-form input{padding:10px 12px;border:1px solid rgba(255,255,255,.5);border-radius:9px;outline:none;font-size:14px;
  background:rgba(255,255,255,.95);color:var(--ink);min-width:120px;flex:1 1 130px}
.survey-form input:focus{border-color:#fff;background:#fff}
.survey-form .btn.sun{background:#fff;color:var(--red);border-color:#fff;font-weight:800;flex:0 0 auto}
.survey-form .btn.sun:hover{background:#ffe9ec}
.lead-ok{font-size:14px;font-weight:700;padding:10px 4px}
.survey-fab{position:fixed;left:18px;bottom:18px;z-index:90;display:inline-flex;align-items:center;gap:8px;
  background:var(--red);color:#fff;border:none;border-radius:30px;padding:13px 18px;font-weight:700;cursor:pointer;
  box-shadow:0 6px 18px rgba(238,0,51,.45);font-size:14px}
.survey-fab:hover{background:var(--red-dark)}
@media (max-width:680px){.survey-h{flex:1 1 100%}.survey-form{flex:1 1 100%}}

/* ---------- Video quảng cáo ---------- */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.video-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.video-wrap{position:relative;width:100%;aspect-ratio:16/9;background:#000}
.video-wrap iframe,.video-wrap video{position:absolute;inset:0;width:100%;height:100%;border:0}
.video-cap{padding:10px 12px;font-weight:600;font-size:14px;line-height:1.4}
@media (max-width:680px){.video-grid{grid-template-columns:1fr}}