/* NEXVA brand site — shared styles */
@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,400;0,500;0,700;0,800;1,800&display=swap');
:root{
  --ink:#0A0E17;--ink2:#121A2B;--card:#141d31;--line:rgba(255,255,255,.10);
  --blue:#1E8FE0;--blue-d:#0B63B6;--cyan:#37D2F0;--orange:#F26522;--orange-d:#D8521A;
  --txt:#1A2433;--soft:#5A6577;--bg:#fff;--bg2:#F4F7FB;--good:#21C17A;
  --grad-blue:linear-gradient(135deg,#1E8FE0,#0B63B6);--grad-org:linear-gradient(135deg,#FF7A33,#D8521A);
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:'Be Vietnam Pro',system-ui,Arial,sans-serif;color:var(--txt);line-height:1.6;background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}a{color:inherit;text-decoration:none}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.15;margin:0 0 .4em;font-weight:800;letter-spacing:-.01em}
h2{font-size:clamp(24px,3.6vw,36px)}.sec{padding:60px 0}.center{text-align:center}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--blue-d)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:800;font-size:15px;padding:13px 24px;border-radius:11px;border:0;cursor:pointer;transition:filter .12s,transform .12s}
.btn:active{transform:translateY(1px)}.btn-org{background:var(--grad-org);color:#fff;box-shadow:0 8px 20px rgba(216,82,26,.32)}
.btn-org:hover{filter:brightness(1.05)}.btn-blue{background:var(--grad-blue);color:#fff}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.25)}
.btn-line{background:#fff;color:var(--blue-d);border:2px solid var(--blue)}
/* Header */
header.site{position:sticky;top:0;z-index:60;background:rgba(10,14,23,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:18px;height:64px}
.nav img{height:30px}.nav .menu{display:flex;gap:20px;margin-left:14px}
.nav .menu a{color:#cfe0f0;font-weight:600;font-size:14.5px}.nav .menu a:hover{color:#fff}
.nav .sp{flex:1}.nav .ic{color:#cfe0f0;cursor:pointer;font-size:20px;position:relative}
.nav .cartn{position:absolute;top:-8px;right:-10px;background:var(--orange);color:#fff;font-size:10px;font-weight:800;min-width:16px;height:16px;border-radius:9px;display:grid;place-items:center;padding:0 4px}
.burger{display:none;color:#fff;font-size:24px;cursor:pointer}
@media(max-width:820px){.nav .menu{display:none;position:absolute;top:64px;left:0;right:0;background:var(--ink);flex-direction:column;padding:10px 20px;border-bottom:1px solid var(--line)}.nav .menu.open{display:flex}.burger{display:block}}
/* Hero */
.hero{position:relative;background:var(--ink);color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(1100px 500px at 78% 12%,rgba(30,143,224,.30),transparent 60%),radial-gradient(700px 400px at 10% 90%,rgba(242,101,34,.16),transparent 60%)}
.hero .grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:30px;align-items:center;padding:56px 0 60px}
.hero h1{font-size:clamp(30px,5vw,50px)}.hero .lead{font-size:clamp(16px,2vw,19px);color:#c7d6e8;max-width:34ch;margin:.2em 0 1.3em}
.hero .img{border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.14);box-shadow:0 30px 70px rgba(0,0,0,.45)}
.hero .img img{width:100%;height:100%;object-fit:cover}
.badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.badge{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;color:#dbe8f5;background:rgba(255,255,255,.07);border:1px solid var(--line);padding:7px 13px;border-radius:999px}
.badge b{color:var(--cyan)}
@media(max-width:840px){.hero .grid{grid-template-columns:1fr;padding:36px 0 44px}.hero .img{order:-1}}
/* USP */
.cards4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:880px){.cards4{grid-template-columns:repeat(2,1fr)}}@media(max-width:500px){.cards4{grid-template-columns:1fr}}
.ucard{background:#fff;border:1px solid #e7edf4;border-radius:14px;padding:22px}
.ucard .ic{width:46px;height:46px;border-radius:12px;background:var(--grad-blue);display:grid;place-items:center;font-size:22px;margin-bottom:13px}
.ucard h3{font-size:16px;margin-bottom:.3em}.ucard p{color:var(--soft);font-size:14px;margin:0}
/* Products */
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:900px){.pgrid{grid-template-columns:repeat(2,1fr)}}@media(max-width:520px){.pgrid{grid-template-columns:1fr}}
.pcard{background:#fff;border:1px solid #e7edf4;border-radius:16px;overflow:hidden;display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s}
.pcard:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(11,99,182,.12)}
.pcard .ph{aspect-ratio:1;background:#0b1220 center/cover;position:relative}
.pcard .body{padding:16px;display:flex;flex-direction:column;flex:1}
.pcard h3{font-size:16px;margin:0 0 4px}.pcard .vol{font-size:12.5px;color:var(--soft)}
.pcard .price{font-size:20px;font-weight:800;color:var(--orange-d);margin:8px 0 12px}
.pcard .btn{width:100%;margin-top:auto}
.pcard.soon{opacity:.85}.pcard.soon .ph::after{content:"Sắp ra mắt";position:absolute;inset:0;background:rgba(10,14,23,.55);color:#fff;display:grid;place-items:center;font-weight:800;letter-spacing:.05em}
.tagbest{position:absolute;top:10px;left:10px;background:var(--grad-org);color:#fff;font-size:11px;font-weight:800;padding:4px 10px;border-radius:999px;z-index:2}
/* Tech / verify (dark) */
.dark{background:var(--ink);color:#fff}.dark h2{color:#fff}
.dark .muted{color:#9fb6cd}
.twocol{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:26px}
@media(max-width:760px){.twocol{grid-template-columns:1fr}}
.block{background:var(--ink2);border:1px solid var(--line);border-radius:14px;padding:22px}
.block h3{color:var(--cyan);font-size:17px}
.block p{color:#cdddec;font-size:14.5px;margin:0}
/* Section helpers */
.lead-sub{text-align:center;color:var(--soft);max-width:60ch;margin:0 auto 6px}
.note-soft{font-size:12.5px;color:var(--soft)}
.placeholder{border:1px dashed #c7d4e3;border-radius:14px;padding:30px;text-align:center;color:var(--soft);background:var(--bg2)}
/* Footer */
footer.site{background:var(--ink);color:#9fb6cd;padding:40px 0 30px;font-size:14px}
footer.site .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}
@media(max-width:760px){footer.site .cols{grid-template-columns:1fr}}
footer.site img{height:30px;margin-bottom:12px}footer.site a{color:#cfe3f5}
footer.site h4{color:#fff;font-size:14px;margin:0 0 10px}
footer.site .soc{display:flex;gap:10px;margin-top:10px}
footer.site .soc a{width:34px;height:34px;border-radius:9px;background:rgba(255,255,255,.08);display:grid;place-items:center}
.legalbar{border-top:1px solid var(--line);margin-top:24px;padding-top:16px;font-size:12.5px;color:#6b7e93;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
/* Cart drawer */
.cart-mask{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:70;display:none}
.cart-mask.open{display:block}
.cart{position:fixed;top:0;right:-420px;width:380px;max-width:92vw;height:100%;background:#fff;z-index:71;transition:right .25s;display:flex;flex-direction:column;box-shadow:-10px 0 40px rgba(0,0,0,.3)}
.cart.open{right:0}
.cart .ch{padding:18px;border-bottom:1px solid #eee;display:flex;justify-content:space-between;align-items:center;font-weight:800}
.cart .items{flex:1;overflow:auto;padding:12px 18px}
.cart .it{display:flex;gap:10px;align-items:center;padding:10px 0;border-bottom:1px solid #f0f0f0}
.cart .it .qn{display:flex;align-items:center;gap:6px}.cart .it button{width:26px;height:26px;border:1px solid #ddd;background:#fff;border-radius:7px;cursor:pointer;font-weight:800}
.cart .foot{padding:18px;border-top:1px solid #eee}
.cart .tot{display:flex;justify-content:space-between;font-weight:800;font-size:18px;margin-bottom:12px}
.field{margin-bottom:11px}.field label{display:block;font-weight:700;font-size:13px;margin-bottom:5px}
.field input,.field textarea{width:100%;padding:11px 12px;border:1.5px solid #d8e1ec;border-radius:9px;font:inherit;font-size:14px}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue)}
.okmsg{display:none;background:#e9f8ef;border:1px solid #b6e6c8;color:#1c7a45;border-radius:10px;padding:13px;font-weight:600;margin-top:10px}
.float{position:fixed;right:14px;bottom:14px;z-index:50;display:flex;flex-direction:column;gap:10px}
.float a{width:50px;height:50px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:800;font-size:12px;box-shadow:0 8px 20px rgba(0,0,0,.25)}
.float .zalo{background:#0068FF}.float .mess{background:#0866FF}.float .call{background:#16b35a}