/* ============================================================
   NEXA BEYOND — Design System
   Aesthetic: "Precision Optics" — bright, scientific, vibrant
   Brand: emerald green + royal blue (from the orbiting-planet logo)
   ============================================================ */

/* ---------- Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700;800&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans+Thai:wght@400;500;600;700&display=swap');

/* ---------- Tokens ---------- */
:root{
  --green:#159C63;
  --green-bright:#31C98A;
  --green-soft:#E3F6EC;
  --blue:#1E44C4;
  --blue-deep:#122A82;
  --azure:#2E6BF0;
  --blue-soft:#E5ECFF;

  --ink:#0C1E30;
  --ink-2:#20364a;
  --muted:#5c6f7e;
  --faint:#8a99a6;

  --bg:#F2F6F3;
  --bg-2:#EAF1EC;
  --surface:#ffffff;
  --line:rgba(12,30,48,.10);
  --line-2:rgba(12,30,48,.06);

  --brand-grad:linear-gradient(118deg,var(--green) 0%,var(--azure) 55%,var(--blue) 100%);
  --brand-grad-soft:linear-gradient(118deg,#eafaf1 0%,#eaf0ff 100%);

  --shadow-sm:0 1px 2px rgba(12,30,48,.06),0 2px 8px rgba(12,30,48,.05);
  --shadow-md:0 8px 24px -8px rgba(12,30,48,.16),0 2px 8px rgba(12,30,48,.06);
  --shadow-lg:0 30px 60px -20px rgba(18,42,130,.28);

  --r-sm:10px; --r:16px; --r-lg:24px; --r-xl:34px;
  --maxw:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);

  --font-display:'Sora','IBM Plex Sans Thai',system-ui,sans-serif;
  --font-body:'IBM Plex Sans','IBM Plex Sans Thai',system-ui,sans-serif;
  --font-mono:'IBM Plex Mono','IBM Plex Sans Thai',ui-monospace,monospace;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  font-size:17px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul{list-style:none}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.1;font-weight:700;letter-spacing:-.02em;color:var(--ink)}

/* ---------- Layout ---------- */
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:24px}
.section{padding:96px 0}
.section-sm{padding:64px 0}
section{position:relative}

/* reticle backdrop utility */
.reticle{
  background-image:
    linear-gradient(var(--line-2) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
  background-size:52px 52px;
}

/* ---------- Kicker / eyebrow ---------- */
.kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:12.5px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--green);
  margin-bottom:18px;
}
.kicker::before{content:"";width:26px;height:2px;background:var(--brand-grad);border-radius:2px}
.kicker.center{justify-content:center}

.section-head{max-width:640px;margin-bottom:52px}
.section-head.center{margin-inline:auto;text-align:center}
.section-head h2{font-size:clamp(30px,4vw,44px);margin-bottom:16px}
.section-head p{color:var(--muted);font-size:18px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-display);font-weight:600;font-size:15px;
  padding:14px 26px;border-radius:100px;transition:.3s var(--ease);
  white-space:nowrap;
}
.btn svg{width:17px;height:17px;transition:transform .3s var(--ease)}
.btn-primary{background:var(--brand-grad);color:#fff;box-shadow:0 10px 24px -10px rgba(30,68,196,.6)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px -10px rgba(30,68,196,.65)}
.btn-primary:hover svg{transform:translateX(4px)}
.btn-ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{border-color:var(--green);color:var(--green);transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.28);backdrop-filter:blur(6px)}
.btn-light:hover{background:rgba(255,255,255,.24)}

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(242,246,243,.82);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid transparent;
  transition:.3s var(--ease);
}
.site-header.scrolled{
  background:rgba(255,255,255,.9);
  border-bottom-color:var(--line);
  box-shadow:0 4px 20px -12px rgba(12,30,48,.3);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:-.02em}
.brand img{height:40px;width:auto}
.brand .bmark{display:flex;flex-direction:column;line-height:1}
.brand .bmark b{color:var(--blue);font-weight:800}
.brand .bmark span{font-size:9.5px;letter-spacing:.28em;color:var(--green);font-family:var(--font-mono);font-weight:500;margin-top:3px}

.nav-links{display:flex;align-items:center;gap:4px}
.nav-links > li > a{
  display:flex;align-items:center;gap:6px;
  font-family:var(--font-display);font-weight:500;font-size:14.5px;
  padding:10px 15px;border-radius:100px;color:var(--ink-2);transition:.2s;
}
.nav-links > li > a:hover{color:var(--blue);background:var(--blue-soft)}
.nav-links a.active{color:var(--blue)}
.has-mega{position:relative}
.has-mega > a svg{width:13px;height:13px;transition:transform .3s}
.has-mega:hover > a svg{transform:rotate(180deg)}

/* mega menu */
.mega{
  position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(8px);
  width:min(720px,92vw);background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--shadow-lg);padding:20px;
  display:grid;grid-template-columns:1fr 1fr;gap:6px;
  opacity:0;visibility:hidden;transition:.28s var(--ease);
}
.has-mega:hover .mega{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.mega-item{display:flex;gap:14px;padding:13px;border-radius:var(--r);transition:.2s}
.mega-item:hover{background:var(--bg)}
.mega-ic{
  flex:none;width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
  background:var(--brand-grad-soft);color:var(--green);
}
.mega-ic svg{width:21px;height:21px}
.mega-item:hover .mega-ic{background:var(--brand-grad);color:#fff}
.mega-item h5{font-family:var(--font-display);font-size:14.5px;font-weight:600;margin-bottom:2px}
.mega-item p{font-size:12.5px;color:var(--muted);line-height:1.4}

.nav-cta{display:flex;align-items:center;gap:14px}
.nav-cta .btn{padding:11px 22px}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}

/* mobile menu hidden on desktop, shown via media query */
.mobile-menu,.mobile-overlay{display:none}

/* ============================================================
   HERO
   ============================================================ */
.hero{position:relative;overflow:hidden;padding:70px 0 90px}
.hero-orbits{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.orbit-ring{
  position:absolute;border-radius:50%;border:1.5px solid;
  border-color:rgba(30,68,196,.13);
}
.orbit-ring.o1{width:620px;height:620px;top:-160px;right:-120px;border-color:rgba(21,156,99,.16)}
.orbit-ring.o2{width:900px;height:900px;top:-300px;right:-260px}
.orbit-ring.o3{width:420px;height:420px;top:-40px;right:40px;border-style:dashed;border-color:rgba(46,107,240,.18)}
.hero-glow{
  position:absolute;width:560px;height:560px;border-radius:50%;filter:blur(80px);opacity:.5;z-index:0;
}
.hero-glow.g1{background:radial-gradient(circle,rgba(49,201,138,.45),transparent 70%);top:-120px;right:60px}
.hero-glow.g2{background:radial-gradient(circle,rgba(46,107,240,.35),transparent 70%);bottom:-160px;left:-80px}

.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;position:relative;z-index:1}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;background:var(--surface);
  border:1px solid var(--line);border-radius:100px;padding:7px 15px 7px 8px;
  font-size:13px;font-weight:500;color:var(--ink-2);box-shadow:var(--shadow-sm);margin-bottom:26px;
}
.hero-badge b{background:var(--brand-grad);color:#fff;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.08em;padding:3px 9px;border-radius:100px;font-weight:600}
.hero h1{font-size:clamp(38px,5.6vw,66px);font-weight:800;line-height:1.02;margin-bottom:22px}
.hero h1 .grad{background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-lead{font-size:19px;color:var(--muted);max-width:520px;margin-bottom:34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap}
.hero-stat b{display:block;font-family:var(--font-display);font-size:30px;font-weight:700;background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-stat span{font-size:13px;color:var(--muted);font-family:var(--font-mono)}

/* hero slider */
.hero-slider{position:relative}
.hero-slide{display:none}
.hero-slide.active{display:block;animation:heroFade .7s var(--ease)}
@keyframes heroFade{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.hero-controls{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:36px}
.hero-dots{display:flex;gap:9px}
.hero-dots button{width:30px;height:5px;border-radius:100px;background:var(--line);transition:.35s var(--ease);cursor:pointer;padding:0;border:none}
.hero-dots button.active{background:var(--brand-grad);width:46px}
.hero-nav{display:flex;gap:10px}
.hero-nav button{width:46px;height:46px;border-radius:50%;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-sm);display:grid;place-items:center;color:var(--ink);transition:.25s var(--ease);cursor:pointer}
.hero-nav button:hover{background:var(--brand-grad);color:#fff;border-color:transparent;transform:translateY(-2px)}
.hero-nav button svg{width:19px;height:19px}

/* hero visual */
.hero-visual{position:relative;aspect-ratio:1/1}
.hero-card{
  position:absolute;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--shadow-lg);overflow:hidden;
}
.hero-card.main{inset:0;z-index:1}
.hero-card.main img{width:100%;height:100%;object-fit:cover}
.hero-card .tag{
  position:absolute;left:16px;bottom:16px;z-index:2;background:rgba(12,30,48,.72);
  backdrop-filter:blur(8px);color:#fff;padding:8px 14px;border-radius:100px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;
}
.hero-float{
  position:absolute;z-index:3;background:var(--surface);border:1px solid var(--line);
  border-radius:16px;box-shadow:var(--shadow-md);padding:14px 16px;display:flex;align-items:center;gap:12px;
}
.hero-float.f1{top:22px;left:-32px;animation:float1 6s ease-in-out infinite}
.hero-float.f2{bottom:40px;right:-30px;animation:float1 6s ease-in-out infinite .8s}
.hero-float .fic{width:38px;height:38px;border-radius:10px;background:var(--green-soft);color:var(--green);display:grid;place-items:center}
.hero-float .fic.blue{background:var(--blue-soft);color:var(--blue)}
.hero-float .fic svg{width:20px;height:20px}
.hero-float b{font-family:var(--font-display);font-size:14px;display:block}
.hero-float span{font-size:11.5px;color:var(--muted);font-family:var(--font-mono)}
@keyframes float1{50%{transform:translateY(-14px)}}

/* ---------- Marquee (trust bar) ---------- */
.trust{border-block:1px solid var(--line);background:var(--surface);padding:22px 0;overflow:hidden}
.trust-inner{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:center}
.trust-label{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}
.trust-brands{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.trust-brands span{font-family:var(--font-display);font-weight:600;color:var(--ink-2);font-size:15px;padding:6px 16px;border:1px solid var(--line);border-radius:100px}

/* ============================================================
   PRODUCT / CATEGORY CARDS
   ============================================================ */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cat-grid.cols-4{grid-template-columns:repeat(4,1fr);gap:20px}
.cat-grid.cols-3{grid-template-columns:repeat(3,1fr)}
.cat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;transition:.35s var(--ease);position:relative;display:flex;flex-direction:column;
}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.cat-media{aspect-ratio:16/11;overflow:hidden;position:relative;background:var(--bg-2)}
.cat-media img{width:100%;height:100%;object-fit:cover;transition:.6s var(--ease)}
.cat-media.contain{background:#fff}
.cat-media.contain img{object-fit:contain;padding:14px}
.cat-card:hover .cat-media img{transform:scale(1.06)}
.cat-media .num{
  position:absolute;top:14px;left:14px;font-family:var(--font-mono);font-size:11px;
  background:rgba(255,255,255,.9);padding:4px 10px;border-radius:100px;color:var(--blue);font-weight:600;
}
.cat-body{padding:24px;flex:1;display:flex;flex-direction:column}
.cat-body h3{font-size:20px;margin-bottom:9px}
.cat-body p{font-size:14.5px;color:var(--muted);flex:1;margin-bottom:16px}
.cat-link{display:inline-flex;align-items:center;gap:7px;font-family:var(--font-display);font-weight:600;font-size:14px;color:var(--blue)}
.cat-link svg{width:15px;height:15px;transition:transform .3s}
.cat-card:hover .cat-link svg{transform:translateX(4px)}
.cat-tags{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.cat-tags span{font-family:var(--font-mono);font-size:10.5px;background:var(--bg);border:1px solid var(--line);padding:3px 9px;border-radius:100px;color:var(--ink-2)}

/* featured main-product banner (full width, 2:1) */
.main-banner{position:relative;display:block;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-md);background:#eaf0ff;transition:.35s var(--ease)}
.main-banner:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:transparent}
.main-banner img{width:100%;aspect-ratio:2/1;object-fit:cover;display:block;transition:.6s var(--ease)}
.main-banner:hover img{transform:scale(1.02)}
.main-banner .featured-tag{position:absolute;top:16px;left:16px;z-index:2;display:inline-flex;align-items:center;gap:7px;font-family:var(--font-mono);font-size:11.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:#fff;background:var(--brand-grad);padding:6px 13px;border-radius:100px;box-shadow:0 6px 16px -6px rgba(30,68,196,.6)}

/* category banner tiles (original per-category banners, 2:1) */
.banner-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.banner-card{position:relative;display:block;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-sm);background:#fff;transition:.35s var(--ease)}
.banner-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.banner-card img{width:100%;aspect-ratio:2/1;object-fit:cover;display:block;transition:.6s var(--ease)}
.banner-card:hover img{transform:scale(1.03)}
.banner-card .bc-go,.main-banner .bc-go{position:absolute;right:16px;bottom:16px;width:44px;height:44px;border-radius:50%;background:var(--brand-grad);color:#fff;display:grid;place-items:center;opacity:0;transform:translateY(8px);transition:.35s var(--ease);box-shadow:0 10px 24px -8px rgba(30,68,196,.6)}
.banner-card:hover .bc-go,.main-banner:hover .bc-go{opacity:1;transform:none}
.banner-card .bc-go svg,.main-banner .bc-go svg{width:20px;height:20px}
@media(max-width:760px){.banner-grid{grid-template-columns:1fr}}

/* ============================================================
   FEATURE / SPLIT SECTIONS
   ============================================================ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.split.rev .split-media{order:2}
.split-media{border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-md);border:1px solid var(--line);position:relative}
.split-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.split-body h2{font-size:clamp(26px,3.4vw,38px);margin-bottom:18px}
.split-body p{color:var(--muted);margin-bottom:16px}
.feat-list{display:flex;flex-direction:column;gap:14px;margin:24px 0}
.feat-list li{display:flex;gap:13px;align-items:flex-start}
.feat-list .fi{flex:none;width:28px;height:28px;border-radius:8px;background:var(--green-soft);color:var(--green);display:grid;place-items:center;margin-top:1px}
.feat-list .fi svg{width:16px;height:16px}
.feat-list b{font-family:var(--font-display);font-weight:600;font-size:15.5px;display:block}
.feat-list span{font-size:14px;color:var(--muted)}

/* ============================================================
   PRODUCT DETAIL (spec) blocks
   ============================================================ */
.page-hero{padding:56px 0 44px;position:relative;overflow:hidden}
.page-hero .wrap{position:relative;z-index:1}
.crumbs{display:flex;gap:8px;align-items:center;font-family:var(--font-mono);font-size:12.5px;color:var(--muted);margin-bottom:22px}
.crumbs a:hover{color:var(--blue)}
.crumbs .sep{color:var(--faint)}
.page-hero h1{font-size:clamp(34px,5vw,54px);font-weight:800;margin-bottom:16px;max-width:760px}
.page-hero .lead{font-size:19px;color:var(--muted);max-width:640px}
.page-hero .pill{display:inline-block;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--green);background:var(--green-soft);padding:6px 14px;border-radius:100px;margin-bottom:18px}

.prod{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:40px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);box-shadow:var(--shadow-sm)}
.prod.rev .prod-media{order:2}
.prod + .prod{margin-top:28px}
.prod-media{border-radius:var(--r-lg);overflow:hidden;background:var(--bg-2);aspect-ratio:4/3;border:1px solid var(--line-2)}
.prod-media img{width:100%;height:100%;object-fit:cover}
.prod-media.contain img{object-fit:contain;padding:20px}
.prod-name{font-size:clamp(24px,3vw,32px);margin-bottom:6px}
.prod-series{font-family:var(--font-mono);font-size:13px;color:var(--green);letter-spacing:.08em;margin-bottom:16px}
.prod-desc{color:var(--muted);margin-bottom:22px}
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-bottom:8px}
.spec-grid.full{grid-template-columns:1fr}
.spec-cell{background:var(--surface);padding:14px 16px}
.spec-cell .k{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--faint);margin-bottom:4px}
.spec-cell .v{font-family:var(--font-display);font-weight:600;font-size:16px;color:var(--ink)}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.chip{font-family:var(--font-mono);font-size:12px;background:var(--bg);border:1px solid var(--line);border-radius:100px;padding:6px 13px}
.chip.g{background:var(--green-soft);border-color:transparent;color:var(--green)}
.chip.b{background:var(--blue-soft);border-color:transparent;color:var(--blue)}

/* gradient placeholder media (models without a photo) */
.media-ph{display:grid;place-items:center;position:relative;overflow:hidden;background:var(--ink);border-radius:var(--r-lg);aspect-ratio:4/3;border:1px solid var(--line-2)}
.media-ph::before{content:"";position:absolute;inset:0;background:var(--brand-grad);opacity:.92}
.media-ph::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.09) 1px,transparent 1px);background-size:34px 34px}
.media-ph .ph-in{position:relative;z-index:1;text-align:center;color:#fff;padding:20px}
.media-ph .ph-in svg{width:52px;height:52px;margin-bottom:14px;opacity:.9}
.media-ph .ph-in b{display:block;font-family:var(--font-display);font-size:30px;font-weight:800;letter-spacing:-.02em}
.media-ph .ph-in span{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;opacity:.85}

/* section label divider */
.sec-label{display:flex;align-items:center;gap:18px;margin:8px 0 34px}
.sec-label h3{font-size:clamp(22px,3vw,30px);white-space:nowrap}
.sec-label .ln{flex:1;height:1px;background:var(--line)}
.sec-label .tag{font-family:var(--font-mono);font-size:12px;color:var(--green);background:var(--green-soft);padding:5px 13px;border-radius:100px;white-space:nowrap}

/* application mini cards */
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.app-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:22px;transition:.3s var(--ease)}
.app-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:transparent}
.app-card .ac-mono{font-family:var(--font-mono);font-size:12px;color:var(--blue);margin-bottom:10px;display:inline-block;background:var(--blue-soft);padding:4px 10px;border-radius:100px}
.app-card h4{font-size:17px;margin-bottom:8px}
.app-card p{font-size:14px;color:var(--muted)}
@media(max-width:900px){.app-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.app-grid{grid-template-columns:1fr}}

/* feature quad */
.quad{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.qcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px 22px;transition:.3s var(--ease)}
.qcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.qcard .qic{width:46px;height:46px;border-radius:12px;background:var(--brand-grad-soft);color:var(--green);display:grid;place-items:center;margin-bottom:16px}
.qcard .qic svg{width:24px;height:24px}
.qcard h4{font-size:17px;margin-bottom:8px}
.qcard p{font-size:14px;color:var(--muted)}

/* spec table (thermal) */
.spectable{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;font-size:14.5px}
.spectable th,.spectable td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line)}
.spectable thead th{background:var(--ink);color:#fff;font-family:var(--font-display);font-weight:600;font-size:14px}
.spectable tbody th{font-family:var(--font-mono);font-weight:500;color:var(--ink-2);font-size:13px;background:var(--bg)}
.spectable td{font-family:var(--font-mono);color:var(--muted)}
.spectable tr:last-child th,.spectable tr:last-child td{border-bottom:none}
.table-scroll{overflow-x:auto;border-radius:var(--r);box-shadow:var(--shadow-sm)}

/* ============================================================
   GALLERY
   ============================================================ */
.gal-tabs{display:flex;gap:10px;justify-content:center;margin-bottom:40px;flex-wrap:wrap}
.gal-tab{font-family:var(--font-display);font-weight:600;font-size:14px;padding:11px 22px;border-radius:100px;border:1px solid var(--line);background:var(--surface);color:var(--ink-2);transition:.25s}
.gal-tab.active{background:var(--brand-grad);color:#fff;border-color:transparent}
.gal-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.gal-item{border-radius:var(--r);overflow:hidden;position:relative;aspect-ratio:1/1;border:1px solid var(--line);background:var(--bg-2);cursor:pointer;box-shadow:var(--shadow-sm)}
.gal-item img{width:100%;height:100%;object-fit:cover;transition:.5s var(--ease)}
.gal-item:hover img{transform:scale(1.08)}
.gal-cap{
  position:absolute;inset:0;display:flex;align-items:flex-end;padding:16px;
  background:linear-gradient(transparent 55%,rgba(12,30,48,.82));opacity:0;transition:.3s;
}
.gal-item:hover .gal-cap{opacity:1}
.gal-cap b{font-family:var(--font-display);color:#fff;font-size:15px}
.gal-cap span{font-family:var(--font-mono);color:var(--green-bright);font-size:12px;display:block}
.gal-group{margin-bottom:20px}
.gal-group.hidden{display:none}
/* placeholder micrograph tiles */
.gal-item.ph{display:grid;place-items:center;text-align:center;padding:16px;cursor:default}
.gal-item.ph::before{content:"";position:absolute;inset:0;background:var(--brand-grad);opacity:.9}
.gal-item.ph.alt::before{background:linear-gradient(140deg,var(--azure),var(--green))}
.gal-item.ph.alt2::before{background:linear-gradient(140deg,var(--blue-deep),var(--green))}
.gal-item.ph .phc{position:relative;z-index:1;color:#fff}
.gal-item.ph .phc svg{width:30px;height:30px;opacity:.85;margin-bottom:10px}
.gal-item.ph .phc b{display:block;font-family:var(--font-display);font-size:15px;font-weight:600;line-height:1.2}
.gal-item.ph .phc span{font-family:var(--font-mono);font-size:12px;opacity:.9;letter-spacing:.08em}
.gal-item.ph::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.14) 1px,transparent 1px);background-size:14px 14px;z-index:0}
.gal-group-title{display:flex;align-items:center;gap:14px;margin-bottom:24px}
.gal-group-title h3{font-size:24px}
.gal-group-title .ln{flex:1;height:1px;background:var(--line)}

/* ============================================================
   ABOUT
   ============================================================ */
.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.value-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px;transition:.3s}
.value-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
.value-card .vic{width:52px;height:52px;border-radius:14px;background:var(--brand-grad);color:#fff;display:grid;place-items:center;margin-bottom:20px}
.value-card .vic svg{width:26px;height:26px}
.value-card h3{font-size:20px;margin-bottom:10px}
.value-card p{color:var(--muted);font-size:15px}
.big-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.big-stat{text-align:center;padding:32px 20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg)}
.big-stat b{font-family:var(--font-display);font-size:44px;font-weight:800;background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:block;line-height:1}
.big-stat span{font-size:14px;color:var(--muted);margin-top:8px;display:block}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:start}
.contact-info{background:var(--ink);color:#fff;border-radius:var(--r-xl);padding:44px;position:relative;overflow:hidden}
.contact-info::before{content:"";position:absolute;width:340px;height:340px;border-radius:50%;background:var(--brand-grad);opacity:.4;filter:blur(70px);top:-120px;right:-120px}
.contact-info h2{color:#fff;font-size:30px;margin-bottom:14px;position:relative}
.contact-info > p{color:rgba(255,255,255,.72);margin-bottom:34px;position:relative}
.cinfo-item{display:flex;gap:16px;align-items:flex-start;margin-bottom:24px;position:relative}
.cinfo-item .cic{flex:none;width:46px;height:46px;border-radius:12px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);display:grid;place-items:center;color:var(--green-bright)}
.cinfo-item .cic svg{width:22px;height:22px}
.cinfo-item .k{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:rgba(255,255,255,.55);margin-bottom:3px}
.cinfo-item .v{font-family:var(--font-display);font-weight:500;font-size:16px;color:#fff}
.cinfo-item a.v:hover{color:var(--green-bright)}
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);padding:40px;box-shadow:var(--shadow-sm)}
.field{margin-bottom:20px}
.field label{display:block;font-family:var(--font-display);font-weight:500;font-size:14px;margin-bottom:8px}
.field label .req{color:var(--green)}
.field input,.field select,.field textarea{
  width:100%;font-family:var(--font-body);font-size:15px;color:var(--ink);
  background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:13px 15px;transition:.2s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--green);background:var(--surface);box-shadow:0 0 0 4px var(--green-soft)}
.field textarea{resize:vertical;min-height:120px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.check{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:var(--muted);margin-bottom:22px}
.check input{width:18px;height:18px;margin-top:2px;accent-color:var(--green);flex:none}
.check a{color:var(--blue);font-weight:500}
.form-note{margin-top:16px;font-size:13px;color:var(--faint);text-align:center;font-family:var(--font-mono)}
.form-success{display:none;text-align:center;padding:30px}
.form-success.show{display:block}
.form-success .sic{width:64px;height:64px;border-radius:50%;background:var(--green-soft);color:var(--green);display:grid;place-items:center;margin:0 auto 18px}
.form-success .sic svg{width:34px;height:34px}
.form-success h3{font-size:24px;margin-bottom:10px}
.form-success p{color:var(--muted)}

.map-embed{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);height:100%;min-height:280px;filter:saturate(1.05)}
.map-embed iframe{width:100%;height:100%;border:0;display:block}

/* ============================================================
   BLOG
   ============================================================ */
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.blog-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;transition:.35s var(--ease);display:flex;flex-direction:column}
.blog-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.blog-media{aspect-ratio:16/10;overflow:hidden;background:var(--bg-2)}
.blog-media img{width:100%;height:100%;object-fit:cover;transition:.6s var(--ease)}
.blog-card:hover .blog-media img{transform:scale(1.05)}
.blog-body{padding:24px;flex:1;display:flex;flex-direction:column}
.blog-meta{display:flex;gap:10px;align-items:center;font-family:var(--font-mono);font-size:12px;color:var(--muted);margin-bottom:12px}
.blog-meta .cat{color:var(--green);font-weight:600}
.blog-body h3{font-size:19px;margin-bottom:10px;flex:1}
.blog-body h3 a:hover{color:var(--blue)}
.blog-read{font-family:var(--font-display);font-weight:600;font-size:13.5px;color:var(--blue);display:inline-flex;gap:6px;align-items:center}

/* ============================================================
   CTA BANNER
   ============================================================ */
.cta-band{position:relative;overflow:hidden;background:var(--ink);border-radius:var(--r-xl);padding:64px;text-align:center;color:#fff}
.cta-band::before{content:"";position:absolute;inset:0;background:var(--brand-grad);opacity:.9;z-index:0}
.cta-band::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:44px 44px;z-index:1;opacity:.6}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{color:#fff;font-size:clamp(28px,4vw,42px);margin-bottom:16px}
.cta-band p{color:rgba(255,255,255,.9);font-size:18px;max-width:560px;margin:0 auto 30px}
.cta-band .btn-light{background:#fff;color:var(--blue);border:none}
.cta-band .btn-light:hover{transform:translateY(-2px);box-shadow:0 14px 30px -10px rgba(0,0,0,.4)}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 30px;position:relative}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:48px}
.foot-brand .brand{color:#fff;margin-bottom:18px}
.foot-brand .brand .bmark b{color:#fff}
.foot-brand p{font-size:14.5px;max-width:280px;margin-bottom:20px}
.foot-social{display:flex;gap:10px}
.foot-social a{width:40px;height:40px;border-radius:11px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);display:grid;place-items:center;color:#fff;transition:.25s}
.foot-social a:hover{background:var(--brand-grad);border-color:transparent;transform:translateY(-3px)}
.foot-social a svg{width:19px;height:19px}
.foot-col h5{font-family:var(--font-display);color:#fff;font-size:14px;letter-spacing:.02em;margin-bottom:18px;text-transform:uppercase;font-size:12.5px;letter-spacing:.12em;font-family:var(--font-mono);color:var(--green-bright)}
.foot-col ul{display:flex;flex-direction:column;gap:11px}
.foot-col a{font-size:14.5px;transition:.2s}
.foot-col a:hover{color:#fff;padding-left:4px}
.foot-contact li{display:flex;gap:11px;align-items:flex-start;font-size:14px;margin-bottom:14px}
.foot-contact svg{width:17px;height:17px;flex:none;margin-top:3px;color:var(--green-bright)}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:26px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:13px;font-family:var(--font-mono)}
.foot-bottom a:hover{color:#fff}

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal{opacity:0;transform:translateY(28px);transition:.7s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.08s}
.reveal[data-d="2"]{transition-delay:.16s}
.reveal[data-d="3"]{transition-delay:.24s}
.reveal[data-d="4"]{transition-delay:.32s}
.reveal[data-d="5"]{transition-delay:.4s}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.hero-float{animation:none}}

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lightbox{position:fixed;inset:0;z-index:200;background:rgba(8,18,30,.9);backdrop-filter:blur(6px);display:none;align-items:center;justify-content:center;padding:30px}
.lightbox.show{display:flex}
.lightbox img{max-width:90vw;max-height:82vh;border-radius:var(--r);box-shadow:var(--shadow-lg)}
.lightbox .lb-cap{position:absolute;bottom:26px;left:0;right:0;text-align:center;color:#fff;font-family:var(--font-mono);font-size:14px}
.lightbox .lb-close{position:absolute;top:22px;right:26px;width:46px;height:46px;border-radius:50%;background:rgba(255,255,255,.12);color:#fff;font-size:22px;display:grid;place-items:center}
.lightbox .lb-close:hover{background:rgba(255,255,255,.24)}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:1040px){
  .cat-grid,.blog-grid,.cat-grid.cols-4,.cat-grid.cols-3{grid-template-columns:repeat(2,1fr)}
  .quad{grid-template-columns:repeat(2,1fr)}
  .value-grid{grid-template-columns:repeat(2,1fr)}
  .big-stats{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:900px){
  .nav-links,.nav-cta .btn{display:none}
  .nav-toggle{display:flex}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{max-width:460px;margin-inline:auto;width:100%}
  .split,.prod,.contact-grid{grid-template-columns:1fr;gap:36px}
  .split.rev .split-media,.prod.rev .prod-media{order:0}
  .value-grid,.cat-grid{grid-template-columns:1fr 1fr}
  .section{padding:72px 0}

  /* mobile drawer */
  .mobile-menu{
    position:fixed;inset:0 0 0 auto;width:min(340px,86vw);z-index:150;
    background:var(--surface);box-shadow:var(--shadow-lg);padding:26px;
    transform:translateX(100%);transition:.4s var(--ease);overflow-y:auto;
    display:flex;flex-direction:column;gap:6px;
  }
  .mobile-menu.open{transform:none}
  .mobile-overlay{display:block;position:fixed;inset:0;background:rgba(8,18,30,.4);z-index:140;opacity:0;visibility:hidden;transition:.3s}
  .mobile-overlay.open{opacity:1;visibility:visible}
  .mobile-menu > a{padding:14px 12px;border-radius:12px;font-family:var(--font-display);font-weight:600;font-size:16px;border-bottom:1px solid var(--line-2)}
  .mobile-menu > a:hover{background:var(--bg);color:var(--blue)}
  .mm-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
  .mm-close{width:42px;height:42px;border-radius:50%;background:var(--bg);font-size:20px;display:grid;place-items:center}
  .mm-sub{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);padding:16px 12px 6px}
  .mobile-menu .btn{margin-top:16px;justify-content:center}
}
@media(max-width:560px){
  body{font-size:16px}
  .wrap{padding-inline:18px}
  .cat-grid,.cat-grid.cols-4,.cat-grid.cols-3,.value-grid,.blog-grid,.quad,.big-stats,.field-row{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero-float.f1{left:-8px}.hero-float.f2{right:-8px}
  .contact-info,.form-card,.cta-band{padding:30px}
  .prod{padding:24px}
  .hero-stats{gap:24px}
  .section{padding:60px 0}
}

/* ============================================================
   MODEL DETAIL PAGES (products-soptop-<model>.html)
   ============================================================ */
.model-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.feat-rows .split + .split{margin-top:80px}
.feat-rows .split-media.fit{background:var(--surface)}
.feat-rows .split-media.fit img{aspect-ratio:auto;height:auto;object-fit:contain}
.feat-rows .split-body h3{font-size:clamp(22px,2.6vw,28px);margin-bottom:14px}
.feat-num{display:inline-block;font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--green);background:var(--green-soft);padding:4px 11px;border-radius:100px;margin-bottom:14px}
.dot-list{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.dot-list li{position:relative;padding-left:22px;color:var(--muted)}
.dot-list li::before{content:"";position:absolute;left:2px;top:.62em;width:8px;height:8px;border-radius:50%;background:var(--brand-grad)}
.fig-sub{margin-top:22px;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--surface)}
.fig-sub img{width:100%;display:block}
.fig-sub figcaption,.fig-cap{font-family:var(--font-mono);font-size:12.5px;color:var(--muted);padding:10px 14px;display:flex;justify-content:space-around;gap:10px;text-align:center}
.spectable tr.grp th{background:var(--green-soft);color:var(--green);font-family:var(--font-display);font-weight:600;font-size:13.5px;letter-spacing:.02em}
.spectable td ul{display:flex;flex-wrap:wrap;gap:6px 8px}
.spectable td li{background:var(--bg);border:1px solid var(--line);border-radius:100px;padding:3px 11px;font-size:12.5px}
.feat-rows figure,.fig-sub{margin:0}
.feat-rows .fig-sub{margin-top:22px}
.quad.q2{grid-template-columns:1fr 1fr}
@media(max-width:560px){.quad.q2{grid-template-columns:1fr}}

/* ============================================================
   LANGUAGE SWITCH (EN | TH) + THAI TYPOGRAPHY
   Thai pages are nexa-site/th/*.html with <html lang="th">.
   ============================================================ */
.lang-switch{display:inline-flex;align-items:center;padding:3px;border:1px solid var(--line);border-radius:100px;background:var(--surface);font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.06em}
.lang-switch a,.lang-switch span{padding:5px 10px;border-radius:100px;line-height:1;color:var(--muted)}
.lang-switch a:hover{color:var(--blue);background:var(--blue-soft)}
.lang-switch .on{background:var(--brand-grad);color:#fff}
.lang-switch .off{opacity:.4;cursor:not-allowed}
.mobile-menu .mm-lang{align-self:flex-start;margin:4px 0 10px}
.mobile-menu .mm-lang a,.mobile-menu .mm-lang span{padding:7px 14px;border:0;font-size:13px}

html[lang="th"] body{line-height:1.75}
html[lang="th"] h1,html[lang="th"] h2,html[lang="th"] h3,html[lang="th"] h4{line-height:1.35;letter-spacing:0}
html[lang="th"] .hero h1{line-height:1.25}
html[lang="th"] .kicker,html[lang="th"] .pill,html[lang="th"] .page-hero .pill,html[lang="th"] .crumbs,
html[lang="th"] .prod-series,html[lang="th"] .spec-cell .k,html[lang="th"] .sec-label .tag,
html[lang="th"] .featured-tag,html[lang="th"] .chip{letter-spacing:.02em}

/* contact form: spam honeypot + send error */
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-error{display:none;margin-top:14px;padding:12px 14px;border-radius:12px;background:#fdecec;color:#a8261f;font-size:14px}
.form-error.show{display:block}
.form-error a{text-decoration:underline}
#contact-form button[disabled]{opacity:.6;cursor:wait}

/* long-form text pages (privacy policy) */
.prose{max-width:860px}
.prose h2{font-size:clamp(21px,2.4vw,26px);margin:44px 0 14px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:18px;margin:24px 0 10px}
.prose p{color:var(--muted);margin-bottom:14px}
.prose ul,.prose ol{margin:0 0 16px 22px;color:var(--muted);display:flex;flex-direction:column;gap:8px}
.prose ul{list-style:disc}.prose ol{list-style:decimal}
.prose a{color:var(--blue);text-decoration:underline}
.prose .table-scroll{margin:8px 0 18px}
.foot-bottom a:hover{color:#fff;text-decoration:underline}

/* FAQ accordion (build.py also emits FAQPage JSON-LD from these) */
.faq-list{max-width:860px;margin-inline:auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);transition:.25s var(--ease)}
.faq-item[open]{box-shadow:var(--shadow-sm);border-color:transparent}
.faq-item summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 22px;font-family:var(--font-display);font-weight:600;font-size:16.5px;color:var(--ink)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--green-soft);color:var(--green);font-size:20px;line-height:1;transition:.25s var(--ease)}
.faq-item[open] summary::after{content:"−";background:var(--brand-grad);color:#fff}
.faq-a{padding:0 22px 20px;color:var(--muted)}
.faq-a a{color:var(--blue);text-decoration:underline}