/* ════════════════════════════════════════════════════
   NVK Fire Safety — v2 design system
   Clean, sober, trustworthy. Inspired by Apple / UBNT / Cisco.
   Palette: black · white · red (Hikvision)
   ════════════════════════════════════════════════════ */

:root{
  --ink:#0a0a0a;
  --paper:#ffffff;
  --gray-50:#fafafa;
  --gray-100:#f5f5f5;
  --gray-200:#e7e7e7;
  --gray-300:#d4d4d4;
  --gray-400:#a3a3a3;
  --gray-500:#737373;
  --gray-600:#525252;
  --gray-700:#404040;
  --gray-800:#262626;
  --red:#c8362e;
  --red-dark:#9c2820;
  --red-light:#fef2f1;
  --max:1200px;
  --max-narrow:880px;
  --nav-h:64px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:'Inter','Sarabun','Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.6;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
:lang(th),body{font-family:'Sarabun','Inter','Helvetica Neue',Arial,sans-serif}

img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit}

/* ───────── Typography ───────── */
h1,h2,h3,h4,h5{margin:0;font-weight:800;letter-spacing:-0.02em;color:var(--ink);line-height:1.15}
h1{font-size:clamp(36px,5.5vw,72px);font-weight:800;letter-spacing:-0.035em}
h2{font-size:clamp(28px,3.4vw,46px);letter-spacing:-0.025em}
h3{font-size:clamp(22px,2.2vw,30px)}
h4{font-size:18px;font-weight:700}
p{margin:0}
.eyebrow{
  font-family:'Inter',sans-serif;
  font-size:12px;font-weight:700;
  text-transform:uppercase;letter-spacing:0.16em;
  color:var(--red);margin-bottom:12px
}
.eyebrow.ink{color:var(--gray-500)}
.lede{font-size:18px;color:var(--gray-600);line-height:1.65;max-width:620px}

/* ───────── Layout ───────── */
.wrap{max-width:var(--max);margin:0 auto;padding:0 32px}
.wrap-narrow{max-width:var(--max-narrow);margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-sm{padding:60px 0}
.section-xl{padding:140px 0}
.section.dark{background:var(--ink);color:#fff}
.section.dark h1,.section.dark h2,.section.dark h3,.section.dark h4{color:#fff}
.section.dark .lede{color:rgba(255,255,255,.7)}
.section.dark .eyebrow.ink{color:rgba(255,255,255,.5)}
.section.tint{background:var(--gray-50)}
.divider{border:none;border-top:1px solid var(--gray-200);margin:0}

@media(max-width:640px){
  .section{padding:64px 0}
  .section-xl{padding:88px 0}
  .wrap,.wrap-narrow{padding:0 20px}
}

/* ───────── Navigation ───────── */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(10,10,10,.94);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid rgba(255,255,255,.08);
  height:var(--nav-h);
  color:#fff;
}
.nav-inner{max-width:var(--max);margin:0 auto;padding:0 32px;height:100%;
  display:flex;align-items:center;gap:32px}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.01em}
.nav-logo img{height:22px;width:auto;filter:brightness(0) invert(1)}
.nav-logo .pipe{opacity:.35;font-weight:400}
.nav-links{display:flex;gap:28px;flex:1;font-size:14px;font-weight:500}
.nav-links a{color:rgba(255,255,255,.78);transition:color .15s}
.nav-links a:hover,.nav-links a.active{color:#fff}
.nav-right{display:flex;align-items:center;gap:14px;font-size:13px}
.nav-right .phone{color:rgba(255,255,255,.65)}
@media(max-width:860px){.nav-links{display:none}}

/* ───────── Buttons ───────── */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;border-radius:999px;
  font-weight:600;font-size:14.5px;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .15s,background .15s,color .15s,border-color .15s;
  white-space:nowrap;
}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover{background:var(--red-dark)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#222}
.btn-outline{border-color:var(--ink);color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:#fff}
.btn-ghost{color:var(--ink);text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--gray-300)}
.btn-ghost:hover{text-decoration-color:var(--red)}
.section.dark .btn-outline{border-color:#fff;color:#fff}
.section.dark .btn-outline:hover{background:#fff;color:var(--ink)}
.section.dark .btn-ghost{color:rgba(255,255,255,.85)}

/* ───────── Hero ───────── */
.hero{padding:80px 0 60px;background:var(--paper)}
.hero.dark{background:var(--ink);color:#fff}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center;max-width:var(--max);margin:0 auto;padding:0 32px}
.hero-text h1{margin-bottom:18px}
.hero-text .lede{margin-bottom:32px;font-size:20px;max-width:none}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-visual{position:relative;display:flex;justify-content:center;align-items:center}
.hero-visual img{max-width:100%;width:auto;border-radius:14px}
.hero-pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.hero-pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:999px;
  background:var(--gray-100);color:var(--gray-700);
  font-size:12.5px;font-weight:600
}
.hero.dark .hero-pill{background:rgba(255,255,255,.08);color:rgba(255,255,255,.78)}
@media(max-width:860px){
  .hero-grid{grid-template-columns:1fr;gap:36px;padding:0 20px}
}

/* breadcrumb */
.crumb{font-size:13px;color:var(--gray-500);margin-bottom:14px}
.crumb a:hover{color:var(--red)}
.crumb .sep{margin:0 8px;color:var(--gray-300)}
.hero.dark .crumb{color:rgba(255,255,255,.55)}
.hero.dark .crumb a:hover{color:#fff}

/* ───────── Sec Header ───────── */
.sec-head{margin-bottom:48px}
.sec-head.center{text-align:center}
.sec-head h2{margin-bottom:14px}
.sec-head.center .lede{margin-left:auto;margin-right:auto}

/* ───────── Architecture / Diagram block ───────── */
.diagram-block{display:grid;grid-template-columns:1fr;gap:24px}
.diagram-img{background:var(--gray-50);border:1px solid var(--gray-200);border-radius:14px;overflow:hidden;padding:16px}
.diagram-img img{margin:0 auto;width:100%}
.section.dark .diagram-img{background:#111;border-color:rgba(255,255,255,.08)}
.diagram-caption{font-size:13.5px;color:var(--gray-500);text-align:center}

/* ───────── Product cards grid ───────── */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}
.cards.cards-2{grid-template-columns:1fr 1fr;gap:32px}
.cards.cards-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:980px){.cards.cards-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.cards.cards-2,.cards.cards-4{grid-template-columns:1fr}}

.card{
  display:flex;flex-direction:column;
  background:var(--paper);border:1px solid var(--gray-200);border-radius:14px;
  overflow:hidden;transition:transform .2s,box-shadow .2s,border-color .2s;
  text-decoration:none;color:inherit;
}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(0,0,0,.08);border-color:var(--gray-300)}
.section.dark .card{background:#141414;border-color:rgba(255,255,255,.08)}
.section.dark .card:hover{border-color:rgba(255,255,255,.18)}
.card-img{aspect-ratio:4/3;background:var(--gray-100);display:flex;align-items:center;justify-content:center;overflow:hidden}
.card-img img{width:100%;height:100%;object-fit:cover}
.section.dark .card-img{background:#1c1c1c}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-eye{font-size:11.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--red)}
.card h3{font-size:19px;margin:0}
.card h4{font-size:17px;margin:0}
.card p{color:var(--gray-600);font-size:14.5px;line-height:1.55}
.section.dark .card p{color:rgba(255,255,255,.65)}
.card-foot{margin-top:auto;padding-top:10px;font-weight:600;font-size:13.5px;color:var(--red);display:inline-flex;align-items:center;gap:6px}
.card-foot::after{content:"→";transition:transform .15s}
.card:hover .card-foot::after{transform:translateX(3px)}

/* product card (model lineup) */
.model{
  display:flex;flex-direction:column;gap:14px;
  padding:24px;border:1px solid var(--gray-200);border-radius:14px;background:#fff;
}
.model-img{aspect-ratio:1/1;background:var(--gray-50);border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.model-img img{max-width:80%;max-height:80%;object-fit:contain}
.model-code{font-family:'JetBrains Mono','Menlo',monospace;font-size:12.5px;color:var(--red);font-weight:700;letter-spacing:.02em}
.model-name{font-weight:700;font-size:16.5px;line-height:1.3}
.model-desc{font-size:13.5px;color:var(--gray-600);line-height:1.5}
.model-specs{margin-top:6px;padding-top:12px;border-top:1px solid var(--gray-100);list-style:none;padding-left:0;font-size:13px;color:var(--gray-600)}
.model-specs li{padding:3px 0;display:flex;gap:8px}
.model-specs li::before{content:"·";color:var(--red);font-weight:800}

/* ───────── Slider (product carousel) ───────── */
.slider{position:relative;overflow:hidden;border-radius:16px;background:#fff;border:1px solid var(--gray-200)}
.slider-track{display:flex;transition:transform .6s cubic-bezier(.45,.05,.1,.97);will-change:transform}
.slide{
  flex:0 0 100%;display:grid;grid-template-columns:1fr 1fr;gap:48px;
  padding:56px 64px;text-decoration:none;color:inherit;align-items:center;
  min-height:440px;background:#fff
}
.slide-img{aspect-ratio:4/3;background:var(--gray-50);border-radius:12px;
  display:flex;align-items:center;justify-content:center;overflow:hidden}
.slide-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.slide:hover .slide-img img{transform:scale(1.03)}
.slide-body{padding-right:24px}
.slide-eye{font-size:12px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--red);margin-bottom:16px;
  font-family:'JetBrains Mono','Menlo',monospace}
.slide-body h3{font-size:clamp(24px,3vw,36px);margin:0 0 16px;letter-spacing:-.025em;line-height:1.15}
.slide-body .lede{margin-bottom:28px;font-size:17px}
.slide-cta{margin-top:6px}
.slide-cta::after{content:" →";transition:transform .15s;display:inline-block}
.slide:hover .slide-cta::after{transform:translateX(4px)}

.slider-nav{
  position:absolute;top:50%;transform:translateY(-50%);
  width:48px;height:48px;border:1px solid var(--gray-300);background:#fff;
  border-radius:50%;cursor:pointer;font-size:22px;font-weight:600;
  display:flex;align-items:center;justify-content:center;z-index:3;
  color:var(--ink);transition:.18s;box-shadow:0 4px 14px rgba(0,0,0,.08);
  font-family:inherit;line-height:1;padding-bottom:3px
}
.slider-nav:hover{background:var(--ink);color:#fff;border-color:var(--ink);transform:translateY(-50%) scale(1.05)}
.slider-nav.prev{left:20px}
.slider-nav.next{right:20px}

.slider-dots{
  position:absolute;bottom:22px;left:0;right:0;
  display:flex;justify-content:center;gap:8px;z-index:3
}
.slider-dot{
  width:36px;height:4px;border:none;background:var(--gray-300);
  border-radius:2px;cursor:pointer;transition:background .2s,width .2s;padding:0
}
.slider-dot:hover{background:var(--gray-500)}
.slider-dot.active{background:var(--red);width:48px}

@media(max-width:860px){
  .slide{grid-template-columns:1fr;gap:28px;padding:36px 28px;min-height:auto}
  .slide-img{aspect-ratio:16/10}
  .slide-body{padding-right:0}
  .slide-body h3{font-size:24px}
  .slider-nav{display:none}
  .slider-dots{bottom:14px}
}

/* In edit mode — disable slider transform so all slides are editable */
body.cms-edit .slider-track{transform:none!important;display:flex;flex-direction:column}
body.cms-edit .slide{flex:0 0 auto;border-bottom:1px dashed var(--gray-200)}
body.cms-edit .slider-nav,body.cms-edit .slider-dots{display:none}

/* ───────── Features list (no icons, just text) ───────── */
.feat-list{display:grid;grid-template-columns:1fr 1fr;gap:36px 56px}
.feat-item h4{margin-bottom:8px;font-size:18px;font-weight:700}
.feat-item p{color:var(--gray-600);font-size:15px;line-height:1.6}
.feat-item .num{font-family:'Inter',sans-serif;font-size:13px;font-weight:700;color:var(--red);letter-spacing:.05em;margin-bottom:6px;display:block}
@media(max-width:680px){.feat-list{grid-template-columns:1fr;gap:28px}}

/* ───────── Spec table ───────── */
.spec-table{width:100%;border-collapse:collapse;font-size:14.5px;line-height:1.55}
.spec-table th,.spec-table td{padding:14px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--gray-200)}
.spec-table thead th{font-size:11.5px;text-transform:uppercase;letter-spacing:.12em;color:var(--gray-500);font-weight:700;background:var(--gray-50);border-bottom:1.5px solid var(--gray-300)}
.spec-table tbody tr:hover{background:var(--gray-50)}
.spec-table .k{color:var(--gray-700);font-weight:600;width:34%}

/* ───────── Standards / cert strip ───────── */
.standards{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;align-items:center}
.std-badge{
  padding:10px 18px;border:1.5px solid var(--gray-200);border-radius:8px;
  font-size:13px;font-weight:700;color:var(--gray-700);
  display:inline-flex;align-items:center;gap:8px;background:#fff
}
.std-badge b{color:var(--red);font-weight:800}

/* ───────── Videos ───────── */
.videos{display:grid;grid-template-columns:2fr 1fr;gap:28px}
.video-main{aspect-ratio:16/9;background:#000;border-radius:14px;overflow:hidden;position:relative}
.video-main iframe{width:100%;height:100%;border:none}
.video-list{display:flex;flex-direction:column;gap:12px}
.video-item{display:flex;gap:14px;padding:10px;border-radius:10px;transition:background .15s;cursor:pointer}
.video-item:hover{background:var(--gray-100)}
.section.dark .video-item:hover{background:rgba(255,255,255,.06)}
.video-thumb{flex:0 0 120px;aspect-ratio:16/9;background:#000 center/cover no-repeat;border-radius:8px}
.video-meta h5{font-size:14px;margin:0 0 4px;font-weight:700;line-height:1.35}
.video-meta span{font-size:12px;color:var(--gray-500)}
@media(max-width:780px){.videos{grid-template-columns:1fr}}

/* ───────── Articles ───────── */
.articles-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.article{
  display:flex;flex-direction:column;gap:0;background:#fff;
  border:1px solid var(--gray-200);border-radius:12px;overflow:hidden;
  transition:transform .2s,box-shadow .2s
}
.article:hover{transform:translateY(-3px);box-shadow:0 10px 28px rgba(0,0,0,.07)}
.article-img{aspect-ratio:16/9;background:var(--gray-100) center/cover no-repeat}
.article-body{padding:20px}
.article-cat{font-size:11px;font-weight:700;color:var(--red);text-transform:uppercase;letter-spacing:.1em;margin-bottom:6px}
.article h4{font-size:16.5px;line-height:1.4;margin-bottom:8px}
.article p{font-size:13.5px;color:var(--gray-600);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-meta{margin-top:12px;padding-top:12px;border-top:1px solid var(--gray-100);font-size:12px;color:var(--gray-500)}

/* ───────── Use-cases (bare, no fancy gradients) ───────── */
.usecases{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.usecase{
  padding:28px;border-radius:14px;background:var(--gray-50);
  border:1px solid var(--gray-200);transition:border-color .15s,transform .2s
}
.usecase:hover{border-color:var(--gray-300);transform:translateY(-2px)}
.usecase h4{margin-bottom:8px}
.usecase p{color:var(--gray-600);font-size:14.5px}

/* ───────── CTA section ───────── */
.cta-band{
  padding:88px 0;background:var(--ink);color:#fff;text-align:center
}
.cta-band h2{color:#fff;margin-bottom:18px;max-width:680px;margin-left:auto;margin-right:auto}
.cta-band p{color:rgba(255,255,255,.7);max-width:540px;margin:0 auto 28px;font-size:17px}
.cta-actions{display:inline-flex;gap:12px;flex-wrap:wrap;justify-content:center}

/* ───────── Footer ───────── */
.foot{background:var(--ink);color:rgba(255,255,255,.6);padding:60px 0 32px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:40px}
.foot-brand img{height:24px;filter:brightness(0) invert(1);margin-bottom:14px}
.foot-brand p{font-size:13.5px;line-height:1.6;color:rgba(255,255,255,.55);max-width:340px}
.foot-col h5{color:#fff;font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;margin-bottom:14px}
.foot-col ul{list-style:none;padding:0;margin:0}
.foot-col li{margin-bottom:8px}
.foot-col a{color:rgba(255,255,255,.6);font-size:13.5px;transition:color .15s}
.foot-col a:hover{color:#fff}
.foot-bottom{padding-top:24px;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;font-size:12.5px;color:rgba(255,255,255,.4)}
@media(max-width:780px){.foot-grid{grid-template-columns:1fr 1fr;gap:32px}.foot-brand{grid-column:1/-1}}

/* ───────── Two-column block ───────── */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-img{border-radius:14px;overflow:hidden;background:var(--gray-50)}
.split-img img{width:100%}
@media(max-width:860px){.split{grid-template-columns:1fr;gap:28px}}

/* ───────── Quote / pull ───────── */
.pull-quote{
  font-size:clamp(22px,2.4vw,32px);line-height:1.4;letter-spacing:-.015em;
  font-weight:600;color:var(--ink);max-width:820px;margin:0 auto;text-align:center;
}
.pull-quote::before{content:"";display:block;width:36px;height:3px;background:var(--red);margin:0 auto 22px}

/* ───────── Resources (Download) ───────── */
.resources{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.resource{
  padding:22px;border:1px solid var(--gray-200);border-radius:12px;background:#fff;
  display:flex;flex-direction:column;gap:6px;transition:border-color .15s,transform .15s
}
.resource:hover{border-color:var(--red);transform:translateY(-2px)}
.resource .tag{font-size:11px;font-weight:700;color:var(--gray-500);text-transform:uppercase;letter-spacing:.1em}
.resource h4{font-size:16px;margin:0 0 4px}
.resource p{font-size:13px;color:var(--gray-600)}
.resource .go{margin-top:8px;font-size:13px;font-weight:700;color:var(--red)}

/* ───────── Article subpage ───────── */
.article-hero{padding:72px 0 40px;border-bottom:1px solid var(--gray-200)}
.article-hero h1{font-size:clamp(28px,3.6vw,44px);margin-bottom:14px;letter-spacing:-.02em}
.article-meta-bar{display:flex;gap:16px;align-items:center;color:var(--gray-500);font-size:13.5px;margin-bottom:18px}
.article-meta-bar .cat{color:var(--red);font-weight:700;text-transform:uppercase;letter-spacing:.1em;font-size:12px}
.article-cover{aspect-ratio:16/9;background:var(--gray-100) center/cover no-repeat;border-radius:14px;overflow:hidden;margin:32px 0}
.article-body{font-size:17px;line-height:1.75;color:var(--gray-800);max-width:720px;margin:0 auto}
.article-body h2{font-size:28px;margin:40px 0 14px}
.article-body h3{font-size:22px;margin:32px 0 12px}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:24px}
.article-body img{border-radius:10px;margin:18px 0;width:100%}
.article-body a{color:var(--red);text-decoration:underline;text-underline-offset:3px}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px}
.article-body th,.article-body td{padding:11px 14px;border:1px solid var(--gray-200);text-align:left}
.article-body th{background:var(--gray-50);font-weight:700;color:var(--gray-700)}

/* hides Edit button on viewer mode if needed */
@media print{.nav,.cms-edit-fab,#cms-toolbar{display:none!important}}