/* ========================================
   CNSTECH Security Systems — CSS
   Dark technical base, cyan accent
   ======================================== */

/* --- Reset & Base --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:        #0b0e14;
  --bg-card:   #111620;
  --bg-card-h: #161c2a;
  --surface:   #1a2030;
  --border:    #1e2a3a;
  --text:      #cdd6e0;
  --text-dim:  #8494a7;
  --heading:   #e8edf3;
  --cyan:      #00d4ff;
  --cyan-dim:  rgba(0,212,255,.15);
  --cyan-glow: rgba(0,212,255,.35);
  --white:     #fff;
  --radius:    8px;
  --container:  1180px;
  --header-h:  64px;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.65;
  font-size:16px;overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--cyan);text-decoration:none;transition:color .2s}
a:hover{color:var(--white)}
ul,ol{list-style:none}

.container{
  width:100%;max-width:var(--container);
  margin:0 auto;padding:0 24px;
}

/* --- Header --- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(11,14,20,.92);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  height:var(--header-h);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:var(--header-h);
}
.logo-link{display:flex;align-items:center}
.logo{height:32px;width:auto}
.nav-list{display:flex;gap:32px}
.nav-list a{
  color:var(--text);font-size:.9rem;font-weight:500;
  letter-spacing:.02em;transition:color .2s;
}
.nav-list a:hover{color:var(--cyan)}

/* Hamburger */
.nav-toggle{
  display:none;background:none;border:none;cursor:pointer;
  width:36px;height:36px;position:relative;
}
.hamburger,.hamburger::before,.hamburger::after{
  display:block;width:22px;height:2px;background:var(--text);
  border-radius:2px;position:absolute;left:7px;transition:.3s;
}
.hamburger{top:17px}
.hamburger::before{content:'';top:-7px}
.hamburger::after{content:'';top:7px}
.nav-toggle[aria-expanded="true"] .hamburger{background:transparent}
.nav-toggle[aria-expanded="true"] .hamburger::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .hamburger::after{top:0;transform:rotate(-45deg)}

/* --- Hero --- */
.hero{
  position:relative;min-height:min(85vh,700px);
  display:flex;align-items:center;overflow:hidden;
}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(11,14,20,.88) 0%,rgba(11,14,20,.6) 50%,rgba(11,14,20,.78) 100%);
}
/* Scan-line animation */
.hero-scanline{
  position:absolute;inset:0;
  background:repeating-linear-gradient(
    0deg,
    transparent,transparent 2px,
    rgba(0,212,255,.03) 2px,rgba(0,212,255,.03) 4px
  );
  pointer-events:none;
}
.hero-scanline::after{
  content:'';position:absolute;left:0;right:0;
  height:2px;background:linear-gradient(90deg,transparent,var(--cyan-glow),transparent);
  animation:scanMove 4s ease-in-out infinite;
  opacity:.6;
}
@keyframes scanMove{
  0%{top:0}50%{top:100%}100%{top:0}
}
.hero-content{position:relative;z-index:1;max-width:680px;padding:100px 24px 80px}
.hero h1{
  font-size:clamp(1.75rem,4vw,2.75rem);
  font-weight:700;color:var(--white);
  line-height:1.2;margin-bottom:20px;
}
.hero-sub{
  font-size:clamp(.95rem,1.5vw,1.1rem);
  color:var(--text);line-height:1.7;margin-bottom:32px;
}
.hero-ctas{display:flex;gap:16px;flex-wrap:wrap}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 28px;border-radius:var(--radius);
  font-size:.95rem;font-weight:600;
  transition:background .25s,color .25s,box-shadow .25s;
  cursor:pointer;border:none;white-space:nowrap;
}
.btn-primary{
  background:var(--cyan);color:var(--bg);
}
.btn-primary:hover{
  background:var(--white);color:var(--bg);
  box-shadow:0 0 20px var(--cyan-glow);
}
.btn-secondary{
  background:transparent;color:var(--cyan);
  border:1px solid var(--cyan);
}
.btn-secondary:hover{
  background:var(--cyan-dim);color:var(--white);
}

/* --- Trust Strip --- */
.trust-strip{
  background:var(--surface);
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
  padding:20px 0;
}
.trust-list{
  display:flex;justify-content:center;gap:36px;flex-wrap:wrap;
}
.trust-list li{
  display:flex;align-items:center;gap:10px;
  font-size:.85rem;color:var(--text-dim);font-weight:500;
  white-space:nowrap;
}
.trust-icon{color:var(--cyan);display:flex;flex-shrink:0}

/* --- Services Section --- */
.services-section{padding:100px 0}
.services-section h2,.ecosystem-section h2,.standards-section h2,
.process-section h2,.brands-section h2,.video-section h2,
.faq-section h2,.cta-section h2{
  font-size:clamp(1.4rem,3vw,2rem);font-weight:700;
  color:var(--heading);text-align:center;margin-bottom:16px;
}
.section-intro{
  text-align:center;color:var(--text-dim);
  max-width:640px;margin:0 auto 48px;font-size:.95rem;
}
.services-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
  gap:24px;
}
.service-card{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:32px 28px;
  transition:border-color .3s,background .3s,transform .3s;
}
.service-card:hover{
  border-color:var(--cyan);background:var(--bg-card-h);
  transform:translateY(-3px);
}
.card-icon{color:var(--cyan);margin-bottom:16px}
.service-card h3{
  font-size:1.1rem;font-weight:600;color:var(--heading);margin-bottom:10px;
}
.service-card p{
  font-size:.9rem;color:var(--text-dim);line-height:1.65;
}
.card-link{
  display:inline-block;margin-top:14px;font-size:.85rem;font-weight:600;
  color:var(--cyan);
}
.card-link:hover{color:var(--white)}

/* --- Ecosystem --- */
.ecosystem-section{padding:80px 0;background:var(--surface)}
.ecosystem-section h2{margin-bottom:12px}
.ecosystem-map{
  display:flex;align-items:center;justify-content:center;
  flex-wrap:wrap;gap:0;padding:40px 0 0;
}
.eco-node{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  min-width:110px;position:relative;
}
.eco-dot{
  width:48px;height:48px;border-radius:50%;
  border:2px solid var(--cyan);
  background:var(--bg-card);
  position:relative;
  display:flex;align-items:center;justify-content:center;
}
.eco-dot::after{
  content:'';width:12px;height:12px;border-radius:50%;
  background:var(--cyan);
  animation:pulse 2.5s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:.4;transform:scale(.8)}
  50%{opacity:1;transform:scale(1)}
}
.eco-node--cns .eco-dot{border-color:var(--white);background:var(--cyan-dim)}
.eco-node--cns .eco-dot::after{background:var(--white)}
.eco-node span{
  font-size:.78rem;color:var(--text-dim);text-align:center;
  font-weight:500;max-width:100px;
}
.eco-connector{
  width:40px;height:2px;background:var(--border);
  position:relative;flex-shrink:0;
}
.eco-connector::before{
  content:'';position:absolute;top:-1px;left:0;right:0;height:4px;
  background:linear-gradient(90deg,transparent,var(--cyan-dim),transparent);
  animation:flowLine 2s linear infinite;
}
@keyframes flowLine{
  0%{opacity:0;transform:translateX(-100%)}
  50%{opacity:1}
  100%{opacity:0;transform:translateX(100%)}
}

/* --- Standards --- */
.standards-section{padding:80px 0}
.standards-section h2{margin-bottom:12px}
.grades-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));
  gap:20px;margin-top:8px;
}
.grade-card{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:24px;
  transition:border-color .3s;
}
.grade-card:hover{border-color:var(--cyan)}
.grade-badge{
  display:inline-block;font-size:.75rem;font-weight:700;
  color:var(--cyan);background:var(--cyan-dim);
  padding:4px 12px;border-radius:4px;margin-bottom:12px;
  letter-spacing:.04em;text-transform:uppercase;
}
.grade-card p{font-size:.9rem;color:var(--text-dim);line-height:1.55}

/* --- Process --- */
.process-section{padding:80px 0;background:var(--surface)}
.process-steps{
  max-width:720px;margin:48px auto 0;
  counter-reset:step;
}
.process-step{
  display:flex;gap:24px;padding:24px 0;
  border-bottom:1px solid var(--border);
  align-items:flex-start;
}
.process-step:last-child{border-bottom:none}
.step-num{
  font-size:1.6rem;font-weight:800;color:var(--cyan);
  opacity:.5;min-width:44px;line-height:1;
  padding-top:2px;
}
.process-step h3{
  font-size:1rem;font-weight:600;color:var(--heading);margin-bottom:4px;
}
.process-step p{font-size:.88rem;color:var(--text-dim)}

/* --- Brands --- */
.brands-section{padding:80px 0}
.brands-section h2{margin-bottom:12px}
.brands-list{
  display:flex;justify-content:center;flex-wrap:wrap;gap:16px;
  margin-top:8px;
}
.brands-list li a{
  display:inline-block;padding:10px 28px;
  border:1px solid var(--border);border-radius:var(--radius);
  font-size:.9rem;font-weight:600;color:var(--text-dim);
  transition:border-color .3s,color .3s,background .3s;
}
.brands-list li a:hover{
  border-color:var(--cyan);color:var(--cyan);background:var(--cyan-dim);
}

/* --- Video --- */
.video-section{padding:80px 0;background:var(--surface)}
.video-section h2{margin-bottom:32px}
.video-player{
  position:relative;max-width:800px;margin:0 auto;
  border-radius:var(--radius);overflow:hidden;
  aspect-ratio:16/9;background:#000;
}
.video-play-btn{
  display:block;width:100%;height:100%;border:none;padding:0;
  cursor:pointer;background:none;position:relative;
}
.video-thumb{width:100%;height:100%;object-fit:cover}
.play-icon{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  transition:transform .3s,opacity .3s;
  filter:drop-shadow(0 2px 8px rgba(0,0,0,.5));
}
.video-play-btn:hover .play-icon{transform:translate(-50%,-50%) scale(1.1)}
.video-player iframe{
  position:absolute;inset:0;width:100%;height:100%;border:none;
}

/* --- FAQ --- */
.faq-section{padding:80px 0}
.faq-section h2{margin-bottom:40px}
.faq-list{max-width:760px;margin:0 auto}
.faq-item{
  border-bottom:1px solid var(--border);
}
.faq-item summary{
  padding:20px 0;font-size:.95rem;font-weight:600;
  color:var(--heading);cursor:pointer;
  list-style:none;position:relative;padding-right:32px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:'+';position:absolute;right:0;top:50%;
  transform:translateY(-50%);font-size:1.3rem;color:var(--cyan);
  transition:transform .25s;font-weight:300;
}
.faq-item[open] summary::after{content:'−'}
.faq-answer{padding:0 0 20px}
.faq-answer p{font-size:.9rem;color:var(--text-dim);line-height:1.7}

/* --- CTA Section --- */
.cta-section{
  padding:80px 0;text-align:center;
  background:linear-gradient(135deg,var(--surface) 0%,rgba(0,212,255,.05) 100%);
  border-top:1px solid var(--border);
}
.cta-section h2{margin-bottom:12px}
.cta-section>. container>p{
  color:var(--text-dim);max-width:560px;margin:0 auto 32px;
  font-size:.95rem;
}
.cta-section .container > p{
  color:var(--text-dim);max-width:560px;margin:0 auto 32px;font-size:.95rem;
}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* --- Footer --- */
.site-footer{
  background:var(--bg-card);border-top:1px solid var(--border);
  padding:60px 0 0;
}
.footer-inner{
  display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;
}
.footer-logo{height:28px;width:auto;margin-bottom:14px}
.footer-brand p{font-size:.85rem;color:var(--text-dim);max-width:340px;line-height:1.65}
.footer-nav h3,.footer-contact h3{
  font-size:.8rem;font-weight:700;color:var(--heading);
  text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px;
}
.footer-nav ul,.footer-contact ul{display:flex;flex-direction:column;gap:8px}
.footer-nav a,.footer-contact a{font-size:.85rem;color:var(--text-dim)}
.footer-nav a:hover,.footer-contact a:hover{color:var(--cyan)}
.footer-contact li{font-size:.85rem;color:var(--text-dim)}
.footer-bottom{
  margin-top:40px;padding:16px 0;
  border-top:1px solid var(--border);
}
.footer-bottom p{font-size:.78rem;color:var(--text-dim);text-align:center}

/* --- Reveal animation --- */
.reveal{
  opacity:0;transform:translateY(24px);
  transition:opacity .6s ease,transform .6s ease;
}
.reveal.is-visible{opacity:1;transform:translateY(0)}

/* --- prefers-reduced-motion --- */
@media(prefers-reduced-motion:reduce){
  .hero-scanline::after,
  .eco-dot::after,
  .eco-connector::before{animation:none !important}
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
  .footer-inner{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
  .ecosystem-map{gap:8px}
  .eco-connector{width:24px}
}

@media(max-width:768px){
  .nav-toggle{display:block}
  .primary-nav{
    position:fixed;top:var(--header-h);left:0;right:0;bottom:0;
    background:rgba(11,14,20,.97);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    display:flex;align-items:center;justify-content:center;
    transform:translateX(100%);transition:transform .35s ease;
    z-index:99;
  }
  .primary-nav.is-open{transform:translateX(0)}
  .nav-list{
    flex-direction:column;align-items:center;gap:28px;
  }
  .nav-list a{font-size:1.2rem}
  .hero-content{padding:80px 20px 60px}
  .services-grid{grid-template-columns:1fr}
  .ecosystem-map{
    flex-direction:column;align-items:center;
  }
  .eco-connector{
    width:2px;height:24px;
  }
  .eco-connector::before{
    width:4px;height:100%;top:0;left:-1px;
    background:linear-gradient(180deg,transparent,var(--cyan-dim),transparent);
  }
  .grades-grid{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr}
  .trust-list{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:14px 18px;
    justify-content:initial;
    overflow:visible;
    padding:0;
  }
  .trust-list li{
    min-width:0;
    white-space:normal;
    flex-shrink:1;
  }
}

@media(max-width:480px){
  .grades-grid{grid-template-columns:1fr}
  .hero-ctas{flex-direction:column}
  .hero-ctas .btn{text-align:center;justify-content:center}
  .trust-list{grid-template-columns:1fr}
}