/* ============ Header ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  transition:background .3s,border-color .3s,backdrop-filter .3s;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(8,11,16,.82);backdrop-filter:blur(16px);border-bottom-color:var(--border);
}
/* promo / marketing strip */
.promo-bar{
  background:linear-gradient(90deg,rgba(25,184,74,.16),rgba(255,210,0,.12) 50%,rgba(226,0,26,.16));
  border-bottom:1px solid var(--border);
}
.promo-inner{display:flex;align-items:center;justify-content:center;gap:14px;min-height:42px;padding:7px 28px;flex-wrap:wrap;text-align:center}
.promo-pill{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;font-weight:600;
  color:#0a0d12;background:var(--g-yellow);padding:4px 10px;border-radius:100px;white-space:nowrap;
}
.promo-text{font-size:13.5px;color:var(--text);font-weight:600}
.promo-link{
  font-size:13px;font-weight:700;color:#fff;display:inline-flex;align-items:center;gap:5px;white-space:nowrap;
  border-bottom:1.5px solid var(--red-2);padding-bottom:1px;transition:opacity .2s;
}
.promo-link::after{content:"→"}
.promo-link:hover{opacity:.75}
.header-inner{display:flex;align-items:center;gap:24px;height:70px}
.brand{display:flex;align-items:center;gap:15px;flex-shrink:0}
.brand .logo-ducnet{height:42px;width:auto}
.brand .by{
  display:flex;align-items:center;gap:9px;padding-left:15px;border-left:1px solid var(--border-strong);height:34px;
}
.brand .by .by-lbl{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--text-3)}
.brand .by img{height:22px;width:auto}
.nav{display:flex;gap:30px;margin-left:14px}
.nav a{font-size:14.5px;color:var(--text-2);font-weight:500;transition:color .2s;position:relative}
.nav a:hover{color:var(--text)}
.nav a::after{content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;background:var(--energy);transition:width .25s var(--ease)}
.nav a:hover::after{width:100%}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}

/* lang switch */
.lang{display:flex;background:var(--surface);border:1px solid var(--border);border-radius:9px;padding:3px;gap:2px}
.lang button{
  font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.05em;color:var(--text-3);
  background:none;border:none;cursor:pointer;padding:5px 9px;border-radius:6px;transition:.2s;
}
.lang button.active{background:var(--red);color:#fff}
.header-actions .btn{padding:10px 16px;font-size:14px}
.menu-toggle{display:none;background:var(--surface);border:1px solid var(--border);border-radius:9px;width:42px;height:42px;cursor:pointer;color:var(--text)}

/* mobile nav drawer */
.mobile-nav{
  position:fixed;inset:0;z-index:49;background:rgba(8,11,16,.98);backdrop-filter:blur(10px);
  display:flex;flex-direction:column;justify-content:flex-start;gap:2px;
  padding:128px 28px 40px;overflow-y:auto;
  opacity:0;pointer-events:none;transition:opacity .3s;
}
.mobile-nav.open{opacity:1;pointer-events:auto}
.mobile-nav a{font-family:var(--font-display);font-size:25px;font-weight:600;padding:14px 0;color:var(--text);border-bottom:1px solid var(--border)}
.mobile-nav .m-actions{display:flex;flex-direction:column;gap:12px;margin-top:28px;border:none}
.mobile-nav .m-actions .btn{width:100%;justify-content:center;padding:16px 22px;font-size:16px;border-bottom:none}

/* ============ Hero ============ */
.hero{padding:160px 0 70px;position:relative}
.hero-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(34px,5vw,62px);margin:22px 0}
.hero h1 .hl{
  background:var(--energy);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .lead{font-size:clamp(16px,1.7vw,19px);color:var(--text-2);max-width:560px;margin-bottom:30px}
.hero .lead b{color:var(--text);font-weight:700}
.hero-cta{display:flex;flex-wrap:wrap;gap:13px;margin-bottom:20px}
.free-badge{display:inline-flex;align-items:center;gap:9px;margin-bottom:30px;font-size:13.5px;font-weight:600;color:var(--text-2);
  background:var(--surface);border:1px solid var(--border);padding:8px 14px;border-radius:100px}
.free-badge .spark{width:9px;height:9px;border-radius:50%;background:var(--g-green);box-shadow:0 0 0 4px rgba(25,184,74,.18);flex-shrink:0}
.free-badge b{color:var(--text)}
.hero-stats{display:flex;gap:30px;flex-wrap:wrap}
.hstat .num{font-family:var(--font-display);font-size:26px;font-weight:600}
.hstat .lbl{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-3)}

/* ============ Schema diagram ============ */
.schema{
  position:relative;background:
    radial-gradient(120% 120% at 50% 0%, rgba(255,255,255,.05), transparent 60%),
    var(--bg-1);
  border:1px solid var(--border);border-radius:24px;padding:26px;overflow:hidden;
  box-shadow:0 40px 80px -40px rgba(0,0,0,.8);
}
.schema::before{
  content:"";position:absolute;inset:0;background-image:
    linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:34px 34px;mask-image:radial-gradient(100% 80% at 50% 30%,#000,transparent 80%);
}
.schema svg{position:relative;width:100%;height:auto;display:block}
.flow-path{fill:none;stroke:rgba(255,255,255,.14);stroke-width:2}
.flow-dash{fill:none;stroke-width:2.4;stroke-linecap:round;stroke-dasharray:2 13;animation:flow 1.1s linear infinite}
@keyframes flow{to{stroke-dashoffset:-15}}
.node-card{transition:transform .3s var(--ease)}
.schema-node-label{font-family:var(--font-mono);font-size:11px;fill:var(--text-2);letter-spacing:.06em}
.schema-node-title{font-family:var(--font-display);font-weight:600;fill:var(--text)}
.pulse-ring{transform-origin:center;animation:pulsering 2.6s ease-out infinite}
@keyframes pulsering{0%{opacity:.7;transform:scale(.7)}70%{opacity:0;transform:scale(1.5)}100%{opacity:0}}
.live-dot{animation:blink 1.4s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}

/* ============ generic section ============ */
.section{padding:96px 0}
.section.tight{padding:70px 0}

/* steps / how it works */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;counter-reset:step}
.step{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:30px 26px;position:relative;overflow:hidden;
  transition:border-color .3s,transform .3s var(--ease)}
.step:hover{border-color:var(--border-strong);transform:translateY(-4px)}
.step .idx{font-family:var(--font-mono);font-size:13px;color:var(--g-yellow);letter-spacing:.1em}
.step h3{font-size:21px;margin:14px 0 9px}
.step p{color:var(--text-2);font-size:15px}
.step .bar{position:absolute;left:0;top:0;height:3px;width:100%;background:var(--energy);opacity:.55}

/* features */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature{
  background:linear-gradient(180deg,var(--surface),transparent);border:1px solid var(--border);
  border-radius:var(--radius);padding:32px 28px;transition:border-color .3s,transform .3s var(--ease),box-shadow .3s;position:relative;overflow:hidden}
.feature:hover{border-color:var(--border-strong);transform:translateY(-5px);box-shadow:0 30px 60px -30px rgba(0,0,0,.7)}
.feature .ic{
  width:56px;height:56px;border-radius:14px;display:grid;place-items:center;margin-bottom:22px;
  background:var(--surface-2);border:1px solid var(--border);position:relative}
.feature .ic svg{width:28px;height:28px}
.feature h3{font-size:22px;margin-bottom:11px}
.feature p{color:var(--text-2);font-size:15px}
.feature .fmeta{margin-top:18px;display:flex;gap:8px;flex-wrap:wrap}

/* ============ Energy Bridge spotlight ============ */
.bridge-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:50px;align-items:center}
.bridge-media{
  position:relative;border-radius:22px;padding:40px;border:1px solid var(--border);
  background:radial-gradient(120% 120% at 50% 40%, rgba(255,255,255,.08), rgba(255,255,255,.01) 70%);
  display:grid;place-items:center}
.bridge-media img{filter:drop-shadow(0 30px 50px rgba(0,0,0,.6));border-radius:8px}
.bridge-media .glow{position:absolute;inset:0;border-radius:22px;background:radial-gradient(60% 50% at 50% 50%,rgba(25,184,74,.16),transparent 70%)}
.spec-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:26px}
.spec{display:flex;align-items:center;gap:11px;font-size:14.5px;color:var(--text-2)}
.spec .dot{width:8px;height:8px;border-radius:50%;background:var(--energy);flex-shrink:0}

/* ============ Regulators ============ */
.reg-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.reg{
  background:var(--bg-1);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  transition:transform .35s var(--ease),border-color .3s;display:flex;flex-direction:column}
.reg:hover{transform:translateY(-6px);border-color:var(--border-strong)}
.reg-photo{aspect-ratio:1;background:#111;display:grid;place-items:center;overflow:hidden;position:relative}
.reg-photo img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.reg:hover .reg-photo img{transform:scale(1.05)}
.reg-photo .badge{position:absolute;top:14px;left:14px;font-family:var(--font-display);font-weight:700;font-size:15px;background:var(--red);color:#fff;padding:5px 12px;border-radius:8px}
.reg-body{padding:22px 22px 26px}
.reg-body h3{font-size:21px;margin-bottom:7px}
.reg-body .role{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-3);margin-bottom:12px}
.reg-body p{color:var(--text-2);font-size:14.5px}

/* ============ Dashboard preview ============ */
.dash-wrap{position:relative;border-radius:22px;border:1px solid var(--border);overflow:hidden;background:var(--bg-1);box-shadow:0 50px 100px -50px #000}
.dash-bar{display:flex;align-items:center;gap:8px;padding:14px 18px;border-bottom:1px solid var(--border);background:var(--bg-2)}
.dash-bar .dots{display:flex;gap:7px}
.dash-bar .dots i{width:11px;height:11px;border-radius:50%;background:var(--surface-2);display:block}
.dash-bar .url{font-family:var(--font-mono);font-size:12px;color:var(--text-3);margin-left:8px}
.dash-body{display:grid;grid-template-columns:188px 1fr;min-height:470px}
/* sidebar — navy app nav */
.dash-side{display:flex;flex-direction:column;gap:4px;background:#161c33;padding:18px 14px;border-right:1px solid var(--border)}
.dash-side .dash-logo{height:30px;width:auto;align-self:flex-start;object-fit:contain;margin:2px 4px 16px}
.dash-side .si{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:9px;font-size:13px;color:#9aa6c4;cursor:default}
.dash-side .si.on{background:rgba(255,255,255,.07);color:#fff}
.dash-side .si .sq{width:7px;height:7px;border-radius:50%;background:rgba(255,255,255,.2)}
.dash-side .si.on .sq{background:var(--energy)}
.dash-main{display:flex;flex-direction:column;gap:16px;padding:22px}
/* device header */
.dev-head{display:flex;align-items:center;justify-content:space-between;gap:14px;padding-bottom:16px;border-bottom:1px solid var(--border)}
.dev-id{display:flex;flex-direction:column;gap:4px}
.dev-name{font-family:var(--font-display);font-size:19px;font-weight:600}
.dev-sub{font-family:var(--font-mono);font-size:11.5px;color:var(--text-3)}
.dev-status{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--g-green);background:rgba(25,184,74,.1);border:1px solid rgba(25,184,74,.28);padding:6px 13px;border-radius:100px;white-space:nowrap}
.dev-status .d{width:8px;height:8px;border-radius:50%;background:var(--g-green);box-shadow:0 0 9px var(--g-green)}
/* tabs */
.dev-tabs{display:flex;gap:6px;flex-wrap:wrap}
.dtab{font-size:13px;color:var(--text-3);padding:7px 14px;border-radius:9px;border:1px solid transparent;white-space:nowrap}
.dtab.on{color:var(--text);background:var(--surface-2);border-color:var(--border)}
/* gauges */
.gauges{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.gauge{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px 12px 14px;display:flex;flex-direction:column;align-items:center;gap:6px}
.g-title{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-2);white-space:nowrap}
.g-dial{position:relative;width:108px;height:108px}
.g-dial svg{width:100%;height:100%;display:block}
.g-track{fill:none;stroke:rgba(255,255,255,.09);stroke-width:9;stroke-linecap:round}
.g-val{fill:none;stroke-width:9;stroke-linecap:round}
.g-val.good{stroke:var(--g-green);filter:drop-shadow(0 0 5px rgba(25,184,74,.5))}
.g-val.mid{stroke:var(--g-yellow);filter:drop-shadow(0 0 5px rgba(255,210,0,.4))}
.g-center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px}
.g-num{font-family:var(--font-display);font-size:25px;font-weight:600;line-height:1}
.g-unit{font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;color:var(--text-3)}
.g-minmax{display:flex;justify-content:space-between;width:100%;padding:0 6px;font-family:var(--font-mono);font-size:9.5px;color:var(--text-3)}
.dchart{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px;min-height:170px;display:flex;flex-direction:column}
.dchart .ct{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;gap:10px;flex-wrap:wrap}
.dchart .ct h4{font-family:var(--font-display);font-size:15px;font-weight:600}
.dchart .ct .legend{font-family:var(--font-mono);font-size:11px;color:var(--text-3)}
.dash-note{position:absolute;bottom:16px;right:16px;font-family:var(--font-mono);font-size:11px;color:var(--text-3);background:rgba(8,11,16,.7);padding:6px 11px;border-radius:8px;border:1px solid var(--border)}

/* ============ Demo "coming soon" modal ============ */
.demo-modal{position:fixed;inset:0;z-index:80;display:none;align-items:center;justify-content:center;padding:24px;background:rgba(4,6,10,.72);backdrop-filter:blur(6px)}
.demo-modal.open{display:flex}
.demo-card{position:relative;max-width:440px;width:100%;background:var(--bg-1);border:1px solid var(--border-strong);border-radius:20px;padding:38px 32px 30px;text-align:center;box-shadow:0 40px 90px -30px #000}
.demo-card .demo-ic{width:60px;height:60px;margin:0 auto 16px;border-radius:50%;display:grid;place-items:center;background:var(--surface-2);border:1px solid var(--border)}
.demo-card .demo-pill{display:inline-block;white-space:nowrap;font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;color:var(--g-yellow);background:rgba(255,210,0,.12);border:1px solid rgba(255,210,0,.3);padding:4px 10px;border-radius:100px;margin-bottom:14px}
.demo-card h3{font-size:24px;margin-bottom:12px}
.demo-card p{color:var(--text-2);font-size:15.5px;margin-bottom:24px}
.demo-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.demo-x{position:absolute;top:14px;right:14px;width:34px;height:34px;border-radius:9px;background:var(--surface);border:1px solid var(--border);color:var(--text-2);font-size:20px;cursor:pointer;line-height:1;transition:.2s}
.demo-x:hover{color:var(--text);border-color:var(--border-strong)}

/* ============ CTA band ============ */
.cta-band{
  border:1px solid var(--border);border-radius:26px;padding:64px 48px;text-align:center;position:relative;overflow:hidden;
  background:radial-gradient(120% 160% at 50% 0%, rgba(226,0,26,.18), transparent 55%),var(--bg-1)}
.cta-band::after{content:"";position:absolute;left:0;bottom:0;height:4px;width:100%;background:var(--energy)}
.cta-band h2{font-size:clamp(28px,4vw,46px);margin-bottom:16px}
.cta-band p{color:var(--text-2);max-width:560px;margin:0 auto 30px;font-size:17px}
.cta-band .hero-cta{justify-content:center}

/* ============ Footer ============ */
.footer{border-top:1px solid var(--border);padding:60px 0 36px;margin-top:40px}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:46px}
.footer .f-logo img{height:42px;margin-bottom:18px}
.footer .f-logo p{color:var(--text-2);font-size:14.5px;max-width:320px}
.footer-col h4{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-3);margin-bottom:16px}
.footer-col a{display:block;color:var(--text-2);font-size:14.5px;padding:5px 0;transition:color .2s}
.footer-col a:hover{color:var(--text)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-top:26px;border-top:1px solid var(--border);flex-wrap:wrap}
.footer-bottom .de img{height:30px;opacity:.9}
.footer-bottom .cr{font-family:var(--font-mono);font-size:12px;color:var(--text-3)}

/* ============ responsive ============ */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .bridge-grid{grid-template-columns:1fr;gap:36px}
  .steps,.features,.reg-grid{grid-template-columns:1fr}
  .nav,.header-actions .btn{display:none}
  .header-actions .lang{display:flex}
  .header-actions .menu-toggle{display:grid;place-items:center}
  .header-actions{gap:10px}
  .footer-top{grid-template-columns:1fr;gap:30px}
  .dash-body{grid-template-columns:1fr}
  .dash-side{flex-direction:row;overflow-x:auto;gap:6px;border-right:none;border-bottom:1px solid var(--border)}
  .dash-side .dash-logo{display:none}
  .dash-side .si{white-space:nowrap}
  .gauges{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  .wrap{padding:0 20px}
  .hero{padding:150px 0 50px}
  .gauges{grid-template-columns:1fr 1fr}
  .cta-band{padding:48px 24px}
  .hero-cta .btn{flex:1;justify-content:center}
  .promo-inner{gap:8px 12px;padding:7px 18px}
  .promo-text{font-size:12px}
  .promo-pill{display:none}
  .brand .by{padding-left:11px;gap:7px}
  .brand .by .by-lbl{display:none}
  .brand .by img{height:19px}
}