/* ============================================================
   Phantrium Network — cyan-accented engineering theme
   ============================================================ */
:root{
  --bg:#070d12;
  --bg-2:#0a141c;
  --panel:#0e1b25;
  --panel-2:#102330;
  --line:#15303d;
  --ink:#e8f6fb;
  --muted:#8fb0bf;
  --cyan:#06b6d4;
  --cyan-bright:#22d3ee;
  --cyan-soft:#67e8f9;
  --teal:#0e7490;
  --radius:16px;
  --shadow:0 20px 50px -20px rgba(0,0,0,.7);
  --glow:0 0 0 1px rgba(34,211,238,.18), 0 12px 40px -12px rgba(6,182,212,.35);
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
.container{width:min(var(--maxw),92%);margin-inline:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.15;letter-spacing:-.02em;font-weight:800}
.grad{background:linear-gradient(120deg,var(--cyan-bright),var(--cyan-soft));-webkit-background-clip:text;background-clip:text;color:transparent}
em{font-style:normal;color:var(--cyan-soft)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6em;
  background:linear-gradient(120deg,var(--cyan),var(--cyan-bright));
  color:#04222c;font-weight:700;
  padding:.75rem 1.35rem;border-radius:999px;border:0;cursor:pointer;
  font-size:.95rem;transition:transform .15s ease,box-shadow .25s ease,filter .2s;
  box-shadow:0 8px 26px -10px rgba(34,211,238,.6);
}
.btn:hover{transform:translateY(-2px);filter:brightness(1.07);box-shadow:0 14px 34px -10px rgba(34,211,238,.75)}
.btn-lg{padding:.95rem 1.7rem;font-size:1.02rem}
.btn-sm{padding:.5rem 1rem;font-size:.88rem}
.btn-block{width:100%;justify-content:center}
.btn-ghost{background:transparent;color:var(--cyan-soft);box-shadow:inset 0 0 0 1px var(--line)}
.btn-ghost:hover{box-shadow:inset 0 0 0 1px var(--cyan);background:rgba(34,211,238,.06)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(7,13,18,.82);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:900;font-size:1.22rem;letter-spacing:-.03em}
.brand-mark{
  display:grid;place-items:center;width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--cyan),var(--teal));color:#04222c;font-size:1.05rem;
  box-shadow:0 0 22px -4px rgba(34,211,238,.6);
}
.brand-accent{color:var(--cyan-bright)}
.nav-links{display:flex;align-items:center;gap:1.6rem}
.nav-links a{color:var(--muted);font-weight:500;font-size:.95rem;transition:color .15s}
.nav-links a:hover{color:var(--ink)}
.nav-links a.btn{color:#04222c}
.nav-toggle{display:none;background:none;border:0;color:var(--ink);font-size:1.4rem;cursor:pointer}

/* ---------- Language switcher ---------- */
.lang-switch{display:inline-flex;gap:2px;margin-left:.5rem;background:var(--bg-2);border:1px solid var(--line);border-radius:999px;padding:3px}
.lang-btn{background:none;border:0;color:var(--muted);font-size:.78rem;font-weight:700;letter-spacing:.03em;padding:.3rem .55rem;border-radius:999px;cursor:pointer;transition:color .15s,background .15s}
.lang-btn:hover{color:var(--ink)}
.lang-btn.active{background:linear-gradient(120deg,var(--cyan),var(--cyan-bright));color:#04222c}

/* ---------- Cookie consent ---------- */
.cookie-banner{position:fixed;left:50%;bottom:18px;transform:translate(-50%,140%);width:min(720px,94%);z-index:80;
  background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow);padding:1.1rem 1.3rem;display:flex;align-items:center;gap:1.2rem;flex-wrap:wrap;
  transition:transform .35s cubic-bezier(.2,.8,.2,1);opacity:0}
.cookie-banner.show{transform:translate(-50%,0);opacity:1}
.cookie-banner p{color:var(--muted);font-size:.9rem;line-height:1.5;flex:1;min-width:240px;margin:0}
.cookie-actions{display:flex;gap:.6rem;flex-shrink:0}
.cookie-reject{background:transparent;color:var(--cyan-soft);box-shadow:inset 0 0 0 1px var(--line)}
.cookie-reject:hover{box-shadow:inset 0 0 0 1px var(--cyan);background:rgba(34,211,238,.06)}
@media(max-width:560px){.cookie-banner{flex-direction:column;align-items:stretch;text-align:left}.cookie-actions{justify-content:flex-end}}

/* ---------- Hero ---------- */
.hero{position:relative;padding:clamp(3.5rem,8vw,7rem) 0 4.5rem;overflow:hidden}
.hero-grid-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(900px 460px at 78% -8%,rgba(6,182,212,.22),transparent 60%),
    radial-gradient(700px 400px at 8% 110%,rgba(14,116,144,.18),transparent 60%),
    linear-gradient(transparent 95%,rgba(34,211,238,.07) 95%) 0 0/100% 34px,
    linear-gradient(90deg,transparent 95%,rgba(34,211,238,.07) 95%) 0 0/34px 100%;
}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:3rem;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:.55rem;
  font-size:.82rem;font-weight:600;color:var(--cyan-soft);
  background:rgba(34,211,238,.08);border:1px solid var(--line);
  padding:.4rem .9rem;border-radius:999px;margin-bottom:1.3rem;
}
.hero h1{font-size:clamp(2.4rem,5.4vw,4rem);font-weight:900;margin-bottom:1.1rem}
.lead{font-size:clamp(1.02rem,1.6vw,1.18rem);color:var(--muted);max-width:42ch;margin-bottom:1.9rem}
.hero-cta{display:flex;gap:.9rem;flex-wrap:wrap;margin-bottom:2.4rem}
.hero-stats{display:flex;gap:2.2rem;flex-wrap:wrap}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats strong{font-size:1.5rem;font-weight:800;color:var(--cyan-bright);line-height:1}
.hero-stats span{font-size:.82rem;color:var(--muted);margin-top:.3rem}
.hero-stats small{display:block;font-size:.72rem;opacity:.7;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.hero-stats span[data-i18n]{display:inline}

/* rack visual */
.hero-visual{display:grid;place-items:center}
.rack{
  width:100%;max-width:340px;background:linear-gradient(180deg,var(--panel),var(--bg-2));
  border:1px solid var(--line);border-radius:18px;padding:1rem;
  box-shadow:var(--shadow);display:flex;flex-direction:column;gap:.7rem;
}
.rack-unit{
  display:flex;align-items:center;gap:.85rem;
  background:linear-gradient(90deg,var(--panel-2),rgba(16,35,48,.4));
  border:1px solid var(--line);border-radius:10px;padding:.7rem .85rem;
  font-size:.9rem;color:var(--ink);position:relative;
}
.rack-unit i.fa-solid{color:var(--cyan-soft);width:20px;text-align:center}
.rack-unit span{flex:1;font-weight:500;color:var(--muted)}
.rack-unit.dim{opacity:.65}
.led{width:9px;height:9px;border-radius:50%;background:#1de9b6;box-shadow:0 0 8px #1de9b6;display:inline-block}
.led.blink{background:var(--cyan-bright);box-shadow:0 0 9px var(--cyan-bright);animation:blink 1.4s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}

/* ---------- Trust strip ---------- */
.strip{border-block:1px solid var(--line);background:var(--bg-2)}
.strip-inner{display:flex;flex-wrap:wrap;gap:1.4rem 2.2rem;justify-content:center;padding:1.1rem 0}
.strip-inner span{color:var(--muted);font-size:.9rem;font-weight:500;display:inline-flex;align-items:center;gap:.5rem}
.strip-inner i{color:var(--cyan)}

/* ---------- Sections ---------- */
.section{padding:clamp(3.5rem,7vw,6rem) 0}
.section-alt{background:var(--bg-2)}
.section-head{max-width:62ch;margin:0 auto 3rem;text-align:center}
.kicker{display:inline-block;color:var(--cyan-bright);font-weight:700;font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;margin-bottom:.8rem}
.section-head h2{font-size:clamp(1.8rem,3.6vw,2.6rem);margin-bottom:1rem}
.section-head p{color:var(--muted);font-size:1.05rem}

/* ---------- Cards ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:1.4rem}
.card{
  background:linear-gradient(180deg,var(--panel),var(--bg-2));
  border:1px solid var(--line);border-radius:var(--radius);padding:1.7rem;
  transition:transform .2s ease,box-shadow .25s ease,border-color .2s;
  position:relative;overflow:hidden;
}
.card::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:linear-gradient(90deg,var(--cyan),transparent);opacity:0;transition:opacity .25s}
.card:hover{transform:translateY(-5px);border-color:rgba(34,211,238,.4);box-shadow:var(--glow)}
.card:hover::before{opacity:1}
.card-icon{
  width:52px;height:52px;border-radius:13px;display:grid;place-items:center;
  background:rgba(34,211,238,.1);color:var(--cyan-bright);font-size:1.35rem;margin-bottom:1.1rem;
  border:1px solid var(--line);
}
.card h3{font-size:1.22rem;margin-bottom:.6rem}
.card p{color:var(--muted);font-size:.96rem;margin-bottom:1rem}
.ticks{list-style:none;display:flex;flex-direction:column;gap:.45rem}
.ticks li{position:relative;padding-left:1.6rem;font-size:.9rem;color:var(--ink)}
.ticks li::before{content:"\f00c";font-family:"Font Awesome 6 Free";font-weight:900;position:absolute;left:0;top:.05rem;color:var(--cyan);font-size:.78rem}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.3rem}
.step{
  background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);
  border-radius:var(--radius);padding:1.7rem;position:relative;
}
.step-no{font-family:'JetBrains Mono',monospace;font-size:2.2rem;font-weight:600;color:rgba(34,211,238,.25);position:absolute;top:1rem;right:1.3rem}
.step h3{font-size:1.1rem;margin-bottom:.5rem;display:flex;align-items:center;gap:.6rem}
.step h3 i{color:var(--cyan-bright)}
.step p{color:var(--muted);font-size:.93rem}

/* ---------- Knowledge base ---------- */
.kb{max-width:840px;margin-inline:auto;display:flex;flex-direction:column;gap:.85rem}
.kb-item{background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);border-radius:13px;overflow:hidden}
.kb-item summary{
  list-style:none;cursor:pointer;padding:1.1rem 1.4rem;font-weight:600;font-size:1.04rem;
  display:flex;align-items:center;gap:.85rem;transition:color .15s;
}
.kb-item summary::-webkit-details-marker{display:none}
.kb-item summary i{color:var(--cyan-bright);width:22px;text-align:center}
.kb-item summary::after{content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;margin-left:auto;color:var(--muted);font-size:.8rem;transition:transform .2s}
.kb-item[open] summary::after{transform:rotate(180deg)}
.kb-item[open] summary{color:var(--cyan-soft)}
.kb-body{padding:0 1.4rem 1.3rem 3.1rem}
.kb-body p{color:var(--muted);font-size:.96rem}
.kb-body strong{color:var(--ink)}

/* ---------- Why ---------- */
.why{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.3rem}
.why-item{padding:1.5rem;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(180deg,var(--panel),var(--bg-2))}
.why-item i{font-size:1.5rem;color:var(--cyan-bright);margin-bottom:.8rem;display:block}
.why-item h3{font-size:1.1rem;margin-bottom:.45rem}
.why-item p{color:var(--muted);font-size:.93rem}

/* ---------- CTA ---------- */
.cta{padding:clamp(3.5rem,7vw,6rem) 0;background:
  radial-gradient(700px 380px at 85% 10%,rgba(6,182,212,.16),transparent 60%),var(--bg-2);
  border-top:1px solid var(--line)}
.cta-inner{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start}
.cta-copy h2{font-size:clamp(1.8rem,3.4vw,2.5rem);margin-bottom:1rem}
.cta-copy p{color:var(--muted);margin-bottom:1.6rem;max-width:46ch}
.contact-list{list-style:none;display:flex;flex-direction:column;gap:.85rem}
.contact-list li{display:flex;align-items:center;gap:.8rem;color:var(--ink)}
.contact-list i{color:var(--cyan-bright);width:20px;text-align:center}
.contact-list a:hover{color:var(--cyan-soft)}
.cta-form{background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem;box-shadow:var(--shadow)}
.field{margin-bottom:1rem;display:flex;flex-direction:column;gap:.4rem}
.field label{font-size:.85rem;font-weight:600;color:var(--muted)}
.field input,.field select,.field textarea{
  background:var(--bg);border:1px solid var(--line);border-radius:10px;
  padding:.75rem .9rem;color:var(--ink);font-family:inherit;font-size:.95rem;transition:border-color .15s,box-shadow .15s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.15)}
.field textarea{resize:vertical}
.form-note{margin-top:.9rem;font-size:.9rem;padding:.7rem .9rem;border-radius:9px;background:rgba(34,211,238,.1);color:var(--cyan-soft);border:1px solid var(--line)}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg);border-top:1px solid var(--line);padding-top:3rem}
.footer-inner{display:grid;grid-template-columns:1.4fr 2fr;gap:2.5rem;padding-bottom:2.2rem}
.footer-tag{color:var(--muted);font-size:.92rem;margin-top:.9rem;max-width:34ch}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.footer-cols h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.12em;color:var(--cyan-bright);margin-bottom:.9rem}
.footer-cols a{display:block;color:var(--muted);font-size:.92rem;padding:.22rem 0;transition:color .15s}
.footer-cols a:hover{color:var(--ink)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.6rem;border-top:1px solid var(--line);padding:1.3rem 0;color:var(--muted);font-size:.85rem}
.footer-bottom i{color:var(--cyan)}

/* ---------- Responsive ---------- */
@media(max-width:880px){
  .hero-inner{grid-template-columns:1fr;gap:2.5rem}
  .hero-visual{order:-1;max-width:340px}
  .cta-inner{grid-template-columns:1fr;gap:2rem}
  .footer-inner{grid-template-columns:1fr;gap:1.8rem}
  .nav-links{
    position:fixed;inset:68px 0 auto 0;flex-direction:column;gap:0;
    background:rgba(7,13,18,.97);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);
    padding:.6rem 0;transform:translateY(-130%);transition:transform .28s ease;
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:.85rem 7%;width:100%;border-bottom:1px solid var(--line)}
  .nav-links a.btn{margin:.6rem 7%;width:auto;justify-content:center}
  .lang-switch{margin:.6rem 7%;align-self:flex-start}
  .nav-toggle{display:block}
}
@media(max-width:520px){
  .footer-cols{grid-template-columns:1fr 1fr}
  .hero-stats{gap:1.4rem}
}