:root{
  --primary:#22D3EE;
  --primary-dark:#0891B2;
  --accent:#A3E635;
  --bg:#070B16;
  --bg-alt:#0E1525;
  --bg-card:#121A2E;
  --text:#E2E8F0;
  --text-muted:#94A3B8;
  --border:rgba(34,211,238,.15);
  --border-strong:rgba(34,211,238,.4);
  --grid:rgba(34,211,238,.06);
  --radius:0px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden;
  background-image:
    linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:48px 48px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
h1,h2,h3,h4{font-family:'Space Grotesk','DM Sans',sans-serif;font-weight:700;line-height:1.1;letter-spacing:-.025em;color:#FFFFFF}
h1{font-size:clamp(2.2rem,5.2vw,3.9rem)}
h2{font-size:clamp(1.8rem,3.6vw,2.7rem)}
h3{font-size:1.18rem}

.site-header{position:sticky;top:0;background:rgba(7,11,22,.85);backdrop-filter:blur(14px);z-index:50;border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:18px 0}
.brand{display:flex;align-items:center;gap:12px;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1.3rem;color:#fff}
.brand img{width:36px;height:36px}
.brand .em{color:var(--primary)}
.nav-links{display:flex;gap:30px;list-style:none;align-items:center}
.nav-links a{font-size:.94rem;color:var(--text-muted);font-weight:500;transition:color .2s;text-transform:uppercase;letter-spacing:.06em}
.nav-links a:not(.nav-cta):hover{color:var(--primary)}
.nav-links a.nav-cta{color:#000000;font-weight:800;background:var(--primary);padding:11px 22px;text-transform:uppercase;letter-spacing:.08em;font-size:.82rem;transition:all .2s}
.nav-links a.nav-cta:hover{background:#67E8F9;box-shadow:0 0 28px rgba(34,211,238,.5)}
.burger{display:none;background:none;border:0;width:42px;height:42px;flex-direction:column;gap:5px;cursor:pointer;align-items:center;justify-content:center}
.burger span{display:block;width:22px;height:2px;background:var(--text)}
.mobile-menu{display:none;flex-direction:column;background:var(--bg-alt);border-bottom:1px solid var(--border);padding:20px 24px}
.mobile-menu.is-open{display:flex}
.mobile-menu a{padding:10px 0;color:var(--text);font-weight:500;text-transform:uppercase;letter-spacing:.06em;font-size:.92rem}
.mobile-menu a.nav-cta{background:var(--primary);color:#000;font-weight:800;text-align:center;margin-top:10px;padding:12px 20px;letter-spacing:.08em}

/* Sharp-corner buttons */
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 28px;font-weight:700;font-size:.94rem;cursor:pointer;border:0;transition:all .2s;font-family:'Space Grotesk',sans-serif;text-transform:uppercase;letter-spacing:.08em;border-radius:0}
.btn-primary{background:var(--primary);color:#0A0F1E;position:relative}
.btn-primary::after{content:"→";font-family:'DM Sans',sans-serif;font-size:1.2rem;transition:transform .25s}
.btn-primary:hover{background:#67E8F9;box-shadow:0 0 32px rgba(34,211,238,.6)}
.btn-primary:hover::after{transform:translateX(4px)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border-strong)}
.btn-ghost:hover{background:rgba(34,211,238,.08);border-color:var(--primary);color:var(--primary)}

/* Hero — wireframe tube */
.hero{padding:80px 0 100px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;width:800px;height:800px;border-radius:50%;background:radial-gradient(circle,rgba(34,211,238,.16),transparent 60%);top:-300px;right:-200px;z-index:0}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;background:transparent;color:var(--primary);font-size:.82rem;font-weight:700;margin-bottom:24px;border:1px solid var(--border-strong);text-transform:uppercase;letter-spacing:.14em;font-family:'Space Grotesk',sans-serif}
.hero-badge::before{content:"";width:6px;height:6px;background:var(--accent);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{50%{opacity:.4}}
.hero h1{margin-bottom:24px}
.hero h1 .accent{color:var(--primary)}
.hero h1 .mono{font-family:'JetBrains Mono','Space Grotesk',monospace;font-weight:500;color:var(--accent)}
.hero-desc{font-size:1.12rem;color:var(--text-muted);max-width:560px;margin-bottom:32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:46px}
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0;max-width:520px;border:1px solid var(--border);background:rgba(18,26,46,.5)}
.spec-cell{padding:18px 22px;border-right:1px solid var(--border);border-bottom:1px solid var(--border)}
.spec-cell:nth-child(2n){border-right:0}
.spec-cell:nth-last-child(-n+2){border-bottom:0}
.spec-cell .lbl{font-size:.74rem;color:var(--text-muted);letter-spacing:.16em;text-transform:uppercase;margin-bottom:6px;font-family:'Space Grotesk',sans-serif}
.spec-cell .val{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1.4rem;color:#fff}
.spec-cell .val em{color:var(--primary);font-style:normal}

/* Tube visual */
.hero-visual{position:relative;display:grid;place-items:center}
.tube-wrap{width:100%;max-width:380px;aspect-ratio:1/1;position:relative}
.tube{position:absolute;top:50%;left:50%;border:2px solid var(--primary);border-radius:50%;animation:tube-rotate 12s linear infinite}
.tube:nth-child(1){width:90%;height:90%;transform:translate(-50%,-50%)}
.tube:nth-child(2){width:75%;height:75%;transform:translate(-50%,-50%);border-color:var(--accent);animation-duration:14s;animation-direction:reverse}
.tube:nth-child(3){width:55%;height:55%;transform:translate(-50%,-50%);border-color:rgba(34,211,238,.5);border-style:dashed}
.tube:nth-child(4){width:35%;height:35%;transform:translate(-50%,-50%);border-color:var(--accent);border-width:3px}
.tube-core{position:absolute;top:50%;left:50%;width:60px;height:60px;background:linear-gradient(135deg,var(--primary),var(--accent));transform:translate(-50%,-50%);box-shadow:0 0 40px rgba(34,211,238,.8);display:grid;place-items:center;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:.8rem;color:#0A0F1E;letter-spacing:.06em}
@keyframes tube-rotate{from{transform:translate(-50%,-50%) rotate(0)}to{transform:translate(-50%,-50%) rotate(360deg)}}

/* Sections */
section{padding:80px 0;position:relative}
section.alt{background:var(--bg-alt)}
.section-head{max-width:680px;margin:0 0 50px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:.78rem;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--primary);margin-bottom:18px;font-family:'Space Grotesk',sans-serif}
.eyebrow::before{content:"//";color:var(--accent)}
.section-head h2{margin-bottom:14px}
.section-head p{color:var(--text-muted);font-size:1.05rem}

/* Cards — sharp border + corner accent */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:0;border:1px solid var(--border);background:rgba(18,26,46,.3)}
.feature-card{padding:34px 28px;border-right:1px solid var(--border);border-bottom:1px solid var(--border);transition:.25s;position:relative;background:transparent}
.feature-card:nth-child(3n){border-right:0}
.feature-card:nth-last-child(-n+3){border-bottom:0}
.feature-card:hover{background:rgba(34,211,238,.04)}
.feature-card:hover .feature-num{color:var(--primary)}
.feature-num{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:.82rem;letter-spacing:.16em;color:var(--text-muted);margin-bottom:16px;display:block;transition:color .25s}
.feature-card h3{margin-bottom:10px;color:#fff}
.feature-card p{color:var(--text-muted);font-size:.95rem}

/* Platforms */
.platforms-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}
.platform-card{background:var(--bg-card);border:1px solid var(--border);padding:24px 20px;text-align:center;transition:.2s;position:relative}
.platform-card::before{content:"";position:absolute;top:0;left:0;width:18px;height:18px;border-top:2px solid var(--primary);border-left:2px solid var(--primary);transition:.2s}
.platform-card::after{content:"";position:absolute;bottom:0;right:0;width:18px;height:18px;border-bottom:2px solid var(--primary);border-right:2px solid var(--primary);transition:.2s}
.platform-card:hover{background:rgba(34,211,238,.05);border-color:var(--border-strong)}
.platform-card:hover::before,.platform-card:hover::after{width:24px;height:24px}
.platform-icon{width:48px;height:48px;background:transparent;border:1px solid var(--primary);display:grid;place-items:center;color:var(--primary);font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1.2rem;margin:0 auto 14px}
.platform-card h3{margin-bottom:5px;font-size:1.02rem}
.platform-card p{color:var(--text-muted);font-size:.84rem;font-family:'Space Grotesk',sans-serif;letter-spacing:.04em}

/* Why */
.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.why-card{padding:30px 28px;background:rgba(18,26,46,.5);border:1px solid var(--border);position:relative}
.why-card .marker{position:absolute;top:-1px;left:-1px;padding:6px 14px;background:var(--primary);color:#0A0F1E;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:.8rem;letter-spacing:.1em}
.why-card h3{margin-top:24px;margin-bottom:10px;color:#fff}
.why-card p{color:var(--text-muted)}

/* CTA */
.cta-banner{background:linear-gradient(135deg,#0E1525 0%,#121A2E 100%);border:1px solid var(--border-strong);padding:60px 50px;position:relative;overflow:hidden}
.cta-banner::before{content:"";position:absolute;top:0;left:0;width:80px;height:80px;border-top:3px solid var(--primary);border-left:3px solid var(--primary)}
.cta-banner::after{content:"";position:absolute;bottom:0;right:0;width:80px;height:80px;border-bottom:3px solid var(--accent);border-right:3px solid var(--accent)}
.cta-banner h2{margin-bottom:14px}
.cta-banner p{color:var(--text-muted);font-size:1.05rem;margin-bottom:24px;max-width:600px}

/* Steps */
.steps-wrap{display:flex;flex-direction:column;gap:0;max-width:920px;margin:0 auto;border:1px solid var(--border)}
.step-card{padding:42px 36px;border-bottom:1px solid var(--border);display:grid;grid-template-columns:120px 1fr;gap:36px;align-items:start;transition:.25s;background:rgba(18,26,46,.3)}
.step-card:last-child{border-bottom:0}
.step-card:hover{background:rgba(34,211,238,.04)}
.step-num{font-family:'Space Grotesk',sans-serif;font-weight:700;color:var(--primary);font-size:.9rem;letter-spacing:.16em;border-top:2px solid var(--primary);padding-top:14px}
.step-card h2{margin-bottom:14px}
.step-card p{color:var(--text-muted);margin-bottom:10px}
.step-card .btn{margin-top:18px}

/* FAQ — terminal-like */
.faq-list{display:flex;flex-direction:column;gap:0;max-width:880px;margin:0 auto;border:1px solid var(--border)}
.faq-item{border-bottom:1px solid var(--border);background:rgba(18,26,46,.3);transition:background .2s}
.faq-item:last-child{border-bottom:0}
.faq-item.is-open{background:rgba(34,211,238,.05)}
.faq-q{padding:22px 28px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-family:'Space Grotesk',sans-serif;font-weight:600;color:#fff;font-size:1.02rem}
.faq-q::before{content:">";color:var(--primary);margin-right:14px;font-family:'JetBrains Mono',monospace}
.faq-q::after{content:"[+]";font-family:'JetBrains Mono',monospace;color:var(--primary);font-size:.9rem;transition:transform .25s}
.faq-item.is-open .faq-q::after{content:"[-]"}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;color:var(--text-muted);padding:0 28px}
.faq-a p{padding:0 0 22px 32px;border-left:1px dashed var(--border)}

/* Footer */
.site-footer{background:#040711;color:var(--text-muted);padding:60px 0 0;border-top:1px solid var(--border)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px;padding-bottom:40px;border-bottom:1px solid var(--border)}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-family:'Space Grotesk',sans-serif;font-weight:700;color:#fff;font-size:1.2rem;margin-bottom:14px}
.footer-brand img{width:32px;height:32px}
.footer-about{font-size:.93rem;line-height:1.6;color:var(--text-muted)}
.footer-col h4{color:var(--primary);font-size:.85rem;margin-bottom:14px;font-family:'Space Grotesk',sans-serif;text-transform:uppercase;letter-spacing:.14em}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:8px}
.footer-col a{color:var(--text-muted);font-size:.93rem;transition:.2s}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{padding:22px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.82rem;color:#576275;font-family:'Space Grotesk',sans-serif;letter-spacing:.08em;text-transform:uppercase}

.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:translateY(0)}

@media(max-width:920px){
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{max-width:340px;margin:0 auto}
  .nav-links{display:none}
  .burger{display:flex}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .step-card{grid-template-columns:1fr;padding:28px;gap:12px}
  .why-grid{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr 1fr}
  .feature-card:nth-child(3n){border-right:1px solid var(--border)}
  .feature-card:nth-child(even){border-right:0}
  .feature-card:nth-last-child(-n+3){border-bottom:1px solid var(--border)}
  .feature-card:nth-last-child(-n+2){border-bottom:0}
  .cta-banner{padding:40px 24px}
}
@media(max-width:560px){
  .footer-grid{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .feature-card{border-right:0 !important;border-bottom:1px solid var(--border) !important}
  .feature-card:last-child{border-bottom:0 !important}
  .spec-grid{grid-template-columns:1fr}
  .spec-cell{border-right:0;border-bottom:1px solid var(--border)}
  .spec-cell:last-child{border-bottom:0}
}