:root{
  --bg: #0f172a;
  --surface: #0b1220;
  --muted: #9aa4b2;
  --accent1: #0ea5a3; /* teal */
  --accent2: #3b82f6; /* blue */
  --card: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.02));
  --radius: 12px;
  --max-width: 1100px;
  --glass: rgba(255,255,255,0.03);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background: linear-gradient(180deg, #071226 0%, #07111b 45%), #071226;
  color: #e6eef8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.45;
  font-size:16px;
}

.container{
  width:90%;
  max-width:var(--max-width);
  margin:0 auto;
  padding:2rem 0;
}

/* Header */
.site-header{
  backdrop-filter: blur(6px);
  position:sticky;
  top:0;
  z-index:40;
  background: linear-gradient(180deg, rgba(7,18,38,0.7), rgba(7,11,27,0.5));
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.header-grid{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:0.75rem 0}
.logo{display:flex;align-items:center;gap:.6rem;color:inherit;text-decoration:none}
.logo-text{font-weight:700;letter-spacing:0.02em}
.nav{position:fixed;inset:0;background:linear-gradient(180deg, rgba(2,6,23,0.95), rgba(2,6,23,0.98));padding:2.5rem;transform:translateX(100%);transition:transform .28s cubic-bezier(.2,.9,.2,1);display:flex;flex-direction:column;justify-content:center}
.nav.open{transform:translateX(0)}
@media(min-width:900px){
  .nav{position:static;transform:none;flex-direction:row;background:transparent;padding:0;align-items:center}
  .nav-list{display:flex;gap:1.2rem}
  .nav-cta{margin-left:1.2rem}
  .nav-close{display:none}
}

.nav-list{list-style:none;padding:0;margin:0 0 1.2rem 0;display:flex;flex-direction:column;gap:1rem}
.nav-list a{color:var(--muted);text-decoration:none;padding:.4rem .2rem;border-radius:6px}
.nav-list a:hover{color:var(--accent2)}
.header-actions{display:flex;align-items:center;gap:0.6rem}
.hamburger{background:transparent;border:1px solid rgba(255,255,255,0.03);padding:.45rem;border-radius:8px;display:inline-flex;flex-direction:column;gap:4px}
.hamburger-line{display:block;height:2px;width:18px;background:linear-gradient(90deg,var(--accent1),var(--accent2));border-radius:2px}

.btn{display:inline-block;padding:.6rem .9rem;border-radius:10px;text-decoration:none;font-weight:600}
.btn-primary{background:linear-gradient(90deg,var(--accent1),var(--accent2));color:#061124;box-shadow:0 6px 18px rgba(16,24,40,0.35)}
.btn-outline{border:1px solid rgba(255,255,255,0.06);color:var(--muted);background:transparent}

/* HERO */
.hero{padding:4rem 0}
.hero-grid{display:grid;grid-template-columns:1fr 360px;gap:2rem;align-items:center}
.hero-content h1{font-size:clamp(1.6rem,3.8vw,2.6rem);margin:0 0 .6rem}
.lead{color:var(--muted);margin:0 0 1.2rem}
.hero-cta{display:flex;gap:0.7rem;margin-bottom:1rem}
.quick-stats{display:flex;gap:1rem;margin-top:1rem;list-style:none;padding:0}
.quick-stats li{background:var(--glass);padding:.6rem .8rem;border-radius:10px;min-width:88px;text-align:center}
.hero-card{background:var(--card);padding:1.4rem;border-radius:14px;box-shadow:0 6px 30px rgba(4,6,12,0.6)}
.device-illustration{display:flex;justify-content:center;padding:1rem}
.device-screen{width:180px;height:120px;background:linear-gradient(180deg,#071425,#0e1b2e);border-radius:12px;padding:12px;box-shadow:inset 0 1px 0 rgba(255,255,255,0.02)}
.screen-line{height:10px;background:linear-gradient(90deg,#1b3146,#0ea5a3);border-radius:6px;margin-bottom:8px;opacity:.9}
.screen-line.short{width:45%}
.screen-line.medium{width:65%}

/* Sections */
.section{padding:3rem 0}
.bg-surface{background:linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.01))}
.muted{color:var(--muted)}
h2{margin:0 0 .5rem;font-size:1.25rem}

/* Steps */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1rem}
.step{background:var(--glass);padding:1rem;border-radius:12px}
.step-number{width:42px;height:42px;border-radius:10px;background:linear-gradient(90deg,var(--accent2),var(--accent1));display:flex;align-items:center;justify-content:center;font-weight:700;color:#061124;margin-bottom:.6rem}
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:1.6rem}
  .steps-grid{grid-template-columns:1fr}
  .nav{position:fixed}
  .desktop-cta{display:none}
}

/* Features */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1rem}
.feature{background:var(--glass);padding:1rem;border-radius:12px;min-height:140px}
.feature .icon{width:36px;height:36px;margin-bottom:.5rem;opacity:.95}
@media(max-width:900px){ .features-grid{grid-template-columns:1fr; } }

/* Security */
.security-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1rem}
@media(max-width:900px){ .security-grid{grid-template-columns:1fr} }

/* FAQ */
.faq-list details{background:rgba(255,255,255,0.02);padding:1rem;border-radius:10px;margin-bottom:.6rem}
.faq-list summary{cursor:pointer;font-weight:600;list-style:none;outline:none}
.faq-body{color:var(--muted);margin-top:.6rem}

/* Footer */
.site-footer{border-top:1px solid rgba(255,255,255,0.03);padding-top:2rem;margin-top:2rem}
.footer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:1rem;align-items:start}
.footer-brand p{max-width:38ch;color:var(--muted)}
.footer-links ul{list-style:none;padding:0;margin:0}
.footer-links a{color:var(--muted);text-decoration:none}
.footer-bottom{padding:1rem 0;text-align:center;color:var(--muted);border-top:1px solid rgba(255,255,255,0.02);margin-top:1rem}
@media(max-width:900px){
  .footer-grid{grid-template-columns:1fr;gap:1.2rem}
}

/* small utilities */
.text-muted{color:var(--muted)}
.center{display:flex;align-items:center;justify-content:center}