*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--rk-bg);color:var(--rk-text);
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale
}
:root{
  --rk-bg:#f6f8fb;
  --rk-panel:#ffffff;
  --rk-panel-2:#eef2f8;
  --rk-text:#0f1220;
  --rk-muted:#5a6275;
  --rk-border:rgba(15,18,32,.10);
  --rk-accent:#7b5cff;
  --rk-accent-2:#3be7ff;
  --rk-maxw:1200px;
  --rk-r:16px;
  --rk-ring:0 0 0 2px rgba(123,92,255,.25), 0 10px 30px rgba(0,0,0,.18)
}
@media (prefers-color-scheme: dark){
  :root{
    --rk-bg:#0b0e13;--rk-panel:#151924;--rk-panel-2:#111521;
    --rk-text:#e8ecf8;--rk-muted:#adbbd7;--rk-border:rgba(255,255,255,.10)
  }
}
.container{width:min(92vw,var(--rk-maxw));margin-inline:auto}
a{color:inherit;text-decoration:none}

#particles-js{position:fixed;inset:0;z-index:-1}

.site-header{padding:18px 0 0}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:rgba(255,255,255,.65);border:1px solid var(--rk-border);
  border-radius:52px;padding:10px 14px;
  box-shadow:0 6px 20px rgba(0,0,0,.08);
  position:sticky;top:8px;z-index:10;backdrop-filter:saturate(1.2) blur(12px)
}
@media (prefers-color-scheme: dark){
  .header-inner{background:rgba(21,25,36,.68);box-shadow:0 6px 20px rgba(0,0,0,.28)}
}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{height:32px;border-radius:8px}
.brand-text h1{margin:0;font-size:14px;letter-spacing:.12em;font-weight:800}
.brand-text p{margin:0;font-size:11px;opacity:.8;letter-spacing:.18em;font-weight:600}
.site-nav{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.nav-link{
  padding:6px 10px;border-radius:999px;border:1px solid transparent;
  text-transform:uppercase;font-weight:800;font-size:12px;opacity:.9
}
.nav-link:hover{background:rgba(123,92,255,.10)}
.nav-link.is-active{background:rgba(123,92,255,.18);box-shadow:var(--rk-ring)}
.lang-switch{display:flex;gap:6px;margin-left:6px}
.lang-btn{
  border:1px solid var(--rk-border);background:var(--rk-panel-2);
  border-radius:999px;padding:6px 10px;font-weight:700;cursor:pointer
}
.lang-btn[aria-pressed="true"]{background:rgba(123,92,255,.18);box-shadow:var(--rk-ring)}

.hero{
  display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:center;
  padding:28px 0
}
@media (max-width:900px){ .hero{grid-template-columns:1fr} }
.hero__text h2{margin:0 0 8px;font-size:clamp(26px,4.5vw,40px);font-weight:800;letter-spacing:.02em}
.hero__text .sub{margin:0 0 14px;color:var(--rk-muted);font-weight:600}
.cta-row{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 8px}
.btn{
  border-radius:14px;border:1px solid var(--rk-border);
  background:var(--rk-panel);color:var(--rk-text);
  padding:12px 14px;font-weight:800;letter-spacing:.02em
}
.btn-primary{background:linear-gradient(135deg,var(--rk-accent),var(--rk-accent-2));border-color:transparent;color:#fff}
.btn-secondary{background:var(--rk-panel-2)}
.btn:focus{outline:none;box-shadow:var(--rk-ring)}
.note{margin:8px 0 0;color:var(--rk-muted);font-size:.95rem}
.hero__widget iframe{
  width:100%;height:420px;border:1px solid var(--rk-border);
  border-radius:var(--rk-r);background:var(--rk-panel);box-shadow:0 14px 38px rgba(0,0,0,.12)
}
@media (max-width:900px){ .hero__widget iframe{height:320px} }

.features{padding:8px 0 6px}
.cards{
  display:grid;gap:12px;grid-template-columns:repeat(auto-fit, minmax(220px, 1fr))
}
.card{
  background:var(--rk-panel);border:1px solid var(--rk-border);border-radius:14px;
  padding:14px;box-shadow:0 10px 24px rgba(0,0,0,.08)
}
.card h3{margin:0 0 6px;font-size:1.05rem}
.card p{margin:0;color:var(--rk-muted)}

.faq{padding:18px 0 30px}
.faq__grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.faq__item{
  background:var(--rk-panel);border:1px solid var(--rk-border);border-radius:12px;
  padding:14px;box-shadow:0 10px 24px rgba(0,0,0,.08)
}
.faq__item h4{margin:0 0 6px}
.faq__item p{margin:0;color:var(--rk-muted)}

.site-footer{padding:20px 0 40px;color:var(--rk-muted)}
.footer-inner{
  display:flex;justify-content:space-between;align-items:center;
  border-top:1px dashed var(--rk-border);padding-top:10px
}
.footer-link{font-weight:800}