:root{
  --bg:#0b0f17;
  --card:#111827;
  --text:#e5e7eb;
  --muted:#9ca3af;
  --accent:#60a5fa;
  --border:rgba(255,255,255,.08);
  --shadow: 0 10px 30px rgba(0,0,0,.25);
}

*{box-sizing:border-box}
body{margin:0;font-family:system-ui,Segoe UI,Roboto,Arial,sans-serif;background:linear-gradient(180deg,#070a10, #0b0f17);color:var(--text)}
a{color:inherit;text-decoration:none}
.container{width:min(1100px,92%);margin:0 auto}

.site-header{
  position:sticky;top:0;z-index:10;
  background:rgba(11,15,23,.75);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--border);
}
.header-row{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:16px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  background:rgba(96,165,250,.15);
  border:1px solid rgba(96,165,250,.25);
  color:var(--accent);font-weight:700;
}
.brand-text{font-weight:650;letter-spacing:.2px}

.nav{display:flex;align-items:center;gap:14px}
.nav-link{padding:10px 10px;border-radius:10px;color:var(--muted)}
.nav-link:hover{background:rgba(255,255,255,.04);color:var(--text)}
.nav-link.is-active{background:rgba(96,165,250,.12);color:var(--text);border:1px solid rgba(96,165,250,.25)}
.lang-switch{
  margin-left:6px;padding:9px 10px;border-radius:10px;
  border:1px solid var(--border);color:var(--text);
}
.lang-switch:hover{border-color:rgba(96,165,250,.35)}

.burger{display:none;background:transparent;border:1px solid var(--border);color:var(--text);
  padding:8px 10px;border-radius:10px;cursor:pointer}

.site-main{padding:28px 0 40px}
.hero{
  border:1px solid var(--border);
  background: radial-gradient(1200px 400px at 10% 0%, rgba(96,165,250,.18), transparent 55%),
              radial-gradient(900px 500px at 90% 0%, rgba(167,139,250,.14), transparent 55%),
              rgba(17,24,39,.55);
  border-radius:18px;padding:22px;box-shadow:var(--shadow)
}
.hero h1{margin:0 0 10px;font-size:28px}
.hero p{margin:0;color:var(--muted);line-height:1.6}

.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:18px}
.card{
  border:1px solid var(--border);
  background:rgba(17,24,39,.55);
  border-radius:16px;padding:16px;min-height:110px;
  box-shadow: 0 10px 25px rgba(0,0,0,.18);
  transition: transform .15s ease, border-color .15s ease;
}
.card:hover{transform: translateY(-2px);border-color:rgba(96,165,250,.28)}
.card-title{font-weight:650;margin:0 0 8px}
.card-desc{margin:0;color:var(--muted);font-size:14px;line-height:1.5}

.section{margin-top:18px}
.section h2{margin:0 0 10px;font-size:18px}
.two-col{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;margin-top:14px}

.form{border:1px solid var(--border);background:rgba(17,24,39,.55);border-radius:16px;padding:16px}
.input{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}
.input label{color:var(--muted);font-size:13px}
.input input,.input textarea{
  padding:11px 12px;border-radius:12px;border:1px solid var(--border);
  background:rgba(0,0,0,.2);color:var(--text);outline:none
}
.input input:focus,.input textarea:focus{border-color:rgba(96,165,250,.35)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:11px 14px;border-radius:12px;
  border:1px solid rgba(96,165,250,.35);
  background:rgba(96,165,250,.15);color:var(--text);
  cursor:pointer;font-weight:600
}
.btn:hover{background:rgba(96,165,250,.22)}
.note{color:var(--muted);font-size:13px;line-height:1.5}

.site-footer{border-top:1px solid var(--border);padding:16px 0;color:var(--muted)}
.footer-row{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
.small{font-size:13px}

@media (max-width: 980px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .two-col{grid-template-columns:1fr}
  .burger{display:inline-flex}
  .nav{display:none;position:absolute;right:4%;top:64px;flex-direction:column;align-items:stretch;
    background:rgba(11,15,23,.95);border:1px solid var(--border);border-radius:16px;padding:10px;min-width:220px}
  .nav.is-open{display:flex}
}