:root{
  --bg:#12161C; --panel:#1C232D; --panel2:#222B37; --line:#2C3644;
  --text:#F2F5F8; --muted:#9AA6B5; --accent:#A6E22E; --accent-dim:#4E7A1B;
  --radius:14px; --wrap:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:16px/1.6 Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Ubuntu,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.2;margin:0 0 12px}
h1{font-size:clamp(28px,4.4vw,50px);letter-spacing:-.02em}
h2{font-size:clamp(22px,2.6vw,34px);letter-spacing:-.01em}
h3{font-size:19px}
p{margin:0 0 12px}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
.sub{color:var(--muted);max-width:760px}
.list{margin:0;padding:0;list-style:none}
.list li{position:relative;padding-left:26px;margin-bottom:8px;color:var(--muted)}
.list li:before{content:"";position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:3px;background:var(--accent-dim)}
.list--big li{font-size:16.5px;margin-bottom:12px}
.list--big li b{color:var(--text)}
.list--no li:before{background:#5A6675}
.list a{color:var(--accent)}

/* header */
.top{position:sticky;top:0;z-index:20;background:rgba(18,22,28,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top__in{display:flex;align-items:center;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.08em;font-size:15px}
.logo__dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(166,226,46,.15)}
.logo__sub{color:var(--muted);font-weight:500;letter-spacing:.02em;font-size:11px;text-transform:uppercase}
.nav{display:flex;gap:20px;margin-left:auto;font-size:15px;color:var(--muted)}
.nav a:hover{color:var(--text)}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--accent);color:#0F1408;font-weight:650;font-size:15px;
  padding:13px 22px;border-radius:12px;border:0;cursor:pointer;transition:.18s transform,.18s filter;
}
.btn:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn--sm{padding:10px 16px;font-size:14px}
.btn--ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent)}

/* hero */
.hero{padding:72px 0 40px;background:
  radial-gradient(900px 420px at 12% -10%,rgba(166,226,46,.10),transparent 60%),
  radial-gradient(700px 380px at 90% 0%,rgba(59,130,246,.10),transparent 60%)}
.badge{display:inline-block;border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:7px 14px;font-size:13px;margin-bottom:18px}
.lead{color:var(--muted);font-size:18px;max-width:820px}
.hero__cta{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0 34px}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:0;padding:0;list-style:none}
.facts li{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.facts b{display:block;font-size:20px;color:var(--accent)}
.facts span{color:var(--muted);font-size:13.5px}

/* sections */
.section{padding:64px 0}
.section--alt{background:#0E1218;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.grid{display:grid;gap:18px}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card--accent{border-color:rgba(166,226,46,.45);background:linear-gradient(180deg,rgba(166,226,46,.06),rgba(28,35,45,1))}
.card p{color:var(--muted)}
.price{margin:14px 0 0;font-weight:700;color:var(--text);font-size:20px}
.price span{display:block;color:var(--muted);font-weight:400;font-size:13.5px}
.tariff{font-size:30px;font-weight:800;color:var(--accent);margin:6px 0 14px}
.tariff span{display:block;font-size:13.5px;font-weight:400;color:var(--muted)}

/* demo */
.demo{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.demo__media{aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;color:#98A5B5;
  background:repeating-linear-gradient(45deg,#161C24,#161C24 12px,#1A2129 12px,#1A2129 24px);font-size:13px;letter-spacing:.04em}
.demo h3,.demo p{margin:16px 20px}
.demo p{margin-bottom:20px;color:var(--muted)}

/* calc */
.calc{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
.calc__fields,.calc__out{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.calc__fields label{display:block;color:var(--muted);font-size:14px;margin-bottom:14px}
.calc__fields input,.calc__fields select{
  width:100%;margin-top:6px;background:#0F141B;border:1px solid var(--line);border-radius:10px;
  color:var(--text);padding:11px 12px;font:inherit
}
.calc__row{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);color:var(--muted)}
.calc__row b{color:var(--text);font-size:18px}
.calc__note{color:var(--muted);font-size:13.5px;margin:14px 0 0}

/* steps */
.steps{counter-reset:s;margin:0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.steps li{counter-increment:s;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.steps li:before{content:counter(s);display:inline-flex;width:30px;height:30px;align-items:center;justify-content:center;
  border-radius:9px;background:rgba(166,226,46,.14);color:var(--accent);font-weight:700;margin-bottom:10px}
.steps b{display:block;margin-bottom:6px}
.steps span{color:var(--muted);font-size:14.5px}

/* subscribe */
.subscribe{margin-top:18px;display:flex;align-items:center;gap:24px;justify-content:space-between;
  background:var(--panel2);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.subscribe h3{margin:0 0 6px}
.subscribe p{margin:0;color:var(--muted);max-width:720px}

/* faq */
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:600}
.faq p{color:var(--muted);margin:10px 0 0}

/* lead */
.lead{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.form{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:grid;gap:14px}
.form label{display:block;color:var(--muted);font-size:14px}
.form input,.form textarea{width:100%;margin-top:6px;background:#0F141B;border:1px solid var(--line);border-radius:10px;
  color:var(--text);padding:12px;font:inherit;resize:vertical}
.form input:focus,.form textarea:focus{outline:0;border-color:var(--accent)}
.form input::placeholder,.form textarea::placeholder,
.calc__fields input::placeholder{color:#8B99AB;opacity:1}
.check{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:var(--muted)}
.check input{width:auto;margin:2px 0 0}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.form__status{min-height:22px;margin:0;font-size:14px}
.form__status.ok{color:var(--accent)}
.form__status.err{color:#FF8A80}

/* footer */
.foot{border-top:1px solid var(--line);padding:36px 0 22px;background:#0E1218}
.foot__in{display:flex;gap:24px;justify-content:space-between;flex-wrap:wrap}
.foot__links{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:14.5px}
.foot__links a:hover{color:var(--text)}
.foot__bottom{margin-top:22px;color:#9AA6B5;font-size:13.5px}

@media (max-width:1000px){
  .grid--3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .facts{grid-template-columns:repeat(2,1fr)}
  .calc,.lead,.grid--2{grid-template-columns:1fr}
}
@media (max-width:680px){
  .nav{display:none}
  .grid--3{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr}
  .subscribe{flex-direction:column;align-items:flex-start}
  .section{padding:48px 0}
}