:root{
  --bg:#0a0e1a; --bg-2:#111827; --bg-3:#161f36; --text:#e7ecf6; --muted:#94a3b8;
  --border:#243049; --accent:#5b7cfa; --accent-2:#8b5cf6; --danger:#f87171; --ok:#34d399;
  --radius:14px; --maxw:1140px; --shadow:0 10px 30px rgba(0,0,0,.35);
}
[data-theme="light"]{
  --bg:#f6f8fc; --bg-2:#ffffff; --bg-3:#eef3fb; --text:#0f172a; --muted:#586a86;
  --border:#e3e9f2; --shadow:0 10px 30px rgba(16,32,64,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em}
p{margin:0 0 1em}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.small{font-size:.86rem}
.center{text-align:center}
.badge{display:inline-block;font-size:.78rem;padding:4px 10px;border:1px solid var(--border);
  border-radius:999px;color:var(--muted);background:var(--bg-3)}
.grad{background:linear-gradient(90deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent}

/* header */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(10px);
  background:color-mix(in srgb,var(--bg) 82%,transparent);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem}
.brand-mark{width:32px;height:32px}
.brand-accent{color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-links a{color:var(--muted);font-size:.95rem;transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-toggle{display:none;background:none;border:1px solid var(--border);color:var(--text);
  font-size:1.3rem;border-radius:10px;width:42px;height:42px;cursor:pointer}
.theme-toggle{background:var(--bg-3);border:1px solid var(--border);color:var(--text);
  width:38px;height:38px;border-radius:10px;cursor:pointer;font-size:1rem}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;
  border-radius:10px;font-weight:600;font-size:.95rem;cursor:pointer;border:1px solid transparent;
  transition:transform .15s,box-shadow .15s,background .2s;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#fff;
  box-shadow:0 6px 18px rgba(91,124,250,.35)}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--text)}
.btn-ghost:hover{background:var(--bg-3)}
.btn-block{width:100%}
.btn-lg{padding:14px 26px;font-size:1.02rem}

/* hero */
.hero{padding:84px 0 64px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-40% 40% auto auto;width:640px;height:640px;
  background:radial-gradient(circle,rgba(139,92,246,.18),transparent 60%);pointer-events:none}
.hero h1{font-size:clamp(2rem,5vw,3.4rem);margin-bottom:.3em}
.hero .lead{font-size:1.18rem;color:var(--muted);max-width:640px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.trust{display:flex;gap:28px;flex-wrap:wrap;align-items:center;margin-top:44px;opacity:.75}
.trust span{color:var(--muted);font-weight:600;letter-spacing:.04em}

/* sections */
.section{padding:64px 0;border-top:1px solid var(--border)}
.section-head{max-width:660px;margin-bottom:40px}
.section-head h2{font-size:clamp(1.6rem,3.5vw,2.3rem)}
.eyebrow{color:var(--accent);font-weight:700;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase}

/* grid + cards */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px;transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-3px);border-color:var(--accent)}
.card .ico{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--bg-3);font-size:1.4rem;margin-bottom:14px}
.card h3{font-size:1.15rem}
.card p{margin:0;color:var(--muted);font-size:.95rem}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.stat b{display:block;font-size:2rem;background:linear-gradient(90deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent}

/* steps */
.steps{counter-reset:s}
.step{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--border)}
.step:last-child{border-bottom:0}
.step .n{counter-increment:s;flex:0 0 40px;height:40px;border-radius:10px;background:var(--bg-3);
  border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-weight:700}
.step .n::before{content:counter(s)}

/* pricing */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.price{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius);padding:30px;display:flex;flex-direction:column}
.price.popular{border-color:var(--accent);box-shadow:var(--shadow);position:relative}
.price.popular::after{content:"Популярный";position:absolute;top:-12px;right:20px;background:var(--accent);
  color:#fff;font-size:.75rem;padding:4px 12px;border-radius:999px}
.price .amount{font-size:2.3rem;font-weight:700;margin:10px 0}
.price .amount small{font-size:.9rem;color:var(--muted);font-weight:400}
.price ul{list-style:none;padding:0;margin:18px 0 24px;flex:1}
.price li{padding:7px 0 7px 26px;position:relative;color:var(--muted)}
.price li::before{content:"\2713";position:absolute;left:0;color:var(--ok);font-weight:700}

/* cta band */
.cta-band{background:linear-gradient(120deg,var(--bg-3),var(--bg-2));border:1px solid var(--border);
  border-radius:20px;padding:48px;text-align:center}

/* forms */
.auth-wrap{max-width:440px;margin:56px auto;padding:0 20px}
.auth-card{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius);padding:34px}
.field{margin-bottom:16px}
.field label{display:block;font-size:.88rem;margin-bottom:6px;color:var(--muted)}
.field input{width:100%;padding:12px 14px;background:var(--bg-3);border:1px solid var(--border);
  border-radius:10px;color:var(--text);font-size:.98rem}
.field input:focus{outline:none;border-color:var(--accent)}
.field input.has-error{border-color:var(--danger)}
.alert{display:none;margin-bottom:16px;padding:12px 14px;border-radius:10px;font-size:.9rem;
  background:color-mix(in srgb,var(--danger) 14%,transparent);border:1px solid var(--danger);color:var(--text)}
.alert.show{display:block}
.alert.ok{background:color-mix(in srgb,var(--ok) 14%,transparent);border-color:var(--ok)}
.form-foot{margin-top:18px;text-align:center;font-size:.9rem;color:var(--muted)}
.form-foot a{color:var(--accent)}

/* faq */
details{background:var(--bg-2);border:1px solid var(--border);border-radius:12px;padding:6px 20px;margin-bottom:12px}
summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";float:right;color:var(--accent);font-size:1.3rem;line-height:1}
details[open] summary::after{content:"\2212"}
details p{padding-bottom:14px;margin:0;color:var(--muted)}

/* requisites table */
.reqs{width:100%;border-collapse:collapse;background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.reqs td{padding:13px 18px;border-bottom:1px solid var(--border);vertical-align:top}
.reqs tr:last-child td{border-bottom:0}
.reqs td:first-child{color:var(--muted);width:38%}

/* footer */
.site-footer{border-top:1px solid var(--border);background:var(--bg-2);margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.6fr;gap:30px;padding:52px 0 30px}
.footer-col h4{font-size:.95rem;margin-bottom:14px}
.footer-col a{display:block;color:var(--muted);font-size:.9rem;padding:4px 0}
.footer-col a:hover{color:var(--text)}
.footer-bottom{padding:18px 0;border-top:1px solid var(--border)}

/* modal */
.modal-overlay{display:none;position:fixed;inset:0;z-index:100;background:rgba(4,7,15,.6);
  backdrop-filter:blur(4px);align-items:center;justify-content:center;padding:20px}
.modal-overlay.open{display:flex}
.modal{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius);
  padding:32px;max-width:420px;width:100%;position:relative;box-shadow:var(--shadow)}
.modal-close{position:absolute;top:14px;right:16px;background:none;border:0;color:var(--muted);font-size:1.5rem;cursor:pointer}
.modal-actions{display:flex;gap:12px;margin-top:20px}

/* responsive */
@media(max-width:860px){
  .grid-3,.grid-4,.price-grid,.stats{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;top:66px;left:0;right:0;flex-direction:column;
    align-items:flex-start;gap:6px;padding:16px 20px;background:var(--bg-2);border-bottom:1px solid var(--border)}
  .nav-links.open{display:flex}
  .grid-2,.grid-3,.grid-4,.price-grid,.stats,.footer-grid{grid-template-columns:1fr}
  .cta-band{padding:32px 22px}
}