/* ChatHelm landing — styles */
:root{
  --ink:#0b1622;
  --ink-2:#16283a;
  --muted:#5b7085;
  --line:#e6ecf3;
  --bg:#ffffff;
  --bg-soft:#f5f8fc;
  --brand:#ff9f0a;
  --brand-2:#ffbe3d;
  --tg:#2f8fff;
  --tg-2:#1f6fe0;
  --ok:#12b76a;
  --danger:#f04438;
  --radius:18px;
  --shadow:0 18px 50px rgba(11,22,34,.10);
  --shadow-lg:0 30px 80px rgba(11,22,34,.18);
  --maxw:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);overflow-x:hidden;
  font-family:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}
section{padding:88px 0;position:relative}
.soft{background:var(--bg-soft)}
h1,h2,h3,h4{margin:0;line-height:1.15;letter-spacing:-.02em}
h1{font-size:clamp(34px,5.4vw,62px);font-weight:800}
h2{font-size:clamp(27px,3.6vw,42px);font-weight:800}
h3{font-size:20px;font-weight:800}
p{margin:0}
.overline{display:inline-block;font-size:13px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--tg);margin-bottom:12px}
.sub{color:var(--muted);font-size:clamp(16px,1.6vw,19px);max-width:640px;margin-top:14px}
.center{text-align:center}
.center .sub{margin-left:auto;margin-right:auto}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 24px;border-radius:14px;border:1px solid transparent;
  font-weight:800;font-size:16px;text-decoration:none;cursor:pointer;
  transition:transform .15s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#231400;box-shadow:0 12px 28px rgba(255,159,10,.35)}
.btn-primary:hover{box-shadow:0 18px 38px rgba(255,159,10,.45)}
.btn-tg{background:linear-gradient(135deg,var(--tg),var(--tg-2));color:#fff;box-shadow:0 12px 28px rgba(47,143,255,.32)}
.btn-ghost{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.22);backdrop-filter:blur(6px)}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-line{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:var(--shadow)}
.btn-lg{padding:17px 30px;font-size:17px}

/* nav */
.nav{position:sticky;top:0;z-index:60;transition:background .25s ease,box-shadow .25s ease,backdrop-filter .25s}
.nav-inner{display:flex;align-items:center;gap:26px;height:72px}
.nav .logo img{height:30px;width:auto}
.nav-links{display:flex;gap:24px;margin-left:auto;font-size:15px;font-weight:600;color:rgba(255,255,255,.78)}
.nav-links a{text-decoration:none}
.nav-links a:hover{color:#fff}
.nav-cta{display:flex;gap:10px}
.nav.scrolled{background:rgba(255,255,255,.86);backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line)}
.nav.scrolled .nav-links{color:var(--muted)}
.nav.scrolled .nav-links a:hover{color:var(--ink)}
.nav.scrolled .logo .logo-light{display:none}
.nav.scrolled .logo .logo-dark{display:block}
.nav .logo .logo-dark{display:none}
.nav.scrolled .btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.burger{display:none;margin-left:auto;background:none;border:0;color:#fff;font-size:26px;cursor:pointer}

/* hero */
.hero{
  background:radial-gradient(1100px 620px at 78% -8%,rgba(47,143,255,.35),transparent 60%),
             radial-gradient(900px 620px at 4% 108%,rgba(255,159,10,.24),transparent 58%),
             linear-gradient(165deg,#081320 0%,#0d2135 58%,#0a1a2b 100%);
  color:#fff;padding:0 0 96px;margin-top:-72px;overflow:hidden;
}
.hero .container{padding-top:112px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{color:#fff}
.hero h1 .accent{background:linear-gradient(120deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{color:#b9cbdb;font-size:clamp(16px,1.8vw,20px);margin-top:20px;max-width:560px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.pill{display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);font-size:13.5px;font-weight:700;color:#dceaf7}
.dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px rgba(18,183,106,.18)}
.trust{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:26px;color:#93aec6;font-size:14.5px}
.trust b{color:#fff}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:38px;padding-top:26px;border-top:1px solid rgba(255,255,255,.12)}
.hero-stats .v{font-size:28px;font-weight:800;color:#fff}
.hero-stats .k{font-size:13.5px;color:#8ea9c2}

/* telegram mock */
.phone{
  background:#0e1b28;border:1px solid rgba(255,255,255,.14);border-radius:26px;padding:14px;
  box-shadow:var(--shadow-lg);max-width:420px;margin-left:auto;position:relative;
}
.phone-top{display:flex;align-items:center;gap:10px;padding:4px 6px 12px;border-bottom:1px solid rgba(255,255,255,.09);margin-bottom:12px}
.avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--tg),#0a4fa8);display:grid;place-items:center;font-size:16px}
.phone-top .t{font-weight:800;font-size:14.5px;color:#fff}
.phone-top .s{font-size:12px;color:#7f9ab3}
.chat{display:flex;flex-direction:column;gap:9px;min-height:330px}
.msg{max-width:86%;padding:10px 13px;border-radius:14px;font-size:14px;line-height:1.5;background:#182c3e;color:#dfeaf4;align-self:flex-start;animation:pop .45s both}
.msg.me{align-self:flex-end;background:linear-gradient(135deg,#2f8fff,#1f6fe0);color:#fff}
.msg.bot{background:#11202f;border:1px solid rgba(255,159,10,.32);color:#ffe9c6;align-self:stretch;max-width:100%}
.msg .who{display:block;font-size:11.5px;font-weight:800;color:#7fb2ff;margin-bottom:3px}
.msg.bot .who{color:var(--brand)}
.msg small{color:#93aec6}
@keyframes pop{from{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1;transform:none}}
.tabs{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.tab{padding:9px 15px;border-radius:11px;border:1px solid var(--line);background:#fff;font-weight:700;font-size:14px;cursor:pointer;color:var(--muted);transition:.15s}
.tab[aria-selected="true"]{background:var(--ink);color:#fff;border-color:var(--ink)}
.tab:hover{transform:translateY(-1px)}

/* grids & cards */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .2s ease,box-shadow .25s ease,border-color .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d6e2ef}
.card .ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:21px;background:linear-gradient(135deg,#eaf3ff,#dbe9ff);margin-bottom:14px}
.card.warn .ico{background:linear-gradient(135deg,#ffeceb,#ffdedb)}
.card p{color:var(--muted);margin-top:8px;font-size:15.5px}
.card h3{font-size:18px}
.badge{display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:800;background:#eaf3ff;color:var(--tg-2)}

/* steps */
.steps{counter-reset:s}
.step{position:relative;padding-left:64px}
.step:before{
  counter-increment:s;content:counter(s);position:absolute;left:0;top:0;
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#231400;font-weight:800;font-size:19px;
}

/* calculator */
.calc{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:var(--shadow)}
.calc label{display:block;font-weight:700;font-size:15px;margin-bottom:8px}
.calc .row{margin-bottom:22px}
.calc output{float:right;color:var(--tg);font-weight:800}
input[type=range]{width:100%;accent-color:var(--tg)}
.calc-result{background:linear-gradient(160deg,#0d2135,#0a1a2b);color:#fff;border-radius:18px;padding:26px;display:flex;flex-direction:column;justify-content:center}
.calc-result .big{font-size:clamp(30px,4vw,44px);font-weight:800;color:var(--brand)}
.calc-result .k{color:#9fb8cf;font-size:14px}
.calc-result hr{border:0;border-top:1px solid rgba(255,255,255,.14);margin:18px 0}

/* pricing */
.price{background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;display:flex;flex-direction:column;position:relative}
.price.hot{border-color:var(--brand);box-shadow:0 26px 60px rgba(255,159,10,.22);transform:translateY(-6px)}
.price .tag{position:absolute;top:-13px;left:30px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#231400;font-size:12.5px;font-weight:800;padding:5px 13px;border-radius:999px}
.price .sum{font-size:40px;font-weight:800;margin:12px 0 2px}
.price .sum span{font-size:16px;color:var(--muted);font-weight:700}
.price ul{list-style:none;padding:0;margin:18px 0 26px;display:flex;flex-direction:column;gap:11px;color:var(--muted);font-size:15.5px}
.price li:before{content:"✓";color:var(--ok);font-weight:800;margin-right:9px}
.price .btn{margin-top:auto}

/* comparison table */
.tbl{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;font-size:15.5px}
.tbl th,.tbl td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line)}
.tbl thead th{background:var(--bg-soft);font-size:14px;color:var(--muted);font-weight:800}
.tbl th:first-child{width:38%}
.tbl tbody tr:last-child td,.tbl tbody tr:last-child th{border-bottom:0}
.tbl .yes{color:var(--ok);font-weight:800}
.tbl .no{color:#98a8b8}
.tbl .col-us{background:rgba(255,159,10,.07);font-weight:700}

/* faq */
details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-bottom:12px}
details[open]{box-shadow:var(--shadow)}
summary{cursor:pointer;font-weight:800;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";color:var(--tg);font-size:22px;line-height:1}
details[open] summary:after{content:"–"}
details p{color:var(--muted);margin-top:12px;font-size:15.5px}

/* form */
.form-wrap{background:linear-gradient(165deg,#0d2135,#081320);color:#fff}
.form-wrap h2{color:#fff}
.form-wrap .sub{color:#a9c1d6}
.form-card{background:#fff;color:var(--ink);border-radius:22px;padding:30px;max-width:560px;margin:32px auto 0;box-shadow:var(--shadow-lg)}
.field{margin-bottom:16px}
.field label{display:block;font-weight:700;font-size:14.5px;margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:12px;font:inherit;font-size:16px;background:#fbfdff;color:var(--ink);
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--tg);box-shadow:0 0 0 4px rgba(47,143,255,.14)}
.form-note{color:var(--muted);font-size:13.5px;text-align:center;margin-top:14px}
.hidden{position:absolute;left:-9999px}
.form-alert{display:none;margin-top:14px;padding:12px 14px;border-radius:12px;font-size:14.5px;font-weight:700}
.form-alert.err{display:block;background:#fff1f0;color:#b42318}

/* footer */
footer{background:#071120;color:#8ea9c2;padding:56px 0 34px;font-size:15px}
footer a{color:#c6d9ea;text-decoration:none}
footer a:hover{color:#fff}
.foot-grid{display:flex;justify-content:space-between;gap:28px;flex-wrap:wrap}
footer .logo img{height:26px;margin-bottom:10px}
.legal{margin-top:34px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);font-size:13.5px;color:#6e8aa4}

/* sticky mobile cta */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;gap:10px;padding:10px 14px;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-top:1px solid var(--line)}
.sticky-cta .btn{flex:1;padding:13px}

/* reveal */
.reveal{opacity:0;transform:translateY(22px)}
.reveal.in{opacity:1;transform:none;transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.3,1)}

@media (max-width:980px){
  .hero-grid,.calc{grid-template-columns:1fr}
  .g3,.g4{grid-template-columns:repeat(2,1fr)}
  .phone{margin:0 auto}
  .nav-links{display:none}
  .burger{display:block}
  .nav-cta .btn-tg{display:none}
}
@media (max-width:640px){
  section{padding:64px 0}
  .nav .logo img{height:25px}
  .nav-cta .btn{padding:10px 14px;font-size:14px;border-radius:12px}
  .nav-cta .btn-ghost{display:none}
  .hero .container{padding-top:96px}
  .hero-stats{grid-template-columns:1fr 1fr;gap:18px}
  .hero-stats .v{font-size:24px}
  .hero-cta .btn{width:100%}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .price.hot{transform:none}
  .sticky-cta{display:flex}
  body{padding-bottom:66px}
  .tbl{font-size:14px}
  .tbl th,.tbl td{padding:12px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

@media (max-width:980px){ .demo-grid{grid-template-columns:1fr!important} }