/* ==========================================================================
   AI Solutions · payment storefront v6
   Palette: ink #0B1220 · ink-2 #131D33 · paper #F3F5F9 · signal #1A5CFF · silver #9FB0D3 · verified #0E9F6E
   Type: Unbounded (display, sparingly) · Manrope (text) · JetBrains Mono (money, units)
   Signature: a guilloché rosette — the security print of a гербовый бланк — slowly turning in the hero.
   ========================================================================== */
:root{
  --ink:#0b1220; --ink-2:#131d33; --ink-3:#1c2a48; --paper:#f3f5f9; --card:#fff; --line:#dfe5ee; --line-2:#c9d3e2;
  --text:#121a2a; --muted:#5b6577; --signal:#1a5cff; --signal-ink:#0e3fc4; --signal-wash:#eaf0ff; --silver:#9fb0d3;
  --ok:#0e9f6e; --display:'Unbounded','Manrope',system-ui,sans-serif; --sans:'Manrope',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,Menlo,monospace; --r:16px; --wrap:1180px; --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body.sf{margin:0;background:var(--paper);color:var(--text);font:500 16px/1.55 var(--sans);-webkit-font-smoothing:antialiased}
.sf img{max-width:100%;height:auto}
.sf a{color:var(--signal)}
.sf-wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 28px}
@media (max-width:640px){ .sf-wrap{padding:0 18px} }
.sf :focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:6px}
.sf-mono{font-family:var(--mono);font-size:.86em;letter-spacing:-.01em}
[hidden]{display:none!important}

/* --- nav ---------------------------------------------------------------- */
.sf-nav{position:relative;z-index:3;background:var(--ink);color:#c9d3e6}
.sf-nav-in{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.sf-logo img{display:block;width:168px;height:auto}
.sf-nav-links{display:flex;align-items:center;gap:26px;font-size:14px;font-weight:600}
.sf-nav-links a{color:#c9d3e6;text-decoration:none;transition:color .2s}
.sf-nav-links a:hover{color:#fff}
.sf-nav-mail{padding:8px 14px;border:1px solid rgba(159,176,211,.35);border-radius:999px;font-family:var(--mono);font-size:12.5px}
@media (max-width:860px){ .sf-nav-links a:not(.sf-nav-mail){display:none} }
@media (max-width:480px){ .sf-nav-mail{display:none} }

/* --- hero --------------------------------------------------------------- */
.sf-hero{position:relative;overflow:hidden;background:
  radial-gradient(900px 480px at 82% 40%,rgba(26,92,255,.20),transparent 62%),
  linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 100%);color:#fff}
.sf-hero::after{content:'';position:absolute;inset:auto 0 0;height:1px;background:linear-gradient(90deg,transparent,rgba(159,176,211,.45),transparent)}
.sf-hero-in{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:40px;align-items:center;padding-top:72px;padding-bottom:88px}
.sf-hero--app .sf-hero-in{padding-top:40px;padding-bottom:56px}
.sf-eyebrow{margin:0 0 18px;font:600 12px/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--silver)}
.sf-h1{margin:0;font:600 clamp(36px,5.4vw,64px)/1.04 var(--display);letter-spacing:-.025em;color:#fff;text-wrap:balance}
.sf-h1 em{font-style:normal;background:linear-gradient(100deg,#8fb0ff 0%,#fff 55%);-webkit-background-clip:text;background-clip:text;color:transparent}
.sf-h1--app{font-size:clamp(28px,3.6vw,44px)}
.sf-lead{max-width:560px;margin:24px 0 0;font-size:18px;line-height:1.6;color:#b9c4da}
.sf-hero-cta{display:flex;flex-wrap:wrap;align-items:center;gap:18px 28px;margin-top:36px}
.sf-btn{display:inline-flex;align-items:center;gap:10px;height:54px;padding:0 26px;border-radius:14px;background:var(--signal);color:#fff!important;font:700 16px var(--sans);text-decoration:none;box-shadow:0 10px 30px -10px rgba(26,92,255,.8);transition:transform .2s var(--ease),background .2s}
.sf-btn::after{content:'↓';font-family:var(--mono)}
.sf-btn:hover{background:#2f6bff;transform:translateY(-1px)}
.sf-facts{display:flex;flex-wrap:wrap;gap:6px 18px;font:500 13px var(--mono);color:#8e9bb6}
.sf-facts span+span::before{content:'·';margin-right:18px;color:#4c5a78}
.sf-crumb{display:inline-block;margin-bottom:22px;font:600 13px var(--mono);color:var(--silver)!important;text-decoration:none}
.sf-crumb:hover{color:#fff!important}
.sf-app-id{display:flex;align-items:center;gap:18px}
.sf-app-id .sf-app-ico{width:76px;height:76px;flex:0 0 auto;background:#fff}
.sf-app-id .sf-eyebrow{margin-bottom:10px}

/* signature: guilloché rosette */
.sf-rosette{position:relative;justify-self:center;width:min(420px,100%);aspect-ratio:1}
.sf-rosette svg{width:100%;height:100%;overflow:visible}
.sf-rosette path{fill:none;stroke-linejoin:round;vector-effect:non-scaling-stroke}
.sf-rosette .ros-0{stroke:rgba(159,176,211,.55);stroke-width:.7}
.sf-rosette .ros-1{stroke:rgba(26,92,255,.75);stroke-width:.7}
.sf-rosette .ros-2{stroke:rgba(159,176,211,.30);stroke-width:.6}
.sf-rosette .ros-3{stroke:rgba(143,176,255,.55);stroke-width:.7}
.sf-rosette .ros-4{stroke:rgba(255,255,255,.35);stroke-width:.6}
.ros-spin{transform-origin:160px 160px;animation:ros-spin 140s linear infinite}
.sf-rosette.is-paused .ros-spin{animation-play-state:paused}
@keyframes ros-spin{to{transform:rotate(360deg)}}
.sf-seal{position:absolute;inset:0;margin:auto;width:44%;height:44%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;border-radius:50%;
  background:radial-gradient(circle,rgba(11,18,32,.95) 54%,rgba(11,18,32,0) 70%);text-align:center}
.sf-seal-k{font:500 9.5px/1.2 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--silver)}
.sf-seal-v{font:600 30px/1 var(--display);letter-spacing:-.02em;color:#fff}
.sf-hero--app .sf-rosette{width:min(300px,100%)}
@media (max-width:900px){
  .sf-hero-in{grid-template-columns:minmax(0,1fr);padding-top:48px;padding-bottom:56px}
  .sf-h1{overflow-wrap:anywhere;hyphens:auto}
  .sf-h1--app{font-size:clamp(22px,6.6vw,32px)}
  .sf-app-id{gap:14px}
  .sf-app-id .sf-app-ico{width:60px;height:60px}
  .sf-app-id>div{min-width:0}
  .sf-rosette{position:absolute;right:-120px;top:-60px;width:360px;opacity:.35;pointer-events:none}
  .sf-seal{display:none}
  .sf-hero-copy{position:relative;z-index:1}
}

/* --- main steps --------------------------------------------------------- */
.sf-main{padding:72px 0 40px}
.sf--app .sf-main{padding-top:48px}
.sf-step+.sf-step{margin-top:72px}
.sf-step-h{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:8px 24px;margin-bottom:26px}
.sf-h2{margin:0;font:600 clamp(24px,2.6vw,32px)/1.15 var(--display);letter-spacing:-.02em;color:var(--text)}
.sf-step-note{margin:0;max-width:520px;font-size:15px;color:var(--muted)}
.sf-link{font-weight:700;text-decoration:none}
.sf-link:hover{text-decoration:underline}
.sf-in{animation:sf-in .55s var(--ease) both}
@keyframes sf-in{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* apps */
.sf-apps{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.sf-app{grid-column:span 2;position:relative;display:flex;flex-direction:column;gap:10px;min-height:236px;padding:24px;text-align:left;background:var(--card);border:1px solid var(--line);border-radius:var(--r);color:inherit;font:inherit;cursor:pointer;
  transition:border-color .25s,box-shadow .25s var(--ease),transform .25s var(--ease)}
.sf-app:nth-child(4),.sf-app:nth-child(5){grid-column:span 3}
.sf-app:hover{border-color:var(--line-2);box-shadow:0 22px 44px -26px rgba(11,18,32,.35);transform:translateY(-2px)}
.sf-app.is-on{border-color:var(--signal);box-shadow:0 0 0 3px var(--signal-wash),0 22px 44px -26px rgba(26,92,255,.5)}
.sf-app-ico{display:grid;place-items:center;width:60px;height:60px;border-radius:16px;background:var(--paper);overflow:hidden}
.sf-app-ico img{width:78%;height:78%;object-fit:contain}
.sf-app-t{margin-top:6px;font:700 19px/1.25 var(--sans);letter-spacing:-.01em}
.sf-app-l{font-size:14.5px;line-height:1.5;color:var(--muted)}
.sf-app-f{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;margin-top:auto;padding-top:14px;border-top:1px dashed var(--line);font:600 14px var(--mono);color:var(--text)}
.sf-app-f small{font:500 12px var(--sans);color:var(--muted)}
.sf-chip{padding:3px 9px;border-radius:999px;background:#e7f7f0;color:#0b6e4d;font:700 11.5px var(--sans)}
@media (max-width:980px){ .sf-apps{grid-template-columns:repeat(2,1fr)} .sf-app,.sf-app:nth-child(4),.sf-app:nth-child(5){grid-column:span 1} .sf-app:nth-child(5){grid-column:span 2} }
@media (max-width:600px){ .sf-apps{grid-template-columns:1fr} .sf-app,.sf-app:nth-child(5){grid-column:span 1;min-height:0} }

/* kind switch */
.sf-kind{display:inline-flex;padding:4px;margin-bottom:20px;border-radius:12px;background:#e6ebf3}
.sf-kind button{height:40px;padding:0 18px;border:0;border-radius:9px;background:none;color:var(--muted);font:700 14px var(--sans);cursor:pointer;transition:background .2s,color .2s}
.sf-kind button[aria-selected="true"]{background:#fff;color:var(--text);box-shadow:0 1px 3px rgba(11,18,32,.12)}
.sf-kind-note{margin-bottom:18px}

/* packages: a price ladder — the per-unit price is the fact people compare */
.sf-packs{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:900px){ .sf-packs{grid-template-columns:repeat(2,1fr)} }
@media (max-width:620px){
  .sf-packs{gap:10px}
  .sf-pack{padding:14px 14px 12px;gap:2px}
  .sf-pack-count{margin-top:4px;font-size:24px}
  .sf-pack-count span{font-size:12.5px;margin-top:2px}
  .sf-pack-price{margin-top:8px}
  .sf-pack-price .price{font-size:17px}
  .sf-pack-price s{font-size:12px}
  .sf-pack-unit{font-size:11px}
  .sf-pack-cta{margin-top:10px;padding:8px 0;font-size:14px}
}
@media (max-width:340px){ .sf-packs{grid-template-columns:1fr} }
.sf-pack{position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:6px;padding:22px 22px 20px;text-align:left;background:var(--card);border:1px solid var(--line);border-radius:var(--r);color:inherit;font:inherit;cursor:pointer;
  transition:border-color .25s,box-shadow .25s var(--ease),transform .25s var(--ease)}
.sf-pack:hover{border-color:var(--line-2);box-shadow:0 18px 36px -24px rgba(11,18,32,.35);transform:translateY(-2px)}
.sf-pack.is-on{border-color:var(--signal);box-shadow:0 0 0 3px var(--signal-wash)}
.sf-pack-top{display:flex;width:100%;align-items:center;justify-content:space-between}
.sf-pack-name{font:600 12px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.sf-pack-off{padding:3px 8px;border-radius:6px;background:var(--ink);color:#fff;font:700 12px var(--mono)}
.sf-pack-count{margin-top:8px;font:600 34px/1.05 var(--display);letter-spacing:-.03em;color:var(--text)}
.sf-pack-count span{display:block;margin-top:4px;font:600 14px var(--sans);letter-spacing:0;color:var(--muted)}
.sf-pack-price{margin-top:14px;display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px}
.sf-pack-price s{font:500 14px var(--mono);color:#98a3b5}
.sf-pack-price .price{font:700 22px var(--mono);letter-spacing:-.02em;color:var(--text)}
.sf-pack-price small{font:500 13px var(--sans);color:var(--muted)}
.sf-pack-unit{font:500 12.5px var(--mono);color:var(--ok)}
.sf-pack-cta{align-self:stretch;margin-top:16px;padding:11px 0;border-radius:11px;background:var(--paper);color:var(--signal);font:700 15px var(--sans);text-align:center;transition:background .2s,color .2s}
.sf-pack:hover .sf-pack-cta,.sf-pack.is-on .sf-pack-cta{background:var(--signal);color:#fff}

/* --- how + faq ---------------------------------------------------------- */
.sf-how{padding:72px 0;background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sf-how-list{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin:32px 0 0;padding:0;list-style:none;counter-reset:how}
.sf-how-list li{counter-increment:how;position:relative;padding-top:56px}
.sf-how-list li::before{content:counter(how);position:absolute;top:0;left:0;display:grid;place-items:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--line-2);font:600 15px var(--display);color:var(--signal)}
.sf-how-list li:not(:last-child)::after{content:'';position:absolute;top:20px;left:52px;right:-16px;height:1px;background:repeating-linear-gradient(90deg,var(--line-2) 0 4px,transparent 4px 9px)}
.sf-how-list b{display:block;font:700 18px var(--sans);margin-bottom:6px}
.sf-how-list span{color:var(--muted);font-size:15px}
@media (max-width:760px){ .sf-how-list{grid-template-columns:1fr} .sf-how-list li::after{display:none} }

.sf-faq{padding:72px 0}
.sf-faq-in{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);gap:40px}
@media (max-width:860px){ .sf-faq-in{grid-template-columns:1fr;gap:20px} }
.sf-faq-list details{border-bottom:1px solid var(--line)}
.sf-faq-list summary{display:flex;justify-content:space-between;gap:16px;padding:20px 0;font:700 17px var(--sans);cursor:pointer;list-style:none}
.sf-faq-list summary::-webkit-details-marker{display:none}
.sf-faq-list summary::after{content:'+';font:500 22px/1 var(--mono);color:var(--signal);transition:transform .25s var(--ease)}
.sf-faq-list details[open] summary::after{transform:rotate(45deg)}
.sf-faq-list p{margin:-6px 0 20px;max-width:680px;color:var(--muted)}

/* --- footer ------------------------------------------------------------- */
.sf-foot{background:var(--ink);color:#a7b3ca;font-size:14px}
.sf-foot-in{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:28px;padding-top:48px;padding-bottom:32px}
@media (max-width:760px){ .sf-foot-in{grid-template-columns:1fr} }
.sf-foot p{margin:14px 0 0;line-height:1.75}
.sf-foot a{color:#dbe3f2;text-decoration:none}
.sf-foot a:hover{color:#fff;text-decoration:underline}
.sf-foot .sf-copy{margin:0;padding:20px 0 24px;border-top:1px solid rgba(159,176,211,.15);font:500 12px var(--mono);color:#6e7b96}

/* --- inside Bitrix24 (iframe): no chrome, tighter rhythm ----------------- */
.sf--iframe{background:var(--paper)}
.sf--iframe .sf-main{padding:20px 0 24px}
.sf--iframe .sf-wrap{padding:0 16px}
.sf--iframe .sf-step+.sf-step{margin-top:36px}
.sf--iframe .sf-step-h{margin-bottom:16px}
.sf--iframe .sf-h2{font-size:20px}

@media (prefers-reduced-motion:reduce){
  .sf *,.sf *::before,.sf *::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* touch: cards are buttons, react at once; hover lift only where a mouse exists */
.sf-app,.sf-pack,.sf-kind button{cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:rgba(26,92,255,.12)}
@media (hover:none){
  .sf-app:hover,.sf-pack:hover{transform:none;box-shadow:none;border-color:var(--line)}
  .sf-pack:hover .sf-pack-cta{background:var(--paper);color:var(--signal)}
  .sf-pack.is-on .sf-pack-cta{background:var(--signal);color:#fff}
  .sf-app.is-on,.sf-pack.is-on{border-color:var(--signal)}
  .sf-app:active,.sf-pack:active{transform:scale(.985)}
}