/* i4b — общая дизайн-система сайта (многостраничник). Тёмная тема, оранжевый акцент. */
:root{
  --bg-0:#0B0E13; --surface:#12161D; --elevated:#171D26; --inset:#1B2230;
  --border:#232B37; --border-strong:#2E3745;
  --text:#E6EAF0; --text-2:#98A2B3; --muted:#667085;
  --accent:#EC6A34; --accent-hover:#f2793f; --accent-12:rgba(236,106,52,.12);
  --on-accent:#1a1205;
  --success:#2ED191; --danger:#F26A5B;
  --r-8:8px; --r-12:12px; --r-16:16px;
  --maxw:1120px;
  --success-12:rgba(46,209,145,.12);
  --danger-12:rgba(242,106,91,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg-0); color:var(--text);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  font-size:16px; line-height:1.55; -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
.mono{font-family:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,monospace}
a{color:inherit; text-decoration:none}
img,svg{display:block}
h1,h2,h3{margin:0; font-weight:800; letter-spacing:-.02em; line-height:1.12}
p{margin:0}
.container{max-width:var(--maxw); margin-inline:auto; padding-inline:24px}
.section{padding-block:88px}
.section.tight{padding-block:60px}
.surface-band{background:var(--surface); border-block:1px solid var(--border)}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:'JetBrains Mono',monospace; font-size:12px; font-weight:600;
  letter-spacing:.08em; text-transform:uppercase; color:var(--accent);
  background:var(--accent-12); border:1px solid rgba(236,106,52,.28);
  padding:6px 12px; border-radius:999px; margin-bottom:20px;
}
.eyebrow svg{width:14px;height:14px}
.section-head{max-width:760px; margin-bottom:44px}
.section-head h2{font-size:clamp(26px,4vw,38px)}
.section-head p{color:var(--text-2); font-size:17px; margin-top:14px}

/* Logo */
.logo{font-family:'JetBrains Mono',monospace; font-weight:700; font-size:24px;
  letter-spacing:-.02em; color:var(--text); display:inline-flex; align-items:center}
.logo span{color:var(--accent)}

/* Buttons */
.btn{display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:'Inter',sans-serif; font-weight:600; font-size:15px;
  padding:11px 20px; border-radius:var(--r-8); border:1px solid transparent;
  cursor:pointer; transition:background .15s,border-color .15s,transform .05s,color .15s;
  min-height:44px; white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--accent); color:var(--on-accent)}
.btn-primary:hover{background:var(--accent-hover)}
.btn-secondary{background:transparent; color:var(--text); border-color:var(--border-strong)}
.btn-secondary:hover{border-color:var(--muted); background:var(--elevated)}
.btn-ghost{background:var(--inset); color:var(--text); border-color:var(--border)}
.btn-ghost:hover{border-color:var(--border-strong)}
.btn-lg{padding:14px 26px; font-size:16px; min-height:52px}
.btn-block{width:100%}

/* Header */
.hdr{position:sticky; top:0; z-index:50;
  background:rgba(11,14,19,.82); backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--border)}
.hdr-inner{display:flex; align-items:center; gap:24px; height:64px}
.nav{display:flex; align-items:center; gap:26px; margin-left:16px}
.nav a{font-size:15px; color:var(--text-2); transition:color .15s}
.nav a:hover,.nav a.active{color:var(--text)}
.hdr-cta{margin-left:auto; display:flex; align-items:center; gap:10px}
.burger{display:none; margin-left:auto; background:var(--inset); border:1px solid var(--border);
  color:var(--text); width:44px; height:44px; border-radius:var(--r-8); cursor:pointer;
  align-items:center; justify-content:center}
.burger svg{width:22px;height:22px}

/* Hero (главная) */
.hero{position:relative; overflow:hidden; padding-block:96px 76px}
.hero::before{content:""; position:absolute; inset:0; z-index:0; pointer-events:none;
  background:
    radial-gradient(680px 340px at 78% -8%, rgba(236,106,52,.14), transparent 60%),
    radial-gradient(560px 360px at 8% 110%, rgba(46,209,145,.06), transparent 60%)}
.hero .container{position:relative; z-index:1; max-width:920px}
.hero h1{font-size:clamp(34px,6vw,58px); line-height:1.06}
.hero .sub{color:var(--text-2); font-size:clamp(16px,2.2vw,19px); margin-top:22px; max-width:720px}
.hero-cta{display:flex; flex-wrap:wrap; gap:14px; margin-top:34px}
.trust{display:flex; flex-wrap:wrap; align-items:center; gap:10px 22px; margin-top:38px;
  color:var(--text-2); font-size:14px}
.trust .dot{width:5px;height:5px;border-radius:50%;background:var(--accent)}
.trust b{color:var(--text); font-weight:600}

/* Page-hero (внутренние страницы) */
.page-hero{position:relative; overflow:hidden; padding-block:64px 40px; border-bottom:1px solid var(--border)}
.page-hero::before{content:""; position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(620px 300px at 82% -20%, rgba(236,106,52,.12), transparent 60%)}
.page-hero .container{position:relative; z-index:1}
.page-hero h1{font-size:clamp(28px,4.5vw,44px)}
.page-hero p{color:var(--text-2); font-size:17px; margin-top:14px; max-width:720px}
.crumbs{display:flex; gap:8px; align-items:center; color:var(--muted); font-size:13px; margin-bottom:16px}
.crumbs a:hover{color:var(--text-2)}
.crumbs svg{width:13px;height:13px}

/* Metrics strip */
.metrics{border-block:1px solid var(--border); background:var(--surface)}
.metrics-grid{display:grid; grid-template-columns:repeat(4,1fr)}
.metric{padding:34px 24px; text-align:center; border-left:1px solid var(--border)}
.metric:first-child{border-left:none}
.metric .num{font-family:'JetBrains Mono',monospace; font-weight:700; font-size:34px; color:var(--text); letter-spacing:-.02em}
.metric .num em{color:var(--accent); font-style:normal}
.metric .lbl{color:var(--text-2); font-size:14px; margin-top:6px}

/* Cards / grids */
.grid{display:grid; gap:16px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--surface); border:1px solid var(--border); border-radius:var(--r-16);
  padding:24px; transition:border-color .15s, transform .15s, background .15s}
.card:hover{border-color:var(--border-strong); background:var(--elevated); transform:translateY(-2px)}
.card.flat:hover{transform:none}
.card-icon{width:44px;height:44px;border-radius:var(--r-12);
  background:var(--accent-12); border:1px solid rgba(236,106,52,.24);
  display:flex; align-items:center; justify-content:center; color:var(--accent); margin-bottom:16px}
.card-icon svg{width:22px;height:22px}
.card h3{font-size:17px; font-weight:700}
.card p{color:var(--text-2); font-size:14.5px; margin-top:8px}
.card .card-price{font-family:'JetBrains Mono',monospace; color:var(--accent); font-size:14px; font-weight:600; margin-top:12px}

/* Chips (спеки услуг) */
.chips{display:flex; flex-wrap:wrap; gap:8px; margin-top:14px}
.chip{display:inline-flex; align-items:center; gap:6px; font-size:12.5px; color:var(--text-2);
  background:var(--inset); border:1px solid var(--border); border-radius:999px; padding:5px 11px}
.chip svg{width:13px;height:13px;color:var(--accent)}
.chip.mono{font-family:'JetBrains Mono',monospace; font-size:12px}

/* Service row (страница услуг) */
.srv{display:grid; grid-template-columns:1fr 260px; gap:28px; align-items:center; background:var(--surface);
  border:1px solid var(--border); border-radius:var(--r-16); padding:28px; transition:border-color .15s, background .15s}
.srv:hover{border-color:var(--border-strong); background:var(--elevated)}
.srv .srv-head{display:flex; align-items:center; gap:14px; margin-bottom:12px}
.srv .srv-ic{flex:none; width:48px;height:48px;border-radius:var(--r-12); background:var(--accent-12);
  border:1px solid rgba(236,106,52,.24); display:flex;align-items:center;justify-content:center;color:var(--accent)}
.srv .srv-ic svg{width:24px;height:24px}
.srv h3{font-size:19px}
.srv p{color:var(--text-2); font-size:14.5px; margin-top:2px}
.srv .srv-side{border-left:1px solid var(--border); padding-left:28px; display:flex; flex-direction:column; gap:12px}
.srv .srv-price{font-family:'JetBrains Mono',monospace; font-weight:700; font-size:22px; letter-spacing:-.02em}
.srv .srv-price small{display:block; font-size:12px; color:var(--muted); font-weight:500; margin-top:2px}
@media (max-width:760px){
  .srv{grid-template-columns:1fr; gap:18px}
  .srv .srv-side{border-left:none; border-top:1px solid var(--border); padding-left:0; padding-top:18px}
}

/* Why-i4b */
.why-item{display:flex; gap:16px; align-items:flex-start; padding:22px; background:var(--surface);
  border:1px solid var(--border); border-radius:var(--r-16)}
.why-item .ic{flex:none; width:42px;height:42px;border-radius:var(--r-12);
  background:var(--inset); border:1px solid var(--border); display:flex;align-items:center;justify-content:center; color:var(--accent)}
.why-item .ic svg{width:20px;height:20px}
.why-item h3{font-size:16px}
.why-item p{color:var(--text-2); font-size:14px; margin-top:6px}

/* Feature rows (2-col) */
.frow{display:grid; grid-template-columns:1fr 1fr; gap:14px}
.fitem{display:flex; gap:12px; align-items:flex-start; background:var(--surface); border:1px solid var(--border);
  border-radius:var(--r-12); padding:16px}
.fitem .ic{flex:none; width:38px;height:38px;border-radius:var(--r-8); background:var(--inset);
  border:1px solid var(--border); display:flex;align-items:center;justify-content:center;color:var(--accent)}
.fitem .ic svg{width:20px;height:20px}
.fitem b{font-size:14.5px}
.fitem p{color:var(--text-2); font-size:13px; margin-top:3px}

/* Numbered blocks (резервирование) */
.numblock{background:var(--surface); border:1px solid var(--border); border-radius:var(--r-16); padding:24px}
.numblock .n{font-family:'JetBrains Mono',monospace; font-weight:700; font-size:15px; color:var(--on-accent);
  background:var(--accent); width:30px;height:30px;border-radius:8px; display:flex;align-items:center;justify-content:center; margin-bottom:14px}
.numblock h3{font-size:16px; margin-bottom:10px}
.numblock ul{list-style:none; padding:0; margin:0; display:grid; gap:8px}
.numblock li{display:flex; gap:9px; align-items:flex-start; color:var(--text-2); font-size:14px}
.numblock li svg{width:16px;height:16px;color:var(--accent);flex:none;margin-top:2px}

/* Tables (цены / SLA / ответственность) */
.tbl-card{background:var(--surface); border:1px solid var(--border); border-radius:var(--r-16); overflow:hidden; margin-bottom:20px}
.tbl-card .tbl-head{padding:18px 22px; border-bottom:1px solid var(--border); display:flex; align-items:center; justify-content:space-between; gap:12px}
.tbl-card .tbl-head h3{font-size:17px}
.tbl-card .tbl-head .pill{font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--accent);
  background:var(--accent-12); border:1px solid rgba(236,106,52,.24); padding:3px 9px; border-radius:999px}
.ptable{width:100%; border-collapse:collapse; font-size:14.5px}
.ptable th,.ptable td{text-align:left; padding:12px 22px; border-top:1px solid var(--border)}
.ptable thead th{color:var(--muted); font-size:12px; font-weight:600; text-transform:uppercase; letter-spacing:.05em; border-top:none}
.ptable td.price{font-family:'JetBrains Mono',monospace; color:var(--text); font-weight:600; white-space:nowrap; text-align:right}
.ptable td.num{font-family:'JetBrains Mono',monospace; text-align:right; white-space:nowrap}
.ptable tbody tr:hover{background:var(--elevated)}
.ptable .tag-prov{color:var(--accent)} .ptable .tag-cli{color:var(--text-2)}
/* Двухколоночные таблицы «параметр — значение»: обе колонки по левому краю, ширина ограничена (без разлёта лево/право) */
.tbl-card.two{max-width:600px}
.ptable.two th,.ptable.two td{text-align:left}
.ptable.two td:last-child,.ptable.two th:last-child{text-align:left; padding-left:8px}
.ptable.two td.price,.ptable.two td.num{text-align:left; color:var(--accent)}
.ptable.two td:first-child{width:52%}
.note{color:var(--muted); font-size:13px; margin-top:6px}
.note.accent{color:var(--accent); font-family:'JetBrains Mono',monospace}

/* Prose (правовое / о компании) */
.prose{max-width:820px; color:var(--text-2); font-size:15.5px; line-height:1.7}
.prose h2{color:var(--text); font-size:22px; margin:34px 0 12px}
.prose h3{color:var(--text); font-size:17px; margin:24px 0 8px}
.prose p{margin:0 0 12px}
.prose ul{margin:0 0 14px; padding-left:22px}
.prose li{margin:0 0 6px}
.prose a{color:var(--accent); text-decoration:underline; text-underline-offset:2px}
.prose .meta{color:var(--muted); font-size:13px; font-family:'JetBrains Mono',monospace; margin-bottom:24px}
.prose strong,.prose b{color:var(--text)}

/* Info card (реквизиты) — обе колонки по левому краю (метка сверху/слева, значение слева) */
.info-card{background:var(--surface); border:1px solid var(--border); border-radius:var(--r-16); padding:24px}
.info-card h3{font-size:15px; margin-bottom:14px}
.info-row{display:grid; grid-template-columns:1fr; gap:3px; padding:11px 0; border-top:1px solid var(--border); font-size:14px}
.info-row:first-of-type{border-top:none; padding-top:0}
.info-row .k{color:var(--muted); font-size:12px}
.info-row .v{color:var(--text); text-align:left; font-size:14px; word-break:break-word}
.info-row .v.mono{font-family:'JetBrains Mono',monospace; font-size:13px}

/* Pricing cards (выжимка) */
.price-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
.price-card{background:var(--surface); border:1px solid var(--border); border-radius:var(--r-16); padding:24px;
  display:flex; flex-direction:column; transition:border-color .15s}
.price-card:hover{border-color:var(--border-strong)}
.price-card.feat{border-color:rgba(236,106,52,.45); background:linear-gradient(180deg,var(--elevated),var(--surface))}
.price-card .pc-head{display:flex; align-items:center; justify-content:space-between; gap:12px}
.price-card h3{font-size:16px}
.price-card .pill{font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--accent);
  background:var(--accent-12); border:1px solid rgba(236,106,52,.24); padding:3px 8px; border-radius:999px}
.price-card .price{font-family:'JetBrains Mono',monospace; font-weight:700; font-size:30px; margin-top:16px; letter-spacing:-.02em}
.price-card .price small{font-size:14px; color:var(--muted); font-weight:500}
.price-card ul{list-style:none; padding:0; margin:16px 0 22px; display:grid; gap:9px}
.price-card li{display:flex; gap:9px; align-items:flex-start; color:var(--text-2); font-size:14px}
.price-card li .mono{color:var(--text)}
.price-card li svg{width:16px;height:16px;color:var(--success);flex:none;margin-top:2px}
.price-card .btn{margin-top:auto}

/* Docs / support */
.docs-grid{display:grid; grid-template-columns:1fr 1fr; gap:16px}
.docs-card{background:var(--surface); border:1px solid var(--border); border-radius:var(--r-16); padding:26px}
.docs-card h3{font-size:18px; display:flex; align-items:center; gap:10px}
.docs-card h3 svg{width:20px;height:20px;color:var(--accent)}
.docs-links{display:grid; gap:10px; margin-top:16px}
.docs-links a{display:flex; align-items:center; gap:12px; padding:12px 14px;
  background:var(--inset); border:1px solid var(--border); border-radius:var(--r-12); font-size:14.5px; color:var(--text);
  transition:border-color .15s, background .15s}
.docs-links a:hover{border-color:var(--accent); background:var(--elevated)}
.docs-links a svg{width:18px;height:18px;color:var(--accent); flex:none}

/* Final CTA + form */
.cta-wrap{background:linear-gradient(180deg,var(--elevated),var(--surface)); border:1px solid var(--border-strong);
  border-radius:var(--r-16); padding:clamp(28px,5vw,48px); position:relative; overflow:hidden}
.cta-wrap::before{content:""; position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(520px 260px at 90% -20%,rgba(236,106,52,.16),transparent 60%)}
.cta-grid{position:relative; z-index:1; display:grid; grid-template-columns:1fr 1.05fr; gap:44px; align-items:start}
.cta-grid .lead h2{font-size:clamp(24px,3.6vw,34px)}
.cta-grid .lead p{color:var(--text-2); margin-top:14px; font-size:16px}
.cta-grid .lead ul{list-style:none; padding:0; margin:22px 0 0; display:grid; gap:12px}
.cta-grid .lead li{display:flex; gap:10px; align-items:center; font-size:14.5px; color:var(--text-2)}
.cta-grid .lead li svg{width:18px;height:18px;color:var(--accent);flex:none}

form.lead-form{display:grid; gap:14px}
.field{display:grid; gap:6px}
.field label{font-size:13.5px; font-weight:600; color:var(--text)}
.field label .req{color:var(--accent)}
.field input,.field textarea{width:100%; background:var(--inset); border:1px solid var(--border); border-radius:var(--r-8);
  color:var(--text); font-family:inherit; font-size:16px; padding:12px 14px; min-height:48px;
  transition:border-color .15s, box-shadow .15s}
.field textarea{min-height:104px; resize:vertical; line-height:1.5}
.field input::placeholder,.field textarea::placeholder{color:var(--muted)}
.field input:focus,.field textarea:focus{outline:none; border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-12)}
.field input:user-invalid,.field textarea:user-invalid{border-color:var(--danger)}
.field-row{display:grid; grid-template-columns:1fr 1fr; gap:14px}
.hp{position:absolute!important; left:-9999px; top:auto; width:1px; height:1px; overflow:hidden; opacity:0}
.consents{display:grid; gap:10px; margin-top:2px}
.consent{display:flex; gap:11px; align-items:flex-start; font-size:13.5px; color:var(--text-2); line-height:1.45; cursor:pointer}
.consent input[type=checkbox]{flex:none; width:20px; height:20px; margin:1px 0 0; accent-color:var(--accent); cursor:pointer}
.consent a{color:var(--accent); text-decoration:underline; text-underline-offset:2px}
.consent .req{color:var(--accent)}
.form-status{display:none; align-items:flex-start; gap:10px; border-radius:var(--r-8); padding:12px 14px; font-size:14px; line-height:1.45}
.form-status svg{width:18px;height:18px;flex:none;margin-top:1px}
.form-status.show{display:flex}
.form-status.ok{background:var(--success-12); border:1px solid rgba(46,209,145,.4); color:var(--success)}
.form-status.err{background:var(--danger-12); border:1px solid rgba(242,106,91,.4); color:var(--danger)}
.form-hint-block{font-size:12.5px; color:var(--muted); display:flex; gap:8px; align-items:center}
.form-hint-block svg{width:15px;height:15px;color:var(--muted)}

/* Footer */
.footer{border-top:1px solid var(--border); background:var(--surface); padding-block:52px 34px}
.footer-top{display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:32px}
.footer .logo{font-size:22px; margin-bottom:14px}
.footer p{color:var(--text-2); font-size:14px; max-width:320px}
.footer .req-block{color:var(--muted); font-size:12.5px; margin-top:14px; line-height:1.6}
.footer h4{font-size:13px; text-transform:uppercase; letter-spacing:.06em; color:var(--muted); margin:0 0 14px; font-weight:600}
.footer ul{list-style:none; padding:0; margin:0; display:grid; gap:10px}
.footer ul a{color:var(--text-2); font-size:14px}
.footer ul a:hover{color:var(--text)}
.footer-bottom{display:flex; flex-wrap:wrap; gap:12px; justify-content:space-between; align-items:center;
  border-top:1px solid var(--border); margin-top:36px; padding-top:22px; color:var(--muted); font-size:13px}

/* Cookie banner */
.cookie{position:fixed; left:16px; right:16px; bottom:16px; z-index:80;
  max-width:var(--maxw); margin-inline:auto;
  background:var(--elevated); border:1px solid var(--border-strong); border-radius:var(--r-16);
  padding:16px 18px; display:flex; flex-wrap:wrap; gap:14px; align-items:center;
  box-shadow:0 12px 40px rgba(0,0,0,.45)}
.cookie.hidden{display:none}
.cookie p{color:var(--text-2); font-size:13.5px; flex:1 1 320px; line-height:1.5}
.cookie a{color:var(--accent); text-decoration:underline; text-underline-offset:2px}
.cookie .btn{flex:none}

/* Responsive */
@media (max-width:960px){
  .nav{display:none}
  .hdr-cta{display:none}
  .burger{display:flex}
  .hdr.open .nav{display:flex; position:absolute; top:64px; left:0; right:0; flex-direction:column; gap:0;
    background:var(--surface); border-bottom:1px solid var(--border); padding:8px 24px 16px; margin:0}
  .hdr.open .nav a{padding:12px 0; border-bottom:1px solid var(--border)}
  .hdr.open .hdr-cta{display:flex; flex-direction:column; align-items:stretch; position:absolute;
    top:calc(64px + var(--navh,0px)); left:0; right:0; background:var(--surface); padding:12px 24px 18px; gap:10px}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(3){border-left:none}
  .metric:nth-child(-n+2){border-bottom:1px solid var(--border)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .frow{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr}
  .docs-grid{grid-template-columns:1fr}
  .cta-grid{grid-template-columns:1fr; gap:32px}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
  .section{padding-block:56px}
  .hero{padding-block:60px 48px}
  .grid-4{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column; align-items:flex-start}
  .ptable th,.ptable td{padding:10px 14px}
  .info-row{flex-direction:column; gap:2px}
  .info-row .v{text-align:left}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important; scroll-behavior:auto!important}}