/* Merches B2B Partners — сайт. Профиль A «Ink & Steel». */

/* ---------- Fonts (self-hosted, SIL OFL) ---------- */
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/inter-cyrillic-400-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/inter-latin-400-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/inter-latin-ext-400-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Inter';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/inter-cyrillic-500-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Inter';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/inter-latin-500-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Inter';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/inter-latin-ext-500-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/inter-cyrillic-600-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/inter-latin-600-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/inter-latin-ext-600-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/montserrat-cyrillic-600-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/montserrat-latin-600-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/montserrat-latin-ext-600-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/montserrat-cyrillic-700-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/montserrat-latin-700-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/montserrat-latin-ext-700-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}

/* ---------- Tokens ---------- */
:root{
  --ink:#16283B; --teal:#237A80; --mist:#86C3C4;
  --text:#2A323A; --slate:#5E6A74; --line:#D8DCDF; --paper:#F4F5F3; --white:#fff;
  --on-ink-2:rgba(255,255,255,.72); --on-ink-3:rgba(255,255,255,.56); --on-ink-line:rgba(255,255,255,.16);
  --f-head:'Montserrat',Arial,sans-serif; --f-text:'Inter',Arial,sans-serif;
  --wrap:1200px; --gut:24px; --header:72px;
}

/* ---------- Base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header) + 16px)}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--white);color:var(--text);font:400 17px/1.6 var(--f-text);text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3,h4{font-family:var(--f-head);color:var(--ink);margin:0;font-weight:700;line-height:1.12;text-wrap:balance}
p{margin:0}
a{color:inherit}
img,svg{display:block;max-width:100%}
ul{margin:0;padding:0;list-style:none}
.wrap{max-width:calc(var(--wrap) + var(--gut)*2);margin:0 auto;padding:0 var(--gut)}
.skip{position:absolute;left:-9999px;top:8px;background:var(--ink);color:#fff;padding:8px 12px;z-index:100}
.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px}
.num{font-variant-numeric:tabular-nums}

/* Label — Inter 600, uppercase, +14% */
.label{font:600 12px/1.3 var(--f-text);letter-spacing:.14em;text-transform:uppercase;color:var(--slate)}
.eyebrow{font:600 13px/1.3 var(--f-text);letter-spacing:.14em;text-transform:uppercase;color:var(--teal);margin-bottom:20px}
.dark .eyebrow{color:var(--mist)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;height:52px;padding:0 26px;border:1px solid transparent;border-radius:2px;font:600 15px/1 var(--f-text);text-decoration:none;cursor:pointer;transition:background .2s,color .2s,border-color .2s;white-space:nowrap}
.btn svg{width:16px;height:16px;flex:none}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:#1c666b}
.btn-ink{background:var(--ink);color:#fff}
.btn-ink:hover{background:#0f1d2b}
.btn-ghost{border-color:rgba(255,255,255,.4);color:#fff;background:transparent}
.btn-ghost:hover{border-color:#fff}
.btn-sm{height:40px;padding:0 18px;font-size:14px}

/* ---------- Header ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent;transition:border-color .2s}
.header.scrolled{border-bottom-color:var(--line)}
.header .wrap{display:flex;align-items:center;height:var(--header);gap:32px}
.brand{display:block;color:var(--ink);flex:none}
.logo-h{width:200px;height:auto}
.logo-sep{fill:#B9C0C6}
.nav{display:flex;gap:28px;margin-left:auto}
.nav a{font:500 15px/1 var(--f-text);color:var(--text);text-decoration:none;padding:8px 0;border-bottom:1px solid transparent}
.nav a:hover{border-bottom-color:var(--ink)}
.lang{display:flex;gap:2px;font:600 12px/1 var(--f-text);letter-spacing:.08em}
.lang a{padding:8px 6px;text-decoration:none;color:var(--slate)}
.lang a[aria-current]{color:var(--ink);box-shadow:inset 0 -2px 0 var(--teal)}
.lang a:hover{color:var(--ink)}
.burger{display:none;margin-left:auto;width:44px;height:44px;border:0;background:none;cursor:pointer;padding:10px;color:var(--ink)}
.burger span{display:block;height:2px;background:currentColor;margin:6px 0;transition:transform .2s,opacity .2s}
.menu-open .burger span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.menu-open .burger span:nth-child(2){opacity:0}
.menu-open .burger span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ---------- Sections ---------- */
.section{padding:120px 0}
.section.paper{background:var(--paper)}
.dark{background:var(--ink);color:#fff}
.dark h1,.dark h2,.dark h3{color:#fff}
.sec-head{max-width:760px;margin-bottom:64px}
.h2{font-size:clamp(32px,4.2vw,52px);letter-spacing:-.01em}
.lead{font-size:20px;line-height:1.6;color:var(--text);margin-top:24px;max-width:640px}
.dark .lead{color:var(--on-ink-2)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:120px 0 0}
.hero-mark{position:absolute;right:-220px;top:56px;width:640px;max-width:none;pointer-events:none}
@media (max-width:1280px){.hero-mark{right:-300px}}
.hero-inner{position:relative;max-width:760px}
.hero h1{font-size:clamp(46px,7.6vw,96px);letter-spacing:-.015em;line-height:1.04}
.hero .lead{font-size:clamp(18px,1.6vw,21px);max-width:600px;margin-top:32px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:44px}
.hero-facts{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:112px;padding:28px 0 56px;border-top:1px solid var(--on-ink-line)}
.hero-facts .label{color:var(--mist);margin-bottom:10px}
.hero-facts p{color:#fff;font-size:16px;line-height:1.5}

/* ---------- Platform / about ---------- */
.cols3{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.col{border-top:1px solid var(--line);padding-top:20px}
.col .label{margin-bottom:14px}
.col p{font-size:16px;line-height:1.65}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-top:88px;border-top:2px solid var(--ink)}
.stat{padding-top:24px}
.stat b{display:block;font:700 clamp(36px,4vw,48px)/1 var(--f-head);color:var(--ink);letter-spacing:-.015em;font-variant-numeric:tabular-nums}
.stat b.accent{color:var(--teal)}
.stat span{display:block;margin-top:12px;font-size:15px;line-height:1.5;color:var(--slate)}

/* ---------- Products ---------- */
.products{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.product{position:relative;display:flex;flex-direction:column;border-top:2px solid var(--ink);padding-top:24px}
.product + .product::before{content:'→';position:absolute;left:-30px;top:58px;font:400 22px/1 var(--f-text);color:var(--slate)}
.p-num{font:600 15px/1 var(--f-head);color:var(--teal);letter-spacing:.06em}
.product h3{font-size:clamp(26px,2.5vw,32px);margin-top:18px;letter-spacing:-.01em}
.p-sub{color:var(--slate);margin-top:8px;font-size:17px}
.p-rows{margin-top:28px;display:grid;gap:20px}
.p-rows .label{margin-bottom:6px;font-size:11px}
.p-rows p{font-size:16px;line-height:1.55}
.p-foot{margin-top:auto;padding-top:28px}
.p-foot div{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding-top:16px;font-weight:600;color:var(--ink);font-size:15px}
.p-foot span{color:var(--slate);font-weight:400}

/* ---------- Model ---------- */
.model{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.m-col{position:relative;border-top:2px solid var(--ink);padding-top:28px}
.m-col.result{border-top-color:var(--teal)}
.m-col + .m-col .op{position:absolute;left:-30px;top:30px;font:600 30px/1 var(--f-head);color:var(--slate)}
.m-col h3{font-size:clamp(28px,2.8vw,36px);letter-spacing:-.01em}
.m-col > p{color:var(--slate);margin-top:14px;font-size:17px;min-height:84px}
.m-col ul{margin-top:28px}
.m-col li{border-top:1px solid var(--line);padding:14px 0;font-size:16px;color:var(--text)}
.note{margin-top:48px;font-size:14px;color:var(--slate);max-width:760px}

/* ---------- Mark legend ---------- */
.legend{display:grid;grid-template-columns:5fr 7fr;gap:64px;align-items:center}
.legend-fig{width:100%}
.legend-fig text{font-family:var(--f-text)}
.legend-fig .t1{font:600 16px var(--f-head);fill:var(--ink)}
.legend-fig .t2{font:400 14px var(--f-text);fill:var(--slate)}
.legend-fig-m,.legend-list{display:none}
.legend-list li{display:grid;grid-template-columns:28px 1fr;gap:4px 12px;padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
.legend-list li:first-child{border-top:1px solid var(--line)}
.legend-list b{font:600 16px/1.3 var(--f-head);color:var(--ink);display:block}
.legend-list span{color:var(--slate)}
.legend-list i{font:600 13px/1.6 var(--f-head);font-style:normal;color:var(--teal)}
.legend-cols{margin-top:72px}

/* ---------- Steps ---------- */
.steps{border-top:2px solid var(--ink)}
.step{display:grid;grid-template-columns:96px 1fr 1.3fr 200px;gap:32px;padding:30px 0;border-bottom:1px solid var(--line);align-items:baseline}
.step .p-num{font-size:16px}
.step h3{font-size:22px;letter-spacing:-.005em}
.step p{font-size:16px;color:var(--text)}
.step .term{text-align:right;font-weight:600;color:var(--ink);font-size:15px}

/* ---------- Contact ---------- */
.contact{display:grid;grid-template-columns:5fr 6fr;gap:80px}
.contact .lead{font-size:19px}
.c-list{margin-top:48px;border-top:1px solid var(--on-ink-line)}
.c-list li{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:16px 0;border-bottom:1px solid var(--on-ink-line);font-size:16px}
.c-list .label{color:var(--mist);padding-top:4px}
.c-list a{color:#fff;text-decoration:none;border-bottom:1px solid var(--on-ink-line)}
.c-list a:hover{border-bottom-color:#fff}

.form{display:grid;grid-template-columns:1fr 1fr;gap:8px 32px;align-content:start}
.field{position:relative;grid-column:span 1}
.field.full{grid-column:1/-1}
.field label{display:block;font:600 11px/1.3 var(--f-text);letter-spacing:.14em;text-transform:uppercase;color:var(--mist);padding-top:18px}
.field input,.field select,.field textarea{width:100%;background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.3);border-radius:0;color:#fff;font:400 17px/1.4 var(--f-text);padding:10px 0 12px;transition:border-color .2s;-webkit-appearance:none;appearance:none}
.field textarea{resize:vertical;min-height:96px}
.field select{cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%2386C3C4' stroke-width='1.6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 2px center;padding-right:24px}
.field select option{color:var(--ink);background:#fff}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.38)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-bottom-color:var(--mist)}
.field.invalid input,.field.invalid textarea{border-bottom-color:#E59C8C}
.hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden}
.consent{grid-column:1/-1;display:flex;gap:12px;align-items:flex-start;margin-top:22px;font-size:14px;line-height:1.5;color:var(--on-ink-2);cursor:pointer}
.consent input{flex:none;width:18px;height:18px;margin:2px 0 0;accent-color:var(--teal)}
.form-foot{grid-column:1/-1;display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-top:28px}
.form-msg{font-size:15px;color:var(--on-ink-2)}
.form-msg.ok{color:var(--mist)}
.form-msg.err{color:#F2B8AA}
.form.sending .btn{opacity:.6;pointer-events:none}

/* ---------- Footer ---------- */
.footer{background:var(--ink);color:var(--on-ink-3);border-top:1px solid var(--on-ink-line);padding:56px 0 40px;font-size:14px;line-height:1.6}
.footer .grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:32px}
.footer .brand{color:#fff}
.footer .logo-sep{fill:rgba(255,255,255,.5)}
.footer .logo-h{width:170px}
.footer b{display:block;color:#fff;font-weight:600;margin-bottom:6px}
.footer a{color:var(--on-ink-2);text-decoration:none}
.footer a:hover{color:#fff}
.footer .bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:48px;padding-top:24px;border-top:1px solid var(--on-ink-line);font-size:13px}
.footer .slogan{margin-top:16px;color:var(--on-ink-2)}

/* ---------- Reveal ---------- */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .nav{gap:20px}
  .header .btn-sm{display:none}
  .step{grid-template-columns:72px 1fr 1.2fr}
  .step .term{grid-column:2/-1;text-align:left;color:var(--slate)}
}
@media (max-width:900px){
  :root{--header:64px}
  .section{padding:88px 0}
  .burger{display:block}
  .header .wrap{gap:12px}
  .nav,.header .lang{display:none}
  .menu-open .mobile-menu{display:flex}
  .logo-h{width:168px}
  .hero{padding-top:80px}
  .hero-mark{width:520px;right:-240px;top:24px}
  .hero-facts{grid-template-columns:1fr;gap:20px;margin-top:80px}
  .cols3,.products,.model{grid-template-columns:1fr;gap:48px}
  .product + .product::before,.m-col + .m-col .op{display:none}
  .m-col > p{min-height:0}
  .stats{grid-template-columns:repeat(2,1fr);gap:8px 24px;margin-top:64px}
  .stat{padding-bottom:16px}
  .legend{grid-template-columns:1fr;gap:40px}
  .legend-cols{margin-top:48px}
  .contact{grid-template-columns:1fr;gap:56px}
  .footer .grid{grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
  :root{--gut:16px}
  body{font-size:16px}
  .section{padding:72px 0}
  .sec-head{margin-bottom:44px}
  .lead{font-size:18px}
  .hero-cta .btn{flex:1 1 100%;justify-content:center}
  .hero h1{font-size:clamp(32px,9.4vw,46px)}
  .h2{font-size:clamp(28px,8vw,34px)}
  .step{grid-template-columns:1fr;gap:10px;padding:24px 0}
  .step .term{grid-column:auto}
  .form{grid-template-columns:1fr}
  .c-list li{grid-template-columns:1fr;gap:4px}
  .footer .grid{grid-template-columns:1fr}
  .hero-mark{display:none}
  .legend-fig{display:none}
  .legend-fig-m{display:block;width:100%;max-width:340px;margin:0 auto 28px}
  .legend-list{display:block}
  .form-foot .btn{width:100%;justify-content:center}
}

/* Mobile menu */
.mobile-menu{display:none;position:fixed;inset:var(--header) 0 0 0;background:#fff;z-index:49;flex-direction:column;padding:24px var(--gut) 40px;overflow:auto;border-top:1px solid var(--line)}
.mobile-menu a.m-link{font:600 26px/1.2 var(--f-head);color:var(--ink);text-decoration:none;padding:18px 0;border-bottom:1px solid var(--line)}
.mobile-menu .lang{margin-top:28px;font-size:14px}
.mobile-menu .btn{margin-top:28px;justify-content:center}
.menu-open{overflow:hidden}