/* Freeland content layer — visual system ported 1:1 from LIVE mf0.store
   Monochrome — white/grey on black, NO red anywhere in content (per Igor). Marker display font Leonov SP. */
/* Leonov SP is release-local. Sans and mono copy use system stacks so the
   public layer makes no third-party font requests. */
@font-face{font-family:"Leonov SP";src:url(/seo-assets/fonts/LeonovSP.otf) format("opentype");font-weight:400;font-style:normal;font-display:swap}

:root{
  --background:0 0% 4%; --foreground:0 0% 96%; --card:0 0% 10%; --card-2:0 0% 8%;
  --primary:0 0% 100%; --secondary:0 0% 14%; --muted:0 0% 16%; --muted-foreground:0 0% 54%;
  --border:0 0% 20%; --red:#ef4444;
  --font-sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;
  --font-marker:"Leonov SP",cursive;
  --radius:1.25rem; --maxw:72rem;
}
*{box-sizing:border-box}
html{background:#000;scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden;max-width:100%}
body{
  margin:0;background:hsl(var(--background));color:hsl(var(--foreground));
  font-family:var(--font-sans);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;height:auto}
a{color:hsl(var(--foreground));text-decoration:none}
.mono{font-family:var(--font-mono)}
::selection{background:hsl(var(--foreground));color:#000}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:hsl(var(--background)/.72);backdrop-filter:blur(14px);border-bottom:1px solid hsl(var(--border)/.6)}
.nav{max-width:72rem;margin:0 auto;height:66px;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:0 1.5rem}
.brand{display:inline-flex;align-items:center;gap:10px;color:hsl(var(--foreground))}
.brand:hover{text-decoration:none}
.brand .sigil{width:28px;height:28px;flex:none;fill:#fff}
.brand .sigil path{fill:#fff}
.brand .wordmark{font-family:var(--font-sans);font-weight:700;font-size:.82rem;letter-spacing:.22em;text-transform:uppercase}
.footer-brand .brand .sigil{width:30px;height:30px}
.nav-links{display:flex;align-items:center;gap:1.5rem;font-size:.82rem;font-family:var(--font-mono);letter-spacing:.05em}
.nav-links a{color:hsl(var(--muted-foreground));text-transform:uppercase}
.nav-links a:hover{color:hsl(var(--foreground));text-decoration:none}
.nav-links a.active{color:hsl(var(--foreground))}
.nav-right{display:flex;align-items:center;gap:10px}
/* mobile burger (CSS-only, no JS): hidden checkbox toggles the product nav dropdown */
.nav-toggle{position:absolute;opacity:0;width:0;height:0;pointer-events:none}
.burger{display:none}
/* login button — outline pill (from aboutapp-nav__login, inverted for dark) */
.btn-login{display:inline-flex;min-height:36px;align-items:center;justify-content:center;padding:0 16px;
  border:1px solid hsl(var(--foreground)/.65);border-radius:2rem;background:transparent;color:hsl(var(--foreground));
  font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap;transition:.15s}
.btn-login:hover{text-decoration:none;background:hsl(var(--foreground));color:#000;transform:translateY(-1px)}
/* language segmented toggle (from aboutapp-lang, inverted for dark) */
.lang{display:inline-flex;gap:2px;padding:4px;background:hsl(var(--foreground)/.08);border-radius:2rem}
.lang a{padding:6px 12px;font-size:12px;font-weight:600;letter-spacing:.08em;color:hsl(var(--foreground)/.5);border-radius:2rem;transition:.15s}
.lang a:hover{text-decoration:none;color:hsl(var(--foreground))}
.lang a.on{color:#000;background:hsl(var(--foreground))}
.btn-outline{display:inline-flex;align-items:center;gap:.45rem;border-radius:2rem;font-weight:600;font-size:.82rem;padding:.55rem 1.05rem;font-family:var(--font-mono);background:transparent;color:hsl(var(--foreground));border:1px solid hsl(var(--border))}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:2rem 1.5rem 4rem}
.back{display:inline-flex;align-items:center;gap:.4rem;font-family:var(--font-mono);font-size:.8rem;color:hsl(var(--muted-foreground));margin-bottom:1.4rem;letter-spacing:.03em}
.back:hover{color:hsl(var(--foreground));text-decoration:none}
.crumbs{font-family:var(--font-mono);font-size:.74rem;color:hsl(var(--muted-foreground));margin-left:.9rem;letter-spacing:.03em}
.crumbs a{color:hsl(var(--muted-foreground))}
.crumbs a:hover{color:hsl(var(--foreground));text-decoration:none}
.crumbs .sep{opacity:.45;margin:0 .35rem}

/* ---------- cards ---------- */
.card{background:hsl(var(--card));border:1px solid hsl(var(--border));border-radius:var(--radius)}
.hero-card{padding:2.4rem 2.4rem 2.3rem;margin-bottom:1.1rem;position:relative;overflow:hidden;display:flex;align-items:center;gap:2.2rem}
.hero-main{flex:1;min-width:0}
.hero-panel{flex:none;width:32%;max-width:270px;display:flex;align-items:center;justify-content:center}
.hero-panel img{width:100%;height:auto;display:block;mix-blend-mode:screen}
.content-card{padding:2.4rem 2.4rem 2.6rem}
.eyebrow{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:hsl(var(--muted-foreground));margin-bottom:1rem;display:inline-flex;align-items:center;gap:.5rem}
h1.marker{font-family:var(--font-marker);font-weight:400;font-size:clamp(2rem,4vw,2.7rem);line-height:.94;letter-spacing:.04em;margin:.1em 0 .5rem;text-transform:uppercase}
h1.plain{font-size:clamp(1.9rem,4vw,2.6rem);line-height:1.12;font-weight:800;letter-spacing:-.02em;margin:.1em 0 .5rem}
.hero-sub{font-size:1rem;color:hsl(0 0% 66%);margin:0 0 .2rem;max-width:46rem;line-height:1.65}
.hero-main p{color:hsl(var(--muted-foreground))}
.hero-main .btn-cta{margin-top:1rem}
/* CTA pill button (from homepage "Открыть приложение") */
.btn-cta{display:inline-flex;align-items:center;gap:.45rem;background:hsl(var(--foreground));color:#000;padding:.7rem 1.3rem;border-radius:2rem;font-weight:600;font-size:.9rem;line-height:1;transition:.15s;text-decoration:none}
.btn-cta:hover{text-decoration:none;transform:translateY(-1px);background:#fff}
/* CTA inside prose must beat .prose a (white text) — keep black text, no underline, own line */
.prose a.btn-cta,.hero-main a.btn-cta{color:#000;text-decoration:none}
.prose p:has(> a.btn-cta:only-child){margin-top:1.1rem}
.hero-badges{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.4rem}
.hbadge{font-family:var(--font-mono);font-size:.72rem;color:hsl(var(--foreground));border:1px solid hsl(var(--border));border-radius:2rem;padding:.3rem .8rem;background:hsl(var(--secondary))}
.service-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-top:1.2rem}
.service-link{display:block;padding:1.35rem;border:1px solid hsl(var(--border));border-radius:1rem;background:hsl(var(--card-2));transition:.15s}
.service-link:hover{border-color:hsl(var(--muted-foreground));transform:translateY(-1px);text-decoration:none}
.service-link strong{display:block;font-size:1.05rem;margin-bottom:.35rem}
.service-link span{display:block;color:hsl(var(--muted-foreground));font-size:.9rem;line-height:1.55}

/* content-card inner H1 (mirrors live: eyebrow + bold sans title inside content card) */
.content-head{margin-bottom:1.6rem}
.content-head .eyebrow{margin-bottom:.7rem}
.content-head h2.doc-title{font-size:1.55rem;font-weight:800;margin:0 0 .3rem;letter-spacing:-.01em}

/* notice / summary box (nested card) */
.notice{background:hsl(var(--secondary));border:1px solid hsl(var(--border));border-radius:1rem;padding:1.2rem 1.4rem;margin:0 0 1.6rem}
.notice .lbl{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:hsl(var(--foreground));margin-bottom:.5rem}
.notice p{margin:0;color:hsl(var(--foreground)/.92)}

/* toc */
.toc{border:1px dashed hsl(var(--border));border-radius:1rem;padding:1.1rem 1.4rem;margin:0 0 2rem}
.toc .lbl{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:hsl(var(--muted-foreground));margin-bottom:.75rem}
.toc ol{list-style:none;margin:0;padding:0;columns:2;column-gap:2.2rem}
.toc li{margin:.3em 0;font-size:.92rem;break-inside:avoid;counter-increment:toc}
.toc li::before{content:counter(toc,decimal-leading-zero);font-family:var(--font-mono);font-size:.7rem;color:hsl(var(--muted-foreground));margin-right:.6rem}
.toc{counter-reset:toc}
.toc a{color:hsl(var(--muted-foreground))}
.toc a:hover{color:hsl(var(--foreground));text-decoration:none}

/* ---------- prose ---------- */
.prose h2{font-size:1.3rem;line-height:1.3;font-weight:600;letter-spacing:-.005em;margin:2.2em 0 .7em;scroll-margin-top:90px}
.prose h3{font-size:1.05rem;font-weight:600;margin:1.7em 0 .5em}
.prose p{margin:0 0 1.05em;color:hsl(0 0% 66%);font-size:.97rem;line-height:1.72}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.3em}
.prose li{margin:.4em 0;color:hsl(0 0% 66%);font-size:.97rem}
.prose ul li::marker{color:hsl(var(--muted-foreground))}
.prose ol li::marker{color:hsl(var(--muted-foreground));font-family:var(--font-mono);font-size:.85em}
.prose strong{color:hsl(var(--foreground));font-weight:700}
.prose a{color:hsl(var(--foreground));text-decoration:underline;text-decoration-color:hsl(var(--muted-foreground));text-underline-offset:3px}
.prose a:hover{text-decoration-color:hsl(var(--foreground));color:#fff}
.prose hr{border:none;border-top:1px solid hsl(var(--border));margin:2.4em 0}
.prose blockquote{margin:1.4em 0;padding:.1em 0;color:hsl(var(--muted-foreground));font-style:italic}
.prose code{background:hsl(var(--muted));padding:.12em .4em;border-radius:.35rem;font-size:.88em;font-family:var(--font-mono)}
.table-scroll{overflow-x:auto;margin:1.5em 0;border:1px solid hsl(var(--border));border-radius:1rem}
.prose table{border-collapse:collapse;width:100%;font-size:.92rem}
.prose th,.prose td{border-bottom:1px solid hsl(var(--border));padding:.7rem 1rem;text-align:left;vertical-align:top}
.prose td:not(:last-child),.prose th:not(:last-child){border-right:1px solid hsl(var(--border))}
.prose thead th{background:hsl(var(--secondary));color:hsl(var(--foreground));font-weight:600;font-family:var(--font-mono);font-size:.78rem;letter-spacing:.03em;text-transform:uppercase}
.prose tbody tr:last-child td{border-bottom:none}
.prose tbody tr:nth-child(even){background:hsl(var(--card-2))}
/* wrap-up callout: last <p> after final <hr> */
.prose > hr:last-of-type + p{background:hsl(var(--secondary));border:1px solid hsl(var(--border));border-radius:1rem;padding:1.1rem 1.3rem;color:hsl(var(--foreground));margin-top:1.4em}

/* inline CTA link that ends articles ("[Get →](/…)") already styled as link */

/* ---------- FAQ accordion ---------- */
.faq{margin:1em 0 .5em}
.faq-item{border:1px solid hsl(var(--border));border-radius:.9rem;margin:.55rem 0;background:hsl(var(--card-2));overflow:hidden}
.faq-item[open]{border-color:hsl(var(--muted-foreground)/.5)}
.faq-item summary{cursor:pointer;list-style:none;padding:1rem 1.25rem;font-weight:600;font-size:1.02rem;color:hsl(var(--foreground));display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-family:var(--font-mono);color:hsl(var(--muted-foreground));font-size:1.3rem;line-height:1;transition:transform .2s;flex:none}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:hover{color:#fff}
.faq-a{padding:0 1.25rem 1.15rem;color:hsl(var(--foreground)/.82)}
.faq-a p{margin:0}
.faq-a a{color:hsl(var(--foreground));text-decoration:underline;text-decoration-color:hsl(var(--muted-foreground))}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid hsl(var(--border));margin-top:3.5rem}
.footer-inner{max-width:72rem;margin:0 auto;padding:3rem 1.5rem 1.5rem;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:2.5rem}
.footer-brand .brand{margin-bottom:.8rem}
.footer-brand p{color:hsl(var(--muted-foreground));font-size:.9rem;max-width:24rem;margin:.2rem 0 0}
.footer-inner h4{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:hsl(var(--muted-foreground));margin:0 0 .9rem}
.footer-inner ul{list-style:none;margin:0;padding:0}
.footer-inner li{margin:.45em 0}
.footer-inner a{color:hsl(var(--muted-foreground));font-size:.92rem}
.footer-inner a:hover{color:hsl(var(--foreground));text-decoration:none}
.footer-bottom{border-top:1px solid hsl(var(--border));max-width:72rem;margin:0 auto;padding:1.3rem 1.5rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
.footer-bottom .copy{font-family:var(--font-mono);font-size:.74rem;color:hsl(var(--muted-foreground));letter-spacing:.04em;display:inline-flex;align-items:center;gap:.5rem}
.socials{display:inline-flex;align-items:center;gap:.5rem;flex-wrap:wrap}
.socials .cap{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:hsl(var(--muted-foreground));margin-right:.3rem}
.socials a{font-family:var(--font-mono);font-size:.74rem;color:hsl(var(--muted-foreground));border:1px solid hsl(var(--border));border-radius:2rem;padding:.28rem .7rem}
.socials a:hover{color:hsl(var(--foreground));border-color:hsl(var(--foreground));text-decoration:none}

/* ---------- responsive ---------- */
@media(max-width:820px){
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .toc ol{columns:1}
}
@media(max-width:640px){
  body{font-size:16px}
  .burger{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:36px;height:36px;padding:9px;border:1px solid hsl(var(--border));border-radius:.7rem;background:transparent;cursor:pointer}
  .burger span,.burger::before,.burger::after{content:"";display:block;height:2px;width:100%;background:hsl(var(--foreground));border-radius:2px}
  .nav-links{display:none;position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:hsl(var(--background));border-bottom:1px solid hsl(var(--border));padding:.4rem 1.1rem .7rem;box-shadow:0 12px 24px hsl(0 0% 0%/.5)}
  .nav-toggle:checked ~ .nav-links{display:flex}
  .nav-links a{display:block;width:100%;padding:.9rem .2rem;font-size:.95rem;border-bottom:1px solid hsl(var(--border)/.4)}
  .nav-links a:last-child{border-bottom:none}
  .nav{padding:0 1.1rem;gap:.5rem}
  .nav-right{gap:6px}
  .btn-login{min-height:32px;padding:0 12px;font-size:11px}
  .lang a{padding:5px 9px}
  .brand .wordmark{font-size:.76rem;letter-spacing:.18em}
  .hero-card,.content-card{padding:1.5rem 1.3rem}
  .service-grid{grid-template-columns:1fr}
  .hero-card{flex-direction:column-reverse;align-items:flex-start;gap:1rem}
  .hero-panel{width:52%;max-width:200px;align-self:center}
  .wrap{padding:1.5rem 1rem 3rem}
  .footer-inner{grid-template-columns:1fr;gap:1.8rem}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .prose h2{font-size:1.25rem}
}