/* ВЛИВA v2 — editorial / аналитический отчёт. ТЗ docs/TZ-SITE-REDESIGN.md.
   Светлая бумага + ОДИН акцент (переменная --accent). Дисплей-шрифт для ЦИФР. Мотив «график роста». */
@import url('https://fonts.googleapis.com/css2?family=Unbounded:wght@500;700;800&family=IBM+Plex+Sans:wght@400;500;600&display=swap');

/* ── ВАРИАНТ АКЦЕНТА (A = сине-фиолетовый MAX). Для варианта B поменять эти 2 строки. ── */
:root{
  --accent:#1F5CFF; --accent-soft:#E6EDFF;
  --paper:#F3EFE6; --card:#FBF8F2; --ink:#17140F; --muted:#6E6656; --line:#E4DDCD;
  --deep:#151310; --deep-ink:#EFE9DC;
  --wrap:1120px; --r:14px;
  --f-disp:'Unbounded',system-ui,sans-serif; --f-body:'IBM Plex Sans',system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.wrap.narrow{max-width:820px}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--f-disp);font-weight:700;line-height:1.05;letter-spacing:-.02em}
em{font-style:normal;color:var(--accent)}
b{font-weight:600}

/* ── growth-line motif ── */
.spark{display:block}
.spark polyline{fill:none;stroke:var(--accent);stroke-width:2.4;vector-effect:non-scaling-stroke;stroke-linecap:round;stroke-linejoin:round}
.spark circle{fill:var(--accent)}

/* ── buttons ── */
.btn-accent{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;font-family:var(--f-disp);font-weight:600;font-size:15px;padding:13px 22px;border-radius:999px;transition:transform .15s,box-shadow .15s;box-shadow:0 6px 18px -8px var(--accent)}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 12px 26px -10px var(--accent)}
.btn-accent.lg{font-size:16px;padding:16px 28px}
.btn-ghost{display:inline-flex;align-items:center;gap:7px;padding:12px 18px;border:1.5px solid var(--line);border-radius:999px;background:var(--card);font-weight:600;font-size:14px;transition:border-color .15s,transform .15s}
.btn-ghost:hover{border-color:var(--accent);transform:translateY(-2px)}
.btn-ghost img{width:18px;height:18px}
.btn-ghost.inv{background:transparent;border-color:#3a352c;color:var(--deep-ink)}
.btn-ghost.inv:hover{border-color:var(--accent)}

/* ── nav ── */
.nav{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:20px;height:66px}
.brand{font-family:var(--f-disp);font-weight:800;letter-spacing:.02em;font-size:20px}
.nav-links{display:flex;gap:22px;margin-left:auto;font-size:15px;font-weight:500}
.nav-links a{color:var(--muted)}.nav-links a:hover{color:var(--ink)}
.nav-cta{padding:9px 18px}

/* ── section frame ── */
.band{padding:74px 0;border-top:1px solid var(--line)}
.band.paper{background:var(--card)}
.snum{font-family:var(--f-disp);font-weight:600;font-size:13px;letter-spacing:.16em;color:var(--accent);text-transform:uppercase;margin-bottom:14px}
.sh{font-size:clamp(1.7rem,3.4vw,2.6rem);max-width:16ch}
.note{margin-top:22px;color:var(--muted);max-width:70ch;font-size:15.5px}
.lead-c{color:var(--muted);max-width:62ch;margin-top:6px;font-size:18px}

/* ── HERO ── */
.hero{padding:64px 0 40px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.eyebrow{font-family:var(--f-disp);font-weight:500;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.hero h1{font-size:clamp(2.3rem,5.2vw,4rem);font-weight:800;margin:16px 0 18px}
.hero-sub{font-size:19px;color:var(--muted);max-width:48ch}
.price-anchor{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin:26px 0;padding:16px 22px;background:var(--accent-soft);border-radius:var(--r);border:1px solid color-mix(in srgb,var(--accent) 20%,var(--line))}
.pa-label{font-size:14px;color:var(--muted);font-weight:500}
.pa-value{font-family:var(--f-disp);font-weight:800;font-size:clamp(2rem,5vw,3rem);color:var(--accent);letter-spacing:-.03em;line-height:1}
.pa-note{font-size:13px;color:var(--muted)}
.hero-cta{display:flex;align-items:center;gap:12px;flex-wrap:wrap}

/* ── KPI card ── */
.kpi-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:0 20px 50px -30px rgba(20,15,10,.45)}
.hero-card{position:relative}
.kc-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:4px}
.kc-head .spark{width:110px;height:30px}
.kc-tag{font-family:var(--f-disp);font-weight:600;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);padding:5px 10px;border-radius:999px}
.kc-title{font-family:var(--f-disp);font-weight:600;font-size:15px;color:var(--muted);margin-bottom:16px}
.kc-stats{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.kc-stat b{display:block;font-family:var(--f-disp);font-weight:800;font-size:clamp(1.6rem,4vw,2.3rem);letter-spacing:-.03em;line-height:1}
.kc-stat span{font-size:13px;color:var(--muted)}
.kc-foot{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted)}

/* ── compare (накрутка vs живые) ── */
.vs-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:30px}
.vs-card{border-radius:var(--r);padding:26px;border:1px solid var(--line)}
.vs-card.them{background:transparent}
.vs-card.them .vs-h{color:var(--muted)}
.vs-card.us{background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 25%,var(--line))}
.vs-card.us .vs-h{color:var(--accent)}
.vs-h{font-family:var(--f-disp);font-weight:700;font-size:19px;margin-bottom:14px}
.vs-card ul{list-style:none}
.vs-card li{padding:11px 0 11px 26px;position:relative;border-top:1px solid var(--line);font-size:15.5px}
.vs-card li:first-child{border-top:0}
.vs-card.them li::before{content:"✕";position:absolute;left:0;color:#B4392B;font-weight:700}
.vs-card.us li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}

/* ── case ── */
.case-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:36px;margin-top:30px;align-items:start}
.case-text p{margin-bottom:14px;font-size:16px}
.case-kpis{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.kpi-card.sm{padding:18px}
.kpi-card.sm b{display:block;font-family:var(--f-disp);font-weight:800;font-size:clamp(1.7rem,4vw,2.4rem);letter-spacing:-.03em;line-height:1;color:var(--ink)}
.kpi-card.sm span{font-size:13px;color:var(--muted);display:block;margin-top:4px}
.kpi-card.sm em{font-style:normal;font-size:12px;color:var(--accent);display:block;margin-top:6px}
.kpi-card.sm.hot{background:var(--accent);border-color:var(--accent)}
.kpi-card.sm.hot b,.kpi-card.sm.hot span,.kpi-card.sm.hot em{color:#fff}
.insight{display:flex;align-items:center;gap:18px;margin-top:28px;padding:22px 24px;background:var(--card);border-left:3px solid var(--accent);border-radius:0 var(--r) var(--r) 0}
.insight .spark{width:120px;height:34px;flex:none}
.insight p{font-size:16px;color:var(--ink)}

/* ── retention (наш блок) ── */
.retention{background:var(--deep);color:var(--deep-ink);border-top:0}
.retention .snum{color:#9b93ff}
.retention .sh{color:#fff}
.retention .lead-c{color:#b9b1a1}
.ret-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:34px}
.ret-card{background:#1f1c17;border:1px solid #2c281f;border-radius:var(--r);padding:24px}
.ret-ic .spark{width:64px;height:22px;margin-bottom:14px}
.ret-card h3{font-size:18px;color:#fff;margin-bottom:8px}
.ret-card p{font-size:15px;color:#b9b1a1}

/* ── steps ── */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px}
.step-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.step-n{font-family:var(--f-disp);font-weight:800;font-size:34px;color:var(--accent);line-height:1;opacity:.9}
.step-card h3{font-size:16.5px;margin:10px 0 6px}
.step-card p{font-size:14.5px;color:var(--muted)}

/* ── faq ── */
details{border-top:1px solid var(--line);padding:6px 0}
details summary{list-style:none;cursor:pointer;font-family:var(--f-disp);font-weight:600;font-size:17px;padding:16px 40px 16px 0;position:relative}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";position:absolute;right:6px;top:14px;font-size:24px;color:var(--accent);transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details .a{padding:0 0 18px;color:var(--muted);font-size:15.5px;max-width:72ch}

/* ── cta band ── */
.cta-band{background:var(--deep);color:var(--deep-ink);padding:70px 0}
.cta-in{text-align:center}
.cta-band h2{font-size:clamp(1.8rem,4vw,2.6rem);color:#fff;max-width:20ch;margin:0 auto 12px}
.cta-band p{color:#b9b1a1;max-width:52ch;margin:0 auto 26px;font-size:17px}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ── footer ── */
.foot{background:#100e0b;color:#8f887a;padding:44px 0;font-size:14px}
.foot-in{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.foot-brand .brand{color:#efe9dc;margin-bottom:10px}
.foot-brand p{max-width:42ch}
.foot-legal{text-align:right;display:flex;flex-direction:column;gap:6px}
.foot-copy{margin-top:8px}

/* ── reveal (staggered) ── */
@keyframes up{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.reveal{animation:up .6s both}
.reveal.d1{animation-delay:.08s}.reveal.d2{animation-delay:.16s}
.reveal.d3{animation-delay:.24s}.reveal.d4{animation-delay:.32s}
@media (prefers-reduced-motion:reduce){.reveal{animation:none}}

/* ── responsive ── */
@media (max-width:900px){
  .hero-grid,.case-grid{grid-template-columns:1fr;gap:30px}
  .ret-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
}
@media (max-width:560px){
  body{font-size:16px}
  .band{padding:52px 0}
  .vs-grid,.steps-grid,.kc-stats,.case-kpis{grid-template-columns:1fr}
  .nav-cta{margin-left:auto}
  .foot-legal{text-align:left}
  .price-anchor{gap:8px}
}

/* ════════════ БЛОГ (editorial) ════════════ */
.crumbs{font-size:13.5px;color:var(--muted);padding:26px 0 0}
.crumbs a{color:var(--muted)}.crumbs a:hover{color:var(--accent)}
.crumbs .sep{margin:0 8px;opacity:.5}

/* ── индекс блога ── */
.blog-head{padding:40px 0 8px}
.blog-head .eyebrow{margin-bottom:12px}
.blog-head h1{font-size:clamp(2rem,4.4vw,3.1rem);font-weight:800;max-width:20ch}
.blog-head p{color:var(--muted);max-width:60ch;margin-top:14px;font-size:18px}
.post-list{padding:34px 0 74px;display:grid;gap:18px}
.post-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px 28px;transition:border-color .15s,transform .15s,box-shadow .15s}
.post-card:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line));transform:translateY(-2px);box-shadow:0 18px 44px -30px rgba(20,15,10,.5)}
.post-card .pc-date{font-family:var(--f-disp);font-weight:600;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.post-card h2{font-size:clamp(1.25rem,2.4vw,1.6rem);font-weight:700;margin:8px 0 10px;letter-spacing:-.01em}
.post-card p{color:var(--muted);font-size:15.5px;max-width:74ch}
.post-card .pc-more{display:inline-block;margin-top:14px;font-family:var(--f-disp);font-weight:600;font-size:14px;color:var(--accent)}

/* ── страница статьи ── */
.art-wrap{max-width:760px;margin:0 auto;padding:0 24px}
.art-head{padding:20px 0 4px}
.art-head h1{font-size:clamp(2rem,4.6vw,3rem);font-weight:800;letter-spacing:-.02em;line-height:1.08}
.art-meta{margin-top:16px;font-size:14px;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.art-meta .dot{opacity:.4}
.art-body{padding:24px 0 8px;font-size:18px;line-height:1.72}
.art-body h2{font-size:clamp(1.4rem,3vw,1.9rem);font-weight:700;margin:40px 0 14px;letter-spacing:-.01em}
.art-body h3{font-size:clamp(1.15rem,2.4vw,1.4rem);font-weight:600;margin:30px 0 10px}
.art-body p{margin:0 0 18px}
.art-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.art-body a:hover{text-decoration-thickness:2px}
.art-body ul,.art-body ol{margin:0 0 20px;padding-left:24px}
.art-body li{margin:0 0 9px}
.art-body b{font-weight:600}
.art-body table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:15.5px}
.art-body th,.art-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.art-body th{background:var(--card);font-family:var(--f-disp);font-weight:600;font-size:14px}
.art-body hr{border:0;border-top:1px solid var(--line);margin:30px 0}
.art-body em{font-style:italic;color:var(--muted)}
/* CTA-плашка внутри статьи */
.art-cta{margin:36px 0 8px;padding:28px 30px;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 22%,var(--line));border-radius:var(--r)}
.art-cta h3{font-family:var(--f-disp);font-weight:700;font-size:20px;margin-bottom:8px}
.art-cta p{font-size:15.5px;color:var(--muted);margin-bottom:16px;max-width:60ch}
/* похожие */
.art-related{margin-top:44px;padding-top:30px;border-top:1px solid var(--line)}
.art-related h3{font-family:var(--f-disp);font-weight:600;font-size:15px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:16px}
.rel-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.rel-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;transition:border-color .15s,transform .15s}
.rel-card:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line));transform:translateY(-2px)}
.rel-card b{display:block;font-family:var(--f-disp);font-weight:600;font-size:15.5px;line-height:1.25}
@media (max-width:640px){.rel-grid{grid-template-columns:1fr}.art-body{font-size:16.5px}}