/* ============================================================
   OSNOVANO — BRAND SYSTEM 2026
   Токены и общие компоненты для всех страниц
   ============================================================ */
:root{
  --ink:#08090A;
  --panel:#0E1013;
  --graphite:#1E2226;
  --line:#1E2226;
  --line-hi:#33393F;
  --mute:#797F86;
  --paper:#EDEDEA;
  --white:#FFFFFF;
  --signal:#FF5A1F;
  --signal-dim:#5c2a15;
  --display:"Unbounded",system-ui,sans-serif;
  --body:"Onest",system-ui,sans-serif;
  --mono:"JetBrains Mono",monospace;
  --wrap:1240px;
  --ease:cubic-bezier(.22,1,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--ink);color:var(--paper);
  font-family:var(--body);font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
::selection{background:var(--signal);color:#fff}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--mute)}
.signal{color:var(--signal)}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:60;border-bottom:1px solid transparent;transition:background .3s,border-color .3s}
.nav.stuck{background:rgba(8,9,10,.82);backdrop-filter:blur(14px);border-bottom-color:var(--line)}
.nav-in{max-width:var(--wrap);margin:0 auto;padding:15px 28px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;gap:11px}
.brand .mark{width:28px;height:28px;overflow:visible}
.brand b{font-family:var(--display);font-weight:700;font-size:14px;letter-spacing:.14em}
.nav-links{display:flex;gap:26px;font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.nav-links a{color:var(--mute);transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--paper)}
.nav-tg{font-family:var(--mono);font-size:12px;letter-spacing:.08em;border:1px solid var(--line-hi);border-radius:2px;padding:8px 15px;transition:border-color .2s,color .2s}
.nav-tg:hover{border-color:var(--signal);color:var(--signal)}
.burger{display:none;background:none;border:0;color:var(--paper);font-size:20px;cursor:pointer;line-height:1}

/* ---------- знак FLOW: вечное свечение ---------- */
.flow-mark .base{fill:none;stroke:var(--signal-dim);stroke-width:10.5;stroke-linecap:round;stroke-linejoin:round}
.flow-mark .spark{fill:none;stroke:var(--signal);stroke-width:10.5;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:26 94;filter:drop-shadow(0 0 4px var(--signal));animation:flowrun 2.6s linear infinite}
.flow-mark .spark.s2{animation-delay:-.87s}
.flow-mark .spark.s3{animation-delay:-1.74s}
@keyframes flowrun{from{stroke-dashoffset:120}to{stroke-dashoffset:0}}

/* ---------- кнопки ---------- */
.btn{display:inline-flex;align-items:center;gap:11px;background:var(--signal);color:#0A0500;font-family:var(--mono);font-weight:700;font-size:13px;letter-spacing:.06em;text-transform:uppercase;padding:16px 28px;border-radius:2px;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 40px -14px var(--signal)}
.btn-ghost{display:inline-flex;align-items:center;gap:11px;background:transparent;color:var(--paper);border:1px solid var(--line-hi);font-family:var(--mono);font-size:13px;letter-spacing:.06em;text-transform:uppercase;padding:15px 28px;border-radius:2px;transition:border-color .2s,color .2s,transform .2s}
.btn-ghost:hover{border-color:var(--signal);color:var(--signal);transform:translateY(-2px)}

/* ---------- секции ---------- */
.sec{padding:120px 0;border-top:1px solid var(--line)}
.sec-head{display:flex;align-items:baseline;gap:20px;margin-bottom:52px}
.sec-head h2{font-family:var(--display);font-weight:700;font-size:clamp(26px,3.4vw,42px);letter-spacing:-.02em;line-height:1.1}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.rv.in{opacity:1;transform:none}

/* ---------- footer ---------- */
.foot{padding:40px 0 54px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;align-items:center}
.foot .fl{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.foot span{font-family:var(--mono);font-size:11px;color:var(--mute);letter-spacing:.08em}
.foot a{font-family:var(--mono);font-size:11px;color:var(--mute);letter-spacing:.08em;transition:color .2s}
.foot a:hover{color:var(--paper)}

@media(max-width:820px){
  .sec{padding:80px 0}
  .sec-head{margin-bottom:36px}
}
@media(max-width:680px){
  .nav-links{display:none}
  .burger{display:block}
  .nav-links.open{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:var(--ink);border-bottom:1px solid var(--line)}
  .nav-links.open a{padding:15px 28px;border-top:1px solid var(--line)}
}
@media(prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto}
  .rv{opacity:1;transform:none}
  .flow-mark .spark{animation:none;stroke-dashoffset:0;stroke-dasharray:none;opacity:.9}
}

/* ============= внутренние страницы: общий герой ============= */
.page-hero{padding:150px 0 0}
.page-crumb{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--mute);display:inline-flex;gap:10px;transition:color .2s}
.page-crumb:hover{color:var(--paper)}
.page-h1{font-family:var(--display);font-weight:900;font-size:clamp(32px,5.5vw,72px);line-height:1;letter-spacing:-.03em;margin:24px 0 20px}
.page-lede{font-size:clamp(17px,1.6vw,21px);color:var(--mute);max-width:56ch;line-height:1.6}
@media(max-width:680px){.page-hero{padding:110px 0 0}}