/* ============ нейроcore · copper-graphite system ============ */
:root{
  --bg-0:#0a0c0f;
  --bg-1:#101419;
  --bg-2:#161b22;
  --ink:#ece7df;
  --muted:#a29b90;
  --acc:#e8934e;         /* copper */
  --acc-hi:#ffab5e;      /* ember  */
  --acc-dim:#a86f43;
  --line:rgba(232,147,78,.18);
  --line-soft:rgba(236,231,223,.09);
  --card:rgba(16,20,25,.72);
  --disp:"Play",sans-serif;
  --body:"Golos Text",sans-serif;
  --mono:"JetBrains Mono",monospace;
  --wrap:1120px;
}
*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion:reduce){ html{ scroll-behavior:auto; } }
body{
  margin:0; background:var(--bg-1); color:var(--ink);
  font-family:var(--body); font-size:16px; line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; }
::selection{ background:var(--acc); color:var(--bg-0); }


/* scroll progress */
.scroll-progress{
  position:fixed; top:0; left:0; height:2px; width:0; z-index:50;
  background:linear-gradient(90deg,var(--acc-dim),var(--acc-hi));
}

.wrap{ max-width:var(--wrap); margin:0 auto; padding:0 24px; }

/* ---------- header ---------- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:40;
  display:flex; align-items:center; gap:28px;
  padding:14px 28px;
  background:linear-gradient(180deg, rgba(10,12,15,.88), rgba(10,12,15,.55) 70%, transparent);
  backdrop-filter:blur(6px);
}
.wordmark{
  font-family:var(--disp); font-weight:700; font-size:14px; letter-spacing:.06em;
  text-decoration:none; color:var(--ink); text-transform:uppercase; white-space:nowrap;
  display:inline-flex; align-items:center; min-height:26px;
}
.wordmark b{ color:var(--acc); }
.site-nav{ display:flex; gap:22px; margin-left:auto; }
.site-nav a{
  font-family:var(--mono); font-size:12px; letter-spacing:.12em; text-transform:uppercase;
  color:var(--muted); text-decoration:none; padding:6px 2px; border-bottom:1px solid transparent;
}
.site-nav a:hover,.site-nav a:focus-visible{ color:var(--ink); border-bottom-color:var(--acc); }
.head-cta{
  font-family:var(--disp); font-weight:600; font-size:12px; letter-spacing:.1em; text-transform:uppercase;
  background:var(--acc); color:var(--bg-0); border:1px solid var(--acc);
  padding:9px 16px; text-decoration:none; white-space:nowrap;
}
.head-cta:hover{ background:var(--acc-hi); border-color:var(--acc-hi); }

/* ---------- shared section shell ---------- */
section{ position:relative; z-index:2; }
.section{ padding:110px 0; }
.section-alt{ background:rgba(22,27,34,.55); }
.sysline{
  margin:0 0 14px; font-family:var(--mono); font-size:12px; letter-spacing:.22em;
  text-transform:uppercase; color:var(--acc);
}
.sysline::before{ content:"▸ "; color:var(--acc-dim); }
.h2{
  margin:0 0 18px; font-family:var(--disp); font-weight:700;
  font-size:clamp(26px,3.6vw,40px); line-height:1.15; letter-spacing:.01em;
}
.hot{ color:var(--acc); }
.lede{ margin:0 0 44px; max-width:640px; color:var(--muted); font-size:16px; }

/* ---------- hero ---------- */
.hero{ padding:150px 0 0; min-height:100svh; display:flex; flex-direction:column; }
.hero-bg{ position:absolute; inset:0; z-index:0; overflow:hidden; }
.hero-bg .bg-base{
  position:absolute; inset:0;
  background:url("../img/hero-bg.jpg") center 40% / cover no-repeat;
}
/* trace pulse: brightened high-contrast duplicates — only the glowing copper traces pass the screen blend, so the traces breathe light */
.hero-bg .bg-trace{
  position:absolute; inset:0;
  background:url("../img/hero-bg.jpg") center 40% / cover no-repeat;
  mix-blend-mode:screen; opacity:0;
  will-change:opacity;
}
.hero-bg .bg-trace.a{
  filter:brightness(1.55) contrast(1.45) saturate(1.6);
  animation:trace-a 7s ease-in-out infinite alternate;
}
.hero-bg .bg-trace.b{
  filter:brightness(1.8) contrast(1.6) saturate(1.35) blur(2px);
  animation:trace-b 11s ease-in-out 2.2s infinite alternate;
}
@keyframes trace-a{ from{ opacity:.08; } to{ opacity:.42; } }
@keyframes trace-b{ from{ opacity:.04; } to{ opacity:.30; } }
.hero-bg .bg-shade{
  position:absolute; inset:0;
  background:
    linear-gradient(100deg, var(--bg-0) 6%, rgba(10,12,15,.9) 30%, rgba(10,12,15,.35) 58%, rgba(10,12,15,.05) 82%),
    linear-gradient(180deg, rgba(16,20,25,.75) 0%, transparent 22%, transparent 74%, var(--bg-1) 100%);
}
/* dust layer: semi-transparent drifting particles over the image (drawn in js/main.js) */
.hero-bg #hero-dust{ position:absolute; inset:0; pointer-events:none; }

.hero-inner{ position:relative; z-index:2; max-width:var(--wrap); margin:0 auto; padding:6vh 24px 0; width:100%; }
.hero h1{
  margin:6px 0 22px; font-family:var(--disp); font-weight:700;
  font-size:clamp(34px,6.4vw,80px); line-height:1.06; letter-spacing:.004em;
  max-width:13.5em;
}
.hero h1 .w{ display:inline-block; }
.hero .sub{
  margin:0 0 10px; max-width:34em;
  font-size:clamp(16px,1.6vw,19px); color:var(--ink);
}
.hero .trust{
  margin:0 0 30px; max-width:44em;
  font-family:var(--mono); font-size:12px; line-height:1.9; letter-spacing:.05em; color:var(--muted);
}
.cta-row{ display:flex; flex-wrap:wrap; gap:14px; }
.btn{
  display:inline-block; padding:14px 26px; text-decoration:none;
  font-family:var(--mono); font-size:14px; letter-spacing:.08em;
}
.btn-solid{ background:var(--acc); color:var(--bg-0); border:1px solid var(--acc); }
.btn-solid:hover{ background:var(--acc-hi); border-color:var(--acc-hi); }
.btn-ghost{ background:var(--bg-0); color:var(--ink); border:1px solid var(--line); }
.btn-ghost:hover{ border-color:var(--acc); color:var(--acc); }
.btn-ghost.copied{ border-color:var(--acc); color:var(--acc-hi); }
.foot-note{
  margin-top:26px; font-family:var(--mono); font-size:12px; letter-spacing:.1em;
  text-transform:uppercase; color:var(--muted);
}
.hero-space{ flex:1; min-height:6vh; }

/* marquee */
.marquee{ position:relative; z-index:2; overflow:hidden; border-top:1px solid var(--line-soft); background:rgba(10,12,15,.55); }
.marquee canvas{ display:block; width:100%; height:44px; }

/* agent */
.facts{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line-soft); border:1px solid var(--line-soft); margin-bottom:46px; }
.fact{ background:var(--bg-1); padding:28px 26px 24px; }
.fact-n{ display:block; font-family:var(--disp); font-weight:700; font-size:34px; line-height:1; letter-spacing:.01em; color:var(--acc-hi); }
.fact-t{ display:block; margin:14px 0 12px; font-size:14px; }
.fact-src{ display:block; font-family:var(--mono); font-size:12px; letter-spacing:.08em; color:var(--muted); }
.jobs{ margin-bottom:38px; }
.agent-note{ margin:0 0 14px; max-width:760px; font-size:16px; }
.agent-note b{ color:var(--acc-hi); }
.agent-close{ margin:0; max-width:660px; color:var(--muted); }

/* ---------- how steps ---------- */
.stages-wrap{ position:relative; margin-top:8px; }
.stages-progress{
  position:absolute; left:24px; top:6px; bottom:6px; width:1px; background:var(--line-soft);
}
.stages-progress i{ display:block; width:100%; height:0; background:linear-gradient(180deg,var(--acc),var(--acc-hi)); }
.stages{ list-style:none; margin:0; padding:0; }
.stages li{ display:grid; grid-template-columns:48px 1fr; gap:18px; padding:22px 0; align-items:baseline; }
.stage-n{ font-family:var(--mono); font-size:12px; letter-spacing:.14em; color:var(--acc-dim); }
.stages li.revealed .stage-n{ color:var(--acc); }
.stage-t{ display:block; font-family:var(--disp); font-weight:600; font-size:14px; letter-spacing:.05em; text-transform:uppercase; margin-bottom:6px; }
.stage-d{ color:var(--muted); max-width:560px; }



/* ---------- chat demo ---------- */
.media-grid{ display:grid; grid-template-columns:minmax(340px,640px) 1fr; gap:40px; align-items:start; }
.chat{ border:1px solid var(--line); background:var(--bg-0); }
.chat-head{
  display:flex; align-items:center; gap:8px; padding:12px 16px; border-bottom:1px solid var(--line-soft);
}
.sq{ width:8px; height:8px; border:1px solid var(--acc-dim); }
.sq.fill{ background:var(--acc); border-color:var(--acc); }
.chat-title{ font-family:var(--mono); font-size:12px; letter-spacing:.14em; color:var(--muted); text-transform:uppercase; margin-left:6px; }
.chat-body{ padding:20px 18px; display:flex; flex-direction:column; gap:12px; max-height:440px; overflow-y:auto; scrollbar-width:none; overscroll-behavior:contain; }
.chat-body::-webkit-scrollbar{ width:0; height:0; }
/* низ подсказывает, что диалог продолжается: последние строки растворяются, пока не доскроллил */
.chat-body.fade{ -webkit-mask-image:linear-gradient(to bottom,#000 calc(100% - 56px),transparent 100%); mask-image:linear-gradient(to bottom,#000 calc(100% - 56px),transparent 100%); }
.msg{
  margin:0; max-width:82%; padding:12px 16px;
  border:1px solid var(--line-soft); background:var(--bg-1); font-size:14px; line-height:1.55;
}
.msg-client{ align-self:flex-end; border-color:var(--line); }
.msg-bot{ align-self:flex-start; }
.msg-src{ align-self:flex-start; font-family:var(--mono); font-size:12px; letter-spacing:.06em; color:var(--muted); border:none; padding:0 4px; }
.msg-meta{ font-family:var(--mono); font-size:12px; letter-spacing:.08em; color:var(--muted); margin-right:8px; }
.chat-replies{ padding:0 18px 18px; }
.replies-label{ margin:0 0 10px; font-family:var(--mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); }
.replies-row{ display:flex; flex-wrap:wrap; gap:10px; }
.chip{
  font-family:var(--mono); font-size:12px; letter-spacing:.06em;
  background:var(--bg-1); color:var(--ink); border:1px solid var(--line);
  padding:9px 14px; cursor:pointer;
}
.chip:hover{ border-color:var(--acc); color:var(--acc); }
.chip[disabled]{ opacity:.35; cursor:default; }
.media-side{ padding-top:6px; }
.media-note{ margin:0 0 18px; max-width:62ch; color:var(--muted); font-size:14px; }

/* ---------- pricing rows ---------- */
.price-table{ border-top:1px solid var(--line-soft); }
.price-row{
  display:grid; grid-template-columns:minmax(180px,240px) 1fr minmax(120px,270px);
  gap:24px; align-items:baseline; padding:26px 8px; border-bottom:1px solid var(--line-soft);
}
.price-name{ font-family:var(--disp); font-weight:600; font-size:14px; letter-spacing:.05em; text-transform:uppercase; }
.price-desc{ color:var(--muted); font-size:14px; }
.price-val{ font-family:var(--disp); font-weight:700; font-size:20px; color:var(--acc); white-space:nowrap; text-align:right; font-variant-numeric:tabular-nums; }
.price-val small{ font-family:var(--mono); font-weight:400; font-size:12px; letter-spacing:.1em; color:var(--muted); display:block; margin-top:4px; white-space:normal; }
.price-foot{
  margin:26px 0 0; font-family:var(--mono); font-size:12px; letter-spacing:.1em;
  text-transform:uppercase; color:var(--muted);
}

/* ---------- proof ---------- */
.prooflist{ list-style:none; margin:0; padding:0; display:grid; grid-template-columns:1fr 1fr; gap:26px 40px; }
.proof-t{ display:block; font-family:var(--disp); font-weight:600; font-size:14px; letter-spacing:.06em; text-transform:uppercase; margin-bottom:8px; }
.proof-d{ color:var(--muted); font-size:14px; }

/* ---------- terms ---------- */
.terms-grid{ display:grid; grid-template-columns:1.2fr 1fr; gap:48px; }
.terms-prose p{ margin:0 0 14px; max-width:52ch; }
.terms-facts{ margin:0; }
.terms-facts>div{ display:grid; grid-template-columns:120px 1fr; gap:16px; padding:14px 0; border-top:1px solid var(--line-soft); }
.terms-facts dt{ font-family:var(--mono); font-size:12px; letter-spacing:.12em; text-transform:uppercase; color:var(--acc-dim); padding-top:3px; }
.terms-facts dd{ margin:0; }

/* ---------- faq ---------- */
.faq{ border-top:1px solid var(--line-soft); max-width:820px; }
.faq-item{ border-bottom:1px solid var(--line-soft); }
.faq-q{
  width:100%; display:flex; justify-content:space-between; gap:20px; align-items:center;
  background:none; border:none; cursor:pointer; text-align:left;
  padding:20px 4px; color:var(--ink);
  font-family:var(--disp); font-weight:600; font-size:17px; letter-spacing:.01em;
}
.faq-x{ position:relative; width:14px; height:14px; flex:none; }
.faq-x::before,.faq-x::after{ content:""; position:absolute; background:var(--acc); transition:transform .25s ease; }
.faq-x::before{ left:0; top:6px; width:14px; height:2px; }
.faq-x::after{ left:6px; top:0; width:2px; height:14px; }
.faq-q[aria-expanded="true"] .faq-x::after{ transform:scaleY(0); }
.faq-a{ padding:0 4px 22px; max-width:70ch; }
.faq-a p{ margin:0; color:var(--muted); }

/* ---------- final cta ---------- */
.final-cta{ padding:130px 0; border-top:1px solid var(--line); background:linear-gradient(180deg,var(--bg-1),var(--bg-0)); }
.final-grid{ display:grid; grid-template-columns:1.4fr auto; gap:56px; align-items:center; }
.final-title{ font-size:clamp(28px,4vw,44px); }
.foot-note.pd{ text-transform:none; letter-spacing:.04em; }
.qr-card{ width:230px; padding:22px; border:1px solid var(--line); background:var(--bg-0); text-align:center; }
.qr-cap{ margin-top:12px; font-family:var(--mono); font-size:12px; letter-spacing:.08em; line-height:1.7; color:var(--muted); }

/* ---------- footer ---------- */
.site-footer{ position:relative; z-index:2; background:var(--bg-0); border-top:1px solid var(--line-soft); padding:44px 0; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:36px; }
.foot-small{ font-family:var(--mono); font-size:12px; letter-spacing:.05em; line-height:1.9; color:var(--muted); margin:12px 0 0; }
.foot-nav{ display:flex; flex-direction:column; gap:8px; }
.foot-nav a{ font-family:var(--mono); font-size:12px; letter-spacing:.12em; text-transform:uppercase; color:var(--muted); text-decoration:none; display:inline-block; padding:5px 0; min-height:24px; }
.foot-nav a:hover{ color:var(--acc); }

/* ---------- reveal ---------- */
html.js .reveal{ opacity:0; transform:translateY(16px); transition:opacity .7s ease, transform .7s ease; }
html.js .reveal.revealed{ opacity:1; transform:none; }
html.js .hero h1 .w{ opacity:0; transform:translateY(18px); transition:opacity .8s ease, transform .8s ease; }
html.js .hero.ready h1 .w{ opacity:1; transform:none; }
html.js .hero.ready h1 .w:nth-child(2){ transition-delay:.12s; }
html.js .hero.ready h1 .w:nth-child(3){ transition-delay:.24s; }
html.js .hero.ready h1 .w:nth-child(4){ transition-delay:.36s; }
html.js .hero.ready h1 .w:nth-child(5){ transition-delay:.48s; }
html.js .hero.ready h1 .w:nth-child(6){ transition-delay:.58s; }
html.js .hero.ready h1 .w:nth-child(7){ transition-delay:.68s; }
html.js .hero.ready h1 .w:nth-child(8){ transition-delay:.78s; }

/* ---------- reduced motion: alternative art direction ---------- */
@media (prefers-reduced-motion:reduce){
  .hero-bg .bg-trace{ animation:none; opacity:.2; }
  html.js .reveal{ opacity:1; transform:none; transition:none; }
  html.js .hero h1 .w{ opacity:1; transform:none; transition:none; }
}

/* ---------- responsive ---------- */
@media (max-width:1020px){
  .media-grid,.terms-grid,.final-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .qr-card{ margin-top:10px; }
}
@media (max-width:760px){
  .site-nav{ display:none; }
  .section{ padding:80px 0; }
  .hero{ padding-top:120px; }
  .facts{ grid-template-columns:1fr; }
  .prooflist{ grid-template-columns:1fr; }
  .price-row{ grid-template-columns:1fr; gap:8px; padding:22px 4px; }
  .price-val{ text-align:left; }
  .footer-grid{ grid-template-columns:1fr; }
  .hero-bg .bg-base,.hero-bg .bg-trace{ background-position:64% 42%; }
  .hero-bg .bg-shade{ background:
    linear-gradient(180deg, rgba(10,12,15,.92) 0%, rgba(10,12,15,.62) 46%, rgba(10,12,15,.78) 100%);
  }
}