:root{
  --bg-main:#0b0d12;
  --bg-panel:rgba(26,32,38,.7);
  --border-color:rgba(52,71,81,.6);
  --text-main:#fff;
  --text-secondary:#b8c4cc;
  --text-muted:#7a8a94;
  --accent:#94defe;
  --accent-2:#5eb8db;
  --grad:linear-gradient(135deg,#94defe,#5eb8db);
  --ease:cubic-bezier(.4,0,.2,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg-main);color:var(--text-secondary);
  font-family:'Inter',system-ui,sans-serif;font-size:15px;line-height:1.75;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:'';position:fixed;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(800px 480px at 50% -120px,rgba(148,222,254,.06),transparent 70%);
}
.aurora{position:fixed;border-radius:50%;filter:blur(90px);pointer-events:none;z-index:0;opacity:.4}
.aurora.a1{width:560px;height:560px;top:-260px;right:-160px;background:radial-gradient(circle,rgba(148,222,254,.11),transparent 65%)}
.aurora.a2{width:460px;height:460px;bottom:-200px;left:-180px;background:radial-gradient(circle,rgba(94,184,219,.08),transparent 65%)}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

#sbar{position:fixed;top:0;left:0;height:2.5px;width:100%;z-index:100;background:var(--grad);
  transform:scaleX(0);transform-origin:left;box-shadow:0 0 12px rgba(148,222,254,.5)}

.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(11,13,18,.75);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(52,71,81,.35);
}
.nav-in{max-width:1120px;margin:0 auto;padding:15px 24px;display:flex;align-items:center;gap:18px}
.logo{display:flex;align-items:baseline;gap:8px;font-weight:800;font-size:20px;letter-spacing:-.5px;color:var(--text-main)}
.logo b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo span{font-size:10px;font-weight:600;letter-spacing:2px;color:var(--text-muted);text-transform:uppercase}
.nav .crumb{font-size:12px;color:var(--text-muted);letter-spacing:1px;text-transform:uppercase;font-weight:600}
.lang-links{margin-left:auto;display:flex;align-items:center;gap:2px;padding:3px;border-radius:10px;
  background:rgba(255,255,255,.04);border:1px solid var(--border-color)}
.lang-links a{padding:6px 11px;border-radius:8px;font-size:12px;font-weight:700;letter-spacing:.5px;
  color:var(--text-muted);transition:color .2s var(--ease),background .2s var(--ease)}
.lang-links a:hover{color:var(--text-main);text-decoration:none}
.lang-links a.on{color:#0b0d12;background:var(--grad)}
.nav .back{
  margin-left:14px;display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:11px;
  background:rgba(255,255,255,.04);border:1px solid var(--border-color);color:var(--text-main);
  font-size:13px;font-weight:600;transition:background .25s var(--ease),border-color .25s var(--ease);
}
@media(max-width:560px){.nav .crumb{display:none}.lang-links a{padding:6px 9px}}
.nav .back:hover{background:rgba(148,222,254,.07);border-color:rgba(148,222,254,.4);text-decoration:none}

.wrap{max-width:1120px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.doc-head{padding:140px 0 36px}
.eyebrow{
  display:flex;align-items:center;gap:14px;font-size:11px;font-weight:700;letter-spacing:2px;
  text-transform:uppercase;color:var(--accent);margin-bottom:16px;
}
.eyebrow::after{content:'';flex:1;height:1px;background:linear-gradient(90deg,rgba(148,222,254,.35),transparent)}
h1{font-size:42px;font-weight:800;letter-spacing:-1.5px;line-height:1.12;color:var(--text-main);margin-bottom:14px}
.meta{font-size:13px;color:var(--text-muted);margin-bottom:22px}
.lead{
  background:var(--bg-panel);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--border-color);border-left:3px solid var(--accent);border-radius:16px;
  padding:22px 26px;font-size:15px;color:var(--text-secondary);max-width:800px;
}
.doc-tabs{display:flex;gap:8px;margin:26px 0 0;flex-wrap:wrap}
.doc-tabs a{
  padding:9px 18px;border-radius:999px;font-size:13px;font-weight:600;color:var(--text-muted);
  background:rgba(255,255,255,.04);border:1px solid var(--border-color);
  transition:color .25s var(--ease),border-color .25s var(--ease);
}
.doc-tabs a:hover{color:var(--text-main);border-color:rgba(148,222,254,.4);text-decoration:none}
.doc-tabs a.on{
  color:#0b0d12;background:var(--grad);border-color:transparent;
  box-shadow:0 4px 16px rgba(148,222,254,.25);
}
@media(max-width:760px){h1{font-size:30px}.doc-head{padding-top:110px}}

.doc-body{display:grid;grid-template-columns:250px 1fr;gap:52px;padding:36px 0 90px;align-items:start}
.toc{
  position:sticky;top:100px;
  background:var(--bg-panel);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--border-color);border-radius:16px;padding:20px;
}
.toc b{
  display:block;font-size:10px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;
  color:var(--text-muted);margin-bottom:12px;
}
.toc a{
  display:block;padding:6px 10px;margin:0 -10px;border-radius:8px;font-size:13px;color:var(--text-muted);
  border-left:2px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.toc a:hover{color:var(--text-main);text-decoration:none}
.toc a.on{color:var(--accent);border-left-color:var(--accent);background:rgba(148,222,254,.05)}
@media(max-width:900px){
  .doc-body{grid-template-columns:1fr;gap:28px}
  .toc{position:static}
}

.doc{max-width:760px;min-width:0}
.doc section{margin-bottom:44px;scroll-margin-top:100px}
h2{
  display:flex;align-items:baseline;gap:12px;font-size:22px;font-weight:700;letter-spacing:-.4px;
  color:var(--text-main);margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid rgba(255,255,255,.06);
}
h2 .num{color:var(--accent);font-size:15px;font-weight:800;font-variant-numeric:tabular-nums}
h3{font-size:15.5px;font-weight:600;color:var(--text-main);margin:20px 0 8px}
.doc p{margin-bottom:12px}
.doc ul{list-style:none;margin:0 0 14px;display:flex;flex-direction:column;gap:8px}
.doc ul li{position:relative;padding-left:26px}
.doc ul li::before{content:'—';position:absolute;left:0;top:0;color:var(--accent);font-weight:600}
.doc b{color:var(--text-main);font-weight:600}
.note{
  background:rgba(148,222,254,.05);border:1px solid rgba(148,222,254,.18);border-radius:14px;
  padding:16px 20px;font-size:13.5px;color:var(--text-secondary);margin:16px 0;
}
.note::before{content:'Примечание';display:block;font-size:10px;font-weight:700;letter-spacing:1.5px;
  text-transform:uppercase;color:var(--accent);margin-bottom:6px}
.ph{color:#fbbf24;border-bottom:1px dashed rgba(251,191,36,.5)}
.doc table{width:100%;border-collapse:collapse;font-size:13.5px;margin:14px 0}
.doc th{
  text-align:left;font-size:10px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;
  color:var(--text-muted);padding:8px 12px 8px 0;border-bottom:1px solid rgba(255,255,255,.08);
}
.doc td{padding:10px 12px 10px 0;border-bottom:1px solid rgba(255,255,255,.05);vertical-align:top}

.rev{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.rev.on{opacity:1;transform:none}

footer{border-top:1px solid rgba(52,71,81,.35);padding:24px 0;position:relative;z-index:1}
.foot{display:flex;align-items:center;gap:20px;flex-wrap:wrap;font-size:12.5px;color:var(--text-muted)}
.foot .links{margin-left:auto;display:flex;gap:18px}
.foot a{color:var(--text-secondary)}
.foot a:hover{color:var(--accent)}
@media(max-width:640px){.foot{flex-direction:column;align-items:flex-start;gap:10px}.foot .links{margin-left:0;flex-wrap:wrap}}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .rev{opacity:1;transform:none}
}