:root{
  --bg:#07081A; --line:rgba(150,160,255,.14); --line2:rgba(150,160,255,.26);
  --text:#EEF0FF; --muted:#A4AAD0; --dim:#6B7099;
  --violet:#8B5CF6; --lav:#A78BFA; --cyan:#2EC4FF; --ok:#34D399;
  --grad:linear-gradient(100deg,#A78BFA 0%,#8B5CF6 30%,#5B5FFF 55%,#2EC4FF 85%,#5BE0FF 100%);
  --gut:clamp(16px,4vw,40px);
  color-scheme:dark;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--text);font-family:Manrope,system-ui,sans-serif;font-size:17px;line-height:1.7;overflow-x:clip;-webkit-font-smoothing:antialiased;
  background-image:radial-gradient(900px 500px at 85% -10%,rgba(139,92,246,.22),transparent 70%),radial-gradient(600px 400px at -10% 30%,rgba(46,196,255,.08),transparent 70%);background-repeat:no-repeat}
a{color:var(--lav);text-decoration:none}
a:hover{color:#fff}
.mono{font-family:"JetBrains Mono",ui-monospace,monospace}

/* nav (same as home) */
.nav{position:sticky;top:14px;z-index:50;padding:0 var(--gut);margin-top:14px}
.nav-in{max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:20px;padding:10px 10px 10px 18px;border:1px solid var(--line);border-radius:999px;background:rgba(9,10,32,.88);box-shadow:0 10px 40px -10px #000a}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--text);white-space:nowrap}
.brand img{width:30px;height:30px;flex:none}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{padding:9px 14px;border-radius:999px;font-size:15px;color:var(--muted)}
.nav-links a:hover,.nav-links a[aria-current]{color:var(--text);background:rgba(255,255,255,.06)}
.btn{display:inline-flex;align-items:center;height:42px;padding:0 18px;border-radius:999px;font-weight:700;font-size:15px;color:#fff;background:linear-gradient(100deg,#8B5CF6,#5B5FFF 55%,#2EC4FF);white-space:nowrap}
.btn:hover{color:#fff}

/* document */
.doc{max-width:780px;margin:0 auto;padding:70px var(--gut) 40px}
.tag{font:500 12px/1 "JetBrains Mono",monospace;letter-spacing:.16em;text-transform:uppercase;color:var(--lav);display:flex;gap:12px;align-items:center;margin-bottom:20px}
.tag::before{content:"";width:28px;height:1px;background:var(--lav)}
h1{font-weight:800;font-size:clamp(36px,5.4vw,58px);line-height:1.04;letter-spacing:-.04em;margin-bottom:16px}
h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.meta{font:500 13px/1.6 "JetBrains Mono",monospace;color:var(--dim);margin-bottom:28px}
.lead{font-size:19px;color:var(--muted);margin-bottom:28px}
h2{font-size:26px;font-weight:800;letter-spacing:-.02em;line-height:1.2;margin:52px 0 14px;scroll-margin-top:100px}
h3{font-size:18px;font-weight:700;margin:26px 0 8px}
p{margin:0 0 14px;color:#D4D7F0}
ul,ol{margin:0 0 16px;padding-left:22px;color:#D4D7F0}
li{margin:6px 0;padding-left:4px}
li::marker{color:var(--lav)}
strong{color:#fff}
em{color:var(--muted)}
.toc{margin:6px 0 10px;padding:22px 26px;border:1px solid var(--line);border-radius:22px;background:rgba(255,255,255,.025)}
.toc ol{columns:2;column-gap:30px;margin:0}
.toc li{break-inside:avoid;margin:3px 0}
.toc a{color:var(--muted)}
.toc a:hover{color:#fff}
.card{margin:16px 0;padding:22px 24px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(180deg,#11143a,#0b0d27)}
.card h2{margin-top:0}
.steps{list-style:none;padding:0;counter-reset:s}
.steps li{counter-increment:s;position:relative;padding-left:48px;margin:14px 0}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:32px;height:32px;border-radius:10px;display:grid;place-items:center;background:rgba(139,92,246,.18);color:var(--lav);font-weight:800;font-size:15px}
.ru{color:var(--dim);font-weight:500}
.note{margin-top:30px;padding:18px 22px;border-radius:18px;border:1px solid rgba(52,211,153,.35);background:rgba(52,211,153,.08);color:#CFF5E6}
.mail{font-family:"JetBrains Mono",monospace}

/* footer */
footer{max-width:1200px;margin:60px auto 0;padding:30px var(--gut) 40px;color:var(--dim);font-size:14px}
.foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:26px}
.foot nav{display:flex;flex-wrap:wrap;gap:22px}
.foot a{color:var(--dim)}
.foot a:hover{color:var(--text)}

@media (max-width:760px){
  .nav-links{display:none}
  .nav .btn{margin-left:auto}
  .nav-in{padding:8px 8px 8px 14px}
  .doc{padding-top:44px}
  .toc ol{columns:1}
  h2{font-size:23px;margin-top:42px}
}