:root{
  --bg:#000;
  --bg-panel:#0b0604;
  --bg-card:#130a05;
  --ink:#f6efe6;
  --ink-dim:#9a8a7a;
  --ink-mute:#6a5d52;
  --amber:#F59E0B;
  --amber-hot:#F97316;
  --amber-deep:#D97706;
  --amber-line:rgba(217,119,6,.28);
  --mono:'JetBrains Mono', ui-monospace, Menlo, monospace;
  --sans:'Inter', system-ui, sans-serif;
  --max:1100px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased}
a{color:var(--ink);text-decoration:none;border-bottom:1px solid var(--amber-line)}
a:hover{color:var(--amber);border-color:var(--amber)}
::selection{background:var(--amber);color:#000}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:linear-gradient(180deg,#000 85%,rgba(0,0,0,.6));border-bottom:1px solid rgba(255,255,255,.04);backdrop-filter:blur(8px)}
.nav-inner{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:auto 1fr auto;align-items:center;padding:16px 28px;gap:24px}
.brand{display:flex;align-items:center;border:0}
.brand-lockup{height:30px;width:auto;display:block}
.nav-crumb{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--ink-mute);display:flex;gap:10px;align-items:center;justify-self:start}
.nav-crumb a{color:var(--ink-dim);border:0}
.nav-crumb a:hover{color:#fff}
.nav-crumb .sep{color:var(--ink-mute)}
.nav-crumb .cur{color:var(--amber);text-transform:uppercase;letter-spacing:.22em}
.start-flying{
  font-family:var(--mono);font-weight:700;font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  background:linear-gradient(180deg,var(--amber-hot),var(--amber-deep));color:#fff;padding:10px 18px;border-radius:10px;
  display:inline-flex;align-items:center;gap:8px;border:0;
  box-shadow:0 0 0 1px rgba(255,255,255,.08) inset, 0 8px 24px -8px rgba(249,115,22,.55);
}
.start-flying:hover{filter:brightness(1.08);color:#fff;border:0}
.start-flying .arrow{width:12px;height:12px}

/* doc */
.doc{
  max-width:var(--max);margin:0 auto;padding:64px 28px 80px;
  display:grid;grid-template-columns:220px 1fr;gap:56px;align-items:start;
}
.doc-head{grid-column:1 / -1;border-bottom:1px dashed rgba(255,255,255,.08);padding-bottom:32px;margin-bottom:8px}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.26em;color:var(--amber);text-transform:uppercase;display:inline-flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor}
h1{font-family:var(--mono);font-weight:500;font-size:clamp(36px,5vw,64px);line-height:1;margin:16px 0 18px;letter-spacing:-.01em}
.doc-meta{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--ink-mute);text-transform:uppercase;display:flex;gap:10px;flex-wrap:wrap}

/* toc */
.toc{position:sticky;top:88px;border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:20px;background:#050302}
.toc h4{font-family:var(--mono);font-size:10px;letter-spacing:.22em;color:var(--amber);text-transform:uppercase;margin:0 0 12px}
.toc ol{list-style:none;counter-reset:toc;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.toc ol li{counter-increment:toc;font-family:var(--mono);font-size:12px;display:flex;gap:10px;align-items:baseline}
.toc ol li::before{content:counter(toc,decimal-leading-zero);color:var(--ink-mute);font-size:10px;letter-spacing:.1em;width:22px;flex:0 0 22px}
.toc a{color:var(--ink-dim);border:0}
.toc a:hover{color:#fff}

/* body */
.doc-body{font-size:15px;line-height:1.65;color:var(--ink-dim);max-width:68ch}
.doc-body h2{font-family:var(--mono);font-weight:500;font-size:22px;color:#fff;letter-spacing:-.01em;margin:40px 0 10px;scroll-margin-top:92px}
.doc-body h2:first-of-type{margin-top:0}
.doc-body p{margin:0 0 16px}
.doc-body ul{padding-left:20px;margin:0 0 16px}
.doc-body ul li{margin-bottom:8px}
.doc-body ul.regions li{list-style:none;padding:10px 14px;border:1px solid rgba(255,255,255,.06);border-radius:8px;margin-bottom:6px;background:#050302;display:flex;justify-content:space-between;gap:16px;align-items:baseline;color:var(--ink)}
.doc-body ul.regions{padding-left:0}
.doc-body ul.regions .note{font-family:var(--mono);font-size:11px;color:var(--ink-mute);letter-spacing:.1em;text-transform:uppercase}
.doc-body .small{font-size:12px;color:var(--ink-mute);font-family:var(--mono)}

/* callout */
.callout{
  border:1px solid var(--amber-line);border-radius:12px;padding:16px 20px;margin:0 0 32px;
  background:radial-gradient(120% 80% at 100% 0%,rgba(249,115,22,.08),transparent 55%),#0a0604;
  display:flex;gap:16px;align-items:center;
}
.callout .tag{font-family:var(--mono);font-size:10px;letter-spacing:.22em;color:var(--amber);text-transform:uppercase;border:1px solid var(--amber-line);padding:4px 8px;border-radius:999px;white-space:nowrap}
.callout p{margin:0;font-size:13px;color:var(--ink-dim);font-family:var(--mono)}

/* footer */
.foot{border-top:1px solid rgba(255,255,255,.06);margin-top:40px}
.foot-inner{max-width:var(--max);margin:0 auto;padding:24px 28px;display:flex;justify-content:space-between;gap:24px;font-family:var(--mono);font-size:12px;color:var(--ink-mute);letter-spacing:.12em;text-transform:uppercase;flex-wrap:wrap}
.foot-inner a{color:var(--ink-dim);border:0}
.foot-inner a:hover{color:#fff}

/* responsive */
@media (max-width:860px){
  .doc{grid-template-columns:1fr;gap:28px}
  .toc{position:static}
  .nav-crumb{display:none}
}