:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2330;
  --border: #30363d;
  --fg: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --green: #3fb950;
  --radius: 12px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  background: var(--bg) radial-gradient(1200px 600px at 50% -10%, #1b2230, var(--bg)) no-repeat;
  min-height: 100vh;
  color: var(--fg);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* top navigation */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 20px;
  padding: 14px 24px;
  background: rgba(13, 17, 23, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav .brand { font-weight: 700; letter-spacing: -0.01em; color: var(--fg); display: flex; align-items: center; gap: 8px; }
.nav .brand .dot { width: 9px; height: 9px; border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--green)); box-shadow: 0 0 10px var(--accent); }
.nav .spacer { flex: 1; }
.nav a.link { color: var(--muted); font-size: 14px; }
.nav a.link:hover { color: var(--fg); text-decoration: none; }

.wrap { max-width: 860px; margin: 0 auto; padding: 72px 24px 120px; }
.wrap.docs { max-width: 900px; }

/* hero */
header.hero { text-align: center; margin-bottom: 56px; }
.badge {
  display: inline-block; font-family: var(--mono); font-size: 12px;
  color: var(--muted); border: 1px solid var(--border);
  border-radius: 999px; padding: 4px 12px; margin-bottom: 24px;
}
h1 { font-size: 46px; line-height: 1.08; margin: 0 0 16px; letter-spacing: -0.02em; }
h1 .grad {
  background: linear-gradient(90deg, var(--accent), var(--green));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.sub { font-size: 19px; color: var(--muted); max-width: 580px; margin: 0 auto 28px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 11px 20px; border-radius: 10px; font-weight: 600; font-size: 15px;
}
.btn.primary { background: var(--accent); color: #0b1220; }
.btn.primary:hover { text-decoration: none; filter: brightness(1.08); }
.btn.ghost { border: 1px solid var(--border); color: var(--fg); }
.btn.ghost:hover { text-decoration: none; border-color: var(--muted); }

section { margin-top: 48px; }
h2 { font-size: 15px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 0 0 16px; }
.docs h2 { font-size: 24px; text-transform: none; letter-spacing: -0.01em; color: var(--fg);
  margin: 48px 0 16px; padding-top: 12px; }
.docs h3 { font-size: 17px; margin: 28px 0 10px; }
.docs p { color: #c9d1d9; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 680px) { .grid { grid-template-columns: 1fr; } h1 { font-size: 36px; } }

.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 22px; margin-bottom: 16px;
}
.card h3 { margin: 0 0 12px; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.card .tag { color: var(--muted); font-weight: 400; font-size: 13px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

pre {
  background: #010409; border: 1px solid var(--border); border-radius: 8px;
  padding: 14px 16px; overflow-x: auto; margin: 0 0 16px;
  font-family: var(--mono); font-size: 13.5px; color: #c9d1d9; line-height: 1.55;
}
pre .c { color: var(--muted); }
pre .k { color: var(--accent); }
pre .s { color: var(--green); }
code.inline { font-family: var(--mono); font-size: 0.9em; background: #010409;
  border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; }

.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps li { position: relative; padding-left: 44px; margin-bottom: 18px; }
.steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: -2px; width: 28px; height: 28px;
  display: grid; place-items: center; border-radius: 999px;
  background: var(--panel); border: 1px solid var(--border);
  font-family: var(--mono); font-size: 13px; color: var(--accent);
}

table { width: 100%; border-collapse: collapse; font-size: 14px; margin-bottom: 16px; }
th { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); color: var(--muted);
  font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
td { padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
table.mono td:first-child { font-family: var(--mono); color: var(--green); white-space: nowrap; font-size: 13px; }
td .muted { color: var(--muted); }

.callout { border-left: 2px solid var(--accent); background: var(--panel-2);
  padding: 14px 18px; border-radius: 0 8px 8px 0; margin-bottom: 16px; font-size: 14px; }
.callout.warn { border-left-color: #d29922; }
.callout strong { color: var(--fg); }

.disclaimer { font-size: 13px; color: var(--muted); border-left: 2px solid var(--border);
  padding-left: 14px; margin-top: 56px; }

/* docs layout with sidebar */
.doc-layout { display: grid; grid-template-columns: 200px 1fr; gap: 40px; align-items: start; }
@media (max-width: 760px) { .doc-layout { grid-template-columns: 1fr; } .toc { display: none; } }
.toc { position: sticky; top: 80px; font-size: 14px; }
.toc ul { list-style: none; padding: 0; margin: 0; border-left: 1px solid var(--border); }
.toc li a { display: block; padding: 6px 0 6px 14px; color: var(--muted); margin-left: -1px;
  border-left: 1px solid transparent; }
.toc li a:hover { color: var(--fg); text-decoration: none; border-left-color: var(--accent); }

footer { border-top: 1px solid var(--border); margin-top: 80px; padding: 28px 24px;
  text-align: center; color: var(--muted); font-size: 13px; }