:root {
  --bg:             #0a0a0b;
  --bg-raised:      #101012;
  --bg-elevated:    #16161a;
  --fg:             #ededee;
  --fg-muted:       #8b8b92;
  --fg-dim:         #55555a;
  --border:         #1c1c20;
  --border-strong:  #2a2a2f;
  --accent:         #f38020;
  --accent-hover:   #fb9142;
  --accent-soft:    rgba(243, 128, 32, 0.08);
  --accent-glow:    rgba(243, 128, 32, 0.30);
  --sans: 'Geist', -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --sidebar-w: 260px;
  --content-max: 820px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

::selection { background: var(--accent); color: var(--bg); }

a { color: var(--accent); text-decoration: none; transition: color 160ms var(--ease); }
a:hover { color: var(--accent-hover); }

img { max-width: 100%; display: block; }

body::before {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none;
  opacity: 0.035;
  mix-blend-mode: overlay;
  z-index: 999;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* Top nav */
.topnav {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(10, 10, 11, 0.78);
  border-bottom: 1px solid var(--border);
}
.topnav .inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.wordmark { display: inline-flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 600; font-size: 16px; letter-spacing: -0.01em; }
.wordmark img { width: 22px; height: 22px; }
.wordmark .tag { color: var(--fg-muted); font-weight: 400; font-size: 13px; padding-left: 10px; border-left: 1px solid var(--border-strong); margin-left: 4px; }
.topnav-links { display: flex; gap: 20px; align-items: center; }
.topnav-links a { color: var(--fg-muted); font-size: 14px; font-weight: 500; }
.topnav-links a:hover { color: var(--fg); }
.topnav-links a.cta { color: var(--accent); }

/* Mobile sidebar toggle */
.menu-btn {
  display: none;
  background: transparent; border: 1px solid var(--border-strong);
  color: var(--fg); padding: 6px 10px; border-radius: 6px;
  font-size: 13px; cursor: pointer;
}

/* Layout */
.docs-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  gap: 48px;
  align-items: start;
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 64px;
  align-self: start;
  padding: 32px 0;
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  font-size: 14px;
}
.sidebar h3 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-dim);
  margin: 24px 0 8px;
  font-weight: 600;
}
.sidebar h3:first-child { margin-top: 0; }
.sidebar ul { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.sidebar a {
  display: block;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--fg-muted);
  font-weight: 400;
  transition: background 140ms var(--ease), color 140ms var(--ease);
}
.sidebar a:hover { background: var(--bg-raised); color: var(--fg); }
.sidebar a.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}

/* Content */
.content {
  padding: 40px 0 96px;
  min-width: 0;
  max-width: var(--content-max);
}
.page-header { margin-bottom: 40px; }
.page-header .eyebrow {
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.page-header h1 {
  font-size: 40px;
  letter-spacing: -0.02em;
  font-weight: 600;
  line-height: 1.15;
  margin-bottom: 16px;
}
.page-header .lede {
  color: var(--fg-muted);
  font-size: 18px;
  line-height: 1.55;
  max-width: 640px;
}

.content section { margin-bottom: 48px; }
.content h2 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  scroll-margin-top: 80px;
}
.content h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 24px 0 8px;
  scroll-margin-top: 80px;
}
.content p { margin: 0 0 14px; color: var(--fg); }
.content p + p { margin-top: 0; }
.content ul, .content ol { padding-left: 22px; margin: 0 0 16px; color: var(--fg); }
.content li { margin-bottom: 6px; }
.content strong { color: var(--fg); font-weight: 600; }

/* Code */
code {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--fg);
}
pre {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  overflow-x: auto;
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
}
pre code { background: transparent; border: none; padding: 0; }

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 24px;
  font-size: 14px;
}
th, td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}
th { color: var(--fg-muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
td code { font-size: 12px; }

/* Figures */
figure {
  margin: 24px 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-raised);
}
figure img { width: 100%; display: block; }
figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--fg-muted);
  border-top: 1px solid var(--border);
  background: var(--bg);
}

/* Callouts */
.callout {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: var(--bg-raised);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 18px 0;
  font-size: 14px;
  color: var(--fg);
}
.callout strong { color: var(--accent); }
.callout.warn { border-left-color: #d97706; }
.callout.warn strong { color: #f59e0b; }
.callout.info { border-left-color: #3b82f6; }
.callout.info strong { color: #60a5fa; }

/* Card list (used on intro page) */
.card-list {
  list-style: none; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
  margin: 0;
}
.card-list li { margin: 0; display: flex; }
.card-list a {
  display: block;
  flex: 1;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-raised);
  color: var(--fg);
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}
.card-list a:hover { border-color: var(--border-strong); transform: translateY(-1px); color: var(--fg); }
.card-list strong { display: block; color: var(--fg); margin-bottom: 4px; font-size: 15px; }
.card-list span { color: var(--fg-muted); font-size: 13px; line-height: 1.5; }

/* Kbd */
kbd {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 2px 6px;
  color: var(--fg);
}

/* Page footer (prev/next) */
.page-nav {
  display: flex; justify-content: space-between; gap: 16px;
  margin-top: 64px; padding-top: 24px;
  border-top: 1px solid var(--border);
}
.page-nav a {
  flex: 1;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-raised);
  color: var(--fg);
  font-size: 14px;
  transition: border-color 160ms var(--ease);
}
.page-nav a:hover { border-color: var(--accent); color: var(--fg); }
.page-nav .label { display: block; color: var(--fg-muted); font-size: 12px; margin-bottom: 4px; }
.page-nav .next { text-align: right; }

/* Responsive */
@media (max-width: 880px) {
  .docs-shell { grid-template-columns: 1fr; gap: 0; padding: 0 20px; }
  .menu-btn { display: inline-flex; }
  .sidebar {
    position: fixed;
    inset: 56px 0 auto 0;
    top: 56px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 20px 24px;
    max-height: calc(100vh - 56px);
    z-index: 90;
    display: none;
  }
  .sidebar.open { display: block; }
  .content { padding: 24px 0 64px; }
  .page-header h1 { font-size: 30px; }
  .topnav-links a:not(.cta) { display: none; }
}