:root {
  --bg: #fafbfc;
  --bg-elevated: #ffffff;
  --bg-code: #f1f5f9;
  --fg: #0f172a;
  --fg-muted: #475569;
  --fg-subtle: #94a3b8;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --accent: #06b6d4;
  --accent-2: #6366f1;
  --warn: #f59e0b;
  --warn-bg: #fef3c7;
  --warn-fg: #92400e;
  --ok-bg: #d1fae5;
  --ok-fg: #065f46;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow:    0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 20px 50px -20px rgba(15, 23, 42, 0.18);
  --radius: 10px;
  --topbar-h: 60px;
  --sidebar-w: 260px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --bg-elevated: #111827;
    --bg-code: #1e293b;
    --fg: #f1f5f9;
    --fg-muted: #94a3b8;
    --fg-subtle: #64748b;
    --border: #1e293b;
    --border-strong: #334155;
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent-2); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--accent); }

code, pre, .path {
  font-family: 'JetBrains Mono', ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-feature-settings: 'liga' 0;
}

/* ===== Top bar ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  color: var(--fg);
}
.brand:hover { color: var(--fg); }
.brand .muted { color: var(--fg-subtle); font-weight: 500; }

.topbar-actions { display: flex; align-items: center; gap: 10px; }
.primary-btn, .ghost-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}
.primary-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: 0 1px 3px rgba(99, 102, 241, 0.3);
}
.primary-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4); color: #fff; }
.ghost-btn {
  color: var(--fg);
  background: transparent;
  border-color: var(--border-strong);
}
.ghost-btn:hover { color: var(--fg); border-color: var(--accent); background: var(--bg-elevated); }

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 6px;
  color: var(--fg);
  cursor: pointer;
}

/* ===== Layout ===== */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  max-width: 1400px;
  margin: 0 auto;
}

/* ===== Sidebar ===== */
.sidebar {
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  padding: 24px 16px 48px 24px;
  border-right: 1px solid var(--border);
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }

.nav-group { margin-bottom: 22px; }
.nav-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-subtle);
  padding: 0 10px;
  margin-bottom: 6px;
}
.nav-link {
  display: block;
  padding: 6px 10px;
  font-size: 14px;
  color: var(--fg-muted);
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.1s;
  border-left: 2px solid transparent;
}
.nav-link:hover { color: var(--fg); background: var(--bg-elevated); }
.nav-link.active {
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-left-color: var(--accent);
  font-weight: 600;
}
.nav-link.sub { padding-left: 22px; font-size: 13px; }

/* ===== Main content ===== */
.content {
  padding: 36px 48px 96px;
  max-width: 880px;
  width: 100%;
  min-width: 0;
}

section { margin-bottom: 56px; scroll-margin-top: calc(var(--topbar-h) + 16px); }
h1, h2, h3, h4 {
  color: var(--fg);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
  scroll-margin-top: calc(var(--topbar-h) + 16px);
}
h1 { font-size: 44px; margin: 0 0 16px; letter-spacing: -0.025em; }
h2 { font-size: 28px; margin: 0 0 16px; padding-top: 16px; border-top: 1px solid var(--border); }
section:first-of-type h2 { padding-top: 0; border-top: 0; }
h3 { font-size: 20px; margin: 32px 0 12px; }
h4 { font-size: 16px; margin: 22px 0 8px; }
p  { margin: 0 0 14px; color: var(--fg-muted); }
ul, ol { margin: 0 0 14px; padding-left: 24px; color: var(--fg-muted); }
li { margin-bottom: 4px; }

strong { color: var(--fg); font-weight: 700; }

/* Inline code */
:not(pre) > code {
  background: var(--bg-code);
  color: var(--fg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
  font-weight: 500;
  border: 1px solid var(--border);
}

/* Code blocks */
pre {
  background: var(--bg-code);
  color: var(--fg);
  padding: 16px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.55;
  margin: 0 0 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
pre code { background: transparent; border: 0; padding: 0; font-weight: 500; }

/* Path badge (e.g. /admin/wallets) */
.path {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  font-size: 0.55em;
  font-weight: 600;
  color: var(--accent-2);
  background: color-mix(in srgb, var(--accent-2) 8%, transparent);
  border-radius: 999px;
  vertical-align: middle;
  letter-spacing: 0.04em;
}

/* Tables */
table {
  width: 100%;
  margin: 0 0 18px;
  border-collapse: collapse;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
thead { background: var(--bg-elevated); }
th, td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
th {
  font-weight: 600;
  color: var(--fg);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
td { color: var(--fg-muted); }
tbody tr:last-child td { border-bottom: 0; }

/* Callouts */
.callout {
  padding: 14px 18px;
  margin: 16px 0;
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-elevated));
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  color: var(--fg-muted);
  font-size: 14px;
}
.callout strong { color: var(--fg); }
.callout.warn {
  background: var(--warn-bg);
  border-color: var(--warn);
  border-left-color: var(--warn);
  color: var(--warn-fg);
}
.callout.warn strong { color: var(--warn-fg); }
@media (prefers-color-scheme: dark) {
  .callout.warn {
    background: color-mix(in srgb, var(--warn) 12%, var(--bg-elevated));
    color: #fcd34d;
  }
  .callout.warn strong { color: #fde68a; }
}

/* ===== Hero ===== */
.hero {
  margin-bottom: 64px;
  padding-bottom: 32px;
}
.hero-eyebrow {
  display: inline-block;
  margin-bottom: 16px;
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-2);
  background: color-mix(in srgb, var(--accent-2) 10%, transparent);
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent-2) 25%, transparent);
}
.hero .lead {
  font-size: 19px;
  line-height: 1.55;
  color: var(--fg-muted);
  margin: 0 0 28px;
  max-width: 640px;
}
.hero-cta {
  display: flex;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.hero-cta .primary-btn, .hero-cta .ghost-btn { padding: 12px 20px; font-size: 14px; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 32px;
}
.feature-card {
  padding: 18px 20px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.15s;
}
.feature-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  box-shadow: var(--shadow);
}
.feature-icon { font-size: 22px; margin-bottom: 8px; }
.feature-card h3 { font-size: 15px; margin: 0 0 4px; }
.feature-card p { font-size: 13px; margin: 0; line-height: 1.5; }

/* ===== Footer ===== */
.page-footer {
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--fg-subtle);
  font-size: 13px;
}
.page-footer p { margin: 0; color: var(--fg-subtle); }

/* ===== Responsive ===== */
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    background: var(--bg-elevated);
    border-right: 1px solid var(--border);
    transform: translateX(-100%);
    transition: transform 0.2s;
    z-index: 40;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }
  .menu-toggle { display: inline-flex; align-items: center; }
  .content { padding: 28px 20px 64px; }
  h1 { font-size: 34px; }
  h2 { font-size: 24px; }
  .ghost-btn { display: none; }
}

@media (max-width: 540px) {
  .topbar { padding: 0 16px; }
  .brand span:first-of-type { font-size: 14px; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero .lead { font-size: 16px; }
  h1 { font-size: 28px; }
  .primary-btn, .ghost-btn { font-size: 12px; padding: 7px 12px; }
}