:root {
  --primary: #006BFF;
  --primary-dark: #0052cc;
  --primary-light: #e8f1ff;
  --fg: #0B3558;
  --fg-soft: #476788;
  --bg: #ffffff;
  --surface: #F8F9FB;
  --border: #E5E7EB;
  --border-light: #F0F3F8;
  --card: #ffffff;
  --code-bg: #0B1B3A;
  --code-fg: #E6EDF7;
  --success: #14AA51;
  --success-bg: #ECFDF5;
  --danger: #DC2626;
  --danger-bg: #FEF2F2;
  --warn: #B45309;
  --warn-bg: #FFF8EC;
  --radius: 10px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 3px rgba(11, 53, 88, 0.06);
  --shadow-md: 0 6px 18px rgba(11, 53, 88, 0.08);
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, 'JetBrains Mono', Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); text-decoration: underline; }

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
}
.brand:hover { text-decoration: none; }
.brand .dot { color: var(--primary); }
.brand-icon { width: 30px; height: 30px; flex-shrink: 0; border-radius: 7px; }
.brand-sub {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 8px;
  border-radius: var(--radius-pill);
  margin-left: 6px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  flex-wrap: wrap;
}
.nav-links a {
  color: var(--fg-soft);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 8px;
}
.nav-links a:hover { color: var(--fg); background: var(--surface); text-decoration: none; }
.nav-links a.active { color: var(--primary); background: var(--primary-light); }

.btn-primary, .btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .15s ease;
  font-family: var(--font);
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; text-decoration: none; }
.btn-outline { background: transparent; color: var(--fg); border-color: var(--border); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

.hero {
  padding: 56px 24px 32px;
  text-align: center;
  background:
    radial-gradient(900px 400px at 50% -20%, rgba(0,107,255,.10), transparent 60%),
    var(--bg);
}
.hero .badge {
  display: inline-block;
  padding: 6px 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-light);
  border: 1px solid rgba(0,107,255,.18);
  border-radius: var(--radius-pill);
  margin-bottom: 18px;
}
.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.15;
  color: var(--fg);
}
.hero .grad {
  background: linear-gradient(135deg, var(--primary), #6B9FFF);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p.lede {
  font-size: 16px;
  color: var(--fg-soft);
  max-width: 720px;
  margin: 0 auto;
}

.container { max-width: 960px; margin: 0 auto; padding: 24px; }

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}
.panel-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.panel-header h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--fg);
}
.panel-body { padding: 20px; }

.grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
input, select, textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: 14px var(--font);
  background: var(--bg);
  color: var(--fg);
  transition: border-color .15s ease, box-shadow .15s ease;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,107,255,.15);
}
textarea {
  font-family: var(--font-mono);
  font-size: 13px;
  min-height: 160px;
  line-height: 1.55;
}
.hint {
  font-size: 12px;
  color: var(--fg-soft);
  margin-top: 6px;
  line-height: 1.45;
}
.hint code { background: var(--surface); }

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 16px; }

code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--surface);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-light);
}
pre {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 14px 16px;
  border-radius: var(--radius);
  overflow: auto;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

#mount {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 12px;
  min-height: 200px;
  background: var(--surface);
}
.empty {
  color: var(--fg-soft);
  font-style: italic;
  padding: 32px;
  text-align: center;
}

.status-line { font-size: 13px; color: var(--fg-soft); margin-bottom: 10px; }
.ok { color: var(--success); font-weight: 600; }
.err { color: var(--danger); font-weight: 600; }

.callout {
  margin: 0 0 18px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-left-width: 3px;
  border-radius: 6px;
  background: var(--surface);
  font-size: 14px;
  color: var(--fg);
}
.callout.info    { border-left-color: var(--primary); background: var(--primary-light); }
.callout strong { color: var(--fg); font-weight: 600; }

.footer {
  background: var(--surface);
  border-top: 1px solid var(--border-light);
  padding: 24px;
  color: var(--fg-soft);
  font-size: 13px;
  text-align: center;
}
.footer a { color: var(--fg-soft); }
.footer a:hover { color: var(--primary); }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B0F17;
    --card: #161B22;
    --surface: #131820;
    --fg: #E6EDF3;
    --fg-soft: #9AA4B2;
    --border: #2A323D;
    --border-light: #1E252E;
    --code-bg: #04070D;
    --primary-light: #102140;
  }
  .nav { background: rgba(11, 15, 23, .85); }
  code { color: var(--fg); }
}