:root {
  --bg: #0b0f17;
  --panel: #121826;
  --panel-2: #0f1624;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --border: #1f2937;
  --accent: #60a5fa;
  --accent-2: #22d3ee;
  --code-bg: #0a0f1a;
  --code-text: #e2e8f0;
  --green: #34d399;
  --orange: #fbbf24;
  --red: #f87171;
  --shadow: 0 18px 40px rgba(2, 6, 23, 0.5);
  --radius-md: 10px;
  --radius-lg: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: var(--text);
  background: radial-gradient(800px 400px at 10% -10%, rgba(56,189,248,0.08), transparent 60%),
              radial-gradient(900px 500px at 90% -10%, rgba(96,165,250,0.08), transparent 60%),
              var(--bg);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 15, 23, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 24px;
}

.brand {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.2px;
}

.subtitle {
  color: var(--muted);
  margin: 6px 0 0;
  font-size: 13px;
}

.layout {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 24px;
}

.layout > main {
  flex: 1 1 auto;
  min-width: 0;
}

.sidebar {
  position: -webkit-sticky;
  position: sticky;
  top: 84px;
  align-self: start;
  flex: 0 0 280px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 16px;
  max-height: calc(100vh - 108px);
  display: flex;
  flex-direction: column;
}

.sidebar h3 {
  margin: 0 0 12px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.nav {
  display: grid;
  gap: 8px;
  font-size: 14px;
  overflow: auto;
  padding-right: 4px;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  background: transparent;
}

.nav a:hover {
  background: rgba(148, 163, 184, 0.08);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 20px;
}

.panel h1,
.panel h2 {
  margin: 0 0 8px;
  font-size: 22px;
}

.panel p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.intro {
  display: grid;
  gap: 16px;
}

.inputs {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.field {
  display: grid;
  gap: 6px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.field input {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--panel-2);
}

.section {
  margin-top: 26px;
}

.section h2,
.section h3 {
  margin: 0 0 6px;
  font-size: 22px;
}

.section p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
}

.grid {
  display: grid;
  gap: 12px;
}

.grid.cards {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.endpoint {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  background: var(--panel-2);
}

.endpoint-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.step {
  font-weight: 700;
  color: var(--accent-2);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  background: var(--panel-2);
}

.card h3 {
  margin: 0 0 6px;
  font-size: 15px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  background: var(--panel-2);
  font-weight: 600;
  font-size: 13px;
}

.btn:hover {
  background: rgba(148, 163, 184, 0.08);
}

.meta {
  color: var(--muted);
  font-size: 13px;
  margin-top: 6px;
  line-height: 1.5;
}

.code {
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: var(--radius-md);
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-word;
  border: 1px solid #0f172a;
}

.code.copyable {
  cursor: pointer;
}

.code.copyable:hover {
  border-color: var(--accent);
}

.row {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.row-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.callout {
  border-left: 3px solid var(--accent);
  background: rgba(15, 22, 36, 0.9);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  color: var(--muted);
  font-size: 13px;
}

.toc-sub {
  margin-left: 10px;
  display: grid;
  gap: 6px;
  font-size: 13px;
}

.group {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: rgba(15, 22, 36, 0.6);
  padding: 16px;
}

.group h4 {
  margin: 0 0 10px;
  font-size: 16px;
}

.method {
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 11px;
  border: 1px solid var(--border);
  background: #0b1220;
}

.method.get { color: var(--accent); }
.method.post { color: var(--green); }
.method.put { color: var(--orange); }
.method.patch { color: var(--orange); }
.method.delete { color: var(--red); }

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  background: #0f172a;
  color: #e2e8f0;
  border: 1px solid #1f2937;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 12px;
  opacity: 0;
  transform: translateY(10px);
  transition: 0.2s ease;
  pointer-events: none;
  box-shadow: var(--shadow);
}

.toast.show { opacity: 1; transform: translateY(0); }

.footer {
  padding: 10px 24px 30px;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 980px) {
  .layout {
    flex-direction: column;
  }
  .sidebar { position: static; }
}