/* ============================================================
   Developer Hub — Triple-Column API Documentation Layout
   ============================================================ */

/* --- Hero Section --- */
.devhub-hero {
  padding: var(--space-4xl) 0 var(--space-2xl);
  position: relative;
  overflow: hidden;
  background: var(--bg-primary);
}

.devhub-hero .grid-bg {
  opacity: 0.6;
}

.devhub-hero-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  text-align: center;
  position: relative;
  z-index: 2;
}

.devhub-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-md);
}

.devhub-hero .hero-sub {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 620px;
  margin: 0 auto var(--space-xl);
  line-height: 1.7;
}

.devhub-hero .base-url-display {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-lg);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-emerald-glow);
}

.devhub-hero .base-url-display .url-label {
  color: var(--text-tertiary);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
}

.devhub-hero .base-url-display .copy-url-btn {
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.devhub-hero .base-url-display .copy-url-btn:hover {
  background: var(--accent-indigo-muted);
  color: var(--accent-indigo-glow);
}

/* --- Triple Column Layout --- */
.devhub-layout {
  display: grid;
  grid-template-columns: 260px 1fr 380px;
  min-height: calc(100vh - 72px);
  max-width: 1600px;
  margin: 0 auto;
  position: relative;
}

/* --- Left Sidebar --- */
.devhub-sidebar {
  position: sticky;
  top: 72px;
  height: calc(100vh - 72px);
  overflow-y: auto;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  padding: var(--space-lg) 0;
  z-index: 10;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-indigo-muted) transparent;
}

.devhub-sidebar::-webkit-scrollbar {
  width: 4px;
}

.devhub-sidebar::-webkit-scrollbar-thumb {
  background: var(--accent-indigo-muted);
  border-radius: var(--radius-full);
}

.sidebar-search {
  padding: 0 var(--space-lg) var(--space-lg);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--space-md);
}

.sidebar-search-input {
  width: 100%;
  padding: 0.55rem 0.75rem 0.55rem 2.25rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.8rem;
  transition: all var(--transition-fast);
}

.sidebar-search-input:focus {
  border-color: var(--accent-indigo);
  box-shadow: 0 0 0 3px var(--accent-indigo-muted);
}

.sidebar-search-wrapper {
  position: relative;
}

.sidebar-search-wrapper .search-icon {
  position: absolute;
  left: 0.65rem;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  color: var(--text-tertiary);
  pointer-events: none;
}

/* Sidebar nav groups */
.sidebar-nav {
  padding: 0 var(--space-sm);
}

.sidebar-group {
  margin-bottom: var(--space-xs);
}

.sidebar-group-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem var(--space-md);
  font-size: 0.7rem;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  user-select: none;
}

.sidebar-group-title:hover {
  color: var(--text-secondary);
  background: var(--accent-indigo-soft);
}

.sidebar-group-title .chevron-icon {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.sidebar-group.collapsed .sidebar-group-title .chevron-icon {
  transform: rotate(-90deg);
}

.sidebar-group-items {
  overflow: hidden;
  max-height: 500px;
  transition: max-height var(--transition-slow);
}

.sidebar-group.collapsed .sidebar-group-items {
  max-height: 0;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.4rem var(--space-md) 0.4rem var(--space-xl);
  font-size: 0.82rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  cursor: pointer;
  position: relative;
  text-decoration: none;
}

.sidebar-link::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-tertiary);
  transition: all var(--transition-fast);
}

.sidebar-link:hover {
  color: var(--text-primary);
  background: var(--accent-indigo-soft);
}

.sidebar-link:hover::before {
  background: var(--accent-indigo-glow);
}

.sidebar-link.active {
  color: var(--accent-indigo-glow);
  background: var(--accent-indigo-muted);
  font-weight: var(--font-weight-medium);
}

.sidebar-link.active::before {
  width: 6px;
  height: 6px;
  background: var(--accent-indigo);
  box-shadow: 0 0 8px var(--accent-indigo);
}

.sidebar-link .method-badge-sm {
  font-size: 0.6rem;
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  padding: 1px 5px;
  border-radius: 3px;
  text-transform: uppercase;
  margin-left: auto;
  flex-shrink: 0;
}

.method-badge-sm.get {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald-glow);
}

.method-badge-sm.post {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-indigo-glow);
}

.method-badge-sm.put {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber-glow);
}

.method-badge-sm.delete {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

/* --- Center Content --- */
.devhub-content {
  padding: var(--space-2xl) var(--space-3xl);
  overflow-y: auto;
  min-height: calc(100vh - 72px);
}

.doc-section {
  display: none;
  animation: docFadeIn 0.35s ease;
}

.doc-section.active {
  display: block;
}

@keyframes docFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.doc-section-title {
  font-size: 1.75rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.doc-section-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: var(--space-2xl);
  max-width: 700px;
}

/* Method badges */
.method-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.method-badge.get {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald-glow);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.method-badge.post {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-indigo-glow);
  border: 1px solid rgba(99, 102, 241, 0.25);
}

.method-badge.put {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber-glow);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.method-badge.delete {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

/* Endpoint display */
.endpoint-display {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2xl);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.endpoint-path {
  color: var(--text-primary);
}

/* Doc headings */
.doc-heading {
  font-size: 1.2rem;
  font-weight: var(--font-weight-semibold);
  margin: var(--space-2xl) 0 var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.doc-heading:first-of-type {
  margin-top: 0;
}

.doc-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.doc-text code {
  padding: 2px 6px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-indigo-glow);
}

/* Inline alert/info boxes */
.doc-info-box {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-left: 3px solid var(--accent-indigo);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.doc-info-box.warning {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.2);
  border-left-color: var(--accent-amber);
}

.doc-info-box.success {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.2);
  border-left-color: var(--accent-emerald);
}

.doc-info-box .info-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 2px;
}

/* Parameter tables */
.param-table-wrapper {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-2xl);
}

.param-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.param-table thead {
  background: var(--bg-tertiary);
}

.param-table th {
  padding: var(--space-sm) var(--space-lg);
  text-align: left;
  font-weight: var(--font-weight-semibold);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  border-bottom: 1px solid var(--border-subtle);
}

.param-table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid rgba(99, 102, 241, 0.08);
  vertical-align: top;
}

.param-table tr:last-child td {
  border-bottom: none;
}

.param-table tbody tr {
  transition: background var(--transition-fast);
}

.param-table tbody tr:hover {
  background: var(--accent-indigo-soft);
}

.param-name {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-indigo-glow);
  font-weight: var(--font-weight-medium);
}

.param-type {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-emerald-glow);
  background: var(--accent-emerald-muted);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.param-required {
  font-size: 0.7rem;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  color: #f87171;
}

.param-optional {
  font-size: 0.7rem;
  color: var(--text-tertiary);
}

.param-desc {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Status codes table */
.status-code {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-weight: var(--font-weight-semibold);
  font-size: 0.82rem;
}

.status-code.success { color: var(--accent-emerald-glow); }
.status-code.redirect { color: var(--accent-amber-glow); }
.status-code.client-error { color: #f87171; }
.status-code.server-error { color: #f472b6; }

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.success { background: var(--accent-emerald); }
.status-dot.redirect { background: var(--accent-amber); }
.status-dot.client-error { background: #ef4444; }
.status-dot.server-error { background: #ec4899; }

/* Auth method cards */
.auth-methods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.auth-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.auth-card:hover {
  border-color: var(--border-medium);
  box-shadow: var(--shadow-glow-indigo);
}

.auth-card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--accent-indigo-muted);
  color: var(--accent-indigo-glow);
  margin-bottom: var(--space-md);
}

.auth-card h4 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.auth-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.auth-card .auth-example {
  margin-top: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-emerald-glow);
  overflow-x: auto;
}

/* --- Right Code Panel --- */
.devhub-code-panel {
  position: sticky;
  top: 72px;
  height: calc(100vh - 72px);
  overflow-y: auto;
  background: #0d0d14;
  border-left: 1px solid var(--border-subtle);
  padding: var(--space-lg);
  scrollbar-width: thin;
  scrollbar-color: var(--accent-indigo-muted) transparent;
}

.devhub-code-panel::-webkit-scrollbar {
  width: 4px;
}

.devhub-code-panel::-webkit-scrollbar-thumb {
  background: var(--accent-indigo-muted);
  border-radius: var(--radius-full);
}

.code-panel-section {
  display: none;
  animation: docFadeIn 0.35s ease;
}

.code-panel-section.active {
  display: block;
}

.code-panel-title {
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-md);
}

/* Language tabs in code panel */
.code-lang-tabs {
  display: flex;
  gap: 2px;
  background: rgba(26, 26, 46, 0.7);
  padding: 3px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  border: 1px solid var(--border-subtle);
}

.code-lang-tab {
  padding: 5px 12px;
  font-size: 0.72rem;
  font-weight: var(--font-weight-medium);
  color: var(--text-tertiary);
  border-radius: 4px;
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
}

.code-lang-tab:hover {
  color: var(--text-secondary);
}

.code-lang-tab.active {
  background: var(--accent-indigo);
  color: white;
}

/* Code example blocks in panel */
.code-example-block {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  overflow: hidden;
}

.code-example-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.code-example-label {
  font-size: 0.72rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.code-copy-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  font-size: 0.7rem;
  color: var(--text-tertiary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.code-copy-btn:hover {
  background: var(--accent-indigo-muted);
  color: var(--accent-indigo-glow);
}

.code-copy-btn.copied {
  color: var(--accent-emerald-glow);
}

.code-example-body {
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.75;
  overflow-x: auto;
  white-space: pre;
  color: var(--text-secondary);
}

.code-example-body .code-tab-content {
  display: none;
}

.code-example-body .code-tab-content.active {
  display: block;
}

/* Syntax colors */
.syn-keyword { color: var(--accent-indigo-glow); }
.syn-string { color: var(--accent-emerald-glow); }
.syn-function { color: var(--accent-amber-glow); }
.syn-comment { color: var(--text-tertiary); font-style: italic; }
.syn-number { color: #f472b6; }
.syn-property { color: #7dd3fc; }
.syn-operator { color: var(--text-tertiary); }
.syn-url { color: var(--accent-emerald-glow); text-decoration: underline; }

/* Response block */
.response-block {
  margin-top: var(--space-md);
}

.response-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  margin-bottom: var(--space-sm);
}

.response-status.ok {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald-glow);
}

.response-status.error {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

/* --- API Tester Panel --- */
.api-tester-section {
  padding: var(--space-4xl) 0;
  background: var(--bg-secondary);
  position: relative;
}

.api-tester-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.api-tester-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.tester-panel {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.tester-panel-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-xl);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-subtle);
}

.tester-panel-header h4 {
  font-size: 0.85rem;
  font-weight: var(--font-weight-semibold);
}

.tester-panel-header .live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  animation: pulse-dot 2s ease-in-out infinite;
}

.tester-body {
  padding: var(--space-xl);
}

.tester-field {
  margin-bottom: var(--space-lg);
}

.tester-field label {
  display: block;
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.tester-field select,
.tester-field input {
  width: 100%;
  padding: 0.6rem 0.85rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.tester-field select:focus,
.tester-field input:focus {
  border-color: var(--accent-indigo);
  box-shadow: 0 0 0 3px var(--accent-indigo-muted);
}

.tester-field select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='%2364748b'%3E%3Cpath d='M2 4L6 8L10 4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

.tester-endpoint-row {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.tester-endpoint-method {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  color: var(--accent-emerald-glow);
  flex-shrink: 0;
}

.tester-endpoint-path {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.tester-params {
  margin-bottom: var(--space-lg);
}

.tester-param-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.tester-param-row input {
  padding: 0.45rem 0.65rem;
  font-size: 0.8rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

.tester-remove-param {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
  cursor: pointer;
  align-self: center;
}

.tester-remove-param:hover {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

.tester-add-param {
  font-size: 0.78rem;
  color: var(--accent-indigo-glow);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: var(--space-lg);
}

.tester-add-param:hover {
  color: var(--accent-indigo);
}

.send-request-btn {
  width: 100%;
  padding: 0.7rem;
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-indigo-deep));
  color: white;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  font-size: 0.88rem;
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

.send-request-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

.send-request-btn.loading {
  opacity: 0.7;
  pointer-events: none;
}

/* Response panel */
.tester-response {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.tester-response-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.tester-response-status {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8rem;
}

.tester-response-time {
  font-size: 0.72rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.tester-response-body {
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.75;
  max-height: 400px;
  overflow-y: auto;
  white-space: pre;
  color: var(--text-secondary);
}

.tester-response-body .empty-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
  color: var(--text-tertiary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
}

.tester-response-body .empty-state svg {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-md);
  color: var(--text-tertiary);
  opacity: 0.5;
}

/* --- SDK Section --- */
.sdk-section {
  padding: var(--space-4xl) 0;
  background: var(--bg-primary);
  position: relative;
}

.sdk-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.sdk-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.sdk-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.sdk-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, var(--accent-indigo-muted) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.sdk-card:hover {
  border-color: var(--border-medium);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow-indigo);
}

.sdk-card:hover::before {
  opacity: 1;
}

.sdk-card-content {
  position: relative;
  z-index: 2;
}

.sdk-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  border-radius: var(--radius-lg);
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
}

.sdk-icon.python {
  background: rgba(55, 118, 171, 0.15);
  color: #3776AB;
}

.sdk-icon.node {
  background: rgba(104, 159, 56, 0.15);
  color: #689F38;
}

.sdk-icon.go {
  background: rgba(0, 173, 216, 0.15);
  color: #00ADD8;
}

.sdk-icon.php {
  background: rgba(119, 123, 180, 0.15);
  color: #777BB4;
}

.sdk-card h4 {
  font-size: 0.95rem;
  margin-bottom: var(--space-xs);
}

.sdk-card .sdk-version {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  margin-bottom: var(--space-md);
}

.sdk-card .sdk-install {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--accent-emerald-glow);
  margin-bottom: var(--space-md);
  overflow-x: auto;
  white-space: nowrap;
}

.sdk-download-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 16px;
  border: 1px solid var(--accent-indigo);
  border-radius: var(--radius-md);
  color: var(--accent-indigo-glow);
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.sdk-download-btn:hover {
  background: var(--accent-indigo);
  color: white;
}

/* --- Mobile Sidebar Toggle --- */
.sidebar-mobile-toggle {
  display: none;
  position: fixed;
  bottom: var(--space-xl);
  left: var(--space-xl);
  z-index: var(--z-overlay);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-indigo);
  color: white;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.5);
  cursor: pointer;
  transition: all var(--transition-base);
}

.sidebar-mobile-toggle:hover {
  transform: scale(1.1);
}

/* Mobile overlay for sidebar */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 9;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.sidebar-overlay.active {
  opacity: 1;
}

/* --- Responsive --- */
@media (max-width: 1200px) {
  .devhub-layout {
    grid-template-columns: 240px 1fr;
  }

  .devhub-code-panel {
    display: none;
  }

  /* Show inline code blocks in center column on tablet */
  .inline-code-fallback {
    display: block !important;
    margin-top: var(--space-2xl);
  }
}

@media (max-width: 900px) {
  .devhub-layout {
    grid-template-columns: 1fr;
  }

  .devhub-sidebar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    z-index: var(--z-overlay);
    padding-top: var(--space-xl);
  }

  .devhub-sidebar.mobile-open {
    display: block;
  }

  .sidebar-overlay {
    display: block;
  }

  .sidebar-mobile-toggle {
    display: flex;
  }

  .devhub-content {
    padding: var(--space-xl) var(--space-lg);
  }

  .auth-methods {
    grid-template-columns: 1fr;
  }

  .api-tester-grid {
    grid-template-columns: 1fr;
  }

  .sdk-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .devhub-hero h1 {
    font-size: 1.6rem;
  }

  .devhub-hero .base-url-display {
    font-size: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
  }

  .sdk-grid {
    grid-template-columns: 1fr;
  }

  .endpoint-display {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .param-table-wrapper {
    overflow-x: auto;
  }

  .param-table {
    min-width: 500px;
  }

  .devhub-content {
    padding: var(--space-md);
  }
}

/* --- Devhub-specific footer override --- */
.devhub-page .footer-glass {
  margin-top: 0;
}

@media (max-width: 480px) {
    .sdk-grid { grid-template-columns: 1fr; }
    .tester-param-row { grid-template-columns: 1fr; }
    .auth-methods { grid-template-columns: 1fr; }
}