/* ==========================================================================
   OASIS - Modern Web UI Design System
   ========================================================================== */

/* Default & Dark Theme (Lighter, soft dark mode) */
:root, [data-theme="dark"] {
  /* Color Tokens */
  --bg-dark: #1e293b;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #334155;
  --bg-glass: rgba(15, 23, 42, 0.85);
  --border-color: rgba(255, 255, 255, 0.12);
  --border-focus: #38bdf8;
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  --accent-cyan: #38bdf8;
  --accent-cyan-glow: rgba(56, 189, 248, 0.25);
  --accent-purple: #c084fc;
  
  /* HTTP Method Colors */
  --method-get-color: #38bdf8;
  --method-get-bg: rgba(56, 189, 248, 0.15);
  --method-get-border: rgba(56, 189, 248, 0.35);

  --method-post-color: #34d399;
  --method-post-bg: rgba(52, 211, 153, 0.15);
  --method-post-border: rgba(52, 211, 153, 0.35);

  --method-put-color: #fbbf24;
  --method-put-bg: rgba(251, 191, 36, 0.15);
  --method-put-border: rgba(251, 191, 36, 0.35);

  --method-delete-color: #f87171;
  --method-delete-bg: rgba(248, 113, 113, 0.15);
  --method-delete-border: rgba(248, 113, 113, 0.35);

  --method-patch-color: #c084fc;
  --method-patch-bg: rgba(192, 132, 252, 0.15);
  --method-patch-border: rgba(192, 132, 252, 0.35);

  --code-bg: #020617;
  --json-key: #818cf8;
  --json-string: #34d399;
  --json-number: #fbbf24;
  --json-boolean: #f43f5e;
  --json-null: #9ca3af;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'Fira Code', monospace;

  --transition-fast: 0.18s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme */
[data-theme="light"] {
  --bg-dark: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.9);
  --border-color: #cbd5e1;
  --border-focus: #0284c7;
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;

  --accent-cyan: #0284c7;
  --accent-cyan-glow: rgba(2, 132, 199, 0.2);
  --accent-purple: #7e22ce;

  /* HTTP Method Colors for Light Theme */
  --method-get-color: #0369a1;
  --method-get-bg: #e0f2fe;
  --method-get-border: #7dd3fc;

  --method-post-color: #15803d;
  --method-post-bg: #dcfce7;
  --method-post-border: #86efac;

  --method-put-color: #b45309;
  --method-put-bg: #fef3c7;
  --method-put-border: #fde047;

  --method-delete-color: #b91c1c;
  --method-delete-bg: #fee2e2;
  --method-delete-border: #fca5a5;

  --method-patch-color: #6b21a8;
  --method-patch-bg: #f3e8ff;
  --method-patch-border: #d8b4fe;

  --code-bg: #f1f5f9;
  --json-key: #4338ca;
  --json-string: #047857;
  --json-number: #d97706;
  --json-boolean: #be123c;
  --json-null: #64748b;
}

/* Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 14px;
  overflow: hidden;
  height: 100vh;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

/* App Header */
.app-header {
  height: 62px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  gap: 20px;
  z-index: 100;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  width: 280px;
}

.logo-icon {
  font-size: 24px;
  line-height: 1;
  filter: drop-shadow(0 0 8px var(--accent-cyan-glow));
}

.brand-text h1 {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 1px;
  background: linear-gradient(135deg, #38bdf8 0%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.version-tag {
  font-size: 10px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  display: block;
  margin-top: -2px;
}

/* Spec Bar */
.spec-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  max-width: none;
  width: 100%;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0 12px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-wrapper:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-cyan-glow);
}

.search-icon {
  color: var(--text-muted);
  margin-right: 8px;
  flex-shrink: 0;
}

.input-wrapper input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 13px;
  height: 38px;
  outline: none;
  font-family: var(--font-mono);
}

.input-wrapper select {
  background: var(--bg-surface-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  font-size: 12px;
  outline: none;
  cursor: pointer;
  margin-left: 8px;
}

/* URL History Dropdown */
.url-history-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  z-index: 300;
  overflow: hidden;
  max-height: 280px;
  display: flex;
  flex-direction: column;
}

.history-dropdown-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-color);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.02);
}

.btn-text-link {
  background: transparent;
  border: none;
  color: var(--accent-cyan);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

.btn-text-link:hover {
  text-decoration: underline;
}

.history-list {
  overflow-y: auto;
  max-height: 230px;
}

.history-empty-item {
  padding: 14px 12px;
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
}

.history-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  cursor: pointer;
  transition: background var(--transition-fast);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.history-item:last-child {
  border-bottom: none;
}

.history-item:hover {
  background: rgba(255, 255, 255, 0.06);
}

.history-icon {
  color: var(--text-muted);
  flex-shrink: 0;
}

.history-url-text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.btn-remove-history {
  font-size: 11px;
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: 4px;
  opacity: 0.6;
}

.history-item:hover .btn-remove-history {
  opacity: 1;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 38px;
  padding: 0 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), #0284c7);
  color: #fff;
  box-shadow: 0 2px 10px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-surface-elevated);
  filter: brightness(1.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-icon-only {
  width: 38px;
  height: 38px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-run {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #fff;
  font-size: 14px;
  padding: 0 24px;
  height: 42px;
  box-shadow: 0 2px 12px rgba(16, 185, 129, 0.3);
}

.btn-run:hover {
  filter: brightness(1.15);
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.45);
}

.btn-sm {
  height: 28px;
  padding: 0 10px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  line-height: 1;
}

.btn-icon:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

.mode-badge {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 10px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.mode-badge.direct {
  background: rgba(56, 189, 248, 0.2);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.4);
}

.mode-badge.proxy {
  background: rgba(168, 85, 247, 0.2);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.4);
}

/* Workspace Layout */
.workspace {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 320px;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

/* Sidebar Resizer Handle */
.sidebar-resizer {
  width: 6px;
  background: transparent;
  cursor: col-resize;
  position: relative;
  z-index: 10;
  flex-shrink: 0;
  transition: background var(--transition-fast);
  user-select: none;
  -webkit-user-select: none;
}

.sidebar-resizer:hover,
.sidebar-resizer.is-dragging {
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan-glow);
}

.sidebar-resizer::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 2px;
  height: 24px;
  background: var(--border-color);
  border-radius: 1px;
  transition: background var(--transition-fast);
}

.sidebar-resizer:hover::after,
.sidebar-resizer.is-dragging::after {
  background: #ffffff;
}

.sidebar-header {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-color);
}

.filter-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0 8px;
}

.filter-input-wrapper input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 12px;
  height: 30px;
  outline: none;
}

.op-stats {
  margin-top: 8px;
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

.spec-meta-card {
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-color);
}

.spec-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}

.spec-version {
  font-size: 11px;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

.spec-desc-text {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.nav-menu {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.sidebar-placeholder {
  padding: 30px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
}

.placeholder-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

/* Sidebar Footer Link to Codeberg Repo */
.sidebar-footer {
  padding: 10px 12px !important;
  border-top: 1px solid var(--border-color) !important;
  background: var(--bg-surface) !important;
  flex-shrink: 0 !important;
  box-sizing: border-box !important;
  width: 100% !important;
}

.sidebar-repo-link,
.sidebar-repo-link:link,
.sidebar-repo-link:visited,
.sidebar-repo-link:active {
  display: flex !important;
  align-items: center !important;
  gap: 8px !important;
  font-size: 12px !important;
  font-weight: 600 !important;
  color: var(--text-secondary) !important;
  text-decoration: none !important;
  padding: 8px 10px !important;
  border-radius: var(--radius-sm) !important;
  background: rgba(255, 255, 255, 0.04) !important;
  border: 1px solid var(--border-color) !important;
  transition: all var(--transition-fast) !important;
  box-sizing: border-box !important;
  width: 100% !important;
  cursor: pointer !important;
}

.sidebar-repo-link:hover {
  color: var(--accent-cyan) !important;
  background: rgba(56, 189, 248, 0.12) !important;
  border-color: var(--accent-cyan) !important;
  box-shadow: 0 0 10px var(--accent-cyan-glow) !important;
}

.sidebar-repo-link svg {
  display: inline-block !important;
  vertical-align: middle !important;
  flex-shrink: 0 !important;
}

.sidebar-repo-link .codeberg-icon {
  color: var(--accent-cyan) !important;
  fill: currentColor !important;
}

.sidebar-repo-link span {
  flex: 1 !important;
  white-space: nowrap !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
}

.sidebar-repo-link .external-icon {
  opacity: 0.6 !important;
  stroke: currentColor !important;
}

.sidebar-repo-link:hover .external-icon {
  opacity: 1 !important;
}

/* Light Mode Overrides for Sidebar Footer */
body.light-mode .sidebar-footer {
  background: var(--bg-surface) !important;
  border-top-color: var(--border-color) !important;
}

body.light-mode .sidebar-repo-link,
body.light-mode .sidebar-repo-link:link,
body.light-mode .sidebar-repo-link:visited {
  background: rgba(0, 0, 0, 0.04) !important;
  border-color: var(--border-color) !important;
  color: var(--text-secondary) !important;
}

body.light-mode .sidebar-repo-link:hover {
  background: rgba(2, 132, 199, 0.08) !important;
  border-color: #0284c7 !important;
  color: #0284c7 !important;
}

/* Accordion Tag Groups in Sidebar */
.tag-group {
  margin-bottom: 4px;
}

.tag-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
}

.tag-header:hover {
  background: rgba(255, 255, 255, 0.04);
}

.tag-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
}

.tag-badge {
  font-size: 10px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  padding: 1px 6px;
  border-radius: 10px;
}

.tag-arrow {
  font-size: 10px;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.tag-group.collapsed .tag-arrow {
  transform: rotate(-90deg);
}

.tag-group.collapsed .op-list {
  display: none;
}

.op-list {
  display: flex;
  flex-direction: column;
}

.op-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 24px;
  cursor: pointer;
  transition: background var(--transition-fast);
  border-left: 3px solid transparent;
}

.op-item:hover {
  background: rgba(255, 255, 255, 0.04);
}

.op-item.active {
  background: rgba(6, 182, 212, 0.08);
  border-left-color: var(--accent-cyan);
}

.op-item .method-badge {
  flex-shrink: 0;
}

.op-item-path {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.op-item-summary {
  font-size: 11px;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* HTTP Method Badges */
.method-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: inline-block;
  text-align: center;
  min-width: 48px;
}

.method-badge.get {
  color: var(--method-get-color);
  background: var(--method-get-bg);
  border: 1px solid var(--method-get-border);
}

.method-badge.post {
  color: var(--method-post-color);
  background: var(--method-post-bg);
  border: 1px solid var(--method-post-border);
}

.method-badge.put {
  color: var(--method-put-color);
  background: var(--method-put-bg);
  border: 1px solid var(--method-put-border);
}

.method-badge.delete {
  color: var(--method-delete-color);
  background: var(--method-delete-bg);
  border: 1px solid var(--method-delete-border);
}

.method-badge.patch {
  color: var(--method-patch-color);
  background: var(--method-patch-bg);
  border: 1px solid var(--method-patch-border);
}

/* Main Panel */
.main-panel {
  flex: 1;
  background: var(--bg-dark);
  overflow-y: auto;
  position: relative;
}

/* Welcome View */
.welcome-view {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  min-height: 100%;
}

.welcome-card {
  max-width: 800px;
  width: 100%;
  text-align: center;
}

.hero-icon {
  font-size: 56px;
  margin-bottom: 12px;
}

.welcome-card h2 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 6px;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 30px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 30px;
  text-align: left;
}

.feature-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
}

.feat-icon {
  font-size: 22px;
  margin-bottom: 8px;
}

.feature-item h4 {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 4px;
}

.feature-item p {
  font-size: 11px;
  color: var(--text-muted);
}

.quick-start-section {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: left;
}

.quick-start-section h3 {
  font-size: 14px;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.raw-spec-box textarea {
  width: 100%;
  height: 140px;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  outline: none;
  resize: vertical;
}

.raw-spec-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 10px;
}

/* Tester Workspace */
.tester-workspace {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.op-header-bar {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 18px 24px;
}

.op-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.op-path {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.deprecated-badge {
  font-size: 11px;
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.4);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
}

.op-summary {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.op-description {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

.server-picker-row {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
}

.server-select, .custom-server-input {
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  outline: none;
}

.server-select {
  max-width: 450px;
  flex: 1;
}

/* Request Builder Panel */
.request-builder-panel {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

/* Parameters Form */
.param-group {
  margin-bottom: 20px;
}

.param-group-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent-cyan);
  margin-bottom: 8px;
  font-weight: 700;
}

.param-table {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.param-row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
}

.param-meta {
  width: 200px;
  flex-shrink: 0;
}

.param-name {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.param-req {
  color: #f87171;
  font-weight: 700;
  margin-left: 2px;
}

.param-type {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.param-desc {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.param-input-wrapper {
  flex: 1;
}

.param-input {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  outline: none;
}

.param-input:focus {
  border-color: var(--border-focus);
}

/* Request Body Section */
.body-container {
  margin-top: 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
}

.body-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.content-type-picker label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-right: 6px;
}

.content-type-picker select {
  background: var(--bg-dark);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  font-size: 12px;
  outline: none;
}

.body-editor-toolbar {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.code-editor {
  width: 100%;
  height: 160px;
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  outline: none;
  resize: vertical;
}

/* cURL Live Preview */
.live-request-preview {
  margin-top: 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 16px;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.preview-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.curl-code-block {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--json-string);
  background: var(--code-bg);
  padding: 10px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Action Bar */
.action-bar {
  margin-top: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.shortcut-key {
  font-family: var(--font-mono);
  font-size: 10px;
  background: rgba(0, 0, 0, 0.3);
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
}

.spinner {
  width: 22px;
  height: 22px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Response Panel */
.response-panel {
  padding: 20px 24px;
}

.response-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.response-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-badge {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
}

.status-badge.status-2xx {
  background: rgba(52, 211, 153, 0.2);
  color: #34d399;
  border: 1px solid rgba(52, 211, 153, 0.4);
}

.status-badge.status-3xx {
  background: rgba(56, 189, 248, 0.2);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.4);
}

.status-badge.status-4xx {
  background: rgba(251, 191, 36, 0.2);
  color: #fbbf24;
  border: 1px solid rgba(251, 191, 36, 0.4);
}

.status-badge.status-5xx {
  background: rgba(248, 113, 113, 0.2);
  color: #f87171;
  border: 1px solid rgba(248, 113, 113, 0.4);
}

.meta-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-surface);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.response-placeholder {
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
  background: var(--bg-surface);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
}

/* Response Tabs */
.tabs-nav {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 12px;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.response-toolbar {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.code-viewer {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--code-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  overflow-x: auto;
  max-height: 450px;
  line-height: 1.6;
}

/* Syntax Highlighting for Response Viewer */
.json-key { color: var(--json-key); font-weight: 600; }
.json-string { color: var(--json-string); }
.json-number { color: var(--json-number); }
.json-boolean { color: var(--json-boolean); font-weight: 600; }
.json-null { color: var(--json-null); font-style: italic; }

/* Data Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.data-table th, .data-table td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 10px;
}

.data-table td {
  font-family: var(--font-mono);
}

/* In-Page Collapsible Global Settings Bar */
.global-settings-bar {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.settings-bar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 24px;
  cursor: pointer;
  user-select: none;
  background: var(--bg-surface);
  transition: background var(--transition-fast);
}

.settings-bar-header:hover {
  background: var(--bg-surface-elevated);
}

.settings-bar-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}

.header-count-badge {
  font-size: 11px;
  font-family: var(--font-mono);
  background: var(--bg-dark);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 2px 8px;
  border-radius: 12px;
}

.settings-bar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.settings-arrow {
  font-size: 10px;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.global-settings-bar.collapsed .settings-arrow {
  transform: rotate(-90deg);
}

.settings-panel-content {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-dark);
}

.settings-row {
  display: flex;
  gap: 30px;
  flex-wrap: wrap;
}

.setting-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.headers-setting-col {
  flex: 1;
  min-width: 320px;
}

.mode-toggle-group {
  display: flex;
  gap: 8px;
}

.mode-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.mode-pill input[type="radio"]:checked + span {
  color: var(--accent-cyan);
}

.radio-desc {
  font-size: 11px;
  color: var(--text-muted);
  display: block;
  margin-top: 4px;
}

.header-setting-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.headers-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.header-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-row input {
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 6px 10px;
  font-size: 12px;
  font-family: var(--font-mono);
  outline: none;
}

.header-row input.header-key { flex: 2; }
.header-row input.header-val { flex: 3; }

.dialog-footer {
  padding: 16px 22px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-focus);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  z-index: 1000;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}

/* Utility classes */
.hidden { display: none !important; }

/* Mobile Navigation & Fly-out Sidebar Controls */
.btn-menu-toggle {
  display: none;
}

.btn-close-sidebar {
  display: none;
}

.sidebar-backdrop {
  display: none;
}

.sidebar-brand-row {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-brand-row .brand {
  width: auto;
}

.sidebar-brand-row .brand-text h2 {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 1px;
  background: linear-gradient(135deg, #38bdf8 0%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sidebar-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sidebar-header-top {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.sidebar-header-top .filter-input-wrapper {
  flex: 1;
}

/* ==========================================================================
   Responsive & Mobile Design System
   ========================================================================== */

@media (max-width: 768px) {
  /* Toggle buttons */
  .btn-menu-toggle {
    display: inline-flex;
  }

  .btn-close-sidebar {
    display: inline-flex;
    font-size: 16px;
    padding: 4px 8px;
  }

  .sidebar-resizer {
    display: none !important;
  }

  /* Hide app header brand & theme toggle on mobile */
  .app-header .brand {
    display: none !important;
  }

  #btnThemeToggle {
    display: none !important;
  }

  /* Show brand row inside sidebar fly-out on mobile */
  .sidebar-brand-row {
    display: flex !important;
  }

  /* Clear and Load buttons become icon-only on mobile */
  #btnClearAll span,
  #btnLoad span {
    display: none !important;
  }

  #btnClearAll,
  #btnLoad {
    padding: 0 10px !important;
    height: 38px !important;
    min-width: 38px !important;
    justify-content: center;
  }

  /* App Header - Single clean row on mobile */
  .app-header {
    height: 58px;
    padding: 0 10px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    flex-wrap: nowrap;
  }

  .spec-bar {
    width: auto;
    flex: 1;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    flex-wrap: nowrap;
  }

  .input-wrapper {
    flex: 1;
    min-width: 0;
    padding: 0 8px;
  }

  .input-wrapper input {
    height: 36px;
    font-size: 12px;
  }

  .input-wrapper select {
    max-width: 95px;
    font-size: 11px;
    padding: 2px 4px;
    margin-left: 4px;
  }

  .header-actions {
    width: auto;
    flex-shrink: 0;
    gap: 6px;
  }

  /* Workspace Layout & Fly-out Sidebar */
  .workspace {
    position: relative;
  }

  .sidebar-backdrop {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 190;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
  }

  .sidebar-backdrop.active {
    opacity: 1;
    pointer-events: auto;
  }

  .sidebar-backdrop.hidden {
    display: none;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 300px;
    max-width: 85vw;
    height: 100vh;
    height: 100dvh;
    z-index: 200;
    background: var(--bg-surface);
    box-shadow: 10px 0 30px rgba(0, 0, 0, 0.5);
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s;
    visibility: hidden;
  }

  .sidebar.open {
    transform: translateX(0);
    visibility: visible;
  }

  /* Main Panel Layout & Automatic Resizing */
  .main-panel {
    width: 100%;
  }

  /* Welcome View */
  .welcome-view {
    padding: 24px 14px;
  }

  .hero-icon {
    font-size: 42px;
  }

  .welcome-card h2 {
    font-size: 22px;
  }

  .hero-subtitle {
    font-size: 13px;
    margin-bottom: 20px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .quick-start-section {
    padding: 14px;
  }

  .raw-spec-box textarea {
    height: 110px;
  }

  /* Operation Header Bar */
  .op-header-bar {
    padding: 14px 16px;
  }

  .op-title-row {
    flex-wrap: wrap;
    gap: 8px;
  }

  .op-path {
    font-size: 15px;
    word-break: break-all;
  }

  .op-summary {
    font-size: 13px;
  }

  .op-description {
    font-size: 11px;
  }

  .server-picker-row {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .server-select {
    max-width: 100%;
    width: 100%;
  }

  /* Request Builder Panel */
  .request-builder-panel {
    padding: 14px 16px;
  }

  .param-row {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 10px;
  }

  .param-meta {
    width: 100%;
  }

  .param-input-wrapper {
    width: 100%;
  }

  .body-container {
    padding: 10px;
  }

  .body-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .body-editor-toolbar {
    flex-wrap: wrap;
  }

  .live-request-preview {
    padding: 10px;
  }

  .action-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-run {
    width: 100%;
    justify-content: center;
  }

  /* Response Panel */
  .response-panel {
    padding: 14px 16px;
  }

  .response-header-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .response-meta {
    flex-wrap: wrap;
    gap: 6px;
  }

  .tabs-nav {
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 2px;
  }

  .tab-btn {
    padding: 8px 12px;
    font-size: 12px;
    flex-shrink: 0;
  }

  .code-viewer {
    padding: 10px;
    font-size: 11px;
    max-height: 350px;
  }

  .sent-details-box {
    overflow-x: auto;
  }

  .data-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  /* Global Settings Bar */
  .settings-bar-header {
    padding: 10px 16px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .settings-bar-title {
    font-size: 12px;
    gap: 6px;
  }

  .settings-panel-content {
    padding: 12px 16px;
  }

  .settings-row {
    flex-direction: column;
    gap: 16px;
  }

  .headers-setting-col {
    min-width: 0;
    width: 100%;
  }

  .header-row {
    flex-wrap: wrap;
    gap: 6px;
  }

  .header-row input.header-key,
  .header-row input.header-val {
    flex: 1 1 100%;
  }
}

@media (max-width: 480px) {
  .app-header {
    padding: 0 8px;
    gap: 6px;
  }

  .input-wrapper select {
    max-width: 80px;
    font-size: 10px;
  }

  .btn {
    height: 34px;
    padding: 0 8px;
  }

  .toast {
    left: 12px;
    right: 12px;
    bottom: 12px;
    text-align: center;
  }
}