:root {
  --bg-main: #0b0f19;
  --bg-card: rgba(18, 24, 38, 0.85);
  --bg-card-hover: rgba(24, 32, 52, 0.95);
  --bg-inner: #0f172a;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #38bdf8;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-glow: rgba(59, 130, 246, 0.25);
  
  --success: #10b981;
  --success-hover: #059669;
  --success-glow: rgba(16, 185, 129, 0.25);
  
  --warning: #f59e0b;
  --warning-hover: #d97706;
  
  --danger: #ef4444;
  --purple: #8b5cf6;
  --purple-hover: #7c3aed;
  
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: radial-gradient(circle at 15% 15%, #1e1b4b 0%, #0b0f19 50%, #050811 100%);
  color: var(--text-main);
  min-height: 100vh;
  padding: 2rem 1.5rem;
  line-height: 1.5;
}

.app-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Header */
.studio-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem 0;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon {
  font-size: 2.2rem;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
}

.studio-header h1 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.env-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.8rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.env-badge code {
  color: #38bdf8;
  font-family: var(--font-mono);
  font-weight: 600;
}

.dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success);
}

/* Architecture Topology Bar */
.topology-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
}

.topology-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  font-weight: 700;
  margin-bottom: 1rem;
}

.topology-nodes {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.node-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-inner);
  border: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  flex: 1;
  min-width: 220px;
}

.client-node {
  border-left: 4px solid var(--primary);
}

.backend-node.be-na {
  border-left: 4px solid var(--success);
}

.backend-node.be-eu {
  border-left: 4px solid var(--purple);
}

.node-icon {
  font-size: 1.5rem;
}

.node-meta {
  display: flex;
  flex-direction: column;
}

.node-role {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  font-weight: 600;
}

.node-meta strong {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-main);
}

.node-port {
  font-size: 0.75rem;
  color: #38bdf8;
  font-family: var(--font-mono);
}

.topology-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 0.5rem;
}

.arrow-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}

.arrow-line {
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--success));
  position: relative;
}

.arrow-line::after {
  content: '';
  position: absolute;
  right: 0;
  top: -3px;
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 6px solid var(--success);
}

/* Main Grid */
.workbench-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.5rem;
}

@media (max-width: 960px) {
  .workbench-grid {
    grid-template-columns: 1fr;
  }
}

/* Card Base */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.card-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #f8fafc;
}

.tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

/* Form Elements */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group.sm {
  gap: 0.25rem;
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-main);
}

.form-label.sm {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.label-hint {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.form-control {
  background: var(--bg-inner);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  transition: all 0.2s ease;
  width: 100%;
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.form-control.sm {
  padding: 0.45rem 0.65rem;
  font-size: 0.82rem;
}

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

.input-group-row {
  display: flex;
  gap: 0.5rem;
}

.input-tip {
  font-size: 0.72rem;
  color: var(--text-dim);
  line-height: 1.3;
  margin-top: 0.2rem;
}

.input-tip code {
  color: #38bdf8;
  font-family: var(--font-mono);
}

/* Preset Buttons */
.preset-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 0.4rem;
}

.preset-label {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.preset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.btn-preset {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.78rem;
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-preset:hover {
  background: rgba(59, 130, 246, 0.2);
  color: var(--text-main);
  border-color: var(--primary);
}

.btn-preset.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.btn-preset-local {
  color: #94a3b8;
  border-style: dashed;
}

/* Accordion Section */
.accordion-section {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.5);
  overflow: hidden;
}

.accordion-summary {
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  color: var(--text-muted);
  background: rgba(15, 23, 42, 0.7);
}

.accordion-summary:hover {
  color: var(--text-main);
}

.summary-badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 9999px;
  color: var(--text-dim);
}

.accordion-content {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  border-top: 1px solid var(--border-color);
}

.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 0.75rem;
}

.grid-3col {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 0.75rem;
}

.checkbox-stack {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-top: 0.2rem;
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--primary);
  width: 14px;
  height: 14px;
}

/* Action Buttons */
.actions-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.primary-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-lg {
  padding: 0.85rem 1.25rem;
  font-size: 0.95rem;
}

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.8rem;
}

.btn-icon {
  font-size: 1.25rem;
}

.btn-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.btn-text small {
  font-size: 0.72rem;
  opacity: 0.85;
  font-weight: 400;
  font-family: var(--font-mono);
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-success {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--success-glow);
}

.btn-success:hover {
  background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

.btn-secondary:hover {
  background: rgba(51, 65, 85, 0.9);
  color: var(--text-main);
}

.btn-warning {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #fbbf24;
}

.btn-warning:hover {
  background: rgba(245, 158, 11, 0.25);
  color: #ffffff;
}

.btn-purple {
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: #c4b5fd;
}

.btn-purple:hover {
  background: rgba(139, 92, 246, 0.25);
  color: #ffffff;
}

.secondary-buttons {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem;
}

/* Results Card */
.header-status-pills {
  display: flex;
  gap: 0.5rem;
}

.status-pill {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  border: 1px solid transparent;
}

.status-idle {
  background: rgba(100, 116, 139, 0.2);
  color: #94a3b8;
  border-color: rgba(100, 116, 139, 0.3);
}

.status-ok {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.4);
}

.status-error {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.4);
}

.status-loading {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  border-color: rgba(59, 130, 246, 0.4);
}

.status-neutral {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

/* Summary Grid */
.response-summary-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr 0.7fr;
  gap: 0.75rem;
}

.summary-metric {
  background: var(--bg-inner);
  border: 1px solid var(--border-color);
  padding: 0.75rem;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.metric-label {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  font-weight: 600;
}

.metric-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.metric-value.highlight {
  color: #38bdf8;
}

/* Request Details Box */
.request-details-box {
  background: var(--bg-inner);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.8rem;
}

.req-detail-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.detail-label {
  color: var(--text-dim);
  min-width: 120px;
  font-weight: 500;
}

.detail-val {
  color: var(--text-muted);
  word-break: break-all;
}

.highlight-tag {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-sm);
}

.diagnosis-text {
  color: #fcd34d;
}

/* JSON Viewer */
.json-viewer-container {
  background: #060911;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.json-viewer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.45rem 0.85rem;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 600;
}

.btn-copy {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

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

.json-code {
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.5;
  color: #e2e8f0;
  overflow-x: auto;
  max-height: 280px;
}

/* Log Table */
.log-table-container {
  overflow-x: auto;
}

.log-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  text-align: left;
}

.log-table th {
  background: var(--bg-inner);
  color: var(--text-dim);
  font-weight: 600;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

.log-table td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-muted);
}

.log-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.empty-row td {
  text-align: center;
  padding: 2rem;
  color: var(--text-dim);
}

.log-action-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

.action-set {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
}

.action-get {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
}

.action-clear {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
}

/* Guide Grid */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.guide-box {
  background: var(--bg-inner);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.guide-icon {
  font-size: 1.5rem;
}

.guide-box h3 {
  font-size: 0.95rem;
  color: #f1f5f9;
  font-weight: 700;
}

.guide-box p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.guide-box code {
  color: #38bdf8;
  font-family: var(--font-mono);
  background: rgba(56, 189, 248, 0.1);
  padding: 0.1rem 0.3rem;
  border-radius: var(--radius-sm);
}