:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #162032;
  --bg-card-hover: #1e293b;
  --border-color: #2a374a;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.25);
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Header */
.app-header {
  background: linear-gradient(180deg, rgba(17, 24, 39, 0.95) 0%, rgba(10, 14, 23, 0.85) 100%);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.4);
}

.brand-titles h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, #f1f5f9, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-titles .subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.header-badges {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid transparent;
}

.badge-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.badge-green {
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.25);
}
.badge-green .badge-pulse { background: #34d399; }

.badge-cyan {
  background: rgba(6, 182, 212, 0.12);
  color: #38bdf8;
  border-color: rgba(6, 182, 212, 0.25);
}

.badge-amber {
  background: rgba(245, 158, 11, 0.12);
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.25);
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.7; }
}

/* Architecture Flow Banner */
.architecture-pipeline {
  max-width: 1400px;
  margin: 1.25rem auto 0;
  padding: 0 1.5rem;
}

.pipeline-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.15rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.pipeline-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-cyan);
  margin-bottom: 0.85rem;
  font-weight: 600;
}

.pipeline-nodes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
  align-items: center;
}

.node {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  position: relative;
  transition: all 0.2s ease;
  cursor: pointer;
}

.node:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px var(--accent-cyan-glow);
  transform: translateY(-2px);
}

.node-step {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-transform: uppercase;
}

.node-name {
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 0.15rem;
}

.node-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  font-family: var(--font-mono);
}

.node-arrow {
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--accent-cyan);
  font-size: 1.1rem;
}

/* Navigation Tabs */
.tabs-nav {
  max-width: 1400px;
  margin: 1.25rem auto 0;
  padding: 0 1.5rem;
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

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

.tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  background: linear-gradient(180deg, transparent 70%, rgba(6, 182, 212, 0.08) 100%);
}

/* Main Container */
.main-content {
  max-width: 1400px;
  margin: 1.5rem auto 3rem;
  padding: 0 1.5rem;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Chat & Playground Layout */
.playground-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 1.5rem;
}

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

.sidebar-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.panel-title {
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-main);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.form-select, .form-input, .form-textarea {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.85rem;
  padding: 0.6rem 0.85rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.form-select:focus, .form-input:focus, .form-textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 2px var(--accent-cyan-glow);
}

.pricing-preview {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.75rem;
  font-size: 0.76rem;
}

.pricing-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.25rem;
}

.pricing-row:last-child {
  margin-bottom: 0;
}

.meta-box {
  background: rgba(6, 182, 212, 0.05);
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: 8px;
  padding: 0.75rem;
  font-size: 0.75rem;
}

.meta-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.35rem;
}

.meta-item:last-child {
  margin-bottom: 0;
}

.meta-label {
  color: var(--text-muted);
}

.meta-val {
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  font-weight: 500;
}

/* Chat Window */
.chat-window {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  height: 680px;
  overflow: hidden;
}

.chat-header {
  padding: 1rem 1.25rem;
  background: rgba(17, 24, 39, 0.8);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-header-title {
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.chat-message {
  display: flex;
  flex-direction: column;
  max-width: 85%;
  animation: fadeIn 0.25s ease;
}

.message-user {
  align-self: flex-end;
}

.message-user .message-bubble {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: white;
  border-radius: 14px 14px 2px 14px;
}

.message-assistant {
  align-self: flex-start;
  width: 100%;
  max-width: 90%;
}

.message-assistant .message-bubble {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 14px 14px 14px 2px;
}

.message-bubble {
  padding: 0.9rem 1.15rem;
  font-size: 0.88rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.message-meta {
  margin-top: 0.4rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.verification-drawer {
  margin-top: 0.65rem;
  background: rgba(10, 14, 23, 0.65);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: 8px;
  padding: 0.65rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #cbd5e1;
}

.verification-title {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  color: #38bdf8;
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  font-size: 0.68rem;
  letter-spacing: 0.05em;
}

.chat-input-bar {
  padding: 1rem 1.25rem;
  background: rgba(17, 24, 39, 0.95);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.quick-prompts {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.quick-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  padding: 0.25rem 0.65rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.2s ease;
}

.quick-pill:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.input-row {
  display: flex;
  gap: 0.75rem;
}

.chat-input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-main);
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 0.88rem;
  outline: none;
}

.chat-input:focus {
  border-color: var(--accent-cyan);
}

.btn-primary {
  background: linear-gradient(135deg, #06b6d4 0%, #2563eb 100%);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 0 1.35rem;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: opacity 0.2s ease;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Usage & Billing View */
.billing-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
}

.stat-label {
  font-size: 0.76rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  margin-top: 0.35rem;
  color: var(--text-main);
  font-family: var(--font-mono);
}

.stat-sub {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.table-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.table-header-bar {
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.table-actions {
  display: flex;
  gap: 0.6rem;
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 8px;
  padding: 0.45rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

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

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

.usage-table th {
  background: rgba(10, 14, 23, 0.7);
  padding: 0.75rem 1rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
}

.usage-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(42, 55, 74, 0.4);
  font-family: var(--font-mono);
}

.usage-table tr:hover {
  background: rgba(30, 41, 59, 0.4);
}

.invoice-preview-card {
  background: var(--bg-secondary);
  border: 1px dashed var(--accent-cyan);
  border-radius: 14px;
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.invoice-header {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1rem;
}

/* Architecture & IaC Tab */
.docs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

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

.doc-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
}

.code-block {
  background: #060910;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #cbd5e1;
  margin-top: 0.75rem;
  line-height: 1.5;
  position: relative;
}

.copy-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.7rem;
  cursor: pointer;
}

.copy-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

/* Terminal Console */
.terminal-window {
  background: #05080e;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.terminal-header {
  background: #0e1420;
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
  display: flex;
  gap: 0.4rem;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-body {
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #10b981;
  min-height: 380px;
  max-height: 500px;
  overflow-y: auto;
  white-space: pre-wrap;
  line-height: 1.5;
}