:root {
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-card: rgba(17, 24, 39, 0.75);
  --border-color: rgba(255, 255, 255, 0.1);
  --nvidia-green: #76b900;
  --nvidia-glow: rgba(118, 185, 0, 0.35);
  --nebius-violet: #8b5cf6;
  --nebius-glow: rgba(139, 92, 246, 0.35);
  --tavily-blue: #38bdf8;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(118, 185, 0, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 25%, rgba(139, 92, 246, 0.08) 0%, transparent 40%);
  min-height: 100vh;
}

.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 40px;
}

/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 28px;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nvidia-badge, .nebius-badge, .tavily-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.3px;
}

.nvidia-badge {
  background: rgba(118, 185, 0, 0.15);
  color: #a3e635;
  border: 1px solid rgba(118, 185, 0, 0.3);
}

.nvidia-logo {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: #76b900;
  border-radius: 50%;
  box-shadow: 0 0 8px var(--nvidia-green);
}

.nebius-badge {
  background: rgba(139, 92, 246, 0.15);
  color: #c084fc;
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.tavily-badge {
  background: rgba(56, 189, 248, 0.15);
  color: #7dd3fc;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.plus-sign {
  color: var(--text-muted);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.system-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--nvidia-green);
  box-shadow: 0 0 10px var(--nvidia-green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(118, 185, 0, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(118, 185, 0, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(118, 185, 0, 0); }
}

.github-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  transition: all 0.2s;
}

.github-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
}

/* Hero Section */
.hero-section {
  text-align: center;
  margin-bottom: 28px;
}

.hero-tag {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 700;
  color: var(--nvidia-green);
  background: rgba(118, 185, 0, 0.1);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
  border: 1px solid rgba(118, 185, 0, 0.2);
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 12px;
}

.gradient-text {
  background: linear-gradient(135deg, #a3e635, #76b900 40%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 820px;
  margin: 0 auto;
}

/* Input Card */
.research-input-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 28px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

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

.input-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: var(--text-muted);
}

.depth-selector {
  display: flex;
  background: rgba(0, 0, 0, 0.3);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.depth-btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.depth-btn.active {
  background: var(--nvidia-green);
  color: #000;
}

.input-wrapper {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 14px;
}

textarea#queryInput {
  width: 100%;
  background: rgba(10, 15, 26, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.98rem;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s;
}

textarea#queryInput:focus {
  border-color: var(--nvidia-green);
  box-shadow: 0 0 0 2px var(--nvidia-glow);
}

.primary-launch-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, #76b900, #5a8e00);
  color: #000;
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(118, 185, 0, 0.4);
  transition: all 0.2s;
}

.primary-launch-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(118, 185, 0, 0.6);
}

.primary-launch-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Prompt suggestions */
.quick-prompts {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

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

.prompt-chip {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s;
}

.prompt-chip:hover {
  background: rgba(118, 185, 0, 0.15);
  color: #a3e635;
  border-color: rgba(118, 185, 0, 0.3);
}

/* Accordion */
.api-keys-accordion {
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
}

.accordion-summary {
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}

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

.keys-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 10px;
}

.key-field label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.key-field input {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  outline: none;
}

.key-field input:focus {
  border-color: var(--nebius-violet);
}

/* Pipeline Status & Stages */
.pipeline-section {
  margin-bottom: 28px;
}

.pipeline-stages {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 16px;
}

.stage-step {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  transition: all 0.3s;
}

.stage-step.active {
  border-color: var(--nvidia-green);
  box-shadow: 0 0 16px var(--nvidia-glow);
}

.stage-step.completed {
  border-color: rgba(118, 185, 0, 0.4);
  background: rgba(118, 185, 0, 0.05);
}

.step-indicator {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.stage-step.active .step-indicator {
  background: var(--nvidia-green);
  color: #000;
}

.stage-step.completed .step-indicator {
  background: #22c55e;
  color: #fff;
}

.step-meta {
  flex: 1;
}

.step-title {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}

.step-model {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.step-badge {
  font-size: 0.68rem;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 4px;
}

.step-badge.pending {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

.step-badge.running {
  background: rgba(118, 185, 0, 0.2);
  color: #a3e635;
  animation: pulse 1.5s infinite;
}

.step-badge.done {
  background: rgba(34, 197, 94, 0.2);
  color: #4ade80;
}

/* Telemetry Bar */
.telemetry-bar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.telemetry-card {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  text-align: center;
}

.telemetry-label {
  display: block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.telemetry-val {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.telemetry-val.highlight-green {
  color: #a3e635;
}

/* Knowledge Graph */
.graph-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  overflow: hidden;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  background: rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid var(--border-color);
}

.header-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
}

.graph-legend {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 2px;
}

.dot.green { background: #76b900; }
.dot.violet { background: #8b5cf6; }
.dot.blue { background: #38bdf8; }
.dot.amber { background: #f59e0b; }

.canvas-container {
  width: 100%;
  height: 340px;
  position: relative;
  background: radial-gradient(circle at center, rgba(15, 23, 42, 0.9) 0%, rgba(9, 13, 22, 1) 100%);
}

canvas#knowledgeGraphCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Brief & Tabs */
.brief-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.tab-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--border-color);
}

.tabs-list {
  display: flex;
  gap: 6px;
}

.tab-btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.tab-btn.active {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-bottom: 2px solid var(--nvidia-green);
}

.tab-actions {
  display: flex;
  gap: 8px;
}

.action-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.78rem;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.action-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
}

.tab-content {
  padding: 24px;
  min-height: 360px;
}

.tab-pane {
  display: none;
}

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

/* Markdown styling */
.markdown-body {
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.markdown-body h2 {
  font-size: 1.3rem;
  color: #a3e635;
  margin-top: 20px;
  margin-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 6px;
}

.markdown-body h2:first-child {
  margin-top: 0;
}

.markdown-body p {
  margin-bottom: 12px;
}

.markdown-body ul {
  padding-left: 20px;
  margin-bottom: 14px;
}

.markdown-body li {
  margin-bottom: 6px;
}

.markdown-body code {
  background: rgba(0, 0, 0, 0.4);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: #38bdf8;
}

/* Evidence Ledger */
.evidence-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.evidence-card {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  transition: all 0.2s;
}

.evidence-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
}

.evidence-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.evidence-url {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--tavily-blue);
  text-decoration: none;
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

.evidence-snippet {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Thought Stream Log Console */
.thought-stream-console {
  background: #050811;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  height: 340px;
  overflow-y: auto;
}

.log-entry {
  padding: 4px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.log-entry.NEMOTRON_NANO { color: #a3e635; }
.log-entry.NEMOTRON_ULTRA { color: #c084fc; }
.log-entry.TAVILY_API { color: #38bdf8; }
.log-entry.DECOMPOSE_DONE, .log-entry.TAVILY_COMPLETE { color: #4ade80; }
.log-entry.WARN { color: #f59e0b; }
.log-entry.system { color: var(--text-muted); }

.placeholder-text {
  color: var(--text-muted);
  text-align: center;
  padding: 60px 0;
  font-size: 0.9rem;
}

/* Footer */
.app-footer {
  margin-top: 40px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}

.footer-links {
  margin-top: 6px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text-primary);
}

/* Responsive */
@media (max-width: 900px) {
  .pipeline-stages {
    grid-template-columns: 1fr 1fr;
  }
  .telemetry-bar {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .keys-grid {
    grid-template-columns: 1fr;
  }
}