:root {
  --bg-app: #0c0f17;
  --bg-card: #151a26;
  --bg-card-hover: #1b2232;
  --bg-card-subtle: #121622;
  --border-color: #242c3e;
  --border-focus: #3b82f6;
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --color-rubber: #10b981;
  --color-rubber-subtle: rgba(16, 185, 129, 0.15);
  --color-oil: #38bdf8;
  --color-oil-subtle: rgba(56, 189, 248, 0.15);
  --color-rss3: #f59e0b;
  --color-wti: #a855f7;

  --color-up: #10b981;
  --color-down: #ef4444;
  --color-neutral: #94a3b8;

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

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 24px 20px;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

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

.badge-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: rgba(56, 189, 248, 0.12);
  color: var(--color-oil);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 2px 8px;
  border-radius: 4px;
}

.title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
}

.subtitle {
  font-size: 13px;
  color: var(--text-secondary);
}

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

.status-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  font-size: 12px;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #eab308;
  animation: pulse 2s infinite;
}

.status-dot.connected {
  background-color: var(--color-up);
}

.status-dot.fallback {
  background-color: #3b82f6;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.9); }
}

.range-selector {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.range-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.range-btn:hover {
  color: #fff;
}

.range-btn.active {
  background: var(--border-color);
  color: #fff;
}

.btn-refresh {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-refresh:hover {
  background: var(--bg-card-hover);
  border-color: #3b82f6;
}

/* KPI Cards Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  position: relative;
  overflow: hidden;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.kpi-card:hover {
  transform: translateY(-2px);
  border-color: #334155;
}

.kpi-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.card-tsr20::before { background: var(--color-rubber); }
.card-rss3::before { background: var(--color-rss3); }
.card-brent::before { background: var(--color-oil); }
.card-wti::before { background: var(--color-wti); }
.card-ratio::before { background: #3b82f6; }
.card-parity::before { background: #ec4899; }

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

.kpi-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.kpi-ticker {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 1px 5px;
  border-radius: 3px;
}

.kpi-value-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
}

.kpi-price {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
}

.kpi-unit {
  font-size: 12px;
  color: var(--text-muted);
}

.kpi-change-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
}

.change-pill {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 6px;
  border-radius: 4px;
}

.change-up {
  color: var(--color-up);
  background: rgba(16, 185, 129, 0.12);
}

.change-down {
  color: var(--color-down);
  background: rgba(239, 68, 68, 0.12);
}

.change-neutral {
  color: var(--color-neutral);
  background: rgba(148, 163, 184, 0.1);
}

.kpi-subtext {
  font-size: 11px;
  color: var(--text-muted);
}

/* Charts Section */
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

@media (max-width: 1024px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}

.chart-title-group h3 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
}

.chart-title-group p {
  font-size: 12px;
  color: var(--text-secondary);
}

.legend-group {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
}

.legend-color {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.canvas-container {
  position: relative;
  width: 100%;
  height: 320px;
  margin-top: 8px;
}

canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

/* Bottom Insights Grid */
.insights-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

@media (max-width: 860px) {
  .insights-grid {
    grid-template-columns: 1fr;
  }
}

.insight-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
}

.insight-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.linkage-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.linkage-item {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.linkage-item h4 {
  font-size: 13px;
  font-weight: 600;
  color: #e2e8f0;
  margin-bottom: 4px;
}

.linkage-item p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.commentary-box {
  background: rgba(56, 189, 248, 0.05);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-sm);
  padding: 14px;
  font-size: 13px;
  color: #bae6fd;
  line-height: 1.5;
  margin-bottom: 14px;
}

.metrics-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.metrics-table td {
  padding: 10px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.metrics-table td:first-child {
  color: var(--text-secondary);
}

.metrics-table td:last-child {
  text-align: right;
  font-weight: 600;
  font-family: var(--font-mono);
  color: #fff;
}

/* API Inspector Drawer / Footer */
.api-bar {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.api-bar-left {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
}

.code-endpoint {
  font-family: var(--font-mono);
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 4px;
  color: #38bdf8;
  font-size: 12px;
}

.api-bar-right {
  font-size: 12px;
  color: var(--text-muted);
}