:root {
  --bg-base: #0b0f19;
  --bg-card: #111827;
  --bg-card-hover: #1f2937;
  --card-border: rgba(255, 255, 255, 0.08);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --brand: #3b82f6;
  --brand-light: rgba(59, 130, 246, 0.15);
  --green: #10b981;
  --green-light: rgba(16, 185, 129, 0.15);
  --red: #ef4444;
  --red-light: rgba(239, 68, 68, 0.15);
  --amber: #f59e0b;
  --amber-light: rgba(245, 158, 11, 0.15);
  --font-main: 'Prompt', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-code: 'JetBrains Mono', monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: all 0.2s ease;
}

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

body {
  font-family: var(--font-main);
  background: var(--bg-base);
  color: var(--text-main);
  line-height: 1.6;
  padding: 24px 20px;
  min-height: 100vh;
}

.quant-container {
  max-width: 1320px;
  margin: 0 auto;
}

/* Header */
.quant-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 22px 28px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 18px;
}

.logo-badge {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #fff;
  font-family: var(--font-code);
  font-weight: 800;
  font-size: 0.95rem;
  padding: 8px 14px;
  border-radius: 8px;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.quant-header h1 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.header-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 3px;
}

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

.status-chip {
  font-size: 0.88rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 9999px;
  white-space: nowrap;
}

.live-chip {
  background: var(--green-light);
  color: var(--green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-outline {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--card-border);
}

.btn-outline:hover {
  background: var(--bg-card-hover);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  transition: var(--transition);
}

.metric-card:hover {
  border-color: rgba(59, 130, 246, 0.35);
  transform: translateY(-2px);
}

.metric-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
}

.metric-val {
  font-family: var(--font-code);
  font-size: 1.85rem;
  font-weight: 800;
  margin: 6px 0 4px;
}

.metric-note {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.text-brand { color: #60a5fa; }
.text-amber { color: #fbbf24; }
.text-green { color: #34d399; }
.text-red { color: #f87171; }

/* Cards Box */
.card-box {
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.card-box-header {
  margin-bottom: 16px;
}

.card-box-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
}

/* Chart Section */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.section-title-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.section-title-wrap h2 {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
}

.chart-legend-badge {
  font-size: 0.82rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.legend-buy {
  background: var(--green-light);
  color: var(--green);
}

.legend-sell {
  background: var(--red-light);
  color: var(--red);
}

.chart-controls {
  display: flex;
  gap: 6px;
}

.btn-time {
  background: var(--bg-card-hover);
  color: var(--text-muted);
  border: 1px solid var(--card-border);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-time:hover,
.btn-time.active {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
}

.chart-container {
  width: 100%;
  height: 420px;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #0d131f;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.sub-chart-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 18px;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 8px;
}

.sub-note {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
}

.sub-chart-container {
  width: 100%;
  height: 180px;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #0d131f;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Two Column Grid */
.two-col-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

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

/* LINE Preview Box */
.line-preview-box {
  background: #06c755;
  padding: 16px;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}

.line-bubble {
  background: #ffffff;
  color: #1f2937;
  border-radius: 12px;
  padding: 14px 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.line-bubble-header {
  font-weight: 800;
  font-size: 1.05rem;
  color: #06c755;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 6px;
  margin-bottom: 8px;
}

.line-bubble-body {
  font-size: 0.9rem;
  line-height: 1.55;
}

.help-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Steps List */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.step-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  padding: 14px 16px;
  border-radius: var(--radius-md);
}

.step-badge {
  background: var(--brand);
  color: #fff;
  font-family: var(--font-code);
  font-weight: 800;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.9rem;
}

.step-item strong {
  color: #fff;
  font-size: 0.95rem;
}

.step-item p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 2px;
}

.step-item code {
  background: rgba(0, 0, 0, 0.3);
  color: #93c5fd;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-code);
  font-size: 0.85rem;
}

/* Table Responsive */
.table-responsive {
  max-height: 420px;
  overflow-y: auto;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
}

.quant-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.quant-table th {
  background: #162033;
  color: var(--text-main);
  font-weight: 700;
  padding: 12px 16px;
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.quant-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--card-border);
  font-family: var(--font-code);
}

.quant-table tbody tr:hover {
  background: var(--bg-card-hover);
}

.badge-win {
  background: var(--green-light);
  color: var(--green);
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}

.badge-loss {
  background: var(--red-light);
  color: var(--red);
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}

/* Live Signal Banner */
.live-signal-banner {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08) 0%, rgba(13, 19, 31, 0.95) 100%);
  border: 1px solid rgba(16, 185, 129, 0.35);
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.live-signal-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--green);
}

.signal-badge-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.pulse-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.signal-tag {
  font-size: 0.95rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
}

.tag-buy {
  background: var(--green-light);
  color: var(--green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.signal-details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.sig-col {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sig-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.sig-val {
  font-size: 1.05rem;
  font-family: var(--font-code);
  font-weight: 700;
  color: #fff;
}

/* Backtest Toolbar */
.backtest-toolbar {
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  margin-bottom: 20px;
}

.toolbar-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--card-border);
}

.toolbar-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.toolbar-icon {
  font-size: 1.6rem;
}

.toolbar-title h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: #fff;
  margin: 0;
}

.toolbar-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 2px 0 0 0;
}

.strategy-presets {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.preset-btn {
  background: var(--bg-card-hover);
  color: var(--text-muted);
  border: 1px solid var(--card-border);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.preset-btn:hover {
  background: rgba(59, 130, 246, 0.15);
  color: #fff;
  border-color: rgba(59, 130, 246, 0.4);
}

.preset-btn.active {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.35);
}

.preset-btn-reb {
  background: var(--bg-card-hover);
  color: var(--text-muted);
  border: 1px solid var(--card-border);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.preset-btn-reb:hover {
  background: rgba(16, 185, 129, 0.15);
  color: #fff;
  border-color: rgba(16, 185, 129, 0.4);
}

.preset-btn-reb.active {
  background: #10b981;
  color: #fff;
  border-color: #10b981;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.35);
}

.param-controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  align-items: flex-end;
}

.param-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.param-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.input-with-unit {
  display: flex;
  align-items: center;
  background: var(--bg-dark);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0 10px;
  transition: var(--transition);
}

.input-with-unit:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.input-with-unit input {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-family: var(--font-code);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 8px 0;
}

.input-with-unit span {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 6px;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  border: none;
}

.btn-primary:hover {
  background: #2563eb;
  transform: translateY(-1px);
}

.btn-run {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.95rem;
  font-weight: 700;
  justify-content: center;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

/* ==========================================================================
   Mode Switcher Tabs & Ramanujan Rebalance Styles
   ========================================================================== */
.strategy-mode-selector {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 6px;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.mode-tab-btn {
  flex: 1;
  min-width: 260px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
  padding: 13px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.mode-tab-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.mode-tab-btn.active {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(99, 102, 241, 0.25));
  border-color: rgba(99, 102, 241, 0.5);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.2);
}

.mode-tab-btn.active.tab-rebalance {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(20, 184, 166, 0.25));
  border-color: rgba(16, 185, 129, 0.5);
  color: #34d399;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.2);
}

/* Allocation Bar */
.allocation-bar-container {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 24px;
}

.allocation-labels {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 0.88rem;
  font-weight: 700;
}

.allocation-bar {
  height: 14px;
  background: #334155;
  border-radius: 9999px;
  overflow: hidden;
  display: flex;
}

.bar-stock {
  background: linear-gradient(90deg, #10b981, #34d399);
  height: 100%;
  transition: width 0.4s ease;
}

.bar-cash {
  background: linear-gradient(90deg, #3b82f6, #60a5fa);
  height: 100%;
  transition: width 0.4s ease;
}

.badge-rebalance-buy {
  background: rgba(16, 185, 129, 0.18);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.75rem;
  white-space: nowrap;
}

.badge-rebalance-sell {
  background: rgba(239, 68, 68, 0.18);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.75rem;
  white-space: nowrap;
}

/* Footer */
.quant-footer {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--card-border);
}