:root {
  --bg-primary: #07080a;
  --bg-secondary: #0f1115;
  --bg-card: rgba(18, 20, 26, 0.75);
  --bg-card-hover: rgba(26, 29, 38, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(212, 175, 55, 0.4);
  
  --accent-gold: #d4af37;
  --accent-copper: #c5a059;
  --accent-cyan: #22d3ee;
  --accent-green: #10b981;
  --accent-purple: #a855f7;
  --accent-red: #ef4444;
  --accent-amber: #f59e0b;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Courier New", monospace;
  
  --shadow-luxury: 0 10px 30px -10px rgba(0, 0, 0, 0.8), 0 0 20px -5px rgba(212, 175, 55, 0.1);
  --glow-cyan: 0 0 25px rgba(34, 211, 238, 0.25);
  --glow-gold: 0 0 25px rgba(212, 175, 55, 0.25);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 20% 15%, rgba(212, 175, 55, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 80% 85%, rgba(34, 211, 238, 0.04) 0%, transparent 40%);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

/* App Container */
.app-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

/* Top Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #1e222d, #0d0f14);
  border: 1px solid var(--accent-gold);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--glow-gold);
}

.brand-logo svg {
  width: 26px;
  height: 26px;
  stroke: var(--accent-gold);
}

.brand-title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 2px;
  background: linear-gradient(120deg, #ffffff 40%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-copper);
  font-weight: 600;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
}

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

.badge-live {
  border-color: rgba(16, 185, 129, 0.3);
  color: #34d399;
}

.badge-demo {
  border-color: rgba(245, 158, 11, 0.3);
  color: var(--accent-amber);
}

.btn-luxury {
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.2), rgba(197, 160, 89, 0.05));
  border: 1px solid var(--accent-gold);
  color: #fff;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-luxury:hover {
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.35), rgba(197, 160, 89, 0.15));
  box-shadow: var(--glow-gold);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Vehicle Spec Banner */
.vehicle-banner {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  box-shadow: var(--shadow-luxury);
  position: relative;
  overflow: hidden;
}

.vehicle-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--accent-gold), transparent);
}

.vehicle-info {
  display: flex;
  align-items: center;
  gap: 18px;
}

.vehicle-thumb {
  width: 68px;
  height: 42px;
  background: radial-gradient(circle, #252b36, #0e1117);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.vehicle-thumb svg {
  width: 38px;
  height: 24px;
  fill: var(--accent-copper);
}

.vehicle-name {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
}

.vehicle-meta {
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  gap: 12px;
  margin-top: 4px;
}

.vehicle-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.quick-pills {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.quick-pill {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  text-align: right;
}

.quick-pill-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.quick-pill-val {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.quick-pill-val.gold { color: var(--accent-gold); }
.quick-pill-val.cyan { color: var(--accent-cyan); }
.quick-pill-val.green { color: var(--accent-green); }

/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.kpi-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  position: relative;
  transition: transform 0.2s, border-color 0.2s;
}

.kpi-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.18);
}

.kpi-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.kpi-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
}

.kpi-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  display: flex;
  align-items: center;
  justify-content: center;
}

.kpi-icon svg {
  width: 18px;
  height: 18px;
  stroke: var(--accent-copper);
}

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

.kpi-value {
  font-size: 32px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #fff;
  letter-spacing: -0.5px;
}

.kpi-unit {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

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

.kpi-progress {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  margin-top: 14px;
  overflow: hidden;
}

.kpi-progress-bar {
  height: 100%;
  border-radius: 999px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Nav Tabs */
.tabs-nav {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 28px;
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs-nav::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  background: none;
  border: none;
  outline: none;
  padding: 12px 20px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.3px;
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tab-btn svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

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

.tab-btn.active {
  color: var(--accent-gold);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gold);
  box-shadow: var(--glow-gold);
}

/* Tab Panels */
.tab-panel {
  display: none;
}

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

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

/* Section Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}

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

.card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-luxury);
  margin-bottom: 24px;
}

.card-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-title svg {
  width: 20px;
  height: 20px;
  stroke: var(--accent-gold);
}

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

/* Scatter Plot Controls */
.filter-group {
  display: flex;
  gap: 6px;
  background: rgba(255, 255, 255, 0.04);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.filter-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s;
}

.filter-btn.active {
  background: rgba(212, 175, 55, 0.2);
  color: var(--accent-gold);
  font-weight: 600;
}

/* Chart Canvas Container */
.chart-container {
  position: relative;
  width: 100%;
  height: 380px;
}

/* Custom Tooltip */
.chart-stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
}

.chart-stat-box {
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.chart-stat-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.chart-stat-value {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-mono);
  margin-top: 2px;
}

/* Metric List Rows */
.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.metric-row:last-child {
  border-bottom: none;
}

.metric-row-label {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.metric-row-value {
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: #fff;
}

/* Fast Charge Stress Gauge */
.stress-gauge-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 0 20px;
}

.gauge-svg {
  width: 220px;
  height: 120px;
}

.gauge-score {
  font-size: 36px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-gold);
  margin-top: -30px;
}

.gauge-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

/* Health Passport Certificate Styling */
.passport-card {
  background: linear-gradient(145deg, #11141b, #0c0e12);
  border: 1px solid rgba(212, 175, 55, 0.35);
  border-radius: var(--radius-lg);
  padding: 36px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.9), 0 0 30px rgba(212, 175, 55, 0.15);
}

.passport-watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-25deg);
  font-size: 80px;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.02);
  letter-spacing: 8px;
  pointer-events: none;
  white-space: nowrap;
}

.passport-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid rgba(212, 175, 55, 0.25);
  padding-bottom: 20px;
  margin-bottom: 26px;
}

.passport-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: #fff;
}

.passport-sub {
  font-size: 12px;
  color: var(--accent-gold);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-top: 4px;
}

.passport-seal {
  width: 64px;
  height: 64px;
  border: 2px solid var(--accent-gold);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.15), transparent);
  box-shadow: var(--glow-gold);
}

.seal-grade {
  font-size: 22px;
  font-weight: 900;
  color: var(--accent-gold);
  line-height: 1;
}

.seal-text {
  font-size: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
}

.passport-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 28px;
}

@media (max-width: 768px) {
  .passport-grid {
    grid-template-columns: 1fr;
  }
}

.passport-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px;
}

.passport-box-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.passport-box-val {
  font-size: 18px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: #fff;
  margin-top: 4px;
}

.passport-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 18px;
  font-size: 11px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 10px;
}

/* Modal / Config Form */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  padding: 30px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.95);
  animation: modalScale 0.25s ease-out;
}

@keyframes modalScale {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 600;
}

.form-input, .form-select {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
  font-family: inherit;
}

.form-input:focus, .form-select:focus {
  border-color: var(--accent-gold);
}

.form-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Responsive */
@media (max-width: 768px) {
  .app-container {
    padding: 16px 12px 60px;
  }
  .header {
    flex-direction: column;
    align-items: flex-start;
  }
  .vehicle-banner {
    flex-direction: column;
    align-items: flex-start;
  }
  .quick-pills {
    width: 100%;
    justify-content: space-between;
  }
}