:root {
  --bg-color: #0b0f17;
  --panel-bg: rgba(18, 24, 38, 0.75);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-green: #10b981;
  --accent-green-glow: rgba(16, 185, 129, 0.35);
  --accent-cyan: #06b6d4;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  background-color: var(--bg-color);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(16, 185, 129, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(6, 182, 212, 0.08) 0%, transparent 40%);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.app-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px;
}

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

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

.logo-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #10b981, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0b0f17;
  box-shadow: 0 4px 20px var(--accent-green-glow);
}

.logo-text {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.accent-text {
  color: var(--accent-green);
}

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

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

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.sound-toggle {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--panel-border);
  color: var(--text-secondary);
  width: 38px;
  height: 38px;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.sound-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.hidden {
  display: none !important;
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1.05fr 1.15fr;
  gap: 24px;
}

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

/* Glass Panels */
.glass {
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.panel-header h2 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.step-num {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 6px;
  color: var(--text-muted);
}

.live-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: #34d399;
  background: rgba(16, 185, 129, 0.15);
  padding: 4px 10px;
  border-radius: 6px;
}

/* Controls & Inputs */
.control-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.activity-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 24px;
}

@media (max-width: 520px) {
  .activity-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.activity-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: 14px 10px;
  text-align: center;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
  color: var(--text-primary);
}

.activity-card .icon {
  font-size: 26px;
}

.activity-card .name {
  font-size: 13px;
  font-weight: 700;
}

.activity-card .intensity-tag {
  font-size: 10px;
  color: var(--text-muted);
  font-weight: 600;
}

.activity-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.activity-card.active {
  background: rgba(16, 185, 129, 0.12);
  border-color: var(--accent-green);
  box-shadow: 0 0 15px var(--accent-green-glow);
}

.activity-card.active .name {
  color: #34d399;
}

/* Slider styling */
.control-group {
  margin-bottom: 22px;
}

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

.slider-header label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.slider-value {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.slider-value small {
  font-size: 12px;
  color: var(--text-muted);
}

.unit-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pill-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--panel-border);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.pill-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 12px var(--accent-green-glow);
  cursor: pointer;
  border: 2px solid #ffffff;
  transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.slider-ticks {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Intensity Buttons */
.intensity-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.intensity-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  padding: 10px 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.intensity-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.intensity-btn.active {
  background: rgba(6, 182, 212, 0.15);
  border-color: var(--accent-cyan);
  color: #67e8f9;
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.25);
}

/* Commute Toggle Card */
.commute-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-top: 10px;
}

.commute-toggle-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.custom-checkbox {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  accent-color: #10b981;
  cursor: pointer;
}

.commute-toggle-row label {
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.commute-toggle-row strong {
  font-size: 13px;
  color: var(--text-primary);
}

.commute-toggle-row span {
  font-size: 11px;
  color: var(--text-muted);
}

.commute-distance-row {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
}

.commute-distance-row strong {
  color: #34d399;
  font-family: var(--font-mono);
}

/* Right Panel: Output & Battery */
.hero-metric-card {
  background: linear-gradient(145deg, rgba(16, 185, 129, 0.08), rgba(6, 182, 212, 0.05));
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
}

.metric-top {
  display: flex;
  justify-content: space-around;
  align-items: center;
  margin-bottom: 20px;
}

.metric-block {
  text-align: center;
}

.metric-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  display: block;
  margin-bottom: 4px;
}

.metric-num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 800;
  color: var(--text-primary);
}

.metric-num small {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
}

.metric-num.neon {
  color: #34d399;
  text-shadow: 0 0 15px var(--accent-green-glow);
}

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

.divider-v {
  width: 1px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
}

/* Battery Visualizer */
.battery-visualizer {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  max-width: 440px;
  margin: 0 auto;
}

.battery-casing {
  flex: 1;
  height: 38px;
  background: rgba(0, 0, 0, 0.4);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  padding: 4px;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6);
}

.battery-terminal {
  width: 6px;
  height: 18px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 0 4px 4px 0;
  margin-left: 2px;
}

.battery-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, #10b981, #34d399, #06b6d4);
  transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  box-shadow: 0 0 15px var(--accent-green-glow);
}

.battery-shimmer {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.battery-pct {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: #ffffff;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.8);
  pointer-events: none;
}

/* Equivalencies */
.equivalencies-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

@media (max-width: 520px) {
  .equivalencies-grid {
    grid-template-columns: 1fr;
  }
}

.eq-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: var(--transition);
}

.eq-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
}

.eq-icon {
  font-size: 24px;
}

.eq-text {
  display: flex;
  flex-direction: column;
}

.eq-text strong {
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--text-primary);
}

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

/* Carbon Impact Card */
.carbon-impact-card {
  background: rgba(6, 182, 212, 0.06);
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 20px;
}

.carbon-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.carbon-icon-wrap {
  font-size: 26px;
}

.carbon-header h3 {
  font-size: 15px;
  font-weight: 700;
  color: #67e8f9;
}

.carbon-header p {
  font-size: 12px;
  color: var(--text-muted);
}

.carbon-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  text-align: center;
}

.stat-box {
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-sm);
  padding: 10px 8px;
}

.stat-label {
  display: block;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stat-val {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-val.highlight {
  color: #34d399;
}

.stat-val small {
  font-size: 10px;
  font-weight: 500;
  color: var(--text-muted);
}

/* Refuel Section */
.refuel-section {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 20px;
}

.refuel-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.refuel-title h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.tooltip-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  padding: 2px 8px;
  border-radius: 4px;
}

.refuel-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.snack-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.snack-chip {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-border);
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.snack-chip:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.snack-chip.active {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--accent-green);
  color: #34d399;
}

.snack-chip.warning.active {
  background: rgba(244, 63, 94, 0.15);
  border-color: var(--accent-rose);
  color: #fda4af;
}

.net-climate-badge {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius-sm);
  padding: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  transition: var(--transition);
}

.net-climate-badge.warning {
  background: rgba(244, 63, 94, 0.08);
  border-color: rgba(244, 63, 94, 0.25);
}

.badge-icon {
  font-size: 20px;
}

.badge-content strong {
  display: block;
  font-size: 13px;
  color: #34d399;
  margin-bottom: 2px;
}

.net-climate-badge.warning .badge-content strong {
  color: #fb7185;
}

.badge-content span {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.4;
  display: block;
}

/* Action Buttons */
.action-footer {
  display: flex;
  gap: 12px;
}

.primary-btn {
  flex: 1;
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
  box-shadow: 0 4px 15px var(--accent-green-glow);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--panel-border);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.secondary-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* Modal */
.modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-box {
  max-width: 580px;
  width: 100%;
  position: relative;
  padding: 30px;
}

.close-modal {
  position: absolute;
  top: 16px;
  right: 18px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 26px;
  cursor: pointer;
  line-height: 1;
}

.close-modal:hover {
  color: var(--text-primary);
}

.cert-card {
  background: linear-gradient(145deg, #0e1626, #09101b);
  border: 2px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

.cert-watermark {
  position: absolute;
  font-size: 72px;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.02);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) rotate(-15deg);
  pointer-events: none;
}

.cert-header {
  text-align: center;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.15);
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.cert-tag {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: #34d399;
  background: rgba(16, 185, 129, 0.15);
  padding: 4px 10px;
  border-radius: 999px;
  display: inline-block;
  margin-bottom: 8px;
}

.cert-header h3 {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.3px;
  margin-bottom: 4px;
}

.cert-header p {
  font-size: 12px;
  color: var(--text-muted);
}

.cert-highlight-row {
  display: flex;
  justify-content: space-around;
  margin-bottom: 20px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-sm);
  padding: 12px;
}

.cert-metric {
  text-align: center;
}

.cm-label {
  display: block;
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.cm-value {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
}

.cm-value.green {
  color: #34d399;
}

.cert-details p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.cert-details strong {
  color: var(--text-primary);
}

.cert-footer {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
}

.cert-code {
  font-family: var(--font-mono);
  color: #34d399;
}

.modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

/* Footer */
.app-footer {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--panel-border);
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
}

.methodology-note em {
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  gap: 10px;
  align-items: center;
}

.footer-links a {
  color: #34d399;
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}