:root {
  --bg-canvas: #0b0e14;
  --bg-surface: #131822;
  --bg-elevated: #1b2230;
  --border-subtle: #263042;
  --border-focus: #3b82f6;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #3b82f6;
  --accent-blue-hover: #2563eb;
  --status-ok-bg: rgba(16, 185, 129, 0.14);
  --status-ok-border: rgba(16, 185, 129, 0.45);
  --status-ok-text: #34d399;
  --status-warn-bg: rgba(245, 158, 11, 0.15);
  --status-warn-border: rgba(245, 158, 11, 0.48);
  --status-warn-text: #fbbf24;
  --status-err-bg: rgba(239, 68, 68, 0.15);
  --status-err-border: rgba(239, 68, 68, 0.5);
  --status-err-text: #f87171;
  --status-neutral-bg: rgba(148, 163, 184, 0.14);
  --status-neutral-border: rgba(148, 163, 184, 0.35);
  --status-neutral-text: #cbd5e1;
  --radius-lg: 14px;
  --radius-md: 10px;
  --touch-min: 56px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 84px;
}

/* Top Bar */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

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

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.4);
  color: var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-subtitle {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--text-secondary);
}

.main-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tab-btn {
  min-height: var(--touch-min);
  padding: 0 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
  font-size: 16px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.tab-btn.active {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #ffffff;
}

.top-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.auth-pill {
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  background-color: var(--status-neutral-bg);
  border: 1px solid var(--status-neutral-border);
  color: var(--status-neutral-text);
}

.auth-pill.authenticated {
  background-color: var(--status-ok-bg);
  border-color: var(--status-ok-border);
  color: var(--status-ok-text);
}

/* Buttons */
.primary-btn,
.secondary-btn,
.ghost-btn,
.chip-btn,
.transport-btn {
  min-height: var(--touch-min);
  padding: 0 20px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.primary-btn {
  background-color: var(--accent-blue);
  border: 1px solid var(--accent-blue);
  color: #ffffff;
}

.primary-btn:hover {
  background-color: var(--accent-blue-hover);
}

.secondary-btn {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.ghost-btn {
  min-height: 46px;
  padding: 0 14px;
  background-color: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.chip-btn {
  min-height: 48px;
  padding: 8px 16px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 15px;
}

.chip-btn.active,
.chip-btn:hover {
  border-color: var(--accent-blue);
  background-color: rgba(59, 130, 246, 0.16);
}

/* Pairing Gate */
.pairing-gate {
  padding: 20px 24px 0;
}

.pairing-card {
  background-color: var(--bg-surface);
  border: 2px solid var(--status-warn-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 24px;
}

.pairing-code-box {
  margin: 16px 0;
  padding: 18px 20px;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.pairing-code-digits {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--status-warn-text);
  font-variant-numeric: tabular-nums;
}

.pairing-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.mobile-approve-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}

.mobile-approve-form input,
.dispatch-input-row input,
.car-select {
  min-height: var(--touch-min);
  padding: 0 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-size: 17px;
}

/* Workspace */
.workspace {
  padding: 20px 24px;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
}

.invariant-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 18px;
  font-size: 14px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.invariant-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.dot-ok {
  background-color: var(--status-ok-text);
}

/* Agents 4-Card Grid */
.agents-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.agent-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.agent-card.stale-card {
  border-color: var(--status-warn-border);
}

.agent-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.agent-name {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
}

.agent-role {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--text-secondary);
}

.headline-banner {
  padding: 10px 12px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 700;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-elevated);
}

.dimension-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.dimension-box {
  padding: 8px 10px;
  border-radius: 8px;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
}

.dimension-label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
}

.dimension-val {
  display: block;
  margin-top: 2px;
  font-size: 14px;
  font-weight: 700;
}

.agent-summary {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
  min-height: 40px;
}

.agent-meta-foot {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 10px;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  border: 1px solid transparent;
}

.badge-ok {
  background-color: var(--status-ok-bg);
  border-color: var(--status-ok-border);
  color: var(--status-ok-text);
}

.badge-warn {
  background-color: var(--status-warn-bg);
  border-color: var(--status-warn-border);
  color: var(--status-warn-text);
}

.badge-err {
  background-color: var(--status-err-bg);
  border-color: var(--status-err-border);
  color: var(--status-err-text);
}

.badge-neutral,
.badge-info {
  background-color: var(--status-neutral-bg);
  border-color: var(--status-neutral-border);
  color: var(--status-neutral-text);
}

/* Two Column Section */
.two-col-section {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 20px;
}

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

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.card-title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
}

.card-subtitle {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--text-secondary);
}

.preset-chips {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.dispatch-input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

.form-feedback {
  margin: 8px 0 0;
  font-size: 14px;
  color: var(--status-warn-text);
}

.task-list-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 18px 0 10px;
}

.task-list-header h3 {
  margin: 0;
  font-size: 16px;
}

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

.task-list,
.receipt-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.task-item,
.receipt-item {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
}

.task-item.timeout-alert {
  border-color: var(--status-err-border);
  background-color: rgba(239, 68, 68, 0.07);
}

.task-item-top,
.receipt-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.task-prompt {
  margin: 8px 0;
  font-size: 16px;
  font-weight: 600;
}

.task-meta {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 4px 0;
}

.task-actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.task-action-btn {
  min-height: 44px;
  padding: 0 14px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-elevated);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

/* Media Player */
.now-playing-box {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 18px;
  padding: 18px;
  border-radius: var(--radius-md);
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  margin-bottom: 18px;
}

.album-art-placeholder {
  width: 96px;
  height: 96px;
  border-radius: 12px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
}

.track-mode-tag {
  font-size: 12px;
  color: var(--accent-blue);
  font-weight: 700;
}

.track-title {
  margin: 4px 0 2px;
  font-size: 24px;
}

.track-artist {
  margin: 0 0 12px;
  color: var(--text-secondary);
  font-size: 15px;
}

.progress-bar-wrap {
  height: 8px;
  background-color: var(--bg-elevated);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--accent-blue);
}

.progress-times {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 6px;
}

.media-transport-controls {
  display: grid;
  grid-template-columns: 1fr 1.4fr 1fr;
  gap: 12px;
  margin-bottom: 18px;
}

.transport-btn {
  min-height: 64px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 17px;
}

.transport-btn-primary {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #ffffff;
}

.device-selector-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.playlist-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 18px;
}

.playlist-btn {
  min-height: 64px;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
}

.architecture-callout {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  font-size: 14px;
  color: var(--text-secondary);
}

.architecture-callout h3 {
  margin: 0 0 6px;
  font-size: 15px;
  color: var(--text-primary);
}

/* Probe Grid */
.probe-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.probe-item {
  padding: 14px;
  border-radius: var(--radius-md);
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
}

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

.probe-value {
  margin-top: 4px;
  font-size: 16px;
  font-weight: 700;
  word-break: break-word;
}

.topology-list {
  margin: 0;
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  color: var(--text-secondary);
}

.topology-list strong {
  color: var(--text-primary);
}

/* Prototype Floating Footer */
.prototype-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(19, 24, 34, 0.96);
  border-top: 1px solid var(--border-subtle);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  z-index: 20;
}

.proto-bar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.proto-tag {
  padding: 4px 10px;
  border-radius: 6px;
  background-color: rgba(59, 130, 246, 0.2);
  color: var(--accent-blue);
  font-size: 12px;
  font-weight: 700;
}

.proto-verdict {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 600;
}

.proto-bar-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.proto-btn {
  min-height: 40px;
  padding: 0 12px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.proto-btn.active {
  border-color: var(--accent-blue);
  color: var(--text-primary);
  background-color: rgba(59, 130, 246, 0.22);
}

@media (max-width: 1180px) {
  .agents-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .two-col-section,
  .pairing-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .agents-grid,
  .probe-grid {
    grid-template-columns: 1fr;
  }
  .dispatch-input-row {
    grid-template-columns: 1fr;
  }
}

.demo-note {
  grid-column: 1 / -1;
  padding: 8px 14px;
  border: 1px dashed #d9b44a;
  border-radius: 10px;
  background: rgba(255, 193, 7, 0.08);
  color: #8a6d3b;
  font-size: 13px;
}