:root {
  /* Smeargle Cashmere & Jewel System */
  --bg-canvas: #FAF6F0;
  --bg-surface-1: #F3ECE1;
  --bg-surface-2: #EAE0D2;
  --bg-surface-3: #DFD2C0;
  --bg-elevated: #FCF9F5;

  --text-primary: #1E1915;
  --text-secondary: #574C43;
  --text-muted: #8A7D71;
  --text-on-jewel: #FAF6F0;

  --border-subtle: #E2D7C7;
  --border-strong: #C9B9A6;
  --border-focus: #0F5238;

  --jewel-emerald: #0F5238;
  --jewel-emerald-hover: #0A3B28;
  --jewel-emerald-tint: #E4EFEA;

  --jewel-sapphire: #16325B;
  --jewel-sapphire-hover: #0E2240;
  --jewel-sapphire-tint: #E6ECF4;

  --jewel-amber: #B4690E;
  --jewel-amber-hover: #8F5108;
  --jewel-amber-tint: #F7EFE4;

  --jewel-ruby: #8C1D2E;
  --jewel-ruby-hover: #6B1422;
  --jewel-ruby-tint: #F5E6E8;

  /* Legacy alias mappings for PeopleAgentMesh components */
  --bg-primary: var(--bg-canvas);
  --bg-secondary: var(--bg-surface-1);
  --bg-tertiary: var(--bg-surface-2);
  --bg-card: var(--bg-elevated);
  --bg-card-hover: var(--bg-surface-2);
  --border-color: var(--border-subtle);
  --accent-cyan: var(--jewel-emerald);
  --accent-blue: var(--jewel-sapphire);
  --accent-purple: var(--jewel-sapphire);
  --accent-green: var(--jewel-emerald);
  --accent-amber: var(--jewel-amber);
  --accent-red: var(--jewel-ruby);

  --font-display: 'Newsreader', 'Instrument Serif', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --shadow-sm: 0 2px 8px -2px rgba(30, 25, 21, 0.06), 0 1px 3px -1px rgba(30, 25, 21, 0.04);
  --shadow-md: 0 8px 24px -4px rgba(30, 25, 21, 0.08), 0 2px 6px -1px rgba(30, 25, 21, 0.04);
}

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

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

/* Header */
header {
  background-color: rgba(250, 246, 240, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--jewel-emerald);
  color: var(--text-on-jewel);
  border: 1px solid var(--jewel-emerald-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.2rem;
  box-shadow: 0 2px 6px rgba(15, 82, 56, 0.2);
}

.brand-title h1 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-title p {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.header-badges {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.badge-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--jewel-emerald);
  box-shadow: 0 0 8px rgba(15, 82, 56, 0.45);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
  100% { opacity: 1; transform: scale(1); }
}

.badge-green { background: var(--jewel-emerald-tint); color: var(--jewel-emerald); border: 1px solid rgba(15, 82, 56, 0.25); }
.badge-blue { background: var(--jewel-sapphire-tint); color: var(--jewel-sapphire); border: 1px solid rgba(22, 50, 91, 0.25); }
.badge-amber { background: var(--jewel-amber-tint); color: var(--jewel-amber); border: 1px solid rgba(180, 105, 14, 0.25); }
.badge-purple { background: var(--jewel-sapphire-tint); color: var(--jewel-sapphire); border: 1px solid rgba(22, 50, 91, 0.25); }
.badge-red { background: var(--jewel-ruby-tint); color: var(--jewel-ruby); border: 1px solid rgba(140, 29, 46, 0.25); }

/* Navigation Tabs */
nav.tab-nav {
  background-color: var(--bg-surface-1);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 2rem;
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.85rem 0.25rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--jewel-emerald);
  border-bottom-color: var(--jewel-emerald);
}

/* Main Container */
main.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.card {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 1rem;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

input, select, textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--jewel-emerald);
  box-shadow: 0 0 0 3px rgba(15, 82, 56, 0.14);
}

textarea.mono, pre.mono {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

button.btn-primary, .btn-primary {
  background: var(--jewel-emerald);
  color: var(--text-on-jewel);
  border: 1px solid var(--jewel-emerald);
  border-radius: 8px;
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
  width: 100%;
  box-shadow: 0 2px 6px rgba(15, 82, 56, 0.18);
}

button.btn-primary:hover, .btn-primary:hover {
  background: var(--jewel-emerald-hover);
  border-color: var(--jewel-emerald-hover);
  transform: translateY(-1px);
}

.btn {
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.1rem;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
  width: auto;
}

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.8rem;
  border-radius: 6px;
}

/* Pipeline DAG Visualizer */
.pipeline-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 0.85rem 1.25rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.pipeline-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  position: relative;
}

.node-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--bg-elevated);
  border: 2px solid var(--border-strong);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: bold;
  transition: all 0.3s ease;
}

.node-label {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

.pipeline-node.active .node-circle {
  border-color: var(--jewel-sapphire);
  background-color: var(--jewel-sapphire-tint);
  color: var(--jewel-sapphire);
  box-shadow: 0 0 10px rgba(22, 50, 91, 0.2);
}

.pipeline-node.completed .node-circle {
  border-color: var(--jewel-emerald);
  background-color: var(--jewel-emerald-tint);
  color: var(--jewel-emerald);
}

.pipeline-node.interrupted .node-circle {
  border-color: var(--jewel-amber);
  background-color: var(--jewel-amber-tint);
  color: var(--jewel-amber);
  box-shadow: 0 0 12px rgba(180, 105, 14, 0.25);
}

.pipeline-arrow {
  color: var(--border-strong);
  font-weight: bold;
}

/* Slack HITL Card Simulation */
.slack-card {
  background-color: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--jewel-amber);
  border-radius: 8px;
  padding: 1.25rem;
  margin-top: 1rem;
}

.slack-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.slack-avatar {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--jewel-sapphire);
  color: var(--text-on-jewel);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: bold;
}

.slack-sender {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-primary);
}

.slack-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.slack-body {
  font-size: 0.85rem;
  margin-bottom: 1rem;
  line-height: 1.4;
  color: var(--text-primary);
}

.slack-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn-approve {
  background-color: var(--jewel-emerald);
  color: var(--text-on-jewel);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
}

.btn-revise {
  background-color: var(--jewel-amber);
  color: var(--text-on-jewel);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
}

.btn-reject {
  background-color: var(--jewel-ruby);
  color: var(--text-on-jewel);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
}

/* Output JSON Display */
.code-box {
  background-color: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  max-height: 400px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--jewel-sapphire);
}

/* Metric Pill Grid */
.metric-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.metric-pill {
  background-color: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 0.85rem;
  text-align: center;
}

.metric-val {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--jewel-emerald);
  font-variant-numeric: tabular-nums;
}

.metric-lbl {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.15rem;
}

/* Responsive */
@media (max-width: 900px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .metric-row {
    grid-template-columns: repeat(2, 1fr);
  }
}