:root {
  --bg-ledger: #F7F4ED;
  --bg-panel: #EDE8DD;
  --bg-panel-elevated: #FBF9F5;
  --ink-primary: #141516;
  --ink-secondary: #494C50;
  --ink-muted: #6C7075;
  --border-rule: #D3CCC0;
  --border-strong: #141516;
  --navy-settlement: #1B4D8E;
  --green-authorized: #1B6B50;
  --vermilion-rollback: #C84B31;
  --amber-warning: #9B6418;
  --font-serif: 'Newsreader', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-ledger);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.ledger-header {
  border-bottom: 2px solid var(--border-strong);
  background-color: var(--bg-panel);
  padding: 1.25rem 1.75rem;
}

.header-inner {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
}

.ledger-ref {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--navy-settlement);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 2.1rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.02em;
  color: var(--ink-primary);
}

.brand-subtitle {
  margin: 0.2rem 0 0;
  color: var(--ink-secondary);
  font-size: 0.92rem;
}

.header-badges {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.spec-pill {
  background-color: var(--bg-panel-elevated);
  border: 1px solid var(--border-rule);
  padding: 0.45rem 0.8rem;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.spec-label {
  font-size: 0.72rem;
  color: var(--ink-muted);
}

.spec-value {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--navy-settlement);
}

/* Main container */
.ledger-main {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.5rem 1.75rem 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

.panel {
  background-color: var(--bg-panel);
  border: 1px solid var(--border-rule);
  border-top: 2px solid var(--ink-primary);
  padding: 1.25rem 1.35rem;
  border-radius: 2px;
}

.panel-header {
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-rule);
  padding-bottom: 0.65rem;
}

.panel-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 0.2rem;
  color: var(--ink-primary);
}

.panel-note {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 0.84rem;
}

/* Controls Grid */
.controls-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(190px, 1fr));
  gap: 1rem;
  margin-bottom: 1.1rem;
}

.control-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-primary);
}

.field-input {
  background-color: var(--bg-panel-elevated);
  border: 1px solid var(--border-rule);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  padding: 0.5rem 0.65rem;
  border-radius: 3px;
}

.field-input:focus {
  outline: 2px solid var(--navy-settlement);
  outline-offset: 1px;
}

.field-range {
  accent-color: var(--navy-settlement);
  cursor: pointer;
  margin-top: 0.35rem;
}

/* Mode Comparison Cards */
.mode-cards-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}

.mode-card {
  text-align: left;
  background-color: var(--bg-panel-elevated);
  border: 1px solid var(--border-rule);
  padding: 0.8rem 1rem;
  border-radius: 3px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.mode-card:hover {
  border-color: var(--navy-settlement);
}

.mode-card.active {
  border: 2px solid var(--navy-settlement);
  background-color: #FFFFFF;
}

.mode-card-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-secondary);
}

.mode-card-metric {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ink-primary);
}

.mode-card-meta {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
}

/* KPI Strip */
.kpi-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.kpi-card {
  background-color: var(--bg-panel);
  border: 1px solid var(--border-rule);
  border-left: 4px solid var(--navy-settlement);
  padding: 0.9rem 1.1rem;
}

.kpi-title {
  margin: 0 0 0.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-secondary);
}

.kpi-value {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 600;
  color: var(--ink-primary);
}

.kpi-value.kpi-positive {
  color: var(--green-authorized);
}

.kpi-sub {
  margin-top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
}

/* Two column layout */
.two-col-layout {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 1.35rem;
  align-items: start;
}

.sub-heading {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 600;
  margin: 1.15rem 0 0.55rem;
  color: var(--ink-primary);
}

/* Ledger Tables */
.table-wrap {
  overflow-x: auto;
  background-color: var(--bg-panel-elevated);
  border: 1px solid var(--border-rule);
}

.ledger-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.ledger-table th,
.ledger-table td {
  padding: 0.52rem 0.65rem;
  text-align: left;
  border-bottom: 1px solid var(--border-rule);
}

.ledger-table th {
  background-color: #E4DECFE8;
  font-weight: 600;
  color: var(--ink-primary);
  font-size: 0.77rem;
}

.ledger-table td.num,
.ledger-table th.num {
  font-family: var(--font-mono);
  text-align: right;
}

.compact-table th,
.compact-table td {
  padding: 0.4rem 0.55rem;
  font-size: 0.78rem;
}

.badge-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  font-weight: 600;
  padding: 0.12rem 0.42rem;
  border-radius: 3px;
}

.badge-green {
  background-color: rgba(27, 107, 80, 0.14);
  color: var(--green-authorized);
}

.badge-navy {
  background-color: rgba(27, 77, 142, 0.14);
  color: var(--navy-settlement);
}

.badge-vermilion {
  background-color: rgba(200, 75, 49, 0.15);
  color: var(--vermilion-rollback);
}

.badge-muted {
  background-color: rgba(108, 112, 117, 0.14);
  color: var(--ink-secondary);
}

/* Pareto Chart SVG */
.svg-container {
  background-color: var(--bg-panel-elevated);
  border: 1px solid var(--border-rule);
  padding: 0.5rem;
}

#svg-pareto-chart {
  width: 100%;
  height: auto;
  display: block;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
  font-size: 0.78rem;
  color: var(--ink-secondary);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

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

.swatch-pareto {
  background-color: var(--navy-settlement);
}

.swatch-selected {
  background-color: var(--green-authorized);
}

.swatch-dominated {
  background-color: #A09A90;
}

/* Saga Simulator */
.saga-controls {
  display: grid;
  grid-template-columns: 1.2fr 1fr auto;
  gap: 0.75rem;
  align-items: end;
  margin-bottom: 1rem;
}

.btn-primary {
  background-color: var(--navy-settlement);
  color: #FFFFFF;
  border: 1px solid var(--navy-settlement);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.84rem;
  padding: 0.52rem 0.95rem;
  border-radius: 3px;
  cursor: pointer;
}

.btn-primary:hover {
  background-color: #133B6E;
}

.saga-banner {
  background-color: var(--bg-panel-elevated);
  border: 1px solid var(--border-rule);
  border-left: 4px solid var(--green-authorized);
  padding: 0.8rem 1rem;
  margin-bottom: 0.95rem;
}

.saga-banner.fault-recovered {
  border-left-color: var(--navy-settlement);
}

.saga-banner.fault-rolledback {
  border-left-color: var(--vermilion-rollback);
}

.saga-banner-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.35rem;
}

.saga-status-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  background-color: rgba(27, 107, 80, 0.15);
  color: var(--green-authorized);
}

.saga-status-tag.tag-recovered {
  background-color: rgba(27, 77, 142, 0.15);
  color: var(--navy-settlement);
}

.saga-status-tag.tag-rolledback {
  background-color: rgba(200, 75, 49, 0.15);
  color: var(--vermilion-rollback);
}

.saga-delta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-secondary);
}

.saga-summary-text {
  margin: 0 0 0.45rem;
  font-size: 0.83rem;
  color: var(--ink-primary);
}

.saga-chain-hash {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  display: flex;
  gap: 0.4rem;
  align-items: center;
  overflow-x: auto;
}

.saga-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  max-height: 430px;
  overflow-y: auto;
}

.saga-step {
  background-color: var(--bg-panel-elevated);
  border: 1px solid var(--border-rule);
  border-left: 3px solid var(--navy-settlement);
  padding: 0.55rem 0.75rem;
}

.saga-step.step-captured {
  border-left-color: var(--green-authorized);
}

.saga-step.step-fault,
.saga-step.step-voided {
  border-left-color: var(--vermilion-rollback);
}

.saga-step-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-bottom: 0.2rem;
}

.saga-step-title {
  font-weight: 600;
  color: var(--ink-primary);
  font-size: 0.82rem;
}

.saga-step-detail {
  margin: 0.15rem 0 0.25rem;
  color: var(--ink-secondary);
  font-size: 0.79rem;
}

.saga-step-hash {
  font-family: var(--font-mono);
  font-size: 0.69rem;
  color: var(--ink-muted);
}

/* PayPal Payload Inspector */
.inspector-meta-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  background-color: var(--bg-panel-elevated);
  border: 1px solid var(--border-rule);
  padding: 0.65rem 0.8rem;
  margin-bottom: 0.75rem;
}

.inspector-kv {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.kv-label {
  font-size: 0.72rem;
  color: var(--ink-muted);
}

.kv-code {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-primary);
  word-break: break-all;
}

.kv-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--green-authorized);
}

.inspector-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.tab-btn {
  background-color: var(--bg-panel-elevated);
  border: 1px solid var(--border-rule);
  color: var(--ink-secondary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.42rem 0.8rem;
  cursor: pointer;
  border-radius: 3px;
}

.tab-btn.active {
  background-color: var(--navy-settlement);
  color: #FFFFFF;
  border-color: var(--navy-settlement);
}

.json-viewer {
  margin: 0;
  background-color: #181A1C;
  color: #EAE6DF;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.45;
  padding: 0.9rem 1rem;
  border-radius: 3px;
  max-height: 500px;
  overflow: auto;
}

/* Footer */
.ledger-footer {
  border-top: 1px solid var(--border-rule);
  background-color: var(--bg-panel);
  padding: 1rem 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
}

.footer-inner {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

@media (max-width: 1080px) {
  .controls-grid,
  .kpi-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .two-col-layout {
    grid-template-columns: 1fr;
  }
  .saga-controls {
    grid-template-columns: 1fr;
  }
}