:root {
  --ink-strong: #102a43;
  --ink: #243b53;
  --ink-muted: #52667a;
  --surface: #ffffff;
  --surface-subtle: #f5f8fb;
  --surface-raised: #fbfdff;
  --border: #cbd6e2;
  --border-strong: #91a4b7;
  --brand: #0b5e75;
  --brand-dark: #08475a;
  --brand-soft: #e8f4f6;
  --success: #17643a;
  --success-soft: #eaf7ef;
  --warning: #8a4b08;
  --warning-soft: #fff4dd;
  --danger: #a12828;
  --danger-soft: #fff0f0;
  --neutral: #66788a;
  --focus: #006fcc;
  --shadow: 0 10px 28px rgb(16 42 67 / 8%);
  --radius-large: 14px;
  --radius: 9px;
  --content-width: 1240px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: #eaf0f5;
  font-synthesis: none;
  line-height: 1.5;
}

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

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(180deg, #f8fbfd 0, #f8fbfd 380px, #eaf0f5 760px),
    #eaf0f5;
  color: var(--ink);
}

button,
select,
input {
  font: inherit;
}

button,
select,
input[type="range"],
summary {
  touch-action: manipulation;
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
summary:focus-visible,
a:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

[hidden] {
  display: none !important;
}

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  transform: translateY(-160%);
  padding: 10px 14px;
  border-radius: 6px;
  background: var(--ink-strong);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  border-bottom: 1px solid #d7e1ea;
  background: rgb(255 255 255 / 94%);
  box-shadow: 0 1px 0 rgb(16 42 67 / 3%);
}

.header-inner {
  display: flex;
  width: min(calc(100% - 40px), var(--content-width));
  min-height: 74px;
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-strong);
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 2px solid var(--brand);
  border-radius: 7px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 0.98rem;
  letter-spacing: 0.01em;
}

.brand small {
  margin-top: 1px;
  color: var(--ink-muted);
  font-size: 0.76rem;
}

.environment-badge,
.small-badge,
.state-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-subtle);
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.2;
}

.environment-badge {
  padding: 8px 11px;
}

.environment-badge span {
  color: var(--brand);
}

.page-shell {
  width: min(calc(100% - 40px), var(--content-width));
  margin: 0 auto;
  padding: 54px 0 70px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(340px, 0.75fr);
  gap: 42px;
  align-items: center;
  margin-bottom: 42px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 7px;
  color: var(--brand-dark);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 780px;
  margin: 0;
  color: var(--ink-strong);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 760;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

h2 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 1.18rem;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.hero-copy {
  max-width: 780px;
  margin: 18px 0 0;
  color: var(--ink-muted);
  font-size: 1.05rem;
}

.scope-notice {
  display: flex;
  gap: 13px;
  padding: 19px;
  border: 1px solid #9bc6d2;
  border-left: 4px solid var(--brand);
  border-radius: var(--radius);
  background: var(--brand-soft);
}

.scope-notice h2 {
  font-size: 0.94rem;
}

.scope-notice p {
  margin: 5px 0 0;
  color: #2c4b58;
  font-size: 0.84rem;
}

.scope-icon {
  display: grid;
  flex: 0 0 auto;
  width: 23px;
  height: 23px;
  place-items: center;
  border-radius: 50%;
  background: var(--brand-dark);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
}

.control-panel,
.panel,
.kpi-card,
.empty-state {
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.control-panel {
  padding: 26px;
}

.control-heading,
.panel-heading,
.results-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.control-grid {
  display: grid;
  grid-template-columns: minmax(250px, 1fr) auto;
  gap: 28px;
  align-items: end;
  margin-top: 24px;
}

.field label {
  display: block;
  margin-bottom: 7px;
  color: var(--ink-strong);
  font-size: 0.84rem;
  font-weight: 750;
}

select {
  width: 100%;
  min-height: 46px;
  padding: 0 40px 0 12px;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background-color: #fff;
  color: var(--ink-strong);
  cursor: pointer;
}

select:disabled {
  background: var(--surface-subtle);
  color: var(--ink-muted);
  cursor: not-allowed;
}

.field-help {
  margin: 7px 0 0;
  color: var(--ink-muted);
  font-size: 0.75rem;
}

.run-actions {
  display: grid;
  grid-template-columns: max-content max-content;
  gap: 10px;
  align-items: start;
}

.run-actions .field-help {
  grid-column: 1 / -1;
  max-width: 410px;
}

.compare-grid {
  display: grid;
  grid-template-columns: minmax(200px, 1fr) minmax(200px, 1fr) auto;
  gap: 16px 28px;
  align-items: end;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid #e1e8ef;
}

.compare-title {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--ink-strong);
  font-size: 0.94rem;
  letter-spacing: -0.01em;
}

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-size: 0.82rem;
  font-weight: 750;
  line-height: 1.2;
  cursor: pointer;
}

.button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.button:active:not(:disabled) {
  transform: translateY(0);
}

.button:disabled {
  opacity: 0.53;
  cursor: not-allowed;
}

.button-primary {
  border-color: var(--brand-dark);
  background: var(--brand-dark);
  color: #fff;
}

.button-primary:hover:not(:disabled) {
  background: #06394a;
}

.button-secondary,
.button-quiet {
  border-color: var(--border-strong);
  background: #fff;
  color: var(--ink-strong);
}

.button-secondary:hover:not(:disabled),
.button-quiet:hover:not(:disabled) {
  border-color: var(--brand);
  background: var(--brand-soft);
}

.button-quiet {
  min-height: 36px;
  padding: 7px 11px;
  font-size: 0.77rem;
}

.status-panel {
  display: flex;
  gap: 12px;
  margin-top: 22px;
  padding: 13px 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-subtle);
}

.status-symbol {
  display: grid;
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  place-items: center;
  border-radius: 50%;
  background: var(--neutral);
  color: #fff;
  font-size: 0.76rem;
  font-weight: 900;
}

.status-panel strong {
  color: var(--ink-strong);
  font-size: 0.84rem;
}

.status-panel p {
  margin: 2px 0 0;
  color: var(--ink-muted);
  font-size: 0.78rem;
}

.status-success {
  border-color: #acd6bd;
  background: var(--success-soft);
}

.status-success .status-symbol {
  background: var(--success);
}

.status-warning {
  border-color: #e8c47a;
  background: var(--warning-soft);
}

.status-warning .status-symbol {
  background: var(--warning);
}

.status-error {
  border-color: #e0a6a6;
  background: var(--danger-soft);
}

.status-error .status-symbol {
  background: var(--danger);
}

.status-loading .status-symbol {
  background: var(--brand);
}

.empty-state {
  margin-top: 28px;
  padding: 58px 24px;
  text-align: center;
}

.empty-state h2 {
  margin-top: 20px;
}

.empty-state p {
  max-width: 580px;
  margin: 8px auto 0;
  color: var(--ink-muted);
  font-size: 0.89rem;
}

.empty-diagram {
  display: flex;
  max-width: 390px;
  margin: 0 auto;
  align-items: center;
  justify-content: center;
  color: var(--border-strong);
}

.empty-diagram span,
.empty-diagram b {
  display: grid;
  height: 48px;
  place-items: center;
  border: 2px solid currentcolor;
  border-radius: 7px;
}

.empty-diagram span {
  width: 48px;
}

.empty-diagram b {
  width: 80px;
  font-size: 0.68rem;
}

.empty-diagram i {
  width: 72px;
  height: 2px;
  background: currentcolor;
}

.results {
  margin-top: 42px;
}

.results-heading {
  align-items: end;
  margin-bottom: 18px;
}

.result-summary {
  margin: 6px 0 0;
  color: var(--ink-muted);
  font-size: 0.86rem;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 9px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.kpi-card {
  min-width: 0;
  padding: 18px;
  box-shadow: 0 6px 18px rgb(16 42 67 / 5%);
}

.kpi-card::before {
  display: block;
  width: 30px;
  height: 3px;
  margin-bottom: 14px;
  border-radius: 4px;
  background: var(--brand);
  content: "";
}

.kpi-alert::before {
  background: var(--danger);
}

.kpi-label {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.71rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.kpi-value {
  margin: 6px 0 3px;
  color: var(--ink-strong);
  font-size: clamp(1.28rem, 2vw, 1.72rem);
  font-variant-numeric: tabular-nums;
  font-weight: 760;
  letter-spacing: -0.025em;
  line-height: 1.25;
}

.kpi-value-text {
  font-size: 1.28rem;
}

.kpi-context {
  min-height: 34px;
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.7rem;
}

.explanation {
  margin-top: 13px;
  border-top: 1px solid #e5ebf0;
  padding-top: 10px;
}

.explanation summary {
  color: var(--brand-dark);
  font-size: 0.72rem;
  font-weight: 750;
  cursor: pointer;
}

.explanation p {
  margin: 7px 0 0;
  color: var(--ink-muted);
  font-size: 0.72rem;
}

.panel {
  margin-top: 18px;
  padding: 23px;
}

.panel-heading {
  align-items: center;
}

.panel-heading output {
  color: var(--ink-strong);
  font-size: 0.83rem;
  font-variant-numeric: tabular-nums;
  font-weight: 750;
}

.timeline-panel input[type="range"] {
  width: 100%;
  height: 30px;
  margin: 24px 0 0;
  accent-color: var(--brand);
  cursor: pointer;
}

.timeline-panel input[type="range"]:disabled {
  cursor: not-allowed;
}

.timeline-axis {
  display: flex;
  justify-content: space-between;
  margin-top: -2px;
  color: var(--ink-muted);
  font-size: 0.68rem;
}

.timeline-state {
  margin-top: 16px;
  padding: 12px 14px;
  border-left: 3px solid var(--brand);
  border-radius: 0 6px 6px 0;
  background: var(--surface-subtle);
  color: var(--ink);
  font-size: 0.8rem;
}

.two-column-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(310px, 0.75fr);
  gap: 18px;
}

.two-column-layout > .panel {
  min-width: 0;
}

.small-badge,
.state-badge {
  flex: 0 0 auto;
  padding: 6px 9px;
}

.state-available {
  border-color: #9bc7aa;
  background: var(--success-soft);
  color: var(--success);
}

.state-constrained {
  border-color: #e4bf70;
  background: var(--warning-soft);
  color: var(--warning);
}

.state-unavailable {
  border-color: #e0a6a6;
  background: var(--danger-soft);
  color: var(--danger);
}

.state-unknown {
  color: var(--neutral);
}

.topology-frame {
  margin-top: 20px;
  overflow: hidden;
  border: 1px solid #dbe4ec;
  border-radius: var(--radius);
  background:
    linear-gradient(#edf2f6 1px, transparent 1px),
    linear-gradient(90deg, #edf2f6 1px, transparent 1px),
    #fbfdff;
  background-size: 24px 24px;
}

#topology-diagram {
  display: block;
  width: 100%;
  height: auto;
  min-height: 260px;
}

.topology-edge {
  fill: none;
  stroke: var(--neutral);
  stroke-width: 5;
}

.topology-edge.is-available {
  stroke: var(--success);
}

.topology-edge.is-constrained {
  stroke: var(--warning);
  stroke-dasharray: 10 7;
}

.topology-edge.is-unavailable {
  stroke: var(--danger);
  stroke-dasharray: 5 7;
}

.topology-node {
  fill: #fff;
  stroke: var(--border-strong);
  stroke-width: 2;
}

.topology-node.is-available {
  fill: var(--success-soft);
  stroke: var(--success);
}

.topology-node.is-constrained {
  fill: var(--warning-soft);
  stroke: var(--warning);
}

.topology-node.is-unavailable {
  fill: var(--danger-soft);
  stroke: var(--danger);
}

.topology-label {
  fill: var(--ink-strong);
  font-family: inherit;
  font-size: 16px;
  font-weight: 750;
  text-anchor: middle;
}

.topology-detail {
  fill: var(--ink-muted);
  font-family: inherit;
  font-size: 13px;
  text-anchor: middle;
}

.topology-symbol {
  fill: var(--ink-strong);
  font-family: inherit;
  font-size: 17px;
  font-weight: 800;
  text-anchor: middle;
}

.panel-note {
  margin: 13px 0 0;
  color: var(--ink-muted);
  font-size: 0.72rem;
}

.load-chart {
  margin-top: 28px;
}

.chart-track {
  display: flex;
  width: 100%;
  height: 34px;
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: repeating-linear-gradient(
    135deg,
    #edf2f6,
    #edf2f6 6px,
    #e4eaf0 6px,
    #e4eaf0 12px
  );
}

.chart-segment {
  width: 0;
  min-width: 0;
  transition: width 180ms ease-out;
}

.served-bar {
  background: var(--success);
}

.unserved-bar {
  background: var(--danger);
}

.chart-legend {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 9px 14px;
  align-items: center;
  margin-top: 17px;
  font-size: 0.78rem;
}

.chart-legend span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-muted);
}

.chart-legend strong {
  color: var(--ink-strong);
  font-variant-numeric: tabular-nums;
}

.legend-key {
  display: inline-block;
  width: 11px;
  height: 11px;
  border-radius: 2px;
}

.served-key {
  background: var(--success);
}

.unserved-key {
  background: var(--danger);
}

.demand-key {
  border: 2px solid var(--neutral);
  background: #fff;
}

.ups-card {
  margin-top: 28px;
  padding-top: 23px;
  border-top: 1px solid #e1e8ef;
}

.ups-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
}

.ups-value {
  margin: 4px 0 0;
  color: var(--ink-strong);
  font-size: 1.4rem;
  font-variant-numeric: tabular-nums;
  font-weight: 760;
}

.ups-meter {
  height: 10px;
  margin-top: 16px;
  overflow: hidden;
  border-radius: 999px;
  background: #dce5ed;
}

.ups-meter span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--brand);
  transition: width 180ms ease-out;
}

.table-scroll {
  margin-top: 18px;
  overflow-x: auto;
  border: 1px solid #dce4eb;
  border-radius: 8px;
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: 0.78rem;
}

th,
td {
  padding: 11px 13px;
  border-bottom: 1px solid #e1e8ee;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface-subtle);
  color: var(--ink-strong);
  font-size: 0.69rem;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr.is-future {
  color: var(--ink-muted);
  background: #fafcfd;
}

tbody tr.is-current {
  background: var(--brand-soft);
  box-shadow: inset 3px 0 var(--brand);
}

tbody tr.is-divergent {
  background: var(--warning-soft);
  box-shadow: inset 3px 0 var(--warning);
}

.comparison-table {
  min-width: 560px;
}

.comparison-table th[scope="row"] {
  background: transparent;
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: normal;
  text-transform: none;
}

.comparison-table td {
  font-variant-numeric: tabular-nums;
}

.record-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  font-weight: 750;
}

.record-badge::before {
  content: "—";
}

.record-info::before,
.record-transition::before {
  color: var(--brand);
  content: "◆";
}

.record-warning::before {
  color: var(--warning);
  content: "!";
}

.record-critical::before,
.record-error::before {
  color: var(--danger);
  content: "×";
}

.record-ok::before,
.record-cleared::before {
  color: var(--success);
  content: "✓";
}

.inline-empty {
  margin: 18px 0 0;
  color: var(--ink-muted);
  font-size: 0.82rem;
}

.provenance-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 18px 0 0;
  overflow: hidden;
  border: 1px solid #dce4eb;
  border-radius: 8px;
  background: #dce4eb;
}

.provenance-grid div {
  min-width: 0;
  padding: 12px 14px;
  background: #fff;
}

.provenance-grid div:nth-child(3) {
  grid-column: 1 / -1;
}

.provenance-grid dt {
  color: var(--ink-muted);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.provenance-grid dd {
  margin: 4px 0 0;
  overflow-wrap: anywhere;
  color: var(--ink-strong);
  font-family: ui-monospace, "Cascadia Mono", "Segoe UI Mono", Consolas, monospace;
  font-size: 0.75rem;
}

.site-footer {
  padding: 24px 20px 38px;
  color: var(--ink-muted);
  font-size: 0.73rem;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 1080px) {
  .kpi-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .two-column-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .control-grid,
  .compare-grid {
    grid-template-columns: 1fr;
  }

  .run-actions {
    justify-content: start;
  }

  .kpi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .header-inner,
  .page-shell {
    width: min(calc(100% - 24px), var(--content-width));
  }

  .header-inner {
    min-height: 68px;
  }

  .environment-badge {
    display: none;
  }

  .page-shell {
    padding-top: 34px;
  }

  .hero {
    margin-bottom: 28px;
  }

  h1 {
    font-size: 2rem;
  }

  .control-panel,
  .panel {
    padding: 18px;
  }

  .control-heading,
  .panel-heading,
  .results-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .run-actions {
    width: 100%;
    grid-template-columns: 1fr;
  }

  .run-actions .field-help {
    grid-column: 1;
  }

  .button {
    width: 100%;
  }

  .button-quiet {
    width: auto;
  }

  .download-actions {
    width: 100%;
    justify-content: stretch;
  }

  .download-actions .button {
    flex: 1 1 150px;
  }

  .kpi-grid {
    grid-template-columns: 1fr;
  }

  .kpi-context {
    min-height: 0;
  }

  .panel-heading .state-badge,
  .panel-heading .small-badge {
    align-self: flex-start;
  }

  .provenance-grid {
    grid-template-columns: 1fr;
  }

  .provenance-grid div:nth-child(3) {
    grid-column: auto;
  }

  .scope-notice {
    padding: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (prefers-contrast: more) {
  :root {
    --ink-strong: #001322;
    --ink: #10202e;
    --ink-muted: #304353;
    --border: #697b8a;
    --border-strong: #405365;
    --brand: #004e65;
  }

  .control-panel,
  .panel,
  .kpi-card,
  .empty-state {
    border-width: 2px;
  }
}

@media (forced-colors: active) {
  .button,
  .status-symbol,
  .scope-icon,
  .brand-mark,
  .environment-badge,
  .small-badge,
  .state-badge,
  .legend-key,
  .topology-node,
  .topology-edge {
    forced-color-adjust: auto;
  }

  .chart-segment,
  .ups-meter span {
    border: 2px solid CanvasText;
  }

  .served-bar {
    border-style: solid;
  }

  .unserved-bar {
    border-style: dashed;
  }
}

@media print {
  body {
    background: #fff;
  }

  .site-header,
  .control-panel,
  .download-actions,
  .site-footer,
  .skip-link {
    display: none;
  }

  .page-shell {
    width: 100%;
    padding: 0;
  }

  .hero {
    display: block;
  }

  .scope-notice,
  .panel,
  .kpi-card {
    break-inside: avoid;
    box-shadow: none;
  }
}