:root {
  color-scheme: dark;
  --ink: #101418;
  --panel: #181d23;
  --panel-raised: #1d232a;
  --hairline: #272e36;
  --text: #e6eaee;
  --muted: #94a0ac;
  --group-a: #f2b134;
  --group-b: #4aa3df;
  --violation: #e05260;
  --ink-soft: rgba(16, 20, 24, 0.92);
  --text-faint: rgba(230, 234, 238, 0.08);
  --muted-faint: rgba(148, 160, 172, 0.12);
  --group-a-faint: rgba(242, 177, 52, 0.12);
  --group-b-faint: rgba(74, 163, 223, 0.12);
  --violation-faint: rgba(224, 82, 96, 0.12);
  --shadow: rgba(16, 20, 24, 0.55);
  --focus: var(--text);
  --max-width: 1360px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", "Cascadia Code", "Liberation Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
  background: var(--ink);
}

body {
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: var(--muted-faint);
}

a,
button,
input,
select,
summary {
  touch-action: manipulation;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--text);
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.1;
  text-wrap: balance;
}

h1 {
  max-width: 900px;
  font-size: clamp(2.45rem, 5vw, 5rem);
}

h2 {
  font-size: clamp(1.7rem, 3vw, 2.6rem);
}

h3 {
  font-size: 1.1rem;
}

p {
  margin-top: 0;
}

button,
select,
input {
  font: inherit;
}

button,
select {
  min-height: 44px;
}

button {
  border: 1px solid var(--hairline);
  border-radius: 4px;
  background: var(--text);
  color: var(--ink);
  cursor: pointer;
  font-weight: 500;
  padding: 0.65rem 1rem;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

button:hover {
  border-color: var(--muted);
  background: var(--muted);
}

button:disabled,
select:disabled,
input:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

button:active {
  background: var(--text);
}

select {
  width: 100%;
  border: 1px solid var(--hairline);
  border-radius: 4px;
  background-color: var(--ink);
  color: var(--text);
  padding: 0.55rem 2.25rem 0.55rem 0.75rem;
  cursor: pointer;
}

select.is-placeholder {
  color: var(--muted);
}

select option {
  background-color: var(--panel);
  color: var(--text);
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  transform: translateY(-160%);
  border-radius: 3px;
  background: var(--text);
  color: var(--ink);
  padding: 0.6rem 0.8rem;
  transition: transform 160ms ease;
}

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

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

.wrap {
  width: min(100%, var(--max-width));
  margin-inline: auto;
  padding-left: max(clamp(16px, 3vw, 36px), env(safe-area-inset-left));
  padding-right: max(clamp(16px, 3vw, 36px), env(safe-area-inset-right));
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid var(--hairline);
  background: var(--ink-soft);
  backdrop-filter: blur(12px);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 500;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 26px;
  height: 20px;
  gap: 4px;
}

.brand-mark i {
  display: block;
  width: 100%;
  height: 8px;
  border-radius: 1px;
  background: var(--group-a);
}

.brand-mark i:last-child {
  background: var(--group-b);
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(0.85rem, 2.5vw, 2rem);
}

nav a {
  color: var(--muted);
  font-size: 0.86rem;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.5fr);
  align-items: end;
  gap: clamp(2.5rem, 6vw, 6rem);
  padding-top: clamp(4rem, 8vw, 8rem);
  padding-bottom: clamp(3.5rem, 7vw, 7rem);
}

.eyebrow,
.kicker,
.panel-index,
.readout-label {
  margin-bottom: 0.75rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.lede {
  max-width: 780px;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.6;
  text-wrap: pretty;
}

.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0;
  border-top: 1px solid var(--hairline);
  border-left: 1px solid var(--hairline);
}

.hero-stats div {
  min-width: 0;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 1rem;
}

.hero-stats dt,
.summary-strip dt,
.constraint-readout dt,
.frontier-readout dt {
  color: var(--muted);
  font-size: 0.75rem;
}

.hero-stats dd,
.summary-strip dd,
.constraint-readout dd,
.frontier-readout dd {
  margin: 0.25rem 0 0;
  font-family: var(--mono);
  font-size: 1.02rem;
  font-variant-numeric: tabular-nums;
}

.audit-section {
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding-block: clamp(3rem, 6vw, 6rem);
  background: var(--panel);
}

.section-heading,
.panel-heading,
.footer-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
}

.section-heading {
  margin-bottom: 1.4rem;
}

.status-line,
.panel-heading > p {
  max-width: 500px;
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: right;
}

.panel {
  min-width: 0;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  background: var(--ink);
  box-shadow: 0 10px 32px var(--shadow);
  padding: clamp(1rem, 2.2vw, 1.5rem);
}

.controls {
  display: grid;
  grid-template-columns: minmax(200px, 1.2fr) minmax(190px, 1fr) minmax(190px, 1fr) minmax(220px, 0.9fr);
  align-items: end;
  gap: 1px;
  padding: 0;
  overflow: hidden;
  box-shadow: none;
}

.control,
.toggle-control {
  min-width: 0;
  min-height: 100px;
  border-right: 1px solid var(--hairline);
  padding: 1rem;
}

.controls > :last-child {
  border-right: 0;
}

.control > label,
.control-label label,
.toggle-control > span:first-child > span {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--muted);
  font-size: 0.78rem;
}

.control-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.control-label output {
  font-family: var(--mono);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

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

.toggle-control {
  display: flex;
  position: relative;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
}

.toggle-control small {
  display: block;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 400;
}

.toggle-control input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.toggle-track {
  position: relative;
  flex: 0 0 auto;
  width: 52px;
  height: 28px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: var(--panel);
  transition: background-color 160ms ease, border-color 160ms ease;
}

.toggle-track::after {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--muted);
  content: "";
  transition: transform 160ms ease, background-color 160ms ease;
}

.toggle-control input:checked + .toggle-track {
  border-color: var(--text);
  background: var(--text-faint);
}

.toggle-control input:checked + .toggle-track::after {
  transform: translateX(24px);
  background: var(--text);
}

.toggle-control input:focus-visible + .toggle-track {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.summary-strip {
  margin: 1px 0 1rem;
}

.summary-strip dl {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin: 0;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  background: var(--panel-raised);
}

.summary-strip dl div {
  min-width: 0;
  border-right: 1px solid var(--hairline);
  padding: 0.8rem 1rem;
}

.summary-strip dl div:last-child {
  border-right: 0;
}

.summary-strip dd {
  font-size: 1.2rem;
}

.panel-heading {
  align-items: flex-start;
  margin-bottom: 1rem;
}

.panel-index {
  margin-bottom: 0.4rem;
}

.table-panel {
  margin-bottom: 1rem;
}

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

th,
td {
  border-bottom: 1px solid var(--hairline);
  padding: 0.68rem 0.75rem;
  text-align: right;
}

th {
  color: var(--muted);
  font-weight: 500;
}

th:first-child,
td:first-child,
.criteria-table-wrap th:nth-child(2),
.criteria-table-wrap td:nth-child(2),
.tradeoff-table th,
.tradeoff-table td {
  text-align: left;
}

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

.group-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
}

.group-label::before {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--group-a);
  content: "";
}

.group-label.group-b::before {
  background: var(--group-b);
}

.group-label.overall::before {
  border: 1px solid var(--muted);
  background: transparent;
}

.dashboard-grid {
  display: grid;
  gap: 1rem;
  margin-bottom: 1rem;
}

.dashboard-grid-main {
  grid-template-columns: minmax(0, 1.35fr) minmax(340px, 0.65fr);
}

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

.chart-wrap {
  min-width: 0;
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.frontier-chart-col {
  min-width: 0;
}

.chart {
  display: block;
  width: 100%;
  height: auto;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
}

.chart text {
  fill: currentColor;
}

.chart .axis,
.chart .grid-line {
  stroke: var(--hairline);
  vector-effect: non-scaling-stroke;
}

.chart .guide {
  stroke: var(--muted);
  stroke-dasharray: 4 5;
  opacity: 0.55;
  vector-effect: non-scaling-stroke;
}

.chart .group-a-line,
.chart .group-b-line,
.chart .frontier-line {
  fill: none;
  stroke-width: 2.5;
  vector-effect: non-scaling-stroke;
}

.chart .group-a-line {
  stroke: var(--group-a);
}

.chart .group-b-line {
  stroke: var(--group-b);
}

.chart .frontier-line {
  stroke: var(--text);
}

.chart .group-a-point {
  fill: var(--group-a);
}

.chart .group-b-point {
  fill: var(--group-b);
}

.chart .frontier-point,
.chart .frontier-hit {
  transform-box: fill-box;
  transform-origin: center;
}

.chart .frontier-point {
  fill: var(--text);
  stroke: var(--ink);
  stroke-width: 2;
  pointer-events: none;
}

.chart .frontier-hit {
  fill: transparent;
  cursor: grab;
}

.chart .frontier-hit:active {
  cursor: grabbing;
}

.chart .frontier-hit:focus-visible {
  outline: none;
  stroke: var(--focus);
  stroke-width: 2;
}

.chart .fail-bar {
  fill: var(--violation);
}

.chart .pass-bar {
  fill: var(--muted);
}

.chart .di-bar {
  fill: var(--text);
}

.criteria-table-wrap {
  margin-top: 0.75rem;
}

.criteria-table-wrap td:nth-child(2) {
  max-width: 270px;
  color: var(--muted);
  white-space: normal;
}

.status-badge {
  display: inline-block;
  min-width: 52px;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.7rem;
  text-align: center;
}

.status-badge.fail {
  border-color: var(--violation);
  background: var(--violation-faint);
  color: var(--violation);
}

.impossibility-lede {
  border-left: 2px solid var(--violation);
  margin-bottom: 1rem;
  padding-left: 0.9rem;
  color: var(--muted);
}

.constraint-readout,
.frontier-readout dl {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0 0 1rem;
  border-top: 1px solid var(--hairline);
  border-left: 1px solid var(--hairline);
}

.constraint-readout div,
.frontier-readout dl div {
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 0.75rem;
}

.tradeoff-table {
  white-space: normal;
}

.tradeoff-table th,
.tradeoff-table td {
  vertical-align: top;
}

.tradeoff-table td:nth-child(2) {
  color: var(--muted);
}

.tradeoff-table td:last-child {
  color: var(--violation);
}

.fine-print {
  margin: 0.8rem 0 0;
  color: var(--muted);
  font-size: 0.75rem;
}

details {
  margin-top: 0.8rem;
  border-top: 1px solid var(--hairline);
}

summary {
  min-height: 44px;
  padding-top: 0.75rem;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.78rem;
}

details[open] summary {
  color: var(--text);
}

.frontier-panel {
  margin-top: 1rem;
}

.frontier-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.5fr);
  gap: clamp(1rem, 3vw, 2rem);
  align-items: start;
}

.frontier-range {
  width: 100%;
}

.frontier-readout {
  border-left: 1px solid var(--hairline);
  padding-left: clamp(1rem, 3vw, 2rem);
}

.frontier-readout dl {
  grid-template-columns: 1fr;
}

.frontier-readout dd {
  font-size: 1.15rem;
}

.frontier-readout .group-a {
  background: var(--group-a-faint);
}

.frontier-readout .group-a dt,
.frontier-readout .group-a dd {
  color: var(--group-a);
}

.frontier-readout .group-b {
  background: var(--group-b-faint);
}

.frontier-readout .group-b dt,
.frontier-readout .group-b dd {
  color: var(--group-b);
}

.frontier-readout button {
  width: 100%;
}

.info-section {
  padding-block: clamp(4rem, 8vw, 7rem);
  scroll-margin-top: 64px;
}

section[id] {
  scroll-margin-top: 76px;
}

.info-alt {
  border-block: 1px solid var(--hairline);
  background: var(--panel);
}

.prose-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.65fr) minmax(0, 1.35fr);
  gap: clamp(2rem, 7vw, 8rem);
}

.definition-list {
  margin: 0;
}

.definition-list div {
  display: grid;
  grid-template-columns: minmax(150px, 0.35fr) minmax(0, 1fr);
  gap: 1rem;
  border-top: 1px solid var(--hairline);
  padding-block: 1rem;
}

.definition-list dt {
  font-weight: 500;
}

.definition-list dd {
  margin: 0;
  color: var(--muted);
}

.prose {
  max-width: 760px;
  color: var(--muted);
}

.limitations-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.limitations-list li {
  border-top: 1px solid var(--hairline);
  padding: 1rem 1.5rem 1rem 1.2rem;
  color: var(--muted);
}

.limitations-list li::before {
  content: "•";
  margin-left: -1rem;
  padding-right: 0.7rem;
  color: var(--text);
}

footer {
  padding-block: 1.5rem;
}

.footer-row {
  color: var(--muted);
  font-size: 0.78rem;
}

.footer-row a {
  color: var(--text);
}

@media (max-width: 1050px) {
  .hero,
  .dashboard-grid-main,
  .frontier-layout,
  .prose-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    align-items: start;
  }

  .hero-stats {
    max-width: 620px;
  }

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

  .control:nth-child(2) {
    border-right: 0;
  }

  .control,
  .toggle-control {
    border-bottom: 1px solid var(--hairline);
  }

  .toggle-control {
    border-right: 0;
  }

  .frontier-readout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(180px, 0.4fr);
    gap: 1rem;
    border-top: 1px solid var(--hairline);
    border-left: 0;
    padding: 1rem 0 0;
  }

  .frontier-readout .readout-label {
    grid-column: 1 / -1;
    margin: 0;
  }

  .frontier-readout dl {
    grid-template-columns: repeat(5, 1fr);
    margin: 0;
  }
}

@media (max-width: 760px) {
  nav a:not(:first-child) {
    display: none;
  }

  .hero {
    padding-top: 4rem;
  }

  .controls,
  .chart-grid,
  .summary-strip dl,
  .limitations-list,
  .frontier-readout,
  .frontier-readout dl {
    grid-template-columns: 1fr;
  }

  .control,
  .toggle-control,
  .controls > :last-child,
  .summary-strip dl div {
    border-right: 0;
    border-bottom: 1px solid var(--hairline);
  }

  .controls > :last-child,
  .summary-strip dl div:last-child {
    border-bottom: 0;
  }

  .control,
  .toggle-control {
    min-height: auto;
  }

  .section-heading,
  .panel-heading,
  .footer-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .status-line,
  .panel-heading > p {
    text-align: left;
  }

  .definition-list div {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .footer-row {
    gap: 0.4rem;
  }

  .fairness-chart,
  .frontier-chart-wrap .chart {
    min-width: 620px;
  }

  .chart-grid .chart {
    min-width: 480px;
  }
}

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

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