:root {
  --black: #0b0b0d;
  --panel: #141417;
  --panel-raised: #19191d;
  --hairline: #26262b;
  --hairline-strong: #3a3a41;
  --text: #ececef;
  --muted: #a7a7b0;
  --muted-low: #8e8e97;
  --pass: #4fd18b;
  --pass-bg: #10251a;
  --fail: #ff4d6d;
  --fail-bg: #2b1118;
  --warn: #f0a33c;
  --warn-bg: #2a1d0d;
  --focus: #f5c266;
  --field: #0f0f12;
  --button-text: #07150d;
  --selection: #264a37;
  --tap: transparent;
  --max-width: 1440px;
  --radius: 5px;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--black);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--selection);
  color: var(--text);
}

a {
  color: inherit;
  text-underline-offset: 3px;
  touch-action: manipulation;
  -webkit-tap-highlight-color: var(--tap);
}

button,
input,
select {
  font: inherit;
}

button,
select {
  cursor: pointer;
}

button:disabled,
select:disabled,
input:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

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

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.15;
  text-wrap: balance;
}

h1 {
  max-width: 820px;
  margin-bottom: 20px;
  font-size: clamp(2.2rem, 6vw, 5.25rem);
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.65rem, 3vw, 2.5rem);
}

h3 {
  font-size: 1rem;
}

h4 {
  margin-bottom: 8px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

code,
pre,
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

code {
  color: var(--warn);
}

pre {
  max-width: 100%;
  margin: 0;
  overflow: auto;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.shell {
  width: min(100% - 40px, var(--max-width));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 12px;
  transform: translateY(-160%);
  border: 1px solid var(--focus);
  background: var(--black);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--hairline);
  background: var(--black);
}

.header-row,
.footer-row {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid var(--pass);
  border-radius: 4px;
  color: var(--pass);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

nav a {
  color: var(--muted);
  font-size: 0.83rem;
  text-decoration: none;
}

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

.hero {
  min-height: 520px;
  padding-block: 88px 56px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  align-items: end;
  gap: 56px;
  scroll-margin-top: 56px;
}

.eyebrow,
.section-index,
.panel-kicker,
.score-label {
  color: var(--pass);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-copy {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
}

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

.hero-stats div {
  min-height: 112px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.hero-stats dt {
  color: var(--muted-low);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-variant-numeric: tabular-nums;
}

.section {
  padding-block: 72px;
  scroll-margin-top: 56px;
}

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

.section-heading {
  margin-bottom: 28px;
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(300px, 1fr);
  align-items: end;
  gap: 48px;
}

.section-heading p {
  max-width: 780px;
  margin-bottom: 0;
  color: var(--muted);
}

.section-heading .section-index {
  margin-bottom: 8px;
  color: var(--pass);
}

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

.run-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 16px;
}

.run-form {
  padding: 22px;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.field {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.field label {
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.field-hint {
  min-height: 2.8em;
  color: var(--muted-low);
  font-size: 0.76rem;
  font-weight: 400;
}

input,
select {
  width: 100%;
  min-height: 42px;
  padding: 9px 11px;
  border: 1px solid var(--hairline-strong);
  border-radius: 4px;
  background: var(--field);
  color: var(--text);
}

input::placeholder {
  color: var(--muted-low);
}

input:focus,
select:focus {
  border-color: var(--focus);
}

.button-row,
.results-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.button-row {
  margin-top: 20px;
}

.button {
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid var(--hairline-strong);
  border-radius: 4px;
  background: var(--field);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 500;
  touch-action: manipulation;
  -webkit-tap-highlight-color: var(--tap);
}

.button:hover:not(:disabled) {
  border-color: var(--text);
}

.button-primary {
  border-color: var(--pass);
  background: var(--pass);
  color: var(--button-text);
}

.button-primary:hover:not(:disabled) {
  border-color: var(--text);
}

.button:active:not(:disabled) {
  background: var(--hairline);
}

.button-primary:active:not(:disabled) {
  background: var(--pass-bg);
  color: var(--pass);
}

.button-danger {
  border-color: var(--fail);
  color: var(--fail);
}

.button-secondary {
  background: transparent;
}

.run-monitor {
  padding: 22px;
  background: var(--panel-raised);
}

.panel-kicker {
  margin-bottom: 8px;
}

.counter {
  margin: 26px 0 12px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-variant-numeric: tabular-nums;
}

.run-status {
  min-height: 4.7em;
  color: var(--muted);
  font-size: 0.84rem;
  overflow-wrap: anywhere;
}

.status-error {
  color: var(--fail);
}

.constraint-list {
  margin: 20px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--hairline);
  list-style: none;
}

.constraint-list li {
  padding-block: 4px;
  color: var(--muted-low);
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

.constraint-list li::before {
  content: "[+] ";
  color: var(--pass);
}

.fixture-strip {
  margin-top: 16px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border: 1px solid var(--warn);
  border-radius: var(--radius);
  background: var(--warn-bg);
}

.fixture-strip p {
  margin-bottom: 0;
  color: var(--muted);
}

.fixture-strip > div {
  min-width: 0;
}

.fixture-strip .fixture-title {
  margin-bottom: 4px;
  color: var(--warn);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.weight-panel {
  margin-bottom: 18px;
  padding: 18px;
  background: var(--black);
}

.weight-panel h3 {
  margin-bottom: 14px;
}

.weight-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(105px, 1fr));
  gap: 8px;
}

.weight-field {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.72rem;
}

.weight-field input {
  min-height: 38px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.empty-score {
  min-height: 210px;
  padding: 36px;
  display: grid;
  align-content: center;
  border: 1px dashed var(--hairline-strong);
  border-radius: var(--radius);
}

.empty-score p {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
}

.empty-score .empty-title {
  margin-bottom: 6px;
  color: var(--text);
  font-family: var(--font-mono);
}

.score-overview {
  margin-bottom: 18px;
  display: grid;
  grid-template-columns: 320px 1fr;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--black);
}

.score-block {
  padding: 24px;
  border-right: 1px solid var(--hairline);
}

.score-block strong {
  margin-top: 8px;
  display: block;
  color: var(--pass);
  font-family: var(--font-mono);
  font-size: 3rem;
  font-variant-numeric: tabular-nums;
}

.score-block small {
  color: var(--muted-low);
  font-size: 1rem;
}

.score-meta {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.score-meta div {
  padding: 24px;
  border-right: 1px solid var(--hairline);
}

.score-meta div:last-child {
  border-right: 0;
}

.score-meta dt {
  color: var(--muted-low);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.score-meta dd {
  margin: 12px 0 0;
  overflow-wrap: anywhere;
}

.score-tables {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 16px;
}

.table-wrap {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.79rem;
}

caption {
  padding: 13px 14px;
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 500;
  text-align: left;
}

th,
td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--hairline);
  text-align: left;
  vertical-align: top;
}

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

thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--field);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.metric-definition {
  color: var(--muted-low);
}

.results-actions {
  justify-content: flex-end;
}

.run-label {
  max-width: 500px;
  padding: 7px 9px;
  border: 1px solid var(--hairline-strong);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.35;
}

.fixture-label {
  border-color: var(--warn);
  background: var(--warn-bg);
  color: var(--warn);
}

.live-label {
  border-color: var(--pass);
  background: var(--pass-bg);
  color: var(--pass);
}

.results-table {
  min-width: 980px;
}

.suite-table {
  min-width: 1180px;
}

.results-table tbody tr:not(.result-detail):hover,
.suite-table tbody tr:hover {
  background: var(--panel-raised);
}

.verdict,
.category {
  display: inline-block;
  padding: 3px 6px;
  border: 1px solid currentColor;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.verdict-pass {
  background: var(--pass-bg);
  color: var(--pass);
}

.verdict-fail {
  background: var(--fail-bg);
  color: var(--fail);
}

.verdict-partial {
  background: var(--warn-bg);
  color: var(--warn);
}

.category {
  border-color: var(--hairline-strong);
  color: var(--muted);
}

.prompt-cell {
  min-width: 300px;
  max-width: 520px;
}

.tool-list {
  min-width: 190px;
  color: var(--warn);
  overflow-wrap: anywhere;
}

.expected-cell {
  min-width: 300px;
  color: var(--muted);
}

.calls-cell {
  min-width: 150px;
  color: var(--warn);
}

.reason-cell {
  min-width: 300px;
  color: var(--muted);
}

.text-button {
  min-height: 32px;
  padding: 4px 7px;
  border: 1px solid var(--hairline-strong);
  border-radius: 3px;
  background: transparent;
  color: var(--text);
  font-size: 0.72rem;
  touch-action: manipulation;
  -webkit-tap-highlight-color: var(--tap);
}

.text-button:hover,
.text-button:active {
  border-color: var(--text);
  background: var(--hairline);
}

.result-detail td {
  padding: 0;
  background: var(--field);
}

.detail-grid {
  padding: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.detail-grid section {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--hairline);
  border-radius: 4px;
  background: var(--black);
}

.detail-grid section:last-child {
  grid-column: 1 / -1;
}

.grader-reason {
  margin-bottom: 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.schema-list {
  border-top: 1px solid var(--hairline);
}

.schema-item {
  border-bottom: 1px solid var(--hairline);
}

.schema-item summary {
  padding: 16px 8px;
  display: grid;
  grid-template-columns: minmax(180px, 0.35fr) 1fr;
  gap: 24px;
  align-items: baseline;
  color: var(--muted);
  list-style-position: outside;
  touch-action: manipulation;
  -webkit-tap-highlight-color: var(--tap);
}

.schema-item summary:hover {
  color: var(--text);
  background: var(--panel-raised);
}

.schema-item summary code {
  color: var(--pass);
}

.schema-item pre {
  margin: 0 0 16px;
  padding: 16px;
  border: 1px solid var(--hairline);
  border-radius: 4px;
  background: var(--field);
}

.method-grid,
.limitations-grid {
  display: grid;
  grid-template-columns: minmax(240px, 0.55fr) minmax(0, 1fr);
  gap: 64px;
}

.method-copy {
  max-width: 850px;
}

.method-copy h3 {
  margin: 30px 0 8px;
}

.method-copy h3:first-child {
  margin-top: 0;
}

.method-copy p,
.limitations-grid li {
  color: var(--muted);
}

.limitations-grid ul {
  margin: 0;
  padding-left: 20px;
}

.limitations-grid li {
  padding-block: 7px;
}

footer {
  border-top: 1px solid var(--hairline);
  color: var(--muted-low);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

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

@media (max-width: 1050px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

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

  .run-layout,
  .score-tables {
    grid-template-columns: 1fr;
  }

  .run-monitor {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 24px;
  }

  .run-monitor .constraint-list {
    grid-column: 2;
    grid-row: 1 / span 4;
    margin-top: 0;
    padding-top: 0;
    padding-left: 24px;
    border-top: 0;
    border-left: 1px solid var(--hairline);
  }

  .weight-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .score-overview {
    grid-template-columns: 240px 1fr;
  }
}

@media (max-width: 720px) {
  html {
    scroll-behavior: auto;
  }

  .shell {
    width: min(100% - 24px, var(--max-width));
  }

  .site-header nav {
    display: none;
  }

  .hero {
    padding-block: 58px 44px;
    gap: 38px;
  }

  h1 {
    font-size: clamp(2.25rem, 13vw, 3.6rem);
  }

  .section {
    padding-block: 52px;
  }

  .section-heading,
  .method-grid,
  .limitations-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

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

  .field-hint {
    min-height: 0;
  }

  .run-monitor {
    display: block;
  }

  .run-monitor .constraint-list {
    margin-top: 20px;
    padding: 16px 0 0;
    border-top: 1px solid var(--hairline);
    border-left: 0;
  }

  .fixture-strip {
    align-items: stretch;
    flex-direction: column;
  }

  .fixture-strip .button {
    width: 100%;
  }

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

  .score-overview {
    grid-template-columns: 1fr;
  }

  .score-block {
    border-right: 0;
    border-bottom: 1px solid var(--hairline);
  }

  .score-meta {
    grid-template-columns: 1fr;
  }

  .score-meta div {
    border-right: 0;
    border-bottom: 1px solid var(--hairline);
  }

  .score-meta div:last-child {
    border-bottom: 0;
  }

  .results-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .results-actions .button,
  .run-label {
    width: 100%;
    max-width: none;
  }

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

  .detail-grid section:last-child {
    grid-column: auto;
  }

  .schema-item summary {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .footer-row {
    padding-block: 14px;
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }
}

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