:root {
  color-scheme: light;
  --ink: #101713;
  --muted: #57615b;
  --paper: #f7f8f5;
  --surface: #ffffff;
  --line: #cdd3ce;
  --line-strong: #8e9a92;
  --accent: #125d7a;
  --accent-dark: #0c4055;
  --success: #13745c;
  --success-soft: #e7f4ef;
  --info: #946817;
  --info-soft: #fbf2dd;
  --failure: #a53a33;
  --failure-soft: #f9e9e6;
  --neutral-soft: #ecefeb;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
}

button,
input,
textarea {
  color: inherit;
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

button {
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--surface);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0;
  min-height: 42px;
  padding: 0.7rem 0.9rem;
}

button:hover,
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.skip-link {
  background: var(--ink);
  color: white;
  left: 1rem;
  padding: 0.7rem 1rem;
  position: fixed;
  top: -5rem;
  z-index: 20;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  align-items: center;
  background: var(--ink);
  color: white;
  display: flex;
  justify-content: space-between;
  min-height: 68px;
  padding: 0.8rem clamp(1rem, 4vw, 4rem);
}

.brand {
  align-items: center;
  display: inline-flex;
  gap: 0.75rem;
  text-decoration: none;
}

.brand span {
  align-items: center;
  background: white;
  color: var(--ink);
  display: inline-flex;
  font-family: var(--mono);
  font-size: 0.83rem;
  font-weight: 800;
  height: 34px;
  justify-content: center;
  width: 42px;
}

.brand b {
  font-family: var(--mono);
  font-size: 0.8rem;
}

.site-header nav,
.site-footer nav {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
}

.site-header nav a,
.site-footer a {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-decoration: none;
}

.site-header nav a[aria-current="page"] {
  border-bottom: 2px solid #5ec3d2;
  padding-bottom: 0.25rem;
}

main {
  margin: 0 auto;
  max-width: 1480px;
}

.intro {
  align-items: end;
  display: grid;
  gap: clamp(2rem, 6vw, 7rem);
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  min-height: min(430px, 52vh);
  padding: clamp(3.5rem, 9vw, 8rem) clamp(1rem, 5vw, 5rem) clamp(2.5rem, 6vw, 5rem);
}

.eyebrow {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 800;
  margin: 0 0 1rem;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  font-size: clamp(2.35rem, 5vw, 4.7rem);
  font-weight: 720;
  line-height: 1.02;
  margin: 0;
  max-width: 17ch;
}

.intro-copy > p {
  color: var(--muted);
  font-size: 1.06rem;
  margin: 0 0 2rem;
  max-width: 54ch;
}

.intro-copy dl {
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
}

.intro-copy dl div {
  padding: 1.15rem 0.8rem;
}

.intro-copy dl div + div {
  border-left: 1px solid var(--line);
}

.intro-copy dt {
  font-family: var(--mono);
  font-size: 1.65rem;
  font-weight: 800;
}

.intro-copy dd {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  margin: 0.2rem 0 0;
}

.lab {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
}

.lab-header,
.catalog-header {
  align-items: end;
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 0.9fr) minmax(300px, 0.7fr);
  padding: 2rem clamp(1rem, 4vw, 4rem);
}

.lab-header h2,
.catalog-header h2,
.agent-band h2,
.boundaries h2 {
  font-size: clamp(1.65rem, 3vw, 2.65rem);
  line-height: 1.12;
  margin: 0;
}

.lab-header > p,
.catalog-header > p {
  color: var(--muted);
  margin: 0;
}

.lab-grid {
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
}

.input-pane,
.result-pane {
  min-width: 0;
  padding: clamp(1rem, 3vw, 2.2rem);
}

.input-pane {
  background: #f1f3f0;
  border-right: 1px solid var(--line);
}

.pane-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  min-height: 50px;
}

.pane-header > div:first-child {
  align-items: center;
  display: flex;
  gap: 0.7rem;
}

.pane-header > div:first-child > span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.pane-header h3 {
  font-family: var(--mono);
  font-size: 0.84rem;
  margin: 0;
}

.mode-tabs {
  display: flex;
}

.mode-tabs button {
  border-radius: 0;
  min-height: 34px;
  padding: 0.4rem 0.65rem;
}

.mode-tabs button + button {
  border-left: 0;
}

.mode-tabs button[aria-selected="true"] {
  background: var(--ink);
  color: white;
}

.input-pane > label,
.catalog-controls label {
  display: block;
  margin-top: 1.4rem;
}

.input-pane > label {
  align-items: center;
  display: flex;
  justify-content: space-between;
}

.input-pane label span,
.catalog-controls label span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.69rem;
  font-weight: 700;
}

.input-pane label b {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.7rem;
}

textarea {
  background: #0d1714;
  border: 1px solid #0d1714;
  border-radius: 4px;
  color: #eaf3ee;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.65;
  margin-top: 0.6rem;
  min-height: 360px;
  padding: 1.1rem;
  resize: vertical;
  width: 100%;
}

textarea::placeholder {
  color: #94a59c;
}

.field-note {
  color: var(--muted);
  font-size: 0.78rem;
  margin: 0.7rem 0 0;
}

.commands,
.result-actions,
.agent-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.2rem;
}

.commands .primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  margin-left: auto;
}

.commands .primary:hover {
  background: var(--accent-dark);
}

[data-state-seal] {
  background: var(--neutral-soft);
  border: 1px solid var(--line);
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.35rem 0.55rem;
}

body[data-state="failure-observed"] [data-state-seal] {
  background: var(--failure-soft);
  border-color: var(--failure);
  color: var(--failure);
}

body[data-state="informational-review"] [data-state-seal],
body[data-state="review-required"] [data-state-seal],
body[data-state="vendor-review-required"] [data-state-seal] {
  background: var(--info-soft);
  border-color: var(--info);
  color: #75510f;
}

body[data-state="no-standard-failure-observed"] [data-state-seal] {
  background: var(--success-soft);
  border-color: var(--success);
  color: var(--success);
}

.result-summary {
  color: var(--muted);
  min-height: 3rem;
  margin: 1.15rem 0;
}

.count-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
}

.count-grid div {
  border-bottom: 1px solid var(--line);
  border-top: 3px solid var(--line-strong);
  min-width: 0;
  padding: 0.9rem 0.75rem;
}

.count-grid div + div {
  border-left: 1px solid var(--line);
}

.count-grid [data-count-kind="failure"] {
  border-top-color: var(--failure);
}

.count-grid [data-count-kind="informational"] {
  border-top-color: var(--info);
}

.count-grid [data-count-kind="success"] {
  border-top-color: var(--success);
}

.count-grid [data-count-kind="unknown"] {
  border-top-color: var(--accent);
}

.count-grid dt {
  font-family: var(--mono);
  font-size: 1.55rem;
  font-weight: 800;
}

.count-grid dd {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.64rem;
  margin: 0.2rem 0 0;
  overflow-wrap: anywhere;
}

.domain-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
}

.domain-strip span {
  background: var(--neutral-soft);
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 0.65rem;
  padding: 0.35rem 0.5rem;
}

.result-list {
  display: grid;
  gap: 0;
  margin-top: 1rem;
  max-height: 560px;
  overflow: auto;
}

.empty-result {
  border: 1px dashed var(--line-strong);
  color: var(--muted);
  margin: 0;
  padding: 2rem 1rem;
  text-align: center;
}

.result-item {
  border-top: 1px solid var(--line);
  padding: 1rem 0;
}

.result-item:last-child {
  border-bottom: 1px solid var(--line);
}

.result-item header {
  align-items: start;
  display: flex;
  gap: 0.7rem;
  justify-content: space-between;
}

.result-item code,
.catalog-item code {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 750;
  overflow-wrap: anywhere;
}

.result-item header span,
.catalog-item > span {
  border-radius: 3px;
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 0.61rem;
  font-weight: 800;
  padding: 0.3rem 0.45rem;
  text-transform: uppercase;
}

[data-class="failure"] {
  background: var(--failure-soft);
  color: var(--failure);
}

[data-class="informational"] {
  background: var(--info-soft);
  color: #75510f;
}

[data-class="success"] {
  background: var(--success-soft);
  color: var(--success);
}

[data-class="unclassified"] {
  background: var(--neutral-soft);
  color: var(--muted);
}

.result-item .meta {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.65rem;
  margin: 0.45rem 0 0;
}

.result-item .meaning {
  margin: 0.75rem 0 0;
}

.result-item .action {
  border-left: 3px solid var(--accent);
  color: var(--muted);
  font-size: 0.82rem;
  margin: 0.75rem 0 0;
  padding-left: 0.75rem;
}

.result-item .mismatch {
  color: var(--failure);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 800;
  margin: 0.6rem 0 0;
}

.agent-band {
  align-items: start;
  background: #dceef1;
  border-bottom: 1px solid #8eb3ba;
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1rem, 5vw, 5rem);
}

.agent-band > div:first-child p:last-child {
  color: #3d555b;
  max-width: 62ch;
}

.agent-contract {
  background: var(--ink);
  border-radius: 4px;
  color: white;
  display: grid;
  gap: 0.4rem;
  padding: 1.1rem;
}

.agent-contract span {
  color: #9bc3ca;
  font-family: var(--mono);
  font-size: 0.62rem;
}

.agent-contract code {
  font-family: var(--mono);
  font-size: 0.72rem;
  overflow-wrap: anywhere;
}

.agent-actions {
  grid-column: 2;
  margin-top: -1rem;
}

.agent-actions a {
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  display: inline-flex;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  min-height: 42px;
  padding: 0.7rem 0.9rem;
  text-decoration: none;
}

.catalog {
  background: var(--surface);
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

.catalog-controls {
  align-items: end;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 1.2rem;
  grid-template-columns: minmax(240px, 0.7fr) minmax(0, 1fr);
  padding: 1.2rem clamp(1rem, 4vw, 4rem);
}

.catalog-controls label {
  margin: 0;
}

.catalog-controls input {
  background: white;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  display: block;
  margin-top: 0.4rem;
  min-height: 44px;
  padding: 0.6rem 0.75rem;
  width: 100%;
}

.catalog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: flex-end;
}

.catalog-filters button[aria-pressed="true"] {
  background: var(--ink);
  color: white;
}

.catalog-count {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
  margin: 0;
  padding: 0 clamp(1rem, 4vw, 4rem) 0.8rem;
}

.catalog-list {
  border-top: 1px solid var(--line);
  margin: 0 clamp(1rem, 4vw, 4rem);
}

.catalog-item {
  align-items: start;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(220px, 0.75fr) minmax(0, 1.5fr) minmax(160px, 0.55fr) auto;
  padding: 0.9rem 0;
}

.catalog-item p {
  color: var(--muted);
  font-size: 0.82rem;
  margin: 0;
}

.catalog-item small {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.64rem;
}

.boundaries {
  border-top: 1px solid var(--line);
  padding: clamp(3rem, 7vw, 6rem) clamp(1rem, 5vw, 5rem);
}

.boundaries > div:first-child {
  max-width: 700px;
}

.boundaries dl {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 2.3rem 0 0;
}

.boundaries dl div {
  border-top: 3px solid var(--line-strong);
  padding: 1rem;
}

.boundaries dl div + div {
  border-left: 1px solid var(--line);
}

.boundaries dt {
  font-weight: 750;
}

.boundaries dd {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0.5rem 0 0;
}

.source-note {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  font-size: 0.76rem;
  gap: 1rem;
  justify-content: space-between;
  margin: 2rem 0 0;
  padding-top: 1rem;
}

.source-note a {
  color: var(--accent);
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 750;
}

.site-footer {
  align-items: center;
  background: var(--ink);
  color: white;
  display: flex;
  justify-content: space-between;
  min-height: 78px;
  padding: 1rem clamp(1rem, 4vw, 4rem);
}

.site-footer > span {
  color: #aebbb3;
  font-family: var(--mono);
  font-size: 0.68rem;
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
  }

  .site-header nav {
    gap: 0.8rem;
    overflow-x: auto;
    padding-bottom: 0.2rem;
    width: 100%;
  }

  .site-header nav a {
    flex: 0 0 auto;
  }

  .intro,
  .lab-header,
  .catalog-header,
  .agent-band {
    grid-template-columns: 1fr;
  }

  .intro {
    min-height: auto;
  }

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

  .input-pane {
    border-bottom: 1px solid var(--line);
    border-right: 0;
  }

  .agent-actions {
    grid-column: 1;
    margin-top: 0;
  }

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

  .catalog-filters {
    justify-content: flex-start;
  }

  .catalog-item {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .catalog-item p,
  .catalog-item small {
    grid-column: 1 / -1;
  }

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

  .boundaries dl div:nth-child(3) {
    border-left: 0;
  }
}

@media (max-width: 560px) {
  .intro {
    gap: 1.4rem;
    padding: 2rem 1rem 1.5rem;
  }

  h1 {
    font-size: 2.2rem;
    line-height: 1.04;
  }

  .intro-copy > p {
    font-size: 0.98rem;
    margin-bottom: 1.1rem;
  }

  .intro-copy dl {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .intro-copy dl div + div {
    border-left: 1px solid var(--line);
    border-top: 0;
  }

  .intro-copy dl div {
    min-width: 0;
    padding: 0.8rem 0.35rem;
  }

  .intro-copy dt {
    font-size: 1.35rem;
  }

  .intro-copy dd {
    font-size: 0.58rem;
    overflow-wrap: anywhere;
  }

  .pane-header {
    align-items: flex-start;
    gap: 0.8rem;
  }

  textarea {
    min-height: 310px;
  }

  .commands button,
  .result-actions button {
    flex: 1 1 100%;
  }

  .commands .primary {
    margin-left: 0;
  }

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

  .count-grid div:nth-child(3) {
    border-left: 0;
  }

  .catalog-filters button {
    flex: 1 1 calc(50% - 0.5rem);
  }

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

  .boundaries dl div + div {
    border-left: 0;
  }

  .source-note,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer nav {
    align-items: flex-start;
    flex-direction: column;
  }
}

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