:root {
  color-scheme: light dark;
  --paper: #f4f7fb;
  --paper-raised: #ffffff;
  --paper-blue: #e5eefb;
  --ink: #13233a;
  --ink-muted: #53647a;
  --rule: #aab8c9;
  --rule-strong: #61758e;
  --blue: #075fc9;
  --blue-deep: #004898;
  --blue-text: #f7fbff;
  --amber: #8a4d00;
  --amber-paper: #fff0d2;
  --read: #20644b;
  --read-paper: #daf1e7;
  --focus: #005bd1;
  --measure: 72ch;
  --page: 84rem;
  --space-1: 0.35rem;
  --space-2: 0.65rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.25rem;
  --space-6: 3.5rem;
  --radius: 0.25rem;
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  scroll-behavior: smooth;
}

body {
  min-width: 20rem;
  margin: 0;
  background:
    linear-gradient(90deg, transparent 0, transparent calc(50% - 1px), rgba(7, 95, 201, 0.05) 50%, transparent calc(50% + 1px)),
    var(--paper);
}

a {
  color: var(--blue-deep);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 0.08em;
}

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

button,
input {
  min-height: 44px;
  font: inherit;
}

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

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

[hidden] {
  display: none !important;
}

code,
pre,
.version,
.record-classification,
.tier,
.record-register,
.wordmark,
.record-index,
legend {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.skip-link {
  position: fixed;
  z-index: 20;
  inset: var(--space-3) auto auto var(--space-3);
  padding: 0.7rem 1rem;
  background: var(--blue);
  color: var(--blue-text);
  transform: translateY(-180%);
}

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

.site-header,
main,
footer {
  width: min(100% - 2rem, var(--page));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  min-height: 4.25rem;
  border-block: 1px solid var(--rule-strong);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.site-header nav {
  display: flex;
  align-items: stretch;
}

.site-header nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-inline: 1rem;
  border-left: 1px solid var(--rule);
  color: var(--ink);
  font-size: 0.9rem;
  text-decoration: none;
}

.site-header nav a:hover {
  background: var(--paper-blue);
}

.opening-field {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(24rem, 0.9fr);
  border-bottom: 1px solid var(--rule-strong);
}

.opening-copy {
  padding: clamp(2rem, 3.5vw, 3.25rem) clamp(1rem, 4vw, 3.75rem) clamp(2rem, 3vw, 2.75rem) 0;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  line-height: 1.08;
}

h1 {
  max-width: 17ch;
  margin: 0 0 var(--space-3);
  font-size: clamp(2.6rem, 4.6vw, 4.4rem);
  font-weight: 760;
  letter-spacing: -0.035em;
}

.lede {
  max-width: 61ch;
  margin: 0 0 var(--space-4);
  color: var(--ink-muted);
  font-size: clamp(1.05rem, 1.4vw, 1.22rem);
}

.truth-ledger {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: 52rem;
  margin: 0;
  border-block: 1px solid var(--rule);
}

.truth-ledger div {
  padding: var(--space-3);
  border-right: 1px solid var(--rule);
}

.truth-ledger div:last-child {
  border-right: 0;
}

.truth-ledger dt {
  color: var(--ink-muted);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.truth-ledger dd {
  margin: var(--space-1) 0 0;
  font-weight: 700;
}

.core-ledger {
  align-self: stretch;
  padding: clamp(1.75rem, 3vw, 2.75rem);
  border-left: 1px solid var(--rule-strong);
  background: var(--paper-blue);
}

.ledger-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--rule-strong);
}

.ledger-heading h2 {
  margin: 0 0 var(--space-2);
  font-size: clamp(1.5rem, 2.5vw, 2.1rem);
}

.ledger-heading span,
.ledger-note {
  color: var(--ink-muted);
  font-size: 0.82rem;
}

.client-tabs [role="tablist"] {
  display: flex;
  gap: 0;
  margin-top: var(--space-4);
  border-bottom: 1px solid var(--rule-strong);
}

.client-tabs [role="tab"] {
  flex: 1 1 0;
  min-width: 0;
  padding: 0.65rem 1rem;
  border: 0;
  border-right: 1px solid var(--rule);
  background: transparent;
  color: var(--ink-muted);
  cursor: pointer;
  text-align: center;
}

.client-tabs [role="tab"][aria-selected="true"] {
  background: var(--blue);
  color: var(--blue-text);
  font-weight: 700;
}

.client-tabs [role="tabpanel"] {
  padding-top: var(--space-3);
}

.command-specimen {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  margin-block: var(--space-3);
  border: 1px solid var(--rule-strong);
  background: #0f2035;
}

.command-specimen pre {
  max-width: 100%;
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
  color: #f2f7ff;
  font-size: 0.83rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.copy-button {
  align-self: stretch;
  min-width: 7rem;
  padding: 0.65rem 0.9rem;
  border: 0;
  border-left: 1px solid #7891ad;
  background: #16395f;
  color: #f2f7ff;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 700;
}

.copy-button:hover {
  background: #075fc9;
}

.directory {
  padding-block: var(--space-5) var(--space-6);
}

.directory-head {
  display: grid;
  grid-template-columns: 1fr minmax(18rem, 0.7fr);
  gap: var(--space-2) var(--space-5);
  align-items: end;
  margin-bottom: var(--space-4);
}

.directory-head h2 {
  margin: 0 0 var(--space-1);
  font-size: clamp(2rem, 4vw, 3.3rem);
  letter-spacing: -0.025em;
}

.directory-head p,
.directory-head label {
  margin: 0;
  color: var(--ink-muted);
}

.directory-head label {
  align-self: end;
  font-size: 0.85rem;
  font-weight: 700;
}

#skill-search {
  grid-column: 2;
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--rule-strong);
  border-radius: 0;
  background: var(--paper-raised);
  color: var(--ink);
}

.filter-index {
  display: grid;
  grid-template-columns: repeat(3, 1fr) auto;
  align-items: stretch;
  margin-bottom: var(--space-4);
  border-block: 1px solid var(--rule-strong);
}

.filter-index fieldset {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  margin: 0;
  padding: var(--space-2) var(--space-3) var(--space-3);
  border: 0;
  border-right: 1px solid var(--rule);
}

.filter-index legend {
  width: 100%;
  padding-top: var(--space-2);
  color: var(--ink-muted);
  font-size: 0.69rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.filter-index label {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  gap: 0.45rem;
  font-size: 0.85rem;
}

.filter-index input[type="checkbox"] {
  width: 1.1rem;
  min-height: auto;
  height: 1.1rem;
  accent-color: var(--blue);
}

.clear-filters {
  align-self: stretch;
  padding-inline: 1rem;
  border: 0;
  background: transparent;
  color: var(--blue-deep);
  cursor: pointer;
  font-weight: 700;
}

.clear-filters:hover {
  background: var(--paper-blue);
}

.record-column {
  border-top: 2px solid var(--ink);
}

.skill-record {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr) minmax(13rem, 0.38fr);
  min-height: 7.5rem;
  border-bottom: 1px solid var(--rule-strong);
  background: color-mix(in srgb, var(--paper) 94%, var(--paper-raised));
}

.skill-record:hover {
  background: var(--paper-raised);
}

.record-register {
  padding: var(--space-4) var(--space-3);
  border-right: 1px solid var(--rule);
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 800;
}

.record-body,
.record-meta {
  padding: var(--space-3) var(--space-4);
}

.record-heading {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.record-heading h2 {
  margin: 0;
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
}

.record-heading h2 a {
  color: var(--ink);
  text-decoration: none;
}

.record-heading h2 a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.version {
  color: var(--ink-muted);
  font-size: 0.75rem;
}

.record-body p {
  max-width: var(--measure);
  margin: var(--space-2) 0 var(--space-3);
  color: var(--ink-muted);
}

.tag-list,
.tool-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.tag-list li,
.tool-list li {
  padding: 0.28rem 0.48rem;
  border: 1px solid var(--rule);
  font-size: 0.74rem;
}

.record-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  border-left: 1px solid var(--rule);
}

.tier {
  color: var(--ink-muted);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.permission {
  display: inline-block;
  padding: 0.3rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
}

.permission-read {
  background: var(--read-paper);
  color: var(--read);
}

.permission-write {
  background: var(--amber-paper);
  color: var(--amber);
}

.record-open {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: auto;
  color: var(--blue-deep);
  font-weight: 750;
}

.empty-result {
  padding: var(--space-6) var(--space-3);
  border-block: 1px solid var(--rule-strong);
  text-align: center;
}

.copy-status {
  position: fixed;
  z-index: 10;
  right: var(--space-3);
  bottom: var(--space-3);
  max-width: 24rem;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--paper-raised);
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.5rem);
  transition: opacity 160ms ease-out, transform 160ms ease-out;
}

.copy-status[data-visible="true"] {
  opacity: 1;
  transform: translateY(0);
}

footer {
  padding-block: var(--space-4);
  border-top: 1px solid var(--rule-strong);
  color: var(--ink-muted);
  font-size: 0.82rem;
}

footer code {
  overflow-wrap: anywhere;
  word-break: break-all;
}

.record-sections p code,
.record-sections dd code,
.record-sections li code {
  overflow-wrap: anywhere;
  word-break: break-all;
}

.detail-main {
  max-width: var(--page);
}

.record-title-block {
  padding-block: clamp(2.5rem, 7vw, 6rem);
  border-bottom: 1px solid var(--rule-strong);
}

.record-classification {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: var(--space-4);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.record-classification > span {
  padding: 0.42rem 0.6rem;
  border: 1px solid var(--rule-strong);
  border-right: 0;
}

.record-classification > span:last-child {
  border-right: 1px solid var(--rule-strong);
}

.record-classification .permission {
  display: inline-flex;
  align-items: center;
  border-color: var(--rule-strong);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

.record-title-block h1 {
  max-width: 18ch;
}

.record-title-block > p {
  max-width: 65ch;
  color: var(--ink-muted);
  font-size: 1.15rem;
}

.record-layout {
  display: grid;
  grid-template-columns: 15rem minmax(0, 1fr);
  align-items: start;
}

.record-index {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  padding: var(--space-5) var(--space-4) var(--space-5) 0;
  border-right: 1px solid var(--rule-strong);
  font-size: 0.76rem;
}

.record-index p {
  margin: 0 0 var(--space-2);
  color: var(--ink-muted);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.record-index a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding-inline: 0.7rem;
  border-top: 1px solid var(--rule);
  color: var(--ink);
  text-decoration: none;
}

.record-index a:hover {
  background: var(--paper-blue);
  color: var(--blue-deep);
}

.record-sections {
  min-width: 0;
  padding-left: clamp(2rem, 6vw, 6rem);
}

.record-sections > section {
  padding-block: var(--space-6);
  border-bottom: 1px solid var(--rule-strong);
}

.record-sections h2 {
  max-width: 22ch;
  margin: 0 0 var(--space-4);
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  letter-spacing: -0.02em;
}

.record-sections h3 {
  margin: var(--space-5) 0 var(--space-2);
  font-size: 1.05rem;
}

.record-sections p,
.record-sections dl,
.record-sections ol {
  max-width: var(--measure);
}

.manifest-specimen pre {
  max-height: 28rem;
}

.safety-callout {
  padding: var(--space-3);
  border-block: 1px solid var(--rule-strong);
  background: var(--amber-paper);
  color: var(--amber);
  font-weight: 700;
}

.smoke-ledger {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ink);
}

.smoke-ledger > li {
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--rule);
}

.smoke-number {
  color: var(--blue);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-weight: 800;
}

.smoke-ledger h3,
.smoke-ledger p {
  margin: 0 0 var(--space-2);
}

.smoke-note {
  color: var(--ink-muted);
  font-size: 0.85rem;
}

.troubleshooting-ledger {
  margin: 0;
  border-top: 2px solid var(--ink);
}

.troubleshooting-ledger div {
  display: grid;
  grid-template-columns: minmax(12rem, 0.4fr) minmax(0, 1fr);
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--rule);
}

.troubleshooting-ledger dt {
  font-weight: 760;
}

.troubleshooting-ledger dd {
  margin: 0;
  color: var(--ink-muted);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #101b2a;
    --paper-raised: #18263a;
    --paper-blue: #172c49;
    --ink: #eef5ff;
    --ink-muted: #b9c7da;
    --rule: #52647d;
    --rule-strong: #8092aa;
    --blue: #69aaf9;
    --blue-deep: #9bc6ff;
    --blue-text: #0c1d32;
    --amber: #ffd18a;
    --amber-paper: #4b3214;
    --read: #9ce5c8;
    --read-paper: #193a31;
    --focus: #8bc1ff;
  }

  .skill-record {
    background: color-mix(in srgb, var(--paper) 94%, var(--paper-raised));
  }

  .command-specimen {
    background: #09121f;
  }
}

@media (max-width: 900px) {
  .opening-field,
  .record-layout {
    grid-template-columns: 1fr;
  }

  .core-ledger {
    border-top: 1px solid var(--rule-strong);
    border-left: 0;
  }

  .record-index {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    padding-right: 0;
    border-right: 0;
    border-bottom: 1px solid var(--rule-strong);
  }

  .record-index p {
    grid-column: 1 / -1;
  }

  .record-index a:nth-of-type(odd) {
    border-right: 1px solid var(--rule);
  }

  .record-sections {
    padding-left: 0;
  }
}

@media (max-width: 720px) {
  .site-header,
  main,
  footer {
    width: min(100% - 1.25rem, var(--page));
  }

  .site-header {
    display: block;
  }

  .wordmark {
    width: 100%;
  }

  .site-header nav {
    display: grid;
    grid-template-columns: 1fr;
    border-top: 1px solid var(--rule);
  }

  .site-header nav a {
    justify-content: center;
    padding-inline: 0.5rem;
    border-top: 1px solid var(--rule);
    border-left: 0;
    text-align: center;
  }

  .opening-copy {
    padding: 1.5rem 0 1rem;
  }

  h1 {
    margin-bottom: 0.8rem;
    font-size: clamp(2.15rem, 11.5vw, 3.6rem);
    line-height: 1.02;
  }

  .lede {
    margin-bottom: 1rem;
    font-size: 0.96rem;
    line-height: 1.45;
  }

  .directory-head,
  .filter-index,
  .skill-record,
  .troubleshooting-ledger div {
    grid-template-columns: 1fr;
  }

  .truth-ledger {
    grid-template-columns: 1fr;
  }

  .truth-ledger div {
    min-height: 4.25rem;
    padding: 0.55rem 0.65rem;
  }

  .truth-ledger dt {
    font-size: 0.63rem;
  }

  .truth-ledger dd {
    font-size: 0.82rem;
  }

  .record-index {
    grid-template-columns: 1fr;
  }

  .record-index a:nth-of-type(odd) {
    border-right: 0;
  }

  .core-ledger {
    padding: 1rem 0;
  }

  .core-ledger > p {
    margin-block: 0.5rem;
    font-size: 0.86rem;
  }

  .ledger-heading {
    margin-bottom: 0.5rem;
  }

  .ledger-heading h2 {
    font-size: 1.25rem;
  }

  .client-tabs [role="tablist"] {
    margin-top: 0.65rem;
  }

  .client-tabs [role="tab"] {
    padding-inline: 0.45rem;
    font-size: 0.78rem;
  }

  .client-tabs [role="tabpanel"] {
    padding-top: 0.35rem;
  }

  .core-ledger .command-specimen {
    margin-block: 0.45rem;
  }

  .core-ledger .command-specimen pre {
    padding: 0.65rem;
    font-size: 0.72rem;
  }

  .truth-ledger div,
  .record-meta,
  .filter-index fieldset {
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }

  .record-register {
    padding: var(--space-2) var(--space-3);
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }

  .record-meta {
    border-left: 0;
  }

  .record-open {
    margin-top: var(--space-2);
  }

  #skill-search {
    grid-column: 1;
  }

  .clear-filters {
    min-height: 52px;
  }

  .command-specimen {
    grid-template-columns: 1fr;
  }

  .copy-button {
    border-top: 1px solid #7891ad;
    border-left: 0;
  }

  .record-classification > span {
    border-right: 1px solid var(--rule-strong);
  }
}

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

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