:root {
  --canvas: #f4f7fb;
  --panel: #ffffff;
  --sunken: #eaf0f7;
  --navy-950: #081a31;
  --navy-900: #102847;
  --navy-800: #183a63;
  --navy-700: #24517f;
  --blue-600: #2563a9;
  --blue-100: #dceafe;
  --green-700: #17603b;
  --green-100: #dff4e8;
  --amber-800: #744800;
  --amber-100: #fff0c9;
  --violet-700: #674093;
  --violet-100: #efe5fb;
  --red-700: #91312f;
  --red-100: #fce8e6;
  --ink: #172235;
  --muted: #526177;
  --line: #cad5e2;
  --line-strong: #9badc0;
  --focus: #f4b942;
  --shadow: 0 4px 8px rgb(13 37 66 / 0.08);
  --radius: 14px;
  --shell: min(100% - 2rem, 92rem);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: var(--blue-600);
}

a:hover {
  color: var(--navy-900);
}

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

code {
  border-radius: 4px;
  background: var(--sunken);
  color: var(--navy-800);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  background: white;
  color: var(--navy-950);
  transform: translateY(-150%);
}

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

.site-header {
  background: var(--navy-950);
  color: white;
}

.header-inner,
.site-nav,
.shell,
.site-footer-inner {
  width: var(--shell);
  margin-inline: auto;
}

.header-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.72fr);
  gap: 2rem;
  padding-block: 2.2rem 1.8rem;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: #9ec5ef;
  font-size: 0.78rem;
  font-weight: 700;
}

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

h1 {
  max-width: 22ch;
  margin-bottom: 0.75rem;
  font-size: 3.25rem;
  line-height: 1.04;
  letter-spacing: -0.04em;
}

h2 {
  color: var(--navy-950);
  font-size: 1.65rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h3 {
  margin-bottom: 0.35rem;
  color: var(--navy-900);
  font-size: 1rem;
}

.header-copy {
  max-width: 66ch;
  margin: 0;
  color: #cbd9e8;
}

.truth-card {
  align-self: end;
  padding: 1rem;
  border: 1px solid rgb(255 255 255 / 0.25);
  border-radius: var(--radius);
  background: rgb(255 255 255 / 0.06);
}

.truth-card strong {
  display: block;
  margin-bottom: 0.35rem;
  color: #ffd982;
}

.truth-card p {
  margin: 0;
  color: #d8e2ed;
  font-size: 0.88rem;
}

.site-nav-wrap {
  border-top: 1px solid rgb(255 255 255 / 0.12);
  background: #0c2340;
}

.site-nav {
  display: flex;
  gap: 0.35rem;
  overflow-x: auto;
  padding-block: 0.7rem;
  scrollbar-width: thin;
}

.site-nav a {
  display: inline-flex;
  min-height: 2.75rem;
  flex: 0 0 auto;
  align-items: center;
  padding: 0.55rem 0.72rem;
  border: 1px solid transparent;
  border-radius: 8px;
  color: #d8e5f2;
  font-size: 0.75rem;
  font-weight: 750;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  border-color: #6f92b8;
  background: #173b63;
  color: white;
}

.shell {
  padding-block: 1.6rem 4rem;
}

.breadcrumb {
  margin-bottom: 1.1rem;
  color: var(--muted);
  font-size: 0.76rem;
}

.breadcrumb a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  font-weight: 700;
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.2rem;
  align-items: center;
  margin-bottom: 1.5rem;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  background: var(--navy-950);
  color: white;
  font-size: 0.8rem;
}

.status-strip strong {
  color: #ffd982;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(20rem, 1fr);
  gap: 1.5rem;
  align-items: end;
  margin-block: 2.4rem 1rem;
}

.section-heading h2,
.section-heading p {
  margin-bottom: 0;
}

.section-heading p {
  color: var(--muted);
}

.context-link {
  margin: 0.85rem 0 0;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--sunken);
  color: var(--muted);
  font-size: 0.8rem;
}

.context-link a {
  font-weight: 750;
}

.domain-grid,
.summary-grid,
.gate-grid,
.split-grid,
.evidence-grid {
  display: grid;
  gap: 0.85rem;
}

.domain-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--panel);
}

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

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

.domain-card,
.info-card,
.gate-card,
.evidence-card,
.sequence,
.boundary,
.catalog-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: none;
}

.domain-card {
  display: flex;
  min-height: 10rem;
  flex-direction: column;
  padding: 1rem;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  color: inherit;
  text-decoration: none;
}

.domain-card:hover {
  background: var(--sunken);
  color: inherit;
}

.domain-card p,
.info-card p,
.gate-card p,
.evidence-card p,
.boundary p {
  color: var(--muted);
  font-size: 0.85rem;
}

.domain-card .route {
  margin-top: auto;
  color: var(--blue-600);
  font-size: 0.76rem;
  font-weight: 800;
}

.info-card,
.gate-card,
.evidence-card,
.boundary {
  padding: 1rem;
}

.badge {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.55rem;
  padding: 0.2rem 0.48rem;
  border-radius: 999px;
  font-size: 0.66rem;
  font-weight: 800;
}

.badge.existing {
  background: var(--blue-100);
  color: var(--navy-800);
}

.badge.lab {
  background: var(--green-100);
  color: var(--green-700);
}

.badge.target {
  background: var(--violet-100);
  color: var(--violet-700);
}

.badge.external {
  background: var(--amber-100);
  color: var(--amber-800);
}

.badge.blocked {
  background: var(--red-100);
  color: var(--red-700);
}

.flow-lane {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1.5rem;
  padding: 1rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--panel);
}

.flow-step {
  position: relative;
  min-height: 8rem;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--sunken);
}

.flow-step:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: -1.12rem;
  color: var(--blue-600);
  content: "→";
  font-weight: 900;
  transform: translateY(-50%);
}

.flow-step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
}

.protocol-table,
.catalog-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  background: var(--panel);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--panel);
}

.protocol-table th,
.protocol-table td,
.catalog-table th,
.catalog-table td {
  padding: 0.68rem;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  overflow-wrap: anywhere;
}

.protocol-table th,
.catalog-table th {
  background: var(--sunken);
  color: var(--navy-900);
  font-size: 0.7rem;
}

.protocol-table td,
.catalog-table td {
  color: var(--muted);
  font-size: 0.74rem;
}

.protocol-table td strong,
.catalog-table td strong {
  color: var(--ink);
}

.sequence {
  padding: 1rem;
}

.sequence ol {
  margin: 0;
  padding-left: 1.35rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.sequence li + li {
  margin-top: 0.45rem;
}

.sequence li::marker {
  color: var(--blue-600);
  font-weight: 800;
}

.boundary {
  border-color: #88add4;
  background: #f4f9ff;
}

.boundary.warning {
  border-color: #d6a951;
  background: #fffaf0;
}

.boundary.critical {
  border-color: #d49490;
  background: #fff7f6;
}

.source-note {
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.7rem;
}

.catalog-tools {
  position: sticky;
  z-index: 10;
  top: 0;
  display: grid;
  grid-template-columns: minmax(12rem, 1fr) minmax(9rem, 0.22fr) auto;
  gap: 0.75rem;
  align-items: end;
  margin-block: 1rem;
  padding: 0.85rem;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: rgb(255 255 255 / 0.96);
  box-shadow: none;
}

.catalog-tools label {
  display: grid;
  gap: 0.3rem;
  color: var(--navy-900);
  font-size: 0.7rem;
  font-weight: 800;
}

.catalog-tools input,
.catalog-tools select,
.catalog-tools button {
  min-height: 2.75rem;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: white;
  color: var(--ink);
  font: inherit;
}

.catalog-tools input,
.catalog-tools select {
  padding-inline: 0.65rem;
}

.catalog-tools button {
  padding-inline: 0.8rem;
  cursor: pointer;
  font-size: 0.76rem;
  font-weight: 800;
}

.catalog-summary {
  min-height: 1.4rem;
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.78rem;
}

.catalog-group {
  overflow: hidden;
  margin-bottom: 0.8rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--panel);
}

.catalog-group > summary,
.catalog-item > summary {
  display: flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 0.9rem;
  cursor: pointer;
  color: var(--navy-900);
  font-weight: 800;
}

.catalog-group[open] > summary {
  background: var(--navy-950);
  color: white;
}

.catalog-group-body {
  display: grid;
  gap: 0.65rem;
  padding: 0.75rem;
}

.catalog-item {
  box-shadow: none;
}

.catalog-item[open] > summary {
  background: var(--sunken);
}

.catalog-item-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.catalog-fact {
  padding: 0.7rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.catalog-fact:nth-child(even) {
  border-right: 0;
}

.catalog-fact:last-child:nth-child(odd) {
  grid-column: 1 / -1;
  border-right: 0;
}

.catalog-fact dt {
  margin-bottom: 0.25rem;
  color: var(--navy-800);
  font-size: 0.68rem;
  font-weight: 800;
}

.catalog-fact dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.74rem;
}

.catalog-item[hidden] {
  display: none;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: white;
}

.site-footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.2rem;
  color: var(--muted);
  font-size: 0.72rem;
}

@media (max-width: 70rem) {
  .flow-lane {
    grid-template-columns: 1fr;
  }

  .flow-step {
    min-height: auto;
  }

  .flow-step:not(:last-child)::after {
    top: auto;
    right: 50%;
    bottom: -1.35rem;
    transform: translateX(50%) rotate(90deg);
  }
}

@media (max-width: 48rem) {
  :root {
    --shell: min(100% - 1rem, 92rem);
  }

  .header-inner,
  .section-heading,
  .domain-grid,
  .summary-grid,
  .gate-grid,
  .split-grid,
  .evidence-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    gap: 1rem;
    padding-block: 1.5rem;
  }

  h1 {
    font-size: 2.2rem;
  }

  .catalog-tools {
    position: static;
    grid-template-columns: 1fr;
  }

  .protocol-table,
  .protocol-table tbody,
  .protocol-table tr,
  .protocol-table td,
  .catalog-table,
  .catalog-table tbody,
  .catalog-table tr,
  .catalog-table td {
    display: block;
    width: 100%;
  }

  .protocol-table thead,
  .catalog-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
  }

  .protocol-table tr + tr,
  .catalog-table tr + tr {
    border-top: 0.7rem solid var(--canvas);
  }

  .protocol-table td,
  .catalog-table td {
    display: grid;
    grid-template-columns: minmax(7rem, 0.42fr) minmax(0, 1fr);
    gap: 0.6rem;
  }

  .protocol-table td::before,
  .catalog-table td::before {
    color: var(--navy-800);
    content: attr(data-label);
    font-size: 0.68rem;
    font-weight: 800;
  }

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

  .domain-card {
    border-right: 0;
  }

  .catalog-fact,
  .catalog-fact:nth-child(even),
  .catalog-fact:last-child:nth-child(odd) {
    grid-column: auto;
    border-right: 0;
  }

  .site-footer-inner {
    display: block;
  }

  .site-footer-inner span:last-child {
    display: block;
    margin-top: 0.25rem;
  }
}

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

  * {
    transition: none !important;
  }
}

@media print {
  .site-nav-wrap,
  .catalog-tools,
  .skip-link {
    display: none;
  }

  body {
    background: white;
  }

  .domain-card,
  .info-card,
  .gate-card,
  .evidence-card,
  .sequence,
  .boundary,
  .catalog-item {
    break-inside: avoid;
    box-shadow: none;
  }
}