:root {
  color-scheme: light;
  --canvas: #f4f2ed;
  --paper: #fbfaf7;
  --ink: #181b1f;
  --muted: #646a70;
  --line: #d5d2cb;
  --line-strong: #aaa9a4;
  --blue: #1d4ed8;
  --blue-soft: #e8eefc;
  --amber: #b45309;
  --amber-soft: #fff2d9;
  --unknown: #747b82;
  --green: #18704b;
  --shadow: 0 18px 55px rgba(28, 32, 38, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(24, 27, 31, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 27, 31, 0.035) 1px, transparent 1px),
    var(--canvas);
  background-size: 24px 24px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.matrix-page {
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.matrix-page .masthead,
.matrix-page footer {
  flex: 0 0 auto;
}

.matrix-page main {
  min-height: 0;
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
}

.matrix-page .matrix-shell {
  min-height: 0;
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  margin-bottom: 12px;
}

.matrix-page .controls {
  position: relative;
  top: auto;
  flex: 0 0 auto;
}

.matrix-page .table-wrap {
  min-height: 0;
  flex: 1 1 auto;
  max-height: none;
  overflow: auto;
  overscroll-behavior: contain;
}

.matrix-page footer {
  min-height: 38px;
  padding: 8px 0 10px;
}

button,
input {
  font: inherit;
}

a {
  color: inherit;
}

.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;
}

.masthead {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid rgba(170, 169, 164, 0.8);
  background: rgba(244, 242, 237, 0.92);
  backdrop-filter: blur(16px);
}

.masthead__inner,
main,
footer {
  width: min(1720px, calc(100% - 40px));
  margin-inline: auto;
}

.masthead__inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: white;
  background: var(--ink);
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13px;
}

.topnav a {
  color: var(--ink);
  text-underline-offset: 4px;
}

.updated {
  color: var(--muted);
}

.eyebrow,
.section-label {
  margin: 0 0 14px;
  color: var(--blue);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(38px, 5vw, 70px);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.matrix-shell {
  margin-bottom: 56px;
  border: 0;
  background: var(--paper);
  box-shadow: none;
}

.controls {
  position: sticky;
  top: 64px;
  z-index: 30;
  border-bottom: 1px solid var(--line);
  background: rgba(251, 250, 247, 0.96);
  backdrop-filter: blur(16px);
}

.controls__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 22px 24px 18px;
}

.section-label {
  margin-bottom: 6px;
  color: var(--muted);
}

.matrix-title {
  max-width: none;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.025em;
  white-space: nowrap;
}

h2 {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.025em;
}

.search {
  width: min(480px, 48%);
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 11px;
  border: 1px solid var(--line-strong);
  background: white;
}

.search:focus-within {
  outline: 3px solid rgba(29, 78, 216, 0.16);
  border-color: var(--blue);
}

.search svg {
  width: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.search input {
  min-width: 0;
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
}

.search kbd {
  padding: 2px 6px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--canvas);
  font-size: 11px;
}

.tabs {
  display: flex;
  gap: 0;
  padding-inline: 16px;
  overflow-x: auto;
  border-top: 1px solid var(--line);
  scrollbar-width: thin;
}

.tabs button {
  position: relative;
  flex: 0 0 auto;
  padding: 14px 12px 12px;
  color: var(--muted);
  border: 0;
  border-bottom: 3px solid transparent;
  background: transparent;
  cursor: pointer;
  font-size: 13px;
}

.tabs button:hover {
  color: var(--ink);
}

.tabs button.is-active {
  color: var(--blue);
  border-bottom-color: var(--blue);
  font-weight: 700;
}

.tabs button span {
  margin-left: 5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 10px;
}

.product-filter {
  min-height: 48px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.product-toggles {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.product-toggles label {
  cursor: pointer;
}

.product-toggles input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.product-toggles span {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  background: var(--canvas);
  border-radius: 4px;
}

.product-toggles input:checked + span {
  color: var(--blue);
  border-color: #9bb3ef;
  background: var(--blue-soft);
  font-weight: 700;
}

.product-toggles input:focus-visible + span {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.text-button {
  margin-left: auto;
  padding: 4px 0;
  color: var(--blue);
  border: 0;
  background: transparent;
  cursor: pointer;
  font-size: 12px;
}

.table-wrap {
  max-width: 100%;
  max-height: min(74vh, 900px);
  overflow: auto;
  outline: none;
}

table {
  width: 100%;
  min-width: 1240px;
  border-collapse: separate;
  border-spacing: 0;
  table-layout: fixed;
  font-size: 13px;
}

th,
td {
  min-width: 190px;
  padding: 15px 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  line-height: 1.55;
}

thead {
  position: sticky;
  top: 0;
  z-index: 15;
}

thead th {
  position: relative;
  z-index: 1;
  padding-block: 13px;
  color: #41464c;
  background: #efede8;
  border-bottom-color: var(--line-strong);
  box-shadow: 0 1px 0 var(--line-strong);
  font-size: 12px;
  font-weight: 750;
}

tbody tr {
  scroll-margin-top: 300px;
}

tbody tr:hover td,
tbody tr:hover th {
  background-color: #f7f6f2;
}

.capability-column {
  position: sticky;
  left: 0;
  z-index: 8;
  width: 240px;
  min-width: 240px;
  background: var(--paper);
  box-shadow: 1px 0 0 var(--line);
}

thead .capability-column {
  z-index: 20;
  background: #e8e5df;
}

.category-tag {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.capability-link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  font-weight: 720;
}

.capability-link:hover {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.capability-link span {
  color: var(--blue);
  font-size: 11px;
}

.capability-title {
  display: block;
  font-size: 14px;
  font-weight: 720;
}

.detail-pending {
  display: inline-block;
  margin-top: 5px;
  color: var(--unknown);
  font-size: 10px;
  font-weight: 500;
}

.cell {
  position: relative;
  padding-left: 20px;
}

.cell::before {
  position: absolute;
  top: 20px;
  left: 10px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  content: "";
}

.cell--confirmed::before {
  background: var(--green);
}

.cell--conditional::before {
  background: var(--amber);
}

.cell--unknown {
  color: var(--unknown);
}

.cell--unknown::before {
  background: var(--unknown);
}

code {
  padding: 2px 5px;
  color: #193a83;
  background: var(--blue-soft);
  border-radius: 3px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  white-space: nowrap;
}

.empty {
  padding: 80px 24px;
  text-align: center;
}

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

.empty button {
  padding: 8px 12px;
  color: white;
  border: 0;
  background: var(--blue);
  cursor: pointer;
}

.doc-link {
  display: inline-block;
  margin-top: 20px;
  color: var(--blue);
  font-weight: 700;
  text-underline-offset: 4px;
}

.capability-main {
  width: min(1360px, calc(100% - 40px));
}

.breadcrumb {
  display: flex;
  gap: 8px;
  padding: 28px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.breadcrumb a {
  color: var(--blue);
  text-underline-offset: 3px;
}

.capability-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 80px;
  align-items: end;
  padding: 72px 0 58px;
}

.capability-hero h1 {
  max-width: 850px;
}

.capability-hero__description {
  max-width: 820px;
  margin: 24px 0 0;
  color: #444a50;
  font-size: 18px;
  line-height: 1.8;
}

.capability-meta {
  margin: 0;
  border-top: 1px solid var(--line-strong);
}

.capability-meta div {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 18px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.capability-meta dt {
  color: var(--muted);
  font-size: 11px;
}

.capability-meta dd {
  margin: 0;
  font-size: 12px;
  font-weight: 650;
}

.detail-section {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 34px;
  padding: 44px 0 54px;
  border-top: 1px solid var(--line-strong);
}

.section-heading {
  align-self: start;
  position: sticky;
  top: 92px;
}

.section-heading h2 {
  font-size: 22px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.quick-card {
  min-height: 168px;
  display: flex;
  flex-direction: column;
  padding: 18px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  background: var(--paper);
}

.quick-card::before {
  width: 18px;
  height: 3px;
  margin-bottom: 18px;
  background: var(--green);
  content: "";
}

.quick-card--conditional::before {
  background: var(--amber);
}

.quick-card--unknown::before {
  background: var(--unknown);
}

.quick-card h3 {
  margin: 0;
  font-size: 13px;
}

.quick-card p {
  flex: 1;
  margin: 18px 0;
  color: #3e444a;
  line-height: 1.6;
}

.quick-card a {
  color: var(--blue);
  font-size: 11px;
  text-underline-offset: 3px;
}

.boundary-grid,
.evidence-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.boundary-grid > div,
.evidence-grid > div {
  padding: 24px;
  border: 1px solid var(--line-strong);
  background: rgba(251, 250, 247, 0.7);
}

.boundary-grid h3,
.evidence-grid h3 {
  margin: 0 0 18px;
  font-size: 13px;
}

.boundary-grid ul {
  display: grid;
  gap: 11px;
  margin: 0;
  padding-left: 20px;
  color: #444a50;
  line-height: 1.6;
}

.fact-list {
  margin: 0;
  padding: 0;
  counter-reset: fact;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.fact-list li {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  color: #383e44;
  line-height: 1.7;
  counter-increment: fact;
}

.fact-list li::before {
  color: var(--blue);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  content: "F-" counter(fact, decimal-leading-zero);
}

.product-section {
  grid-template-columns: 1fr;
}

.product-section .section-heading {
  position: static;
}

.product-index {
  position: sticky;
  top: 64px;
  z-index: 25;
  display: flex;
  gap: 0;
  overflow-x: auto;
  border: 1px solid var(--line-strong);
  background: rgba(244, 242, 237, 0.96);
  backdrop-filter: blur(14px);
}

.product-index a {
  flex: 1 0 auto;
  padding: 13px 18px;
  color: var(--ink);
  border-right: 1px solid var(--line);
  text-align: center;
  text-decoration: none;
  font-size: 12px;
  font-weight: 650;
}

.product-index a:hover {
  color: var(--blue);
  background: var(--blue-soft);
}

.product-records {
  display: grid;
  gap: 24px;
  padding-top: 24px;
}

.product-record {
  scroll-margin-top: 128px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

.product-record > header {
  display: grid;
  grid-template-columns: 90px 1fr;
  border-bottom: 1px solid var(--line-strong);
}

.record-number {
  display: grid;
  place-items: center;
  color: var(--blue);
  border-right: 1px solid var(--line-strong);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 22px;
}

.product-record > header > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 19px 22px;
}

.product-record h3 {
  margin: 0;
  font-size: 20px;
}

.status {
  padding: 4px 8px;
  border: 1px solid;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
}

.status--confirmed {
  color: var(--green);
  border-color: #8ebda7;
  background: #eaf5ef;
}

.status--conditional {
  color: var(--amber);
  border-color: #ddb480;
  background: var(--amber-soft);
}

.status--unknown {
  color: var(--unknown);
  border-color: var(--line-strong);
  background: var(--canvas);
}

.product-record dl {
  margin: 0;
}

.product-record dl > div {
  display: grid;
  grid-template-columns: 160px 1fr;
  min-height: 54px;
  border-bottom: 1px solid var(--line);
}

.product-record dl > div:last-child {
  border-bottom: 0;
}

.product-record dt,
.product-record dd {
  padding: 15px 20px;
}

.product-record dt {
  color: var(--muted);
  border-right: 1px solid var(--line);
  background: #f2f0eb;
  font-size: 11px;
  font-weight: 650;
}

.product-record dd {
  margin: 0;
  color: #383e44;
  line-height: 1.65;
}

.empty-value {
  color: var(--unknown);
}

.inline-sources {
  display: flex;
  gap: 8px 18px;
  flex-wrap: wrap;
}

.inline-sources a,
.source-list a,
.related-list a {
  color: var(--blue);
  text-underline-offset: 3px;
}

.source-list,
.related-list {
  display: grid;
}

.source-list a,
.related-list a {
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
}

.source-list a {
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.capability-pagination {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 18px;
  align-items: stretch;
  padding: 12px 0 70px;
}

.capability-pagination a,
.capability-pagination button {
  min-height: 64px;
  padding: 12px 16px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

.capability-pagination a {
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: var(--ink);
  text-decoration: none;
  font-weight: 650;
}

.capability-pagination a:last-child {
  text-align: right;
}

.capability-pagination a span {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 9px;
  text-transform: uppercase;
}

.capability-pagination button {
  color: var(--blue);
  cursor: pointer;
  font-size: 12px;
}

.missing-page {
  min-height: calc(100vh - 160px);
  padding: 120px 0;
}

.missing-page p:not(.eyebrow) {
  color: var(--muted);
  line-height: 1.7;
}

.missing-page a {
  color: var(--blue);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 30px 0 44px;
  color: var(--muted);
  border-top: 1px solid var(--line-strong);
  font-size: 13px;
}

footer p {
  margin: 0;
}

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

@media (max-width: 900px) {
  .masthead__inner,
  main,
  footer {
    width: min(100% - 24px, 1720px);
  }

  .updated {
    display: none;
  }

  .controls {
    top: 63px;
  }

  .controls__top {
    align-items: stretch;
    flex-direction: column;
    gap: 16px;
  }

  .search {
    width: 100%;
  }

  .product-filter {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .text-button {
    margin-left: 0;
  }

  .capability-hero {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

  .section-heading {
    position: static;
  }

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

@media (max-width: 600px) {
  .topnav a:first-of-type {
    display: none;
  }

  h1 {
    font-size: 40px;
  }

  .controls__top,
  .product-filter {
    padding-inline: 14px;
  }

  .search kbd {
    display: none;
  }

  .capability-main {
    width: min(100% - 24px, 1360px);
  }

  .capability-hero {
    padding-top: 44px;
  }

  .capability-hero__description {
    font-size: 16px;
  }

  .quick-grid,
  .boundary-grid,
  .evidence-grid {
    grid-template-columns: 1fr;
  }

  .product-record > header {
    grid-template-columns: 58px 1fr;
  }

  .product-record dl > div {
    grid-template-columns: 1fr;
  }

  .product-record dt {
    padding-bottom: 6px;
    border-right: 0;
  }

  .product-record dd {
    padding-top: 8px;
  }

  .capability-pagination {
    grid-template-columns: 1fr 1fr;
  }

  .capability-pagination button {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  footer {
    flex-direction: column;
  }
}

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

}

@media (max-height: 760px) {
  .matrix-page footer {
    display: none;
  }
}