*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --ink: #090a0d;
  --panel: #101217;
  --panel-2: #14171d;
  --line: rgba(237, 239, 243, .09);
  --line-strong: rgba(237, 239, 243, .18);
  --paper: #edf0f4;
  --slate: #929bad;
  --dim: #5b6475;
  --cyan: #4df0ff;
  --lime: #c6ff3d;
  --pink: #ff3ea5;
  --orange: #ff8a3d;
  --red: #ff5e68;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --display: 'Space Grotesk', sans-serif;
  --body: 'Inter', sans-serif;
  --nav: 60px;
  --rail: 252px;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--body);
  line-height: 1.5;
}

* {
  letter-spacing: 0;
  scrollbar-width: thin;
  scrollbar-color: #377f88 var(--panel);
}

*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

*::-webkit-scrollbar-track {
  background: var(--panel);
}

*::-webkit-scrollbar-thumb {
  border: 2px solid var(--panel);
  border-radius: 6px;
  background: #377f88;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input {
  font: inherit;
}

code, pre {
  font-family: var(--mono);
}

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

.reading-progress {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cyan);
}

.nav {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line-strong);
  background: rgba(9, 10, 13, .97);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-self: start;
}

.nav__mark {
  width: 25px;
  height: 25px;
}

.nav__brand span {
  font: 600 1rem var(--display);
}

.nav__brand em {
  color: var(--cyan);
  font-style: normal;
}

.nav__links {
  display: flex;
  align-items: stretch;
  align-self: stretch;
  gap: 25px;
}

.nav__links a {
  position: relative;
  display: flex;
  align-items: center;
  color: var(--slate);
  font: .66rem var(--mono);
  text-transform: uppercase;
}

.nav__links a:hover,
.nav__links a.is-active {
  color: var(--paper);
}

.nav__links a.is-active::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--cyan);
}

.nav__github {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  justify-self: end;
  padding: 0 14px;
  border: 1px solid var(--lime);
  border-radius: 5px;
  background: var(--lime);
  color: #08110a;
  font: 700 .65rem var(--mono);
  text-transform: uppercase;
}

.compendium-shell {
  height: 100vh;
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  padding-top: var(--nav);
}

.chapter-rail {
  min-height: 0;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line-strong);
  background: #0d0f13;
}

.chapter-rail__head {
  min-height: 72px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 13px 18px;
  border-bottom: 1px solid var(--line-strong);
}

.chapter-rail__head span,
.chapter-rail__status span {
  color: var(--dim);
  font: .56rem var(--mono);
  text-transform: uppercase;
}

.chapter-rail__head strong {
  margin-top: 4px;
  font: 700 .85rem var(--mono);
}

.chapter-rail nav {
  min-height: 0;
  flex: 1;
  overflow: auto;
  padding: 10px;
}

.chapter-rail nav a {
  min-height: 35px;
  display: grid;
  grid-template-columns: 27px 1fr;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  border-left: 2px solid transparent;
  color: var(--dim);
  font: .61rem/1.35 var(--mono);
  transition: color .15s ease, background .15s ease, border-color .15s ease;
}

.chapter-rail nav a span {
  color: #424b5a;
}

.chapter-rail nav a:hover {
  color: var(--paper);
  background: rgba(237, 239, 243, .025);
}

.chapter-rail nav a.is-active {
  border-left-color: var(--cyan);
  background: rgba(77, 240, 255, .045);
  color: var(--paper);
}

.chapter-rail nav a.is-active span {
  color: var(--cyan);
}

.chapter-rail__status {
  padding: 14px 18px;
  border-top: 1px solid var(--line-strong);
}

.chapter-rail__status strong,
.chapter-rail__status small {
  display: block;
  font-family: var(--mono);
}

.chapter-rail__status strong {
  margin-top: 3px;
  color: var(--orange);
  font-size: .69rem;
}

.chapter-rail__status small {
  margin-top: 4px;
  color: var(--dim);
  font-size: .53rem;
}

.rail-toggle,
.rail-scrim {
  display: none;
}

main {
  min-width: 0;
  min-height: 0;
  overflow: auto;
  scroll-behavior: smooth;
  background: #090a0d;
}

section {
  scroll-margin-top: 24px;
}

.snapshot,
.chapter {
  width: min(1280px, calc(100% - 80px));
  margin: 0 auto;
}

.snapshot {
  position: relative;
  min-height: calc(100vh - var(--nav) - 38px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 72px 0 58px;
}

.snapshot::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 66%;
  width: 1px;
  background: var(--line);
  pointer-events: none;
}

.snapshot__signal {
  display: flex;
  gap: 6px;
  margin-bottom: 22px;
}

.snapshot__signal i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pink);
}

.snapshot__signal i:nth-child(2) {
  background: var(--orange);
}

.snapshot__signal i:nth-child(3) {
  background: var(--cyan);
}

.section-code {
  color: var(--cyan);
  font: .64rem var(--mono);
  text-transform: uppercase;
}

.snapshot h1 {
  max-width: 1000px;
  margin-top: 16px;
  font: 700 4.65rem/.98 var(--display);
}

.snapshot h1 span {
  color: var(--pink);
}

.snapshot__lead {
  max-width: 850px;
  margin-top: 26px;
  color: var(--slate);
  font-size: 1.08rem;
  line-height: 1.72;
}

.stale-warning {
  max-width: 950px;
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 24px;
  align-items: start;
  margin-top: 38px;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 138, 61, .55);
  border-bottom: 1px solid var(--line-strong);
}

.stale-warning__flag {
  padding-left: 14px;
  border-left: 3px solid var(--orange);
  color: var(--orange);
  font: 700 .68rem/1.5 var(--mono);
  text-transform: uppercase;
}

.stale-warning p {
  color: #c7cbd3;
  font-size: .83rem;
  line-height: 1.7;
}

.snapshot__metrics {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin-top: 34px;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.snapshot__metrics div {
  min-height: 86px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 15px 18px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.snapshot__metrics strong {
  color: var(--paper);
  font: 700 1.25rem var(--mono);
}

.snapshot__metrics div:nth-child(2) strong {
  color: var(--lime);
}

.snapshot__metrics div:nth-child(3) strong {
  color: var(--pink);
}

.snapshot__metrics div:nth-child(4) strong {
  color: var(--cyan);
}

.snapshot__metrics div:nth-child(5) strong {
  color: var(--orange);
}

.snapshot__metrics span {
  margin-top: 5px;
  color: var(--dim);
  font: .58rem var(--mono);
  text-transform: uppercase;
}

.chapter {
  padding: 88px 0;
  border-top: 1px solid var(--line-strong);
}

.chapter__head {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  align-items: start;
  margin-bottom: 44px;
}

.chapter__number {
  min-height: 49px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  color: var(--cyan);
  font: 700 .76rem var(--mono);
}

.chapter h2 {
  max-width: 900px;
  margin-top: 10px;
  font: 600 2.55rem/1.08 var(--display);
}

.chapter h3 {
  font: 600 1.03rem/1.35 var(--display);
}

.chapter p {
  color: var(--slate);
}

.thesis-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  gap: 56px;
  align-items: start;
}

.thesis-statement {
  max-width: 760px;
}

.thesis-statement p {
  font-size: 1.02rem;
  line-height: 1.78;
}

.thesis-statement p + p {
  margin-top: 18px;
}

.thesis-statement strong {
  color: var(--paper);
}

.contract-box {
  padding: 20px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--panel);
}

.contract-box span {
  display: block;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  color: var(--pink);
  font: .6rem var(--mono);
  text-transform: uppercase;
}

.contract-box strong {
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  color: var(--slate);
  font: 500 .7rem var(--mono);
}

.contract-box strong:last-child {
  border-bottom: 0;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 38px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.status {
  display: inline-flex;
  min-height: 24px;
  align-items: center;
  padding: 3px 7px;
  border: 1px solid currentColor;
  border-radius: 4px;
  font: 600 .53rem var(--mono);
  text-transform: uppercase;
  white-space: nowrap;
}

.status--close {
  color: var(--lime);
}

.status--different {
  color: var(--cyan);
}

.status--native {
  color: var(--pink);
}

.status--partial {
  color: var(--orange);
}

.status--absent {
  color: var(--red);
}

.runtime-compare {
  display: grid;
  grid-template-columns: 1fr 66px 1fr;
  gap: 24px;
  align-items: center;
}

.runtime-column {
  padding: 22px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: #0d0f13;
}

.runtime-column__title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
}

.runtime-column__title span {
  color: var(--orange);
  font-size: .65rem;
  text-transform: uppercase;
}

.runtime-column--cui .runtime-column__title span {
  color: var(--cyan);
}

.runtime-column__title strong {
  color: var(--slate);
  font-size: .6rem;
  font-weight: 500;
}

.flow-node {
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 10px 13px;
  border-left: 2px solid var(--orange);
  background: rgba(255, 138, 61, .035);
  color: var(--paper);
  font: .66rem var(--mono);
}

.runtime-column--cui .flow-node {
  border-left-color: var(--cyan);
  background: rgba(77, 240, 255, .035);
}

.runtime-column > i {
  display: block;
  width: 1px;
  height: 13px;
  margin: 0 0 0 19px;
  background: var(--line-strong);
}

.runtime-divider {
  display: flex;
  align-items: center;
  justify-content: center;
}

.runtime-divider span {
  writing-mode: vertical-rl;
  color: var(--dim);
  font: .58rem var(--mono);
  text-transform: uppercase;
}

.invariant-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 30px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.invariant-band div {
  padding: 17px;
  border-right: 1px solid var(--line);
}

.invariant-band div:last-child {
  border-right: 0;
}

.invariant-band span,
.invariant-band strong {
  display: block;
  font-family: var(--mono);
}

.invariant-band span {
  color: var(--dim);
  font-size: .55rem;
  text-transform: uppercase;
}

.invariant-band strong {
  margin-top: 5px;
  color: var(--lime);
  font-size: .66rem;
}

.chapter-note {
  max-width: 930px;
  margin-top: 28px;
  padding-left: 17px;
  border-left: 2px solid var(--cyan);
  font-size: .88rem;
  line-height: 1.74;
}

.chapter-note code {
  color: var(--lime);
}

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

.code-file {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: #080a0e;
}

.code-file header {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 15px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
}

.code-file header span {
  color: var(--orange);
  font-size: .57rem;
  text-transform: uppercase;
}

.code-file--cui header span {
  color: var(--cyan);
}

.code-file header strong {
  color: var(--slate);
  font-size: .61rem;
  font-weight: 500;
}

.code-file pre {
  min-height: 250px;
  overflow: auto;
  padding: 22px;
  color: #dce3ee;
  font-size: .71rem;
  line-height: 1.72;
}

.tok-tag,
.tok-kw {
  color: var(--pink);
}

.tok-prop,
.tok-type {
  color: var(--cyan);
}

.tok-str {
  color: var(--lime);
}

.translation-table,
.api-map {
  margin-top: 28px;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.translation-row {
  display: grid;
  grid-template-columns: 1fr 1.45fr 110px;
}

.translation-row > span,
.api-map > div {
  min-width: 0;
  padding: 14px 16px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  color: var(--slate);
  font-size: .78rem;
  line-height: 1.62;
}

.translation-row--head > span,
.api-map > div:nth-child(-n + 3) {
  background: var(--panel);
  color: var(--paper);
  font: 600 .59rem var(--mono);
  text-transform: uppercase;
}

.translation-row .status {
  align-self: center;
  justify-self: start;
  margin: 10px 12px;
  padding: 3px 7px;
  font-size: .5rem;
}

.translation-row code,
.api-map code {
  color: var(--lime);
  font-size: .88em;
}

.precedence {
  display: flex;
  align-items: center;
  margin-top: 28px;
  overflow-x: auto;
  padding: 17px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
}

.precedence > span {
  min-width: 155px;
  color: var(--dim);
  font: .56rem/1.5 var(--mono);
  text-transform: uppercase;
}

.precedence div {
  min-width: 83px;
  color: var(--paper);
  font: .58rem var(--mono);
  text-align: center;
}

.precedence b {
  display: block;
  margin-bottom: 4px;
  color: var(--cyan);
}

.precedence i {
  min-width: 18px;
  height: 1px;
  background: var(--line-strong);
}

.delta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 28px;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.delta-grid > div {
  min-height: 190px;
  padding: 22px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.delta-grid h3 {
  margin-top: 17px;
}

.delta-grid p {
  margin-top: 9px;
  font-size: .82rem;
  line-height: 1.67;
}

.aspect-stack,
.render-pipeline,
.motion-model,
.event-route {
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  padding-bottom: 4px;
}

.aspect-stack > div,
.render-pipeline > div,
.motion-model > div,
.event-route__phase {
  min-width: 175px;
  flex: 1;
  padding: 18px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
}

.aspect-stack span,
.aspect-stack strong,
.render-pipeline span,
.render-pipeline strong,
.motion-model span,
.motion-model strong,
.event-route span,
.event-route strong {
  display: block;
  font-family: var(--mono);
}

.aspect-stack span,
.render-pipeline span,
.motion-model span,
.event-route span {
  color: var(--pink);
  font-size: .54rem;
  text-transform: uppercase;
}

.aspect-stack strong,
.render-pipeline strong,
.motion-model strong,
.event-route strong {
  margin-top: 7px;
  color: var(--paper);
  font-size: .65rem;
  line-height: 1.5;
}

.aspect-stack > i,
.render-pipeline > i,
.motion-model > i,
.event-route > i {
  min-width: 22px;
  align-self: center;
  height: 1px;
  background: var(--cyan);
}

.render-pipeline span {
  color: var(--cyan);
}

.motion-model span {
  color: var(--lime);
}

.event-route span {
  color: var(--orange);
}

.comparison-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 28px;
}

.comparison-columns article {
  padding: 24px;
  border-top: 2px solid var(--orange);
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
  background: var(--panel);
}

.comparison-columns article:last-child {
  border-top-color: var(--cyan);
}

.comparison-columns article > span,
.capability-ledger article > span,
.platform-grid div > span,
.source-grid article > span {
  color: var(--dim);
  font: .56rem var(--mono);
  text-transform: uppercase;
}

.comparison-columns h3 {
  margin-top: 12px;
}

.comparison-columns p {
  margin-top: 12px;
  font-size: .83rem;
  line-height: 1.7;
}

.hard-boundary {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  margin-top: 24px;
  padding: 18px 20px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 138, 61, .045);
}

.hard-boundary strong {
  color: var(--orange);
  font: 700 .66rem var(--mono);
  text-transform: uppercase;
}

.hard-boundary span {
  color: var(--slate);
  font-size: .82rem;
  line-height: 1.65;
}

.hard-boundary code {
  color: var(--lime);
}

.api-map {
  display: grid;
  grid-template-columns: .8fr 1.1fr 1.5fr;
}

.api-map > div:nth-child(3n + 1) code {
  color: var(--cyan);
}

.layout-map {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 36px;
}

.layout-map__tree {
  padding: 24px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
}

.layout-map__tree span,
.layout-map__tree strong {
  display: block;
  font-family: var(--mono);
}

.layout-map__tree span {
  color: var(--cyan);
  font-size: .57rem;
  text-transform: uppercase;
}

.layout-map__tree strong {
  margin-top: 7px;
  color: var(--paper);
  font-size: .66rem;
  line-height: 1.55;
}

.layout-map__tree i {
  display: block;
  width: 1px;
  height: 36px;
  margin: 14px 0 14px 10px;
  background: var(--pink);
}

.layout-map__phases {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.layout-map__phases div {
  min-height: 125px;
  padding: 20px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.layout-map__phases b,
.layout-map__phases span,
.layout-map__phases small {
  display: block;
  font-family: var(--mono);
}

.layout-map__phases b {
  color: var(--pink);
  font-size: .57rem;
}

.layout-map__phases span {
  margin-top: 9px;
  color: var(--paper);
  font-size: .72rem;
}

.layout-map__phases small {
  margin-top: 6px;
  color: var(--dim);
  font-size: .56rem;
  line-height: 1.55;
}

.capability-ledger,
.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
  margin-top: 28px;
}

.capability-ledger article,
.platform-grid > div {
  min-height: 150px;
  padding: 22px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.capability-ledger p,
.platform-grid p {
  margin-top: 10px;
  font-size: .82rem;
  line-height: 1.65;
}

.platform-grid {
  grid-template-columns: repeat(3, 1fr);
}

.platform-grid strong {
  display: block;
  margin-top: 10px;
  color: var(--paper);
  font: 600 .77rem var(--mono);
}

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

.control-ledger article {
  border: 1px solid var(--line-strong);
  background: var(--panel);
}

.control-ledger article > header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--line-strong);
}

.control-ledger article > header span,
.control-ledger article > header strong {
  display: block;
  font-family: var(--mono);
}

.control-ledger article > header span {
  color: var(--lime);
  font-size: .55rem;
  text-transform: uppercase;
}

.control-ledger__absent > header span {
  color: var(--red) !important;
}

.control-ledger article > header strong {
  margin-top: 6px;
  font-size: .75rem;
}

.control-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  padding: 18px;
}

.control-tags span {
  padding: 5px 7px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  color: var(--slate);
  font: .58rem var(--mono);
}

.control-ledger__present .control-tags span:nth-child(4n + 1) {
  border-color: rgba(77, 240, 255, .35);
  color: var(--cyan);
}

.control-ledger__absent .control-tags span {
  color: #9a777c;
}

.migration-steps {
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.migration-steps li {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 24px;
  padding: 21px 0;
  border-bottom: 1px solid var(--line-strong);
}

.migration-steps li > span {
  color: var(--cyan);
  font: 700 .65rem var(--mono);
}

.migration-steps strong {
  font: 600 .95rem var(--display);
}

.migration-steps p {
  max-width: 900px;
  margin-top: 7px;
  font-size: .82rem;
  line-height: 1.65;
}

.migration-steps code {
  color: var(--lime);
}

.matrix-chapter {
  width: min(1500px, calc(100% - 50px));
}

.matrix-toolbar {
  position: sticky;
  z-index: 5;
  top: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px;
  border: 1px solid var(--line-strong);
  background: rgba(13, 15, 19, .97);
}

.matrix-search {
  min-width: 250px;
  height: 36px;
  display: flex;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  background: #090b0f;
}

.matrix-search span {
  width: 34px;
  color: var(--cyan);
  font: .7rem var(--mono);
  text-align: center;
}

.matrix-search input {
  min-width: 0;
  flex: 1;
  height: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--paper);
  font: .64rem var(--mono);
}

.matrix-filters {
  display: flex;
  overflow-x: auto;
}

.matrix-filters button {
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-right: 0;
  background: transparent;
  color: var(--dim);
  font: .56rem var(--mono);
  cursor: pointer;
}

.matrix-filters button:first-child {
  border-radius: 5px 0 0 5px;
}

.matrix-filters button:last-child {
  border-right: 1px solid var(--line-strong);
  border-radius: 0 5px 5px 0;
}

.matrix-filters button:hover,
.matrix-filters button.is-active {
  background: rgba(77, 240, 255, .055);
  color: var(--paper);
}

.matrix-count {
  margin-left: auto;
  color: var(--dim);
  font: .56rem var(--mono);
  white-space: nowrap;
}

.matrix-wrap {
  overflow: auto;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.delta-matrix {
  width: 100%;
  min-width: 1050px;
  border-collapse: collapse;
  table-layout: fixed;
}

.delta-matrix th,
.delta-matrix td {
  padding: 14px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

.delta-matrix th {
  position: sticky;
  z-index: 2;
  top: 0;
  background: #14171d;
  color: var(--paper);
  font: 600 .58rem var(--mono);
  text-transform: uppercase;
}

.delta-matrix th:nth-child(1) {
  width: 11%;
}

.delta-matrix th:nth-child(2),
.delta-matrix th:nth-child(3) {
  width: 20%;
}

.delta-matrix th:nth-child(4) {
  width: 11%;
}

.delta-matrix th:nth-child(5) {
  width: 38%;
}

.delta-matrix tbody tr:hover {
  background: rgba(237, 239, 243, .02);
}

.delta-matrix td {
  color: var(--slate);
  font-size: .73rem;
  line-height: 1.58;
}

.delta-matrix td:first-child {
  color: var(--cyan);
  font: 600 .58rem/1.5 var(--mono);
  text-transform: uppercase;
}

.delta-matrix code {
  color: var(--paper);
  font-size: .91em;
}

.matrix-empty {
  padding: 34px;
  border: 1px solid var(--line-strong);
  color: var(--dim);
  font: .68rem var(--mono);
  text-align: center;
}

.source-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.source-grid article {
  min-height: 260px;
  padding: 24px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.source-grid h3 {
  margin-top: 12px;
}

.source-grid p {
  margin: 11px 0 16px;
  font-size: .81rem;
  line-height: 1.67;
}

.source-grid a {
  display: block;
  margin-top: 8px;
  color: var(--cyan);
  font: .59rem var(--mono);
  text-decoration: underline;
  text-decoration-color: rgba(77, 240, 255, .35);
  text-underline-offset: 3px;
}

.final-warning {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 24px;
  margin-top: 36px;
  padding: 22px;
  border: 1px solid var(--orange);
  background: rgba(255, 138, 61, .04);
}

.final-warning span {
  color: var(--orange);
  font: 700 .61rem var(--mono);
  text-transform: uppercase;
}

.final-warning strong {
  font: 600 .85rem/1.6 var(--mono);
}

@media (max-width: 1180px) {
  :root {
    --rail: 226px;
  }

  .snapshot,
  .chapter {
    width: min(100% - 50px, 1100px);
  }

  .snapshot h1 {
    font-size: 3.7rem;
  }

  .snapshot__metrics {
    grid-template-columns: repeat(3, 1fr);
  }

  .platform-grid,
  .source-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 1040px) {
  .nav__links {
    display: none;
  }
}

@media (max-width: 900px) {
  body {
    overflow: hidden;
  }

  .nav {
    grid-template-columns: 1fr auto;
    padding: 0 16px;
  }

  .compendium-shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .chapter-rail {
    position: fixed;
    z-index: 40;
    top: var(--nav);
    bottom: 0;
    left: 0;
    width: min(300px, calc(100vw - 48px));
    transform: translateX(-102%);
    transition: transform .2s ease;
  }

  body.is-rail-open .chapter-rail {
    transform: translateX(0);
  }

  .rail-toggle {
    position: fixed;
    z-index: 35;
    right: 16px;
    bottom: 16px;
    display: inline-flex;
    min-height: 40px;
    align-items: center;
    justify-content: center;
    padding: 0 13px;
    border: 1px solid var(--cyan);
    border-radius: 5px;
    background: #0d0f13;
    color: var(--paper);
    font: .61rem var(--mono);
    cursor: pointer;
  }

  .rail-scrim {
    position: fixed;
    z-index: 30;
    inset: var(--nav) 0 0;
    width: 100%;
    border: 0;
    background: rgba(0, 0, 0, .72);
  }

  body.is-rail-open .rail-scrim {
    display: block;
  }

  .snapshot,
  .chapter,
  .matrix-chapter {
    width: calc(100% - 42px);
  }

  .snapshot {
    min-height: auto;
    padding: 60px 0;
  }

  .snapshot::before {
    display: none;
  }

  .thesis-grid,
  .layout-map {
    grid-template-columns: 1fr;
  }

  .runtime-compare {
    grid-template-columns: 1fr;
  }

  .runtime-divider span {
    writing-mode: initial;
  }

  .invariant-band {
    grid-template-columns: repeat(2, 1fr);
  }

  .code-pair,
  .comparison-columns,
  .control-ledger {
    grid-template-columns: 1fr;
  }

  .translation-row {
    grid-template-columns: .8fr 1.2fr 90px;
  }

  .matrix-toolbar {
    position: static;
    flex-wrap: wrap;
  }

  .matrix-search {
    min-width: 100%;
  }

  .matrix-count {
    margin-left: 0;
  }
}

@media (max-width: 620px) {
  .nav__brand span {
    font-size: .9rem;
  }

  .nav__github {
    min-height: 34px;
    padding: 0 10px;
    font-size: .58rem;
  }

  .snapshot,
  .chapter,
  .matrix-chapter {
    width: calc(100% - 30px);
  }

  .snapshot {
    padding: 46px 0;
  }

  .snapshot h1 {
    font-size: 2.65rem;
  }

  .snapshot__lead {
    font-size: .95rem;
  }

  .stale-warning {
    grid-template-columns: 1fr;
  }

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

  .snapshot__metrics div:last-child {
    grid-column: 1 / -1;
  }

  .chapter {
    padding: 68px 0;
  }

  .chapter__head {
    grid-template-columns: 42px 1fr;
    gap: 15px;
  }

  .chapter__number {
    min-height: 40px;
  }

  .chapter h2 {
    font-size: 1.85rem;
  }

  .invariant-band,
  .delta-grid,
  .layout-map__phases,
  .capability-ledger,
  .platform-grid,
  .source-grid {
    grid-template-columns: 1fr;
  }

  .code-file pre {
    min-height: 0;
    padding: 18px;
    font-size: .64rem;
  }

  .translation-table {
    overflow-x: auto;
  }

  .translation-row {
    min-width: 720px;
  }

  .api-map {
    grid-template-columns: 1fr;
  }

  .api-map > div:nth-child(-n + 3) {
    display: none;
  }

  .api-map > div:nth-child(3n + 1) {
    padding-bottom: 6px;
    border-bottom: 0;
    color: var(--cyan);
  }

  .api-map > div:nth-child(3n + 2) {
    padding-top: 6px;
    padding-bottom: 6px;
    border-bottom: 0;
  }

  .api-map > div:nth-child(3n + 3) {
    padding-top: 6px;
    padding-bottom: 20px;
  }

  .hard-boundary,
  .final-warning {
    grid-template-columns: 1fr;
  }

  .migration-steps li {
    grid-template-columns: 38px 1fr;
    gap: 14px;
  }

  .matrix-filters {
    width: 100%;
  }

  .matrix-filters button {
    flex: 1;
    padding: 0 7px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}