:root {
  --ink: #171612;
  --ink-soft: #565149;
  --paper: #f2efe6;
  --panel: #fbfaf5;
  --line: rgba(23, 22, 18, 0.3);
  --line-dark: #171612;
  --accent: #ef4b2c;
  --accent-dark: #a82d19;
  --accent-pale: #f9e8e3;
  --warning: #d18a20;
  --cyan: #246c82;
  --cyan-pale: #e7f0f1;
  --mono: Consolas, "Cascadia Mono", "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", "Malgun Gothic", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.72;
}

a {
  color: inherit;
}

h1,
h2,
h3,
p,
code,
span,
strong {
  overflow-wrap: anywhere;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  min-height: 64px;
  padding: 0 clamp(18px, 4vw, 54px);
  color: var(--ink);
  background: rgba(242, 239, 230, 0.97);
  border-bottom: 1px solid rgba(23, 22, 18, 0.72);
}

.topbar a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  text-decoration: none;
}

.topbar a:first-child::before {
  width: 11px;
  height: 11px;
  content: "";
  background: var(--accent);
  transform: skew(-12deg);
}

.topbar a:last-child {
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 11px;
}

.hero {
  color: var(--ink);
  background: var(--paper);
  border-bottom: 1px solid rgba(23, 22, 18, 0.72);
}

.hero-inner,
.page-grid,
.index-layout,
footer {
  width: min(1240px, calc(100% - 48px));
  margin: 0 auto;
}

.hero-inner {
  padding: 54px 0 42px;
}

.index-hero .hero-inner {
  padding-top: 66px;
}

.eyebrow,
.section-label {
  margin: 0 0 10px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  max-width: 980px;
  margin: 0;
  font-family: "Arial Black", "Malgun Gothic", sans-serif;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.14;
}

.lead {
  max-width: 930px;
  margin: 18px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
}

.baseline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 1100px;
  margin: 30px 0 0;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.baseline div {
  min-width: 0;
  padding: 12px 16px;
  border-right: 1px solid var(--line);
}

.baseline div:first-child {
  padding-left: 0;
}

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

.baseline dt {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
}

.baseline dd {
  margin: 3px 0 0;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.page-grid,
.index-layout {
  display: grid;
  grid-template-columns: 238px minmax(0, 1fr);
  gap: 36px;
  padding: 40px 0 88px;
}

.page-grid > article,
.index-layout > article,
.toc {
  min-width: 0;
}

.toc {
  position: sticky;
  top: 82px;
  align-self: start;
  padding: 4px 22px 4px 0;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
}

.toc strong {
  display: block;
  margin-bottom: 9px;
  padding-bottom: 8px;
  color: var(--accent-dark);
  border-bottom: 0;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
}

.toc a {
  display: block;
  padding: 6px 0;
  color: var(--ink-soft);
  border-bottom: 1px solid rgba(23, 22, 18, 0.15);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
}

.toc a:hover,
.toc a:focus-visible {
  color: var(--accent-dark);
}

article > section {
  scroll-margin-top: 82px;
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}

article > section:last-child {
  border-bottom: 0;
}

h2 {
  margin: 0 0 18px;
  font-family: "Arial Black", "Malgun Gothic", sans-serif;
  font-size: 29px;
  line-height: 1.25;
}

h3 {
  margin: 0 0 9px;
  font-size: 18px;
  line-height: 1.4;
}

p {
  margin: 0 0 15px;
  color: var(--ink-soft);
}

.opening-note,
.version-warning {
  padding: 20px 22px 6px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 6px solid var(--accent);
}

.version-warning {
  margin-top: 16px;
  border-left-color: var(--warning);
}

.version-warning strong {
  display: block;
  margin-bottom: 5px;
}

.technical-figure {
  margin: 18px 0 24px;
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--line-dark);
}

.technical-figure figcaption {
  margin-bottom: 18px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 800;
}

.technical-figure > p {
  margin: 16px 0 0;
  font-size: 13px;
}

.concept-figure {
  margin: 22px 0 34px;
  padding: 22px;
  background: var(--panel);
  border: 1px solid var(--line-dark);
}

.concept-figure figcaption {
  color: var(--ink);
  font-family: "Arial Black", "Malgun Gothic", sans-serif;
  font-size: 18px;
  line-height: 1.45;
}

.concept-caption {
  margin: 7px 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.concept-footer {
  margin: 18px 0 0;
  padding: 12px 14px;
  color: var(--ink);
  background: var(--accent-pale);
  border-left: 5px solid var(--accent);
  font-size: 13px;
  font-weight: 700;
}

.payload-relocation-visual {
  padding: 18px;
  background: rgba(23, 22, 18, 0.025);
  border: 1px solid var(--line);
}

.payload-layout {
  display: grid;
  grid-template-columns: minmax(250px, 1fr) minmax(190px, 0.68fr) minmax(250px, 1fr);
  gap: 14px;
  align-items: stretch;
}

.payload-map {
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--line-dark);
}

.payload-map > header {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  min-height: 82px;
  border-bottom: 1px solid var(--line-dark);
}

.payload-map > header > span {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  color: #fff;
  background: var(--ink);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
  text-align: center;
}

.payload-map[data-side="after"] > header > span {
  background: var(--accent-dark);
}

.payload-map > header > div {
  padding: 11px 13px;
}

.payload-map h3,
.payload-map header p {
  margin: 0;
}

.payload-map h3 {
  font-size: 14px;
  line-height: 1.35;
}

.payload-map header p {
  margin-top: 4px;
  color: var(--ink-soft);
  font-size: 11px;
  line-height: 1.45;
}

.payload-map-body {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  min-height: 650px;
}

.payload-address-axis {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 11px 4px;
  background: rgba(23, 22, 18, 0.04);
  border-right: 1px solid var(--line-dark);
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 800;
}

.payload-address-axis b {
  color: var(--accent-dark);
  font-size: 22px;
}

.payload-regions {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.payload-region {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-content: center;
  flex: var(--region-weight) 1 0;
  min-height: 82px;
  padding: 10px 11px;
  border-bottom: 1px solid var(--line-dark);
}

.payload-region:last-child {
  border-bottom: 0;
}

.payload-region strong,
.payload-region code,
.payload-region p {
  min-width: 0;
}

.payload-region strong {
  padding-right: 8px;
  font-size: 12px;
  line-height: 1.35;
}

.payload-region code {
  align-self: start;
  color: var(--ink-soft);
  font-size: 9px;
  font-weight: 700;
  text-align: right;
}

.payload-region p {
  grid-column: 1 / -1;
  margin: 7px 0 0;
  color: var(--ink-soft);
  font-size: 10px;
  line-height: 1.45;
}

.payload-region[data-tone="protected"] {
  background: rgba(23, 22, 18, 0.08);
  border-top: 5px solid var(--ink);
}

.payload-region[data-tone="kernel"] {
  background: var(--accent-pale);
  border-left: 6px solid var(--accent);
}

.payload-region[data-tone="initrd"] {
  background: var(--cyan-pale);
  border-left: 6px solid var(--cyan);
}

.payload-region[data-tone="dtb"] {
  background: rgba(209, 138, 32, 0.16);
  border-left: 6px solid var(--warning);
}

.payload-region[data-tone="free"] {
  background: var(--panel);
}

.payload-region[data-tone="base"] {
  background: rgba(23, 22, 18, 0.04);
  border-bottom: 5px solid var(--ink);
}

.payload-moves {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
  min-width: 0;
  padding: 86px 0 16px;
}

.payload-move {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--line-dark);
}

.payload-move::before,
.payload-move::after {
  position: absolute;
  top: 50%;
  width: 15px;
  height: 1px;
  content: "";
  background: var(--line-dark);
}

.payload-move::before {
  left: -15px;
}

.payload-move::after {
  right: -15px;
}

.payload-move strong,
.payload-move code,
.payload-move span {
  min-width: 0;
  padding: 7px 8px;
}

.payload-move strong {
  grid-column: 1 / -1;
  color: #fff;
  background: var(--ink);
  font-size: 11px;
  text-align: center;
}

.payload-move[data-tone="kernel"] strong {
  background: var(--accent-dark);
}

.payload-move[data-tone="initrd"] strong {
  background: var(--cyan);
}

.payload-move[data-tone="dtb"] strong {
  color: var(--ink);
  background: #edc86f;
}

.payload-move code {
  font-size: 9px;
  text-align: center;
}

.payload-move span {
  grid-column: 1 / -1;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 9px;
  font-weight: 700;
  text-align: center;
}

.payload-move span b {
  color: var(--accent-dark);
}

.payload-handoff {
  display: grid;
  grid-template-columns: 160px repeat(4, minmax(0, 1fr));
  margin-top: 16px;
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.payload-handoff > strong,
.payload-handoff > div {
  min-width: 0;
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.payload-handoff > strong {
  display: flex;
  align-items: center;
  padding: 10px;
  color: #fff;
  background: var(--ink);
  font-family: var(--mono);
  font-size: 10px;
}

.payload-handoff > div {
  display: grid;
  grid-template-rows: auto auto 1fr;
  padding: 9px 10px;
}

.payload-handoff code {
  color: var(--accent-dark);
  font-size: 10px;
  font-weight: 800;
}

.payload-handoff b {
  margin-top: 3px;
  font-size: 11px;
}

.payload-handoff span {
  margin-top: 5px;
  color: var(--ink-soft);
  font-size: 9px;
  line-height: 1.4;
}

.relocation-reason-visual {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.relocation-reason-visual section {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  min-width: 0;
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.relocation-reason-visual section > span {
  display: flex;
  justify-content: center;
  padding-top: 18px;
  color: #fff;
  background: var(--ink);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
}

.relocation-reason-visual section > div {
  padding: 14px;
}

.relocation-reason-visual h3 {
  margin: 0 0 10px;
  font-size: 14px;
}

.relocation-reason-visual p {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 8px;
  margin: 5px 0;
  color: var(--ink-soft);
  font-size: 11px;
}

.relocation-reason-visual p b {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 9px;
}

.relocation-reason-visual code {
  display: block;
  margin-top: 12px;
  padding: 8px;
  color: var(--ink);
  background: var(--cyan-pale);
  border-left: 4px solid var(--cyan);
  font-size: 10px;
  font-weight: 700;
}

.memory-map-visual {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  max-width: 820px;
  margin: 0 auto;
  border: 1px solid var(--line-dark);
}

.memory-address-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  grid-row: 1;
  padding: 14px 10px;
  color: var(--ink-soft);
  background: rgba(23, 22, 18, 0.04);
  border-right: 1px solid var(--line-dark);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
  text-align: center;
}

.memory-address-label-bottom {
  display: none;
}

.memory-zones {
  grid-column: 2;
}

.memory-zone {
  display: grid;
  grid-template-columns: minmax(170px, 0.8fr) minmax(0, 1.2fr);
  min-height: 54px;
  border-bottom: 1px solid var(--line);
}

.memory-zone:last-child {
  border-bottom: 0;
}

.memory-zone strong,
.memory-zone span {
  display: flex;
  align-items: center;
  min-width: 0;
  padding: 10px 13px;
}

.memory-zone strong {
  border-right: 1px solid var(--line);
  font-size: 13px;
}

.memory-zone span {
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 11px;
}

.memory-zone[data-tone="marker"] {
  border-top: 5px solid var(--ink);
}

.memory-zone[data-tone="guard"] {
  background: rgba(209, 138, 32, 0.15);
}

.memory-zone[data-tone="system"],
.memory-zone[data-tone="device"] {
  background: var(--cyan-pale);
}

.memory-zone[data-tone="image"] {
  background: var(--accent-pale);
  border-left: 6px solid var(--accent);
}

.memory-zone[data-tone="runtime"] {
  background: rgba(209, 138, 32, 0.08);
}

.memory-zone[data-tone="metadata"] {
  background: rgba(23, 22, 18, 0.035);
}

.memory-zone[data-tone="stack"] {
  border-left: 6px solid var(--cyan);
}

.memory-zone[data-tone="free"] {
  min-height: 86px;
  border-bottom: 5px solid var(--ink);
}

.concept-pipeline {
  display: flex;
  align-items: stretch;
  padding: 18px;
  overflow-x: auto;
  background: rgba(23, 22, 18, 0.025);
  border: 1px solid var(--line);
}

.concept-pipeline-step {
  display: grid;
  grid-template-rows: auto 1fr;
  flex: 1 0 118px;
  min-height: 104px;
  background: var(--panel);
  border: 1px solid var(--line-dark);
}

.concept-pipeline-step span {
  padding: 5px 8px;
  color: var(--accent-dark);
  background: var(--accent-pale);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 800;
}

.concept-pipeline-step strong {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 10px;
  font-size: 12px;
  line-height: 1.4;
  text-align: center;
}

.concept-arrow {
  display: flex;
  align-items: center;
  padding: 0 7px;
  color: var(--accent-dark);
  font-family: var(--mono);
  font-weight: 900;
}

.concept-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.concept-compare > section {
  min-width: 0;
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.concept-compare h3 {
  margin: 0;
  padding: 11px 13px;
  color: var(--ink);
  background: var(--accent-pale);
  border-bottom: 1px solid var(--line-dark);
  font-family: var(--mono);
  font-size: 12px;
}

.concept-compare section:last-child h3 {
  background: var(--cyan-pale);
}

.concept-compare p {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  margin: 0;
  border-bottom: 1px solid var(--line);
}

.concept-compare p:last-child {
  border-bottom: 0;
}

.concept-compare p span,
.concept-compare p strong {
  padding: 9px 10px;
}

.concept-compare p span {
  color: var(--accent-dark);
  border-right: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 9px;
}

.concept-compare p strong {
  font-size: 12px;
}

.dependency-visual {
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.dependency-visual > div {
  display: grid;
  grid-template-columns: 42px minmax(130px, 0.8fr) 34px minmax(150px, 1fr) 34px minmax(130px, 0.8fr);
  align-items: stretch;
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.dependency-visual span,
.dependency-visual code,
.dependency-visual b,
.dependency-visual strong {
  display: flex;
  align-items: center;
  min-width: 0;
  padding: 10px;
  border-right: 1px solid var(--line);
}

.dependency-visual span {
  color: var(--accent-dark);
  font-family: var(--mono);
  font-size: 9px;
}

.dependency-visual code {
  font-family: var(--mono);
  font-size: 11px;
}

.dependency-visual b {
  justify-content: center;
  padding: 6px;
  color: var(--accent-dark);
}

.dependency-visual strong {
  background: var(--accent-pale);
  font-size: 12px;
}

.dependency-visual > div > :last-child {
  border-right: 0;
}

.equation-visual {
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.equation-visual > div {
  display: grid;
  grid-template-columns: 42px 92px minmax(230px, 1fr) minmax(180px, 0.9fr);
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.equation-visual span,
.equation-visual strong,
.equation-visual code,
.equation-visual p {
  min-width: 0;
  margin: 0;
  padding: 10px 12px;
  border-right: 1px solid var(--line);
}

.equation-visual span {
  color: var(--accent-dark);
  font-family: var(--mono);
  font-size: 9px;
}

.equation-visual strong {
  color: var(--ink);
  background: var(--accent-pale);
  font-family: var(--mono);
  font-size: 11px;
}

.equation-visual code {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
}

.equation-visual p {
  border-right: 0;
  font-size: 12px;
}

.structure-diagram {
  padding: 24px;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
}

.structure-rail {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 8px;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
  text-align: center;
}

.structure-rail span {
  padding: 5px;
  border-bottom: 1px solid var(--line-dark);
}

.structure-blocks {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-items: stretch;
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.structure-block {
  position: relative;
  min-height: 116px;
  padding: 16px 14px;
  background: var(--panel);
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.structure-block::after {
  position: absolute;
  top: 50%;
  right: -10px;
  z-index: 2;
  width: 18px;
  height: 18px;
  content: "";
  background: var(--panel);
  border-top: 1px solid var(--line-dark);
  border-right: 1px solid var(--line-dark);
  transform: translateY(-50%) rotate(45deg);
}

.structure-block:last-child::after {
  display: none;
}

.structure-block[data-tone="1"],
.structure-block[data-tone="3"] {
  background: var(--cyan-pale);
}

.structure-block[data-tone="1"]::after,
.structure-block[data-tone="3"]::after {
  background: var(--cyan-pale);
}

.structure-block > span {
  display: block;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
}

.structure-block strong {
  display: block;
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.45;
}

.structure-invariant {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  margin-top: 16px;
  border: 1px solid var(--line-dark);
}

.structure-invariant > span {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  color: #fff;
  background: var(--ink);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
}

.structure-invariant p {
  margin: 0;
  padding: 12px 14px;
  background: var(--panel);
  font-size: 13px;
}

.flow-diagram {
  display: flex;
  align-items: stretch;
  min-width: 0;
  padding: 24px;
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--line);
}

.flow-step {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1 0 126px;
  min-height: 94px;
  padding: 18px 12px 12px;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--line-dark);
}

.flow-step::before {
  position: absolute;
  top: 5px;
  left: 7px;
  color: var(--accent-dark);
  content: attr(data-step);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 800;
}

.flow-step:first-child {
  border-top: 5px solid var(--accent);
}

.flow-step:last-of-type {
  border-bottom: 5px solid var(--ink);
}

.flow-step strong {
  font-size: 12px;
  line-height: 1.4;
}

.flow-arrow {
  display: flex;
  align-items: center;
  padding: 0 7px;
  color: var(--accent-dark);
  font-family: var(--mono);
  font-weight: 900;
}

#source > p a {
  color: var(--accent-dark);
  font-weight: 800;
}

.source-meta {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  background: var(--panel);
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.source-meta span,
.source-meta code {
  min-width: 0;
  padding: 8px 10px;
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.source-meta span {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.source-meta code {
  color: var(--ink-soft);
  font-size: 12px;
}

.source-code {
  margin: 14px 0 0;
  padding: 0;
  overflow: auto;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line-dark);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  tab-size: 8;
}

.source-line {
  display: grid;
  grid-template-columns: 58px minmax(max-content, 1fr);
  min-width: max-content;
}

.source-line:nth-child(even) {
  background: rgba(23, 22, 18, 0.035);
}

.source-no,
.source-text {
  display: block;
  white-space: pre;
}

.source-no {
  padding: 0 11px;
  color: var(--accent-dark);
  text-align: right;
  background: var(--accent-pale);
  border-right: 1px solid var(--line);
  user-select: none;
}

.source-text {
  padding: 0 13px;
}

.line-note-list {
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.line-note {
  display: grid;
  grid-template-columns: minmax(250px, 0.9fr) minmax(0, 1.25fr);
  background: var(--panel);
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.line-note-code {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  min-width: 0;
  background: rgba(23, 22, 18, 0.035);
  border-right: 1px solid var(--line);
}

.line-note-code > span {
  padding: 12px 8px;
  color: var(--accent-dark);
  background: var(--accent-pale);
  border-right: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
  text-align: right;
}

.line-note-code code {
  align-self: center;
  padding: 11px 12px;
  font-family: var(--mono);
  font-size: 11px;
  white-space: pre-wrap;
}

.line-note > p {
  align-self: center;
  margin: 0;
  padding: 11px 14px;
  font-size: 13px;
  line-height: 1.62;
}

.supplement-list {
  border-top: 3px solid var(--ink);
}

.supplement-source {
  padding: 30px 0 44px;
  border-bottom: 1px solid var(--line-dark);
}

.supplement-source > h3:first-child {
  margin-bottom: 6px;
  font-family: "Arial Black", "Malgun Gothic", sans-serif;
  font-size: 21px;
}

.supplement-source > h3:not(:first-child) {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.supplement-source > p a {
  color: var(--accent-dark);
  font-weight: 800;
}

.deep-dive-list h3 {
  max-width: 760px;
  font-family: "Arial Black", "Malgun Gothic", sans-serif;
}

.deep-dive-list p {
  max-width: 880px;
}

.state-ledger-table {
  min-width: 920px;
}

.experiment-list em {
  color: var(--ink);
  font-style: normal;
  font-weight: 700;
}

.detail-sections {
  border-top: 1px solid var(--line-dark);
}

.detail-sections > section {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.detail-sections > section > span {
  color: var(--accent-dark);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 800;
}

.detail-sections p:last-child {
  margin-bottom: 0;
}

.detail-sections code,
table code {
  padding: 1px 4px;
  color: var(--accent-dark);
  background: var(--accent-pale);
  font-family: var(--mono);
  font-size: 0.92em;
}

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

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

th,
td {
  padding: 12px 13px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  text-align: left;
  vertical-align: top;
}

th:last-child,
td:last-child {
  border-right: 0;
}

tr:last-child td {
  border-bottom: 0;
}

th {
  color: var(--ink);
  background: rgba(239, 75, 44, 0.1);
  font-family: var(--mono);
  font-size: 11px;
}

.failure-note {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 4px solid var(--warning);
  font-size: 13px;
}

.experiment-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-dark);
}

.experiment-list li {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.experiment-list li > span {
  color: var(--accent-dark);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
}

.experiment-list strong {
  display: block;
  margin-bottom: 4px;
}

.experiment-list p {
  margin: 0;
  font-size: 13px;
}

.reference-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.reference-list a {
  display: flex;
  flex-direction: column;
  min-height: 104px;
  padding: 17px;
  background: var(--panel);
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  text-decoration: none;
}

.reference-list a:hover,
.reference-list a:focus-visible {
  background: var(--accent-pale);
}

.reference-list span {
  margin-top: 6px;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 11px;
}

.page-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.page-nav a {
  display: flex;
  flex-direction: column;
  padding: 15px;
  background: var(--panel);
  border: 1px solid var(--line-dark);
  text-decoration: none;
}

.page-nav a:last-child {
  text-align: right;
}

.page-nav span {
  color: var(--accent-dark);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
}

.page-nav strong {
  margin-top: 4px;
  font-size: 13px;
}

.comparison-section {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
  padding: 52px 0 10px;
}

.comparison-heading {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1.3fr);
  column-gap: 36px;
  padding-bottom: 22px;
  border-bottom: 3px solid var(--ink);
}

.comparison-heading .section-label {
  grid-column: 1 / -1;
}

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

.project-comparison {
  border-left: 1px solid var(--line-dark);
}

.comparison-row {
  display: grid;
  grid-template-columns: 0.72fr repeat(4, minmax(0, 1fr));
  background: var(--panel);
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.comparison-row > div {
  min-width: 0;
  padding: 18px 16px 8px;
  border-right: 1px solid var(--line);
}

.comparison-row > div:last-child {
  border-right: 0;
}

.comparison-row strong {
  display: block;
  margin-bottom: 7px;
  color: var(--accent-dark);
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
}

.comparison-row p {
  font-size: 12px;
  line-height: 1.62;
}

.comparison-name {
  background: rgba(23, 22, 18, 0.035);
}

.comparison-name > span {
  color: var(--accent-dark);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
}

.comparison-name h3 {
  margin-top: 18px;
  font-family: "Arial Black", "Malgun Gothic", sans-serif;
  font-size: 21px;
}

.comparison-name p {
  color: var(--ink-soft);
  font-size: 11px;
}

.scope-note {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  margin-top: 14px;
  border: 1px solid var(--line-dark);
}

.scope-note strong,
.scope-note p {
  margin: 0;
  padding: 14px 16px;
}

.scope-note strong {
  color: #fff;
  background: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
}

.scope-note p {
  background: var(--accent-pale);
  font-size: 12px;
}

.series-section {
  scroll-margin-top: 82px;
  margin-bottom: 68px;
}

.series-section > header {
  display: grid;
  grid-template-columns: 120px minmax(180px, 0.45fr) minmax(0, 1fr);
  align-items: start;
  gap: 18px;
  padding-bottom: 20px;
  border-bottom: 3px solid var(--ink);
}

.series-section > header > p {
  margin: 7px 0 0;
  color: var(--accent-dark);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
}

.series-section > header h2 {
  margin: 0;
}

.series-section > header > span {
  color: var(--ink-soft);
  font-size: 14px;
}

.topic-list {
  border-left: 1px solid var(--line);
}

.topic-row {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr) 36px;
  min-height: 132px;
  text-decoration: none;
  background: var(--panel);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.topic-row:hover,
.topic-row:focus-visible {
  background: var(--accent-pale);
}

.topic-number {
  padding: 20px 11px;
  color: var(--accent-dark);
  border-right: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
}

.topic-row > div {
  min-width: 0;
  padding: 17px 18px;
}

.topic-row small {
  display: block;
  margin-bottom: 4px;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 10px;
}

.topic-row strong {
  display: block;
  font-size: 17px;
}

.topic-row p {
  margin: 5px 0 0;
  font-size: 13px;
  line-height: 1.55;
}

.topic-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-dark);
  border-left: 1px solid var(--line);
  font-weight: 900;
}

footer {
  display: flex;
  justify-content: space-between;
  padding: 20px 0 32px;
  border-top: 1px solid var(--line-dark);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
}

footer a {
  text-decoration: none;
}

@media (max-width: 880px) {
  .page-grid,
  .index-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
    display: block;
    padding: 0 0 18px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .toc strong {
    grid-column: 1 / -1;
  }

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

  .baseline div:nth-child(2) {
    border-right: 0;
  }

  .baseline div:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

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

  .structure-block:nth-child(2)::after,
  .structure-block:last-child::after {
    display: none;
  }

  .line-note {
    grid-template-columns: 1fr;
  }

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

  .series-section > header {
    grid-template-columns: 90px minmax(0, 1fr);
  }

  .comparison-heading {
    grid-template-columns: 1fr;
  }

  .comparison-row {
    grid-template-columns: 170px repeat(4, minmax(210px, 1fr));
    overflow-x: auto;
  }

  .payload-layout {
    grid-template-columns: minmax(230px, 1fr) minmax(180px, 0.7fr) minmax(230px, 1fr);
    overflow-x: auto;
  }

  .payload-layout > * {
    min-width: 230px;
  }

  .payload-moves {
    min-width: 180px;
  }

  .payload-handoff {
    grid-template-columns: 140px repeat(4, minmax(150px, 1fr));
    overflow-x: auto;
  }

  .dependency-visual,
  .equation-visual {
    overflow-x: auto;
  }

  .dependency-visual > div {
    min-width: 760px;
  }

  .equation-visual > div {
    min-width: 720px;
  }

  .series-section > header > span {
    grid-column: 1 / -1;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 15px;
  }

  .hero-inner,
  .page-grid,
  .index-layout,
  .comparison-section,
  footer {
    width: min(100% - 28px, 1200px);
  }

  .hero-inner {
    padding: 42px 0 34px;
  }

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 24px;
  }

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

  .baseline div,
  .baseline div:nth-child(2) {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-right: 0;
  }

  .baseline div:first-child {
    border-top: 0;
  }

  .technical-figure {
    padding: 13px;
  }

  .concept-figure {
    padding: 13px;
  }

  .concept-figure figcaption {
    font-size: 16px;
  }

  .payload-relocation-visual {
    padding: 10px;
  }

  .payload-layout {
    grid-template-columns: 1fr;
    gap: 12px;
    overflow: visible;
  }

  .payload-layout > *,
  .payload-moves {
    min-width: 0;
  }

  .payload-map-body {
    min-height: 620px;
  }

  .payload-moves {
    padding: 0 20px;
  }

  .payload-move::before,
  .payload-move::after {
    top: auto;
    right: auto;
    left: 50%;
    width: 1px;
    height: 13px;
  }

  .payload-move::before {
    top: -13px;
  }

  .payload-move::after {
    bottom: -13px;
  }

  .payload-handoff {
    grid-template-columns: 1fr;
    overflow: visible;
  }

  .payload-handoff > strong {
    min-height: 48px;
  }

  .payload-handoff > div {
    grid-template-columns: 48px minmax(0, 1fr);
    grid-template-rows: auto auto;
  }

  .payload-handoff > div span {
    grid-column: 1 / -1;
  }

  .relocation-reason-visual {
    grid-template-columns: 1fr;
  }

  .relocation-reason-visual p {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .memory-map-visual {
    grid-template-columns: 76px minmax(0, 1fr);
  }

  .memory-address-label {
    padding: 10px 5px;
    font-size: 8px;
  }

  .memory-zone {
    grid-template-columns: 1fr;
  }

  .memory-zone strong {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .concept-pipeline {
    flex-direction: column;
    padding: 12px;
    overflow: hidden;
  }

  .concept-pipeline-step {
    flex-basis: auto;
    min-height: 76px;
  }

  .concept-arrow {
    justify-content: center;
    padding: 3px;
    transform: rotate(90deg);
  }

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

  .dependency-visual,
  .equation-visual {
    overflow: visible;
  }

  .dependency-visual > div {
    grid-template-columns: 36px minmax(0, 1fr);
    min-width: 0;
  }

  .dependency-visual b {
    transform: rotate(90deg);
  }

  .dependency-visual span,
  .dependency-visual code,
  .dependency-visual b,
  .dependency-visual strong {
    border-bottom: 1px solid var(--line);
  }

  .equation-visual > div {
    grid-template-columns: 36px 68px minmax(0, 1fr);
    min-width: 0;
  }

  .equation-visual p {
    grid-column: 1 / -1;
    border-top: 1px solid var(--line);
  }

  .structure-diagram,
  .flow-diagram {
    padding: 14px;
  }

  .structure-rail {
    display: none;
  }

  .structure-blocks {
    grid-template-columns: 1fr;
  }

  .structure-block::after {
    display: none;
  }

  .structure-block {
    min-height: 84px;
  }

  .structure-invariant {
    grid-template-columns: 1fr;
  }

  .flow-diagram {
    flex-direction: column;
    overflow: hidden;
  }

  .flow-step {
    flex-basis: auto;
    min-height: 72px;
  }

  .flow-arrow {
    justify-content: center;
    padding: 4px;
    transform: rotate(90deg);
  }

  .source-meta {
    grid-template-columns: 1fr;
  }

  .source-meta span,
  .source-meta code {
    border-right: 0;
  }

  .detail-sections > section,
  .experiment-list li {
    grid-template-columns: 40px minmax(0, 1fr);
  }

  .reference-list,
  .page-nav {
    grid-template-columns: 1fr;
  }

  .page-nav a:last-child {
    text-align: left;
  }

  .series-section > header {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .series-section > header > span {
    grid-column: auto;
  }

  .comparison-section {
    padding-top: 38px;
  }

  .project-comparison {
    border-top: 1px solid var(--line-dark);
  }

  .comparison-row {
    grid-template-columns: 1fr;
    overflow: visible;
  }

  .comparison-row > div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .comparison-row > div:last-child {
    border-bottom: 0;
  }

  .scope-note {
    grid-template-columns: 1fr;
  }

  .topic-row {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .topic-arrow {
    display: none;
  }

  .topic-row > div {
    padding: 15px 13px;
  }
}