:root {
  --bg: #080b0a;
  --surface: #0d110f;
  --surface-2: #111713;
  --surface-3: #172019;
  --line: #253128;
  --line-bright: #36533f;
  --text: #dbe7df;
  --text-bright: #f1f8f3;
  --muted: #849188;
  --green: #42f58d;
  --green-soft: #80eda9;
  --green-dim: rgba(66, 245, 141, 0.12);
  --amber: #e7c46a;
  --header-height: 66px;
  --sidebar-width: 260px;
  --content-width: 800px;
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 30px);
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% -20%, rgba(66, 245, 141, 0.08), transparent 42rem),
    var(--bg);
  color: var(--text);
  line-height: 1.75;
}

a {
  color: inherit;
}

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

.reading-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: 2px;
  background: rgba(255, 255, 255, 0.03);
}

.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--green);
  box-shadow: 0 0 12px var(--green);
  transform: scaleX(0);
  transform-origin: left;
  will-change: transform;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 max(24px, calc((100vw - 1280px) / 2));
  border-bottom: 1px solid rgba(72, 94, 79, 0.55);
  background: rgba(8, 11, 10, 0.88);
  backdrop-filter: blur(16px);
}

.brand,
.header-actions,
.github-link {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  color: var(--text-bright);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 30px;
  place-items: center;
  border: 1px solid var(--line-bright);
  color: var(--green);
  background: var(--green-dim);
}

.header-actions {
  gap: 24px;
  font-size: 13px;
}

.plain-link {
  color: var(--muted);
  text-decoration: none;
}

.plain-link:hover {
  color: var(--green-soft);
}

.github-link {
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-bright);
  color: var(--text-bright);
  text-decoration: none;
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease;
}

.github-link:hover {
  border-color: var(--green);
  color: var(--green);
  background: var(--green-dim);
}

.menu-button,
#toc-close {
  display: none;
  border: 0;
  color: var(--text);
  background: transparent;
  font: inherit;
  cursor: pointer;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
  gap: clamp(48px, 7vw, 110px);
  min-height: 640px;
  padding: 104px max(28px, calc((100vw - 1180px) / 2)) 100px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero::after {
  position: absolute;
  right: -120px;
  bottom: -220px;
  width: 560px;
  height: 560px;
  border: 1px solid rgba(66, 245, 141, 0.12);
  border-radius: 50%;
  box-shadow:
    0 0 0 64px rgba(66, 245, 141, 0.018),
    0 0 0 128px rgba(66, 245, 141, 0.012);
  content: "";
}

.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.16;
  background-image:
    linear-gradient(rgba(66, 245, 141, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(66, 245, 141, 0.13) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 84%);
  pointer-events: none;
}

.hero-copy,
.hero-terminal {
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--green-soft);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  letter-spacing: 0.16em;
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 14px var(--green);
}

.hero h1 {
  margin: 26px 0 24px;
  color: var(--text-bright);
  font-size: clamp(48px, 6.2vw, 82px);
  font-weight: 760;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.hero h1 span {
  color: var(--green);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-weight: 680;
  text-shadow: 0 0 34px rgba(66, 245, 141, 0.18);
}

.hero-deck {
  max-width: 650px;
  margin: 0;
  color: #acb9b0;
  font-size: 18px;
  line-height: 1.8;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 32px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
}

.hero-meta span::before {
  margin-right: 8px;
  color: var(--green);
  content: "◆";
  font-size: 7px;
  vertical-align: 1px;
}

.start-link {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: 40px;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--green);
  color: var(--green);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  text-decoration: none;
}

.start-link span {
  transition: transform 160ms ease;
}

.start-link:hover span {
  transform: translateY(3px);
}

.hero-terminal {
  align-self: center;
  border: 1px solid var(--line-bright);
  background: rgba(11, 15, 13, 0.88);
  box-shadow: 28px 28px 0 rgba(66, 245, 141, 0.025), 0 24px 80px rgba(0, 0, 0, 0.38);
  transform: rotate(0.6deg);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 42px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}

.terminal-bar span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #355142;
}

.terminal-bar span:first-child {
  background: var(--green);
}

.terminal-bar small {
  margin-left: auto;
  color: #66756b;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 10px;
}

.hero-terminal pre {
  margin: 0;
  padding: 28px 26px;
  overflow: hidden;
  color: #aab7ae;
  background: transparent;
  font-size: clamp(11px, 1.15vw, 14px);
  line-height: 2;
}

.hero-terminal i {
  margin-right: 18px;
  color: #415348;
  font-style: normal;
}

.hero-terminal b {
  color: var(--green);
  font-weight: 500;
}

.page-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, var(--content-width));
  justify-content: center;
  gap: clamp(54px, 7vw, 112px);
  max-width: 1240px;
  margin: 0 auto;
  padding: 76px 32px 140px;
}

.toc-panel {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  align-self: start;
  max-height: calc(100vh - var(--header-height) - 48px);
  border-left: 1px solid var(--line);
}

.toc-heading,
.toc-footer {
  padding-left: 20px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.toc-heading {
  display: flex;
  justify-content: space-between;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.16em;
}

.toc-nav {
  max-height: calc(100vh - 190px);
  overflow: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line-bright) transparent;
}

.toc-nav a {
  position: relative;
  display: block;
  padding: 7px 10px 7px 20px;
  color: #7f8d83;
  font-size: 12px;
  line-height: 1.45;
  text-decoration: none;
  transition: color 120ms ease, background 120ms ease;
}

.toc-nav a[data-level="2"] {
  padding-left: 34px;
  font-size: 11px;
}

.toc-nav a::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -1px;
  width: 1px;
  background: transparent;
  content: "";
}

.toc-nav a:hover,
.toc-nav a.is-active {
  color: var(--text-bright);
  background: linear-gradient(90deg, var(--green-dim), transparent);
}

.toc-nav a.is-active::before {
  background: var(--green);
  box-shadow: 0 0 9px var(--green);
}

.toc-footer {
  display: flex;
  flex-direction: column;
  margin-top: 18px;
  color: #5d6a61;
  font-size: 10px;
  line-height: 1.6;
}

.toc-footer time {
  color: #8e9b92;
}

.toc-footer a {
  margin-bottom: 12px;
  color: var(--green-soft);
  text-decoration: none;
}

.prose {
  min-width: 0;
  color: #b6c2ba;
  font-size: 16px;
}

.doc-section {
  padding-top: 12px;
}

.doc-section + .doc-section {
  margin-top: 76px;
  padding-top: 76px;
  border-top: 1px solid var(--line);
}

.source-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  color: #68776d;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.07em;
  text-decoration: none;
}

.source-link::before {
  color: var(--green);
  content: "MD";
}

.source-link:hover {
  color: var(--green-soft);
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  color: var(--text-bright);
  letter-spacing: -0.025em;
  line-height: 1.34;
}

.prose h1 {
  margin: 0 0 28px;
  font-size: clamp(30px, 4vw, 43px);
}

.prose h1::before {
  display: block;
  margin-bottom: 13px;
  color: var(--green);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  content: "// SECTION";
}

.prose h2 {
  margin: 56px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 25px;
}

.prose h3 {
  margin: 36px 0 13px;
  font-size: 19px;
}

.prose h4 {
  margin: 28px 0 10px;
  font-size: 16px;
}

.prose :is(h1, h2, h3, h4) a.heading-anchor {
  margin-left: 8px;
  color: transparent;
  font-weight: 400;
  text-decoration: none;
}

.prose :is(h1, h2, h3, h4):hover a.heading-anchor {
  color: var(--line-bright);
}

.prose p {
  margin: 0 0 18px;
}

.prose strong {
  color: #e2ede6;
  font-weight: 650;
}

.prose a {
  color: var(--green-soft);
  text-decoration-color: rgba(128, 237, 169, 0.35);
  text-underline-offset: 3px;
}

.prose a:hover {
  text-decoration-color: var(--green);
}

.prose ul,
.prose ol {
  margin: 14px 0 24px;
  padding-left: 25px;
}

.prose li {
  margin: 7px 0;
  padding-left: 4px;
}

.prose li::marker {
  color: var(--green);
}

.prose blockquote {
  position: relative;
  margin: 28px 0;
  padding: 20px 24px 20px 28px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  color: #c9d5cd;
  background: linear-gradient(100deg, var(--green-dim), rgba(66, 245, 141, 0.015));
}

.prose blockquote::before {
  position: absolute;
  top: 10px;
  right: 16px;
  color: rgba(66, 245, 141, 0.15);
  font-family: Georgia, serif;
  font-size: 44px;
  line-height: 1;
  content: "“";
}

.prose blockquote p:last-child {
  margin-bottom: 0;
}

.prose table {
  display: block;
  width: 100%;
  margin: 26px 0 32px;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 14px;
}

.prose th,
.prose td {
  min-width: 130px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.prose th {
  color: var(--green-soft);
  background: var(--surface-3);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  font-weight: 560;
}

.prose tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.012);
}

.prose code {
  padding: 0.18em 0.42em;
  border: 1px solid rgba(66, 245, 141, 0.16);
  border-radius: 3px;
  color: #a6f4c2;
  background: rgba(66, 245, 141, 0.07);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.86em;
}

.prose pre {
  position: relative;
  margin: 26px 0 32px;
  padding: 21px 22px;
  overflow: auto;
  border: 1px solid var(--line);
  background: #090d0b;
  line-height: 1.65;
}

.prose pre::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(var(--green), transparent);
  content: "";
}

.prose pre code {
  padding: 0;
  border: 0;
  color: #c3d0c7;
  background: transparent;
  font-size: 13px;
}

.copy-code {
  position: absolute;
  top: 9px;
  right: 9px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  color: #6d7c72;
  background: #0e1410;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 9px;
  cursor: pointer;
}

.copy-code:hover {
  border-color: var(--line-bright);
  color: var(--green);
}

.mermaid-wrap {
  margin: 28px 0 34px;
  padding: 24px 18px;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: #0b0f0d;
}

.mermaid {
  display: flex;
  justify-content: center;
  min-width: 560px;
}

.prose hr {
  height: 1px;
  margin: 58px 0;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--line-bright), transparent);
}

.prose input[type="checkbox"] {
  width: 14px;
  height: 14px;
  margin-right: 8px;
  accent-color: var(--green);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 28px 56px;
  border-top: 1px solid var(--line);
  color: #68746c;
  font-size: 12px;
}

.site-footer p {
  margin: 0;
}

.site-footer div {
  display: flex;
  gap: 20px;
}

.site-footer a {
  color: #8d9a91;
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--green);
}

.toc-backdrop {
  display: none;
}

.home-preface {
  max-width: 1050px;
  margin: 0 auto;
  padding: 94px 32px 18px;
}

.home-preface-prose {
  max-width: 800px;
}

.home-preface-prose > blockquote:first-child {
  margin-top: 0;
}

.home-preface-prose h2:first-of-type {
  margin-top: 48px;
}

.chapter-index {
  max-width: 1180px;
  margin: 0 auto;
  padding: 86px 28px 120px;
}

.section-intro {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(320px, 1.2fr);
  gap: clamp(42px, 8vw, 120px);
  align-items: end;
  margin-bottom: 48px;
}

.section-kicker {
  color: var(--green);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 11px;
  letter-spacing: 0.15em;
}

.section-intro h2,
.featured-argument h2 {
  margin: 10px 0 0;
  color: var(--text-bright);
  font-size: clamp(32px, 4vw, 48px);
  letter-spacing: -0.045em;
  line-height: 1.15;
}

.section-intro p {
  max-width: 620px;
  margin: 0;
  color: #9daaa1;
  font-size: 16px;
  line-height: 1.9;
}

.chapter-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.chapter-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 278px;
  padding: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  color: inherit;
  background:
    linear-gradient(135deg, rgba(66, 245, 141, 0.045), transparent 46%),
    var(--surface);
  text-decoration: none;
  transition: border-color 170ms ease, transform 170ms ease, background 170ms ease;
}

.chapter-card::after {
  position: absolute;
  right: -50px;
  bottom: -72px;
  width: 160px;
  height: 160px;
  border: 1px solid rgba(66, 245, 141, 0.08);
  border-radius: 50%;
  content: "";
}

.chapter-card:hover {
  border-color: var(--line-bright);
  background:
    linear-gradient(135deg, rgba(66, 245, 141, 0.085), transparent 52%),
    var(--surface-2);
  transform: translateY(-3px);
}

.chapter-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.chapter-card-top span {
  color: var(--green);
  font-size: 17px;
}

.chapter-card-top small {
  font-size: 10px;
  letter-spacing: 0.12em;
}

.chapter-card h3 {
  max-width: 540px;
  margin: 30px 0 14px;
  color: var(--text-bright);
  font-size: 24px;
  letter-spacing: -0.03em;
  line-height: 1.35;
}

.chapter-card p {
  max-width: 560px;
  margin: 0 0 28px;
  color: #849188;
  font-size: 14px;
  line-height: 1.75;
}

.chapter-card-action {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: auto;
  color: var(--green-soft);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 11px;
}

.chapter-card-action span {
  transition: transform 160ms ease;
}

.chapter-card:hover .chapter-card-action span {
  transform: translateX(4px);
}

.featured-argument {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 60px;
  align-items: end;
  max-width: 1180px;
  margin: 0 auto 120px;
  padding: 48px;
  border: 1px solid var(--line-bright);
  background:
    linear-gradient(105deg, rgba(66, 245, 141, 0.1), transparent 62%),
    var(--surface);
}

.featured-argument h2 {
  max-width: 760px;
  font-size: clamp(28px, 3.6vw, 43px);
}

.featured-argument p {
  max-width: 760px;
  margin: 20px 0 0;
  color: #9eaba2;
  line-height: 1.85;
}

.featured-argument > a {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 13px 17px;
  border: 1px solid var(--green);
  color: var(--green);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  text-decoration: none;
  white-space: nowrap;
}

.chapter-hero {
  position: relative;
  max-width: 1050px;
  margin: 0 auto;
  padding: 78px 32px 66px;
  border-bottom: 1px solid var(--line);
}

.chapter-back {
  display: inline-flex;
  margin-bottom: 38px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 11px;
  text-decoration: none;
}

.chapter-back:hover {
  color: var(--green);
}

.chapter-number {
  position: absolute;
  top: 54px;
  right: 30px;
  color: rgba(66, 245, 141, 0.09);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: clamp(80px, 15vw, 170px);
  font-weight: 700;
  line-height: 1;
  pointer-events: none;
}

.chapter-hero h1 {
  position: relative;
  max-width: 820px;
  margin: 0;
  color: var(--text-bright);
  font-size: clamp(38px, 6vw, 64px);
  letter-spacing: -0.055em;
  line-height: 1.12;
}

.chapter-hero > p {
  position: relative;
  max-width: 720px;
  margin: 24px 0 0;
  color: #9ba89f;
  font-size: 17px;
  line-height: 1.8;
}

.chapter-meta {
  display: flex;
  gap: 20px;
  margin-top: 28px;
  color: #627067;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 10px;
}

.chapter-meta span::before {
  margin-right: 7px;
  color: var(--green);
  content: "◆";
  font-size: 6px;
}

.chapter-shell {
  padding-top: 66px;
}

.chapter-pager {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 78px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.pager-link {
  display: flex;
  flex-direction: column;
  min-height: 104px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: var(--surface);
  text-decoration: none;
  transition: border-color 160ms ease, background 160ms ease;
}

.pager-link:hover {
  border-color: var(--line-bright);
  background: var(--green-dim);
}

.pager-link small {
  margin-bottom: 8px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 10px;
}

.pager-link span {
  color: var(--text-bright);
  font-size: 14px;
  line-height: 1.5;
}

.pager-next {
  text-align: right;
}

.pager-home {
  justify-content: center;
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 80px;
  }

  .hero-terminal {
    width: min(100%, 620px);
  }

  .page-shell {
    grid-template-columns: minmax(0, var(--content-width));
    padding-top: 62px;
  }

  .toc-panel {
    position: fixed;
    z-index: 80;
    top: 0;
    left: 0;
    width: min(86vw, 330px);
    height: 100vh;
    max-height: none;
    padding: 28px 20px 32px 0;
    border-left: 0;
    border-right: 1px solid var(--line-bright);
    background: #0b0f0d;
    transform: translateX(-102%);
    transition: transform 180ms ease;
  }

  .toc-open .toc-panel {
    transform: translateX(0);
  }

  .toc-nav {
    max-height: calc(100vh - 130px);
  }

  .menu-button,
  #toc-close {
    display: block;
  }

  #toc-close {
    font-size: 22px;
  }

  .toc-backdrop {
    position: fixed;
    z-index: 70;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
  }

  .toc-open .toc-backdrop {
    display: block;
  }

  .toc-open {
    overflow: hidden;
  }

  .featured-argument {
    grid-template-columns: 1fr;
    align-items: start;
    margin-right: 28px;
    margin-left: 28px;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 58px;
  }

  .site-header {
    padding: 0 18px;
  }

  .brand span:last-child,
  .plain-link,
  .github-link svg {
    display: none;
  }

  .header-actions {
    gap: 13px;
  }

  .github-link {
    padding: 6px 10px;
  }

  .hero {
    gap: 54px;
    padding: 64px 20px 68px;
  }

  .hero h1 {
    font-size: clamp(43px, 13.5vw, 63px);
  }

  .hero-deck {
    font-size: 16px;
  }

  .hero-terminal {
    transform: none;
  }

  .hero-terminal pre {
    padding: 20px 15px;
    font-size: 10px;
  }

  .hero-terminal i {
    margin-right: 8px;
  }

  .page-shell {
    padding: 48px 20px 96px;
  }

  .chapter-index {
    padding: 78px 20px 90px;
  }

  .home-preface {
    padding: 68px 20px 4px;
  }

  .section-intro,
  .chapter-cards {
    grid-template-columns: 1fr;
  }

  .section-intro {
    gap: 24px;
    margin-bottom: 34px;
  }

  .chapter-card {
    min-height: 250px;
    padding: 24px;
  }

  .featured-argument {
    gap: 34px;
    margin: 0 20px 90px;
    padding: 30px 24px;
  }

  .featured-argument > a {
    justify-content: center;
    width: 100%;
  }

  .chapter-hero {
    padding: 54px 20px 48px;
  }

  .chapter-back {
    margin-bottom: 30px;
  }

  .chapter-number {
    top: 74px;
    right: 18px;
    font-size: 90px;
  }

  .chapter-hero h1 {
    font-size: 38px;
  }

  .chapter-hero > p {
    font-size: 15px;
  }

  .chapter-pager {
    grid-template-columns: 1fr;
  }

  .doc-section + .doc-section {
    margin-top: 54px;
    padding-top: 54px;
  }

  .prose {
    font-size: 15px;
  }

  .prose h1 {
    font-size: 30px;
  }

  .prose h2 {
    margin-top: 44px;
    font-size: 22px;
  }

  .prose h3 {
    font-size: 18px;
  }

  .prose blockquote {
    margin-right: -6px;
    margin-left: -6px;
    padding: 18px 18px 18px 20px;
  }

  .prose pre {
    margin-right: -8px;
    margin-left: -8px;
    padding: 18px 16px;
  }

  .site-footer {
    flex-direction: column;
    padding: 32px 20px 46px;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}