:root {
  --color-black: #050505;
  --color-ink: #111111;
  --color-gray-700: #3d3d3d;
  --color-gray-500: #696969;
  --color-gray-300: #a3a3a3;
  --color-line: #d7d7d2;
  --color-soft: #f3f3ef;
  --color-paper: #fbfbf8;
  --color-white: #ffffff;
  --color-red: #e00012;
  --container: 1240px;
  --reading: 760px;
  --axis: 18px;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --display-home: clamp(3.5rem, 8vw, 7rem);
  --display-page: clamp(2.75rem, 6vw, 5.125rem);
  --heading-2: clamp(2rem, 4.1vw, 3.45rem);
  --heading-3: clamp(1.4rem, 2.2vw, 2rem);
  --body-lg: clamp(1.125rem, 1.6vw, 1.35rem);
  --body: clamp(1rem, 1.2vw, 1.125rem);
  --space-section: clamp(4.5rem, 8vw, 7rem);
  --space-block: clamp(2rem, 4vw, 3.5rem);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
  background: var(--color-paper);
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-sans);
  line-height: 1.62;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
  touch-action: none;
}

body::before {
  position: fixed;
  z-index: 120;
  top: 0;
  bottom: 0;
  left: var(--axis);
  width: 2px;
  background: var(--color-red);
  content: "";
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

button,
input,
textarea {
  font: inherit;
}

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

p,
li {
  margin: 0;
  color: var(--color-ink);
  font-size: var(--body);
  line-height: 1.62;
  text-wrap: pretty;
  hyphens: none;
  overflow-wrap: normal;
  word-break: normal;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--color-ink);
  font-weight: 860;
  letter-spacing: -0.045em;
  line-height: 0.96;
  text-wrap: balance;
  hyphens: none;
  overflow-wrap: normal;
  word-break: normal;
}

.hero-grid > *,
.section > .wrap > *,
.footer-grid > *,
.hero-copy,
.black-panel,
.section-head,
.section-content,
.footer-col,
.card,
.case-card,
.definition-card,
.reading,
.grid,
.case-grid,
.definition-grid,
.contact-box,
.cta .wrap > *,
.panel-row > * {
  min-width: 0;
}

strong {
  font-weight: 800;
}

:focus-visible {
  outline: 3px solid var(--color-red);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: 8px;
  left: 48px;
  padding: 12px 16px;
  transform: translateY(-160%);
  background: var(--color-black);
  color: var(--color-white);
}

.skip-link:focus {
  transform: none;
}

.axis-caption {
  display: none;
  position: fixed;
  z-index: 121;
  bottom: 22px;
  left: 20px;
  color: var(--color-red);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  pointer-events: none;
  text-transform: uppercase;
  transform: rotate(180deg);
  writing-mode: vertical-rl;
}

.wrap {
  width: min(calc(100% - 24px), var(--container));
  margin: 0 auto;
  padding-left: 22px;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid var(--color-line);
  background: rgb(251 251 248 / 94%);
  backdrop-filter: blur(16px);
}

body.menu-open .site-header {
  backdrop-filter: none;
}

.header-inner {
  display: flex;
  width: min(calc(100% - 24px), var(--container));
  min-height: 68px;
  margin: 0 auto;
  padding-left: 22px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-ink);
  font-size: 24px;
  font-weight: 860;
  letter-spacing: -0.05em;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  width: 16px;
  height: 16px;
  background: var(--color-red);
}

.menu-button {
  display: inline-flex;
  min-width: 92px;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--color-black);
  align-items: center;
  justify-content: center;
  background: var(--color-paper);
  color: var(--color-ink);
  cursor: pointer;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav {
  position: fixed;
  z-index: 1000;
  top: var(--header-height, 68px);
  right: 0;
  left: 0;
  display: none;
  height: calc(100dvh - var(--header-height, 68px));
  max-height: calc(100dvh - var(--header-height, 68px));
  padding: 24px 28px calc(40px + env(safe-area-inset-bottom)) 40px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--color-paper);
  -webkit-overflow-scrolling: touch;
}

.nav[data-open] {
  display: grid;
  align-content: start;
}

.nav-group {
  border-bottom: 1px solid var(--color-line);
}

.nav-link,
.nav-summary {
  display: flex;
  min-height: 56px;
  align-items: center;
  color: var(--color-ink);
  font-size: 18px;
  font-weight: 760;
  text-decoration: none;
}

.nav-summary {
  cursor: pointer;
  list-style: none;
}

.nav-summary::-webkit-details-marker {
  display: none;
}

.nav-sub {
  display: none;
  padding: 0 0 14px;
  gap: 8px;
}

.nav-group[open] > .nav-sub {
  display: grid;
}

.nav-summary::after {
  margin-left: 0.55rem;
  color: var(--color-red);
  content: "+";
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.nav-group[open] > .nav-summary::after {
  content: "−";
}

.nav-sub a {
  color: var(--color-gray-700);
  font-size: 15px;
  text-decoration: none;
}

.nav a[aria-current="page"] {
  color: var(--color-red);
}

.nav-cta {
  display: inline-flex;
  min-height: 54px;
  margin-top: 24px;
  padding: 0 18px;
  border: 1px solid var(--color-black);
  align-items: center;
  justify-content: center;
  background: var(--color-black);
  color: var(--color-white);
  font-weight: 800;
  text-decoration: none;
}

main {
  position: relative;
  z-index: 1;
}

.breadcrumbs {
  display: flex;
  padding-top: 20px;
  align-items: center;
  gap: 8px;
  color: var(--color-gray-500);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.breadcrumbs a {
  color: var(--color-gray-500);
  text-decoration: none;
}

.hero {
  padding: 54px 0 36px;
  border-bottom: 1px solid var(--color-line);
}

.hero-grid {
  display: grid;
  gap: 34px;
}

.eyebrow,
.kicker,
.tag {
  color: var(--color-red);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  line-height: 1.3;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 24px;
}

  h1 {
  max-width: 940px;
  margin-bottom: 28px;
  font-size: var(--display-page);
}

body:not(.home) h1 {
  max-width: 820px;
  font-size: clamp(2.2rem, 4.35vw, 4rem);
}

.home h1 {
  font-size: var(--display-home);
}

.lead {
  max-width: 820px;
  margin-bottom: 24px;
  color: var(--color-ink);
  font-size: var(--body-lg);
  letter-spacing: -0.025em;
  line-height: 1.22;
}

.sublead,
.microcopy {
  max-width: 720px;
  color: var(--color-gray-700);
  font-size: 16px;
  line-height: 1.6;
}

.microcopy {
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.actions {
  display: flex;
  max-width: 680px;
  margin-top: 28px;
  flex-direction: column;
  gap: 12px;
}

.button {
  display: inline-flex;
  min-height: 54px;
  padding: 13px 18px;
  border: 1px solid var(--color-black);
  align-items: center;
  justify-content: center;
  background: var(--color-black);
  color: var(--color-white);
  cursor: pointer;
  font-size: 14px;
  font-weight: 780;
  text-align: center;
  text-decoration: none;
}

.button.secondary {
  background: var(--color-white);
  color: var(--color-black);
}

.button:hover,
.button:focus-visible,
.nav-cta:hover,
.nav-cta:focus-visible {
  border-color: var(--color-red);
  background: var(--color-red);
  color: var(--color-white);
}

.black-panel {
  position: relative;
  display: flex;
  min-height: 420px;
  padding: 28px;
  overflow: hidden;
  flex-direction: column;
  justify-content: space-between;
  background: var(--color-black);
  color: var(--color-white);
}

.black-panel::after {
  position: absolute;
  top: 0;
  right: 0;
  width: 8px;
  height: 100%;
  background: var(--color-red);
  content: "";
}

.black-panel .kicker {
  color: #bdbdbd;
}

.black-panel h2 {
  margin-top: 34px;
  color: var(--color-white);
  font-size: clamp(2.05rem, 4.2vw, 3.35rem);
  letter-spacing: -0.045em;
  line-height: 1;
}

.black-panel p,
.black-panel li {
  color: #e1e1e1;
}

.panel-rows {
  display: grid;
  margin-top: 34px;
  border-top: 1px solid #3b3b3b;
}

.panel-row {
  display: flex;
  padding: 14px 0;
  border-bottom: 1px solid #3b3b3b;
  justify-content: space-between;
  gap: 18px;
}

.panel-row span {
  color: #aaa;
}

.panel-row b {
  color: var(--color-white);
  letter-spacing: -0.03em;
}

.format-strip {
  display: grid;
  border-top: 1px solid var(--color-line);
}

.format-item {
  min-height: 112px;
  padding: 22px 0;
  border-bottom: 1px solid var(--color-line);
}

.format-item strong {
  display: block;
  margin-bottom: 10px;
  font-size: clamp(1.8rem, 4vw, 3.4rem);
  letter-spacing: -0.055em;
  line-height: 0.94;
}

.section {
  padding: var(--space-section) 0;
  border-bottom: 1px solid var(--color-line);
}

.section > .wrap {
  display: grid;
  gap: 34px;
}

.section-head {
  align-self: start;
}

.section h2,
.cta h2 {
  max-width: 820px;
  font-size: var(--heading-2);
}

.section-intro {
  max-width: 680px;
  margin-top: 22px;
  color: var(--color-gray-700);
  font-size: var(--body-lg);
  letter-spacing: -0.015em;
  line-height: 1.4;
}

.reading {
  max-width: var(--reading);
}

.article-flow {
  padding: clamp(2.75rem, 5vw, 4.5rem) 0;
  border-bottom: 1px solid var(--color-line);
}

.article-layout {
  min-width: 0;
}

.article-main {
  min-width: 0;
  max-width: 820px;
}

.article-flow .section-head {
  position: static;
  top: auto;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.article-flow .section-head h2,
.article-flow .section-head .kicker,
.article-flow h3 {
  position: static;
  top: auto;
  scroll-margin-top: 112px;
}

.article-flow .section-head h2 {
  max-width: 780px;
  margin-top: 8px;
  font-size: clamp(1.8rem, 3vw, 2.65rem);
  line-height: 1.06;
}

.article-flow .reading {
  max-width: 780px;
}

.article-flow .reading h3 {
  max-width: 720px;
  margin: clamp(2.25rem, 4vw, 3.25rem) 0 0.85rem;
  font-size: clamp(1.35rem, 2vw, 1.7rem);
  letter-spacing: -0.035em;
  line-height: 1.16;
}

.article-flow .reading > :first-child {
  margin-top: 0;
}

.article-flow .reading h3 + p {
  margin-top: 0;
}

.article-flow .reading p + ul,
.article-flow .reading p + ol,
.article-flow .reading ul + ul,
.article-flow .reading ol + ol {
  margin-top: 18px;
}

.article-side-rail {
  display: none;
}

.article-side-card {
  padding: 28px;
  border: 1px solid var(--color-black);
  background: var(--color-black);
  color: var(--color-white);
}

.article-side-card h2,
.article-side-card p {
  color: var(--color-white);
}

.article-side-card h2 {
  margin: 14px 0 18px;
  font-size: clamp(1.65rem, 2.2vw, 2.1rem);
  line-height: 1.06;
}

.article-side-card > p:not(.kicker) {
  color: #d7d7d2;
  font-size: 16px;
  line-height: 1.55;
}

.article-side-card .button {
  width: 100%;
  margin-top: 24px;
  border-color: var(--color-white);
  background: var(--color-white);
  color: var(--color-black);
}

.article-side-link {
  display: inline-block;
  margin-top: 18px;
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
}

.article-byline {
  display: flex;
  flex-wrap: wrap;
  padding-top: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--color-line);
  gap: 14px 32px;
}

.article-toc {
  margin: clamp(2rem, 4vw, 3rem) 0;
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid var(--color-line);
  background: var(--color-white);
}

.article-toc__title {
  margin-bottom: 18px;
  font-size: clamp(1.3rem, 2vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.article-toc ol {
  display: grid;
  margin: 0;
  padding-left: 1.5rem;
  gap: 10px 32px;
}

.article-toc a {
  color: var(--color-black);
  line-height: 1.42;
  text-underline-offset: 0.16em;
}

.article-related {
  padding: clamp(2.75rem, 5vw, 4.5rem) 0;
}

.article-related__head {
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.article-related__head h2 {
  margin-top: 8px;
  font-size: clamp(1.8rem, 3vw, 2.65rem);
  line-height: 1.06;
  scroll-margin-top: 112px;
}

.related-article-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  padding: 1px;
  background: var(--color-line);
}

.related-article-card {
  min-width: 0;
  padding: clamp(1.35rem, 2.5vw, 1.8rem);
  background: var(--color-white);
}

.related-article-card .eyebrow {
  margin-bottom: 16px;
}

.related-article-card h3 {
  margin: 0;
  font-size: clamp(1.25rem, 1.8vw, 1.55rem);
  line-height: 1.15;
}

.related-article-card > p:not(.eyebrow, .article-card-action) {
  margin-top: 14px;
  color: var(--color-gray-700);
  font-size: 15px;
  line-height: 1.5;
}

.article-card-grid {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 1px;
  padding: 1px;
  background: var(--color-line);
}

.article-card-grid .article-card {
  min-height: 250px;
  border: 0;
  background: var(--color-white);
}

.article-card .eyebrow {
  margin-bottom: 22px;
}

.article-card-title a {
  color: inherit;
  text-decoration: none;
}

.article-card-title a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}

.article-card-action {
  margin-top: 22px;
}

.article-byline p {
  display: grid;
  margin: 0;
  gap: 3px;
}

.article-byline span {
  color: var(--color-gray-700);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.article-table-wrap {
  overflow-x: auto;
}

.article-table {
  min-width: 940px;
}

.knowledge-links {
  display: grid;
  border: 1px solid var(--color-line);
  background: var(--color-white);
}

.knowledge-link {
  display: grid;
  min-width: 0;
  padding: 24px;
  border-bottom: 1px solid var(--color-line);
  gap: 12px;
  text-decoration: none;
}

.knowledge-link:last-child {
  border-bottom: 0;
}

.knowledge-link span {
  color: var(--color-red);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.knowledge-link strong {
  max-width: 620px;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  letter-spacing: -0.035em;
  line-height: 1.16;
}

.grid,
.case-grid,
.definition-grid,
.contact-methods {
  display: grid;
  border: 1px solid var(--color-line);
  background: var(--color-white);
}

.card,
.case-card,
.definition-card,
.contact-card {
  min-width: 0;
  min-height: 220px;
  padding: 26px;
  border-bottom: 1px solid var(--color-line);
}

.card:last-child,
.case-card:last-child,
.definition-card:last-child,
.contact-card:last-child {
  border-bottom: 0;
}

.tag {
  display: inline-flex;
  margin-bottom: 34px;
}

.card h3,
.case-card h3,
.definition-card h3,
.contact-card h3 {
  margin-bottom: 16px;
  font-size: clamp(1.18rem, 1.55vw, 1.58rem);
  line-height: 1.12;
}

.numbered-card-grid .card {
  min-height: 0;
  padding: 18px 20px;
}

.numbered-card-grid .tag {
  margin-bottom: 8px;
}

.numbered-card-grid .card p,
.numbered-card-grid .card li {
  font-size: clamp(1.0625rem, 1.05vw, 1.1875rem);
  font-weight: 480;
  letter-spacing: -0.01em;
  line-height: 1.55;
}

.answer-system-grid {
  background: transparent;
}

.legal-page {
  padding: clamp(3.25rem, 7vw, 6rem) 0;
  border-bottom: 1px solid var(--color-line);
}

.legal-document {
  max-width: 78ch;
}

.legal-document h1 {
  margin: 0 0 34px;
  font-size: clamp(2.15rem, 5vw, 4rem);
  line-height: 1.04;
}

.legal-document h2 {
  margin: 46px 0 16px;
  font-size: clamp(1.45rem, 2.4vw, 2rem);
  line-height: 1.12;
}

.legal-document h3 {
  margin: 30px 0 12px;
  font-size: clamp(1.18rem, 1.8vw, 1.45rem);
  line-height: 1.18;
}

.legal-document p,
.legal-document li {
  font-size: clamp(1rem, 1.1vw, 1.08rem);
  line-height: 1.7;
}

.legal-document p + p,
.legal-document ul + p,
.legal-document p + ul {
  margin-top: 14px;
}

.legal-document ul {
  display: grid;
  margin: 0 0 18px;
  padding-left: 1.2em;
  gap: 8px;
}

.footer-cookie {
  display: inline;
  padding: 0;
  border: 0;
  background: transparent;
  color: #aaa;
  cursor: pointer;
  font-size: 14px;
  text-align: left;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.footer-cookie:hover,
.footer-cookie:focus-visible {
  color: var(--color-white);
}

.analytics-consent {
  position: fixed;
  z-index: 1200;
  right: 12px;
  bottom: calc(12px + env(safe-area-inset-bottom));
  left: 12px;
  display: grid;
  max-width: 680px;
  padding: 18px;
  border: 1px solid var(--color-line);
  gap: 14px;
  background: var(--color-paper);
}

.analytics-consent-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.analytics-consent button,
.analytics-consent a {
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--color-black);
  background: var(--color-white);
  color: var(--color-black);
  font-size: 14px;
  font-weight: 760;
  text-decoration: none;
}

.case-detail {
  display: grid;
  border: 1px solid var(--color-line);
  background: var(--color-white);
}

.case-row {
  display: grid;
  padding: 18px 20px;
  border-bottom: 1px solid var(--color-line);
  gap: 8px;
}

.case-row:last-child {
  border-bottom: 0;
}

.case-row strong {
  color: var(--color-red);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 760;
  letter-spacing: 0.07em;
  line-height: 1.35;
  text-transform: uppercase;
}

.case-row div {
  max-width: 760px;
  font-size: var(--body);
  line-height: 1.62;
}

.contact-card h3 a {
  color: var(--color-ink);
}

.card ul,
.case-card ul,
.reading ul,
.reading ol {
  display: grid;
  margin: 0;
  padding-left: 1.15em;
  gap: 10px;
}

.card li::marker,
.case-card li::marker,
.reading li::marker {
  color: var(--color-red);
}

.table {
  width: 100%;
  border: 1px solid var(--color-line);
  border-collapse: collapse;
  background: var(--color-white);
}

.table th,
.table td {
  padding: 18px;
  border: 1px solid var(--color-line);
  text-align: left;
  vertical-align: top;
}

.table th {
  background: var(--color-soft);
  color: var(--color-gray-700);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.faq-list {
  min-width: 0;
}

.faq-list details {
  border-top: 1px solid var(--color-line);
}

.faq-list details:last-child {
  border-bottom: 1px solid var(--color-line);
}

.faq-list summary {
  padding: 24px 0;
  cursor: pointer;
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: 780;
  letter-spacing: -0.035em;
  line-height: 1.14;
  list-style: none;
}

.faq-list summary::-webkit-details-marker,
.nav-summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  float: right;
  margin-left: 16px;
  color: var(--color-red);
  content: "+";
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  max-width: 820px;
  margin-bottom: 28px;
  color: var(--color-gray-700);
}

.reading p + p,
.reading ul + p,
.reading ol + p,
.reading p + ul,
.reading p + ol,
.contact-box p + p {
  margin-top: 18px;
}

.reading li + li {
  margin-top: 6px;
}

.contact-box {
  padding: 26px;
  border: 1px solid var(--color-line);
  background: var(--color-white);
}

.cta {
  padding: var(--space-section) 0;
  background: var(--color-black);
  color: var(--color-white);
}

.cta .wrap {
  display: grid;
  gap: 26px;
}

.cta h2,
.cta p {
  color: var(--color-white);
}

.cta p {
  max-width: 720px;
  color: #e1e1e1;
  font-size: var(--body-lg);
}

.cta .button {
  border-color: var(--color-white);
  background: var(--color-white);
  color: var(--color-black);
}

.cta .button.secondary {
  background: transparent;
  color: var(--color-white);
}

.site-footer {
  padding: 40px 0 54px;
  border-top: 1px solid #343434;
  background: var(--color-black);
  color: #aaa;
}

.footer-grid {
  display: grid;
  gap: 30px;
}

.site-footer .brand {
  color: var(--color-white);
}

.site-footer p {
  max-width: 440px;
  margin-top: 14px;
  color: #aaa;
  font-size: 14px;
}

.footer-col {
  display: grid;
  align-content: start;
  gap: 10px;
}

.footer-col strong {
  color: var(--color-white);
  font-size: 13px;
  text-transform: uppercase;
}

.footer-col a {
  color: #aaa;
  font-size: 14px;
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--color-white);
}

@media (min-width: 620px) {
  .actions {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .button {
    justify-content: flex-start;
  }

  .format-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .format-item {
    padding-right: 22px;
    border-right: 1px solid var(--color-line);
    border-bottom: 0;
  }

  .format-item + .format-item {
    padding-left: 22px;
  }

  .format-item:last-child {
    border-right: 0;
  }
}

@media (min-width: 768px) {
  :root {
    --axis: 34px;
  }

  .wrap,
  .header-inner {
    width: min(calc(100% - 34px), var(--container));
    padding-left: 30px;
  }

  .grid,
  .case-grid,
  .definition-grid,
  .contact-methods {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .numbered-card-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .numbered-card-grid > .card {
    grid-column: span 2;
  }

  .grid.grid-odd:not(.answer-system-grid) > .card:last-child {
    grid-column: span 4;
  }

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

  .card,
  .case-card,
  .definition-card,
  .contact-card {
    border-right: 1px solid var(--color-line);
  }

  .card:nth-child(2n),
  .case-card:nth-child(2n),
  .definition-card:nth-child(2n),
  .contact-card:nth-child(2n) {
    border-right: 0;
  }

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

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

  .knowledge-link {
    border-right: 1px solid var(--color-line);
    border-bottom: 0;
  }

  .knowledge-link:last-child {
    border-right: 0;
  }
}

@media (min-width: 1040px) {
  :root {
    --axis: 72px;
  }

  body.menu-open {
    overflow: auto;
  }

  .axis-caption {
    display: block;
  }

  .wrap,
  .header-inner {
    width: min(calc(100% - 48px), var(--container));
    padding-left: 42px;
  }

  .header-inner {
    min-height: 72px;
  }

  .menu-button {
    display: none;
  }

  .nav,
  .nav[data-open] {
    position: static;
    display: flex;
    height: auto;
    max-height: none;
    padding: 0;
    overflow: visible;
    align-items: center;
    gap: 20px;
    background: transparent;
  }

  .nav-group {
    position: relative;
    border-bottom: 0;
  }

  .nav-link,
  .nav-summary {
    min-height: 44px;
    border-bottom: 1px solid transparent;
    font-size: 13px;
    font-weight: 560;
  }

  .nav-link:hover,
  .nav-summary:hover {
    border-color: var(--color-red);
  }

  .nav-sub {
    position: absolute;
    top: 100%;
    left: 0;
    display: none;
    min-width: 260px;
    padding: 16px;
    border: 1px solid var(--color-line);
    background: var(--color-paper);
  }

  .nav-group[open] > .nav-sub {
    display: grid;
  }

  .nav-cta {
    min-height: 44px;
    margin: 0;
    padding: 0 14px;
  }

  .hero {
    padding: 86px 0 54px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(300px, 0.82fr);
    align-items: start;
    gap: 48px;
  }

  .black-panel {
    min-height: 560px;
    padding: 34px;
  }

  .section > .wrap {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 48px;
  }

  .section-head {
    position: sticky;
    top: 104px;
  }

  .section-head h2 {
    font-size: clamp(1.7rem, 2.15vw, 2.2rem);
    line-height: 1.08;
    letter-spacing: -0.04em;
  }

  .grid,
  .case-grid,
  .definition-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .numbered-card-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .numbered-card-grid > .card {
    grid-column: span 2;
  }

  .grid.grid-odd:not(.answer-system-grid) > .card:last-child {
    grid-column: span 2;
  }

  .grid.grid-remainder-1:not(.answer-system-grid) > .card:last-child {
    grid-column: span 6;
  }

  .grid.grid-remainder-2:not(.answer-system-grid) > .card:nth-last-child(2),
  .grid.grid-remainder-2:not(.answer-system-grid) > .card:last-child {
    grid-column: span 3;
  }

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

  .case-row {
    grid-template-columns: minmax(0, 190px) minmax(0, 1fr);
    gap: 30px;
    padding: 20px 24px;
  }

  .card:nth-child(2n),
  .case-card:nth-child(2n),
  .definition-card:nth-child(2n) {
    border-right: 1px solid var(--color-line);
  }

  .card:nth-child(3n),
  .case-card:nth-child(3n),
  .definition-card:nth-child(3n) {
    border-right: 0;
  }

  .answer-system-grid .card:nth-child(2n) {
    border-right: 0;
  }

  .answer-system-grid .card:nth-child(3n) {
    border-right: 1px solid var(--color-line);
  }

  .definition-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .definition-card:nth-child(3n) {
    border-right: 1px solid var(--color-line);
  }

  .definition-card:nth-child(4n) {
    border-right: 0;
  }

  .cta .wrap {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
    gap: 54px;
  }

  .cta .actions {
    grid-column: 2;
  }

  .footer-grid {
    grid-template-columns: minmax(240px, 1fr) repeat(4, minmax(0, max-content));
  }
}

@media (min-width: 1180px) {
  .article-layout {
    display: grid;
    grid-template-columns: minmax(0, 820px) minmax(280px, 300px);
    justify-content: space-between;
    gap: clamp(40px, 4vw, 56px);
  }

  .article-side-rail {
    position: sticky;
    top: 104px;
    display: block;
    align-self: start;
    padding-top: 34px;
  }

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

@media (max-width: 760px) {
  :root {
    --space-section: 3.5rem;
  }

  h1 {
    font-size: clamp(2.55rem, 11vw, 3.65rem);
    letter-spacing: -0.04em;
  }

  body:not(.home) h1 {
    font-size: clamp(1.9rem, 8.2vw, 2.65rem);
    line-height: 1.06;
  }

  .article-toc {
    padding: 22px 20px;
  }

  .article-toc ol,
  .related-article-grid {
    grid-template-columns: 1fr;
  }

  .related-article-card {
    padding: 22px 20px;
  }

  h2 {
    font-size: clamp(1.7rem, 7.4vw, 2.35rem);
    line-height: 1.08;
  }

  .black-panel h2 {
    font-size: clamp(1.72rem, 7.4vw, 2.22rem);
    line-height: 1.08;
  }

  .section-head {
    position: static;
  }

  .article-flow {
    padding: 2.5rem 0;
  }

  .article-flow .section-head {
    margin-bottom: 1.4rem;
  }

  .article-flow .section-head h2 {
    margin-top: 7px;
    font-size: clamp(1.65rem, 7vw, 2.15rem);
    line-height: 1.1;
  }

  .article-flow .reading h3 {
    margin-top: 2.15rem;
    margin-bottom: 0.75rem;
    font-size: clamp(1.28rem, 5.6vw, 1.55rem);
    line-height: 1.2;
  }

  .article-card-grid .article-card {
    min-height: 0;
  }

  .table,
  .table thead,
  .table tbody,
  .table tr,
  .table th,
  .table td {
    display: block;
    width: 100%;
  }

  .table thead {
    display: none;
  }

  .article-table {
    min-width: 0;
  }

  .article-table tr {
    border-bottom: 1px solid var(--color-line);
  }

  .article-table td {
    padding: 14px 16px;
    border-width: 0 1px 1px;
  }

  .article-table td::before {
    display: block;
    margin-bottom: 5px;
    color: var(--color-gray-700);
    content: attr(data-label);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }
}

@media (max-width: 900px) {
  .article-table,
  .article-table thead,
  .article-table tbody,
  .article-table tr,
  .article-table th,
  .article-table td {
    display: block;
    width: 100%;
  }

  .article-table {
    min-width: 0;
  }

  .article-table thead {
    display: none;
  }

  .article-table tr {
    border-bottom: 1px solid var(--color-line);
  }

  .article-table td {
    padding: 14px 16px;
    border-width: 0 1px 1px;
  }

  .article-table td::before {
    display: block;
    margin-bottom: 5px;
    color: var(--color-gray-700);
    content: attr(data-label);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }
}

@media (max-width: 480px) {
  .panel-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4px;
    justify-content: start;
  }

  .panel-row b {
    text-align: left;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}