:root {
  color-scheme: light;

  --cm-brand-cyan: #00a1e9;
  --cm-brand-yellow: #fabf00;
  --cm-brand-ink: #231914;
  --cm-primary-50: #eaf8fe;
  --cm-primary-700: #006a9c;
  --cm-primary-800: #00506f;
  --cm-neutral-0: #ffffff;
  --cm-neutral-50: #f8fafb;
  --cm-neutral-100: #eef3f6;
  --cm-neutral-200: #dde6eb;
  --cm-neutral-300: #c6d2da;
  --cm-neutral-500: #6f828e;
  --cm-neutral-600: #536670;
  --cm-neutral-700: #3d4c54;
  --cm-neutral-900: #172126;

  --cm-font-ui: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  --cm-content: 1120px;
  --cm-sidebar: 232px;
  --cm-header: 72px;
  --cm-rule: 2px solid var(--cm-brand-cyan);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  background: var(--cm-neutral-50);
  color: var(--cm-neutral-900);
  font-family: var(--cm-font-ui);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--cm-primary-700);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--cm-primary-800);
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  border: 0;
}

code {
  color: var(--cm-brand-ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 20;
  transform: translateY(-150%);
  background: var(--cm-neutral-0);
  color: var(--cm-brand-ink);
  padding: 10px 14px;
  border: 1px solid var(--cm-neutral-300);
  border-radius: 6px;
}

.skip-link:focus {
  transform: translateY(0);
  outline: 3px solid rgba(0, 161, 233, 0.32);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--cm-header);
  padding: 0 32px;
  background: rgba(255, 255, 255, 0.94);
  border-top: 8px solid var(--cm-brand-cyan);
  border-bottom: 1px solid var(--cm-neutral-200);
  backdrop-filter: blur(12px);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.brand-mark img {
  width: 216px;
  height: auto;
}

.nav-toggle {
  display: none;
  min-width: 72px;
  min-height: 44px;
  color: var(--cm-brand-ink);
  background: var(--cm-neutral-0);
  border: 1px solid var(--cm-neutral-300);
  border-radius: 6px;
  font-weight: 700;
}

.shell {
  display: grid;
  grid-template-columns: var(--cm-sidebar) minmax(0, 1fr);
  max-width: calc(var(--cm-content) + var(--cm-sidebar) + 96px);
  margin: 0 auto;
  padding: 0 48px;
}

.side-nav {
  position: sticky;
  top: var(--cm-header);
  align-self: start;
  height: calc(100vh - var(--cm-header));
  padding: 40px 30px 40px 0;
  overflow: auto;
  border-right: 1px solid var(--cm-neutral-200);
}

.side-nav a {
  display: block;
  padding: 10px 0;
  color: var(--cm-neutral-600);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.side-nav a:hover,
.side-nav a.is-active {
  color: var(--cm-brand-ink);
}

.side-nav a.is-active {
  border-bottom: 2px solid var(--cm-brand-cyan);
}

.content {
  max-width: var(--cm-content);
  min-width: 0;
  padding: 0 0 96px 64px;
}

.doc-section {
  padding: 64px 0;
  border-bottom: 1px solid var(--cm-neutral-200);
}

.hero-section {
  padding-top: 76px;
}

.section-kicker {
  margin-bottom: 10px;
  color: var(--cm-neutral-600);
  font-size: 14px;
  font-weight: 700;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  color: var(--cm-brand-ink);
  font-size: 56px;
  line-height: 1.1;
  font-weight: 700;
}

h2 {
  margin-bottom: 18px;
  color: var(--cm-brand-ink);
  font-size: 35px;
  line-height: 1.14;
  font-weight: 700;
}

h3 {
  margin-bottom: 8px;
  color: var(--cm-brand-ink);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 700;
}

h4 {
  margin-bottom: 14px;
  color: var(--cm-brand-ink);
  font-size: 20px;
  line-height: 1.35;
  font-weight: 700;
}

p {
  max-width: 820px;
  margin-bottom: 24px;
  color: var(--cm-neutral-700);
}

.lead {
  max-width: 860px;
  color: var(--cm-neutral-700);
  font-size: 18px;
  line-height: 1.75;
}

.title-rule {
  width: 100%;
  height: 2px;
  margin: 0 0 28px;
  background: var(--cm-brand-cyan);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  margin-top: 44px;
  border-top: 1px solid var(--cm-neutral-200);
  border-bottom: 1px solid var(--cm-neutral-200);
}

.summary-grid > div {
  padding: 24px 0 26px;
}

.summary-grid h2 {
  margin-bottom: 10px;
  font-size: 24px;
}

.summary-grid p {
  margin-bottom: 0;
  font-size: 15px;
}

.scope-flow {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 42px;
  margin-top: 34px;
  border-top: var(--cm-rule);
  border-bottom: 1px solid var(--cm-neutral-200);
}

.scope-flow > div {
  padding: 26px 0 28px;
}

.scope-flow span {
  display: block;
  margin-bottom: 8px;
  color: var(--cm-neutral-600);
  font-size: 13px;
  font-weight: 700;
}

.scope-flow strong {
  display: block;
  margin-bottom: 12px;
  color: var(--cm-brand-ink);
  font-size: 26px;
  line-height: 1.25;
}

.scope-flow p {
  margin-bottom: 0;
  font-size: 15px;
}

.source-ledger {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  column-gap: 34px;
  margin-top: 34px;
  border-top: var(--cm-rule);
  border-bottom: 1px solid var(--cm-neutral-200);
}

.source-ledger > div {
  padding: 24px 0 26px;
}

.source-ledger span,
.page-inventory span {
  display: block;
  margin-bottom: 8px;
  color: var(--cm-neutral-600);
  font-size: 13px;
  font-weight: 700;
}

.source-ledger strong {
  display: block;
  margin-bottom: 10px;
  color: var(--cm-brand-ink);
  font-size: 20px;
  line-height: 1.32;
}

.source-ledger p,
.page-inventory p {
  margin-bottom: 0;
  font-size: 14px;
}

.audit-table {
  margin-top: 34px;
  border-top: 1px solid var(--cm-neutral-200);
}

.audit-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) 150px;
  gap: 28px;
  align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--cm-neutral-200);
}

.audit-row h3 {
  margin-bottom: 0;
}

.audit-row p {
  margin-bottom: 0;
}

.audit-row strong {
  color: var(--cm-primary-700);
  font-size: 14px;
}

.page-inventory {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  column-gap: 22px;
  margin-top: 34px;
  border-top: 1px solid var(--cm-neutral-200);
  border-bottom: 1px solid var(--cm-neutral-200);
}

.page-inventory > div {
  padding: 18px 0 20px;
}

.roadmap {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 42px;
  margin-top: 32px;
  border-top: 1px solid var(--cm-neutral-200);
}

.roadmap article {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) 72px;
  gap: 18px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--cm-neutral-200);
}

.roadmap span,
.roadmap strong {
  color: var(--cm-neutral-600);
  font-size: 13px;
  font-weight: 700;
}

.roadmap h3 {
  margin-bottom: 4px;
  font-size: 18px;
}

.roadmap p {
  margin-bottom: 0;
  font-size: 14px;
}

.rule-table {
  margin-top: 30px;
  border-top: 1px solid var(--cm-neutral-200);
}

.rule-row {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding: 22px 0;
  border-bottom: 1px solid var(--cm-neutral-200);
}

.rule-row h3 {
  margin-bottom: 0;
}

.rule-row p {
  margin-bottom: 0;
}

.avoid-list {
  margin-top: 36px;
  padding-top: 24px;
  border-top: var(--cm-rule);
}

.avoid-list p {
  margin-bottom: 0;
}

.phase-check {
  margin-top: 36px;
  border-top: var(--cm-rule);
}

.phase-check h3 {
  padding-top: 24px;
}

.check-row {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 28px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--cm-neutral-200);
}

.check-row strong {
  color: var(--cm-brand-ink);
  font-size: 18px;
}

.check-row p {
  margin-bottom: 0;
}

.logo-hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  margin: 12px 0 34px;
  background: var(--cm-neutral-0);
  border-top: 1px solid var(--cm-neutral-200);
  border-bottom: 1px solid var(--cm-neutral-200);
}

.logo-hero img {
  width: 680px;
}

.logo-table .rule-row {
  grid-template-columns: 150px 280px minmax(0, 1fr);
}

.logo-table figure {
  display: flex;
  align-items: center;
  min-height: 68px;
  margin: 0;
}

.logo-table img {
  max-height: 54px;
}

.logo-table .symbol {
  max-width: 72px;
  max-height: 58px;
}

.comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 34px;
  margin-top: 42px;
}

.comparison > div {
  min-width: 0;
}

.comparison h3 {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--cm-neutral-200);
}

.mock {
  min-height: 240px;
  padding: 28px;
  background: var(--cm-neutral-0);
  border: 1px solid var(--cm-neutral-200);
  border-radius: 8px;
}

.mock p {
  margin-bottom: 0;
  font-size: 14px;
}

.logo-good {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 34px;
}

.logo-good img {
  width: 280px;
}

.logo-bad {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 28px;
}

.fake-logo {
  width: 220px;
  padding: 18px;
  color: var(--cm-brand-ink);
  background: var(--cm-brand-yellow);
  border: 6px solid var(--cm-neutral-0);
  box-shadow: 0 0 0 1px var(--cm-brand-cyan);
  font-weight: 700;
}

.swatches {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 26px;
  margin-top: 32px;
}

.swatch {
  display: grid;
  grid-template-rows: 64px auto auto;
  gap: 12px;
  width: 100%;
  min-height: 160px;
  padding: 0 0 18px;
  text-align: left;
  color: var(--cm-neutral-900);
  background: transparent;
  border-bottom: 1px solid var(--cm-neutral-200);
  cursor: pointer;
}

.swatch span {
  background: var(--swatch);
}

.swatch strong,
.swatch code {
  display: block;
}

.swatch strong {
  font-size: 16px;
}

.swatch:focus-visible,
.token-row button:focus-visible,
.nav-toggle:focus-visible {
  outline: 3px solid rgba(0, 161, 233, 0.32);
  outline-offset: 3px;
}

.color-good strong,
.color-bad strong {
  display: block;
  margin-bottom: 18px;
  font-size: 22px;
}

.color-good span {
  display: block;
  width: 100%;
  height: 2px;
  margin-bottom: 24px;
  background: var(--cm-brand-cyan);
}

.color-bad {
  color: var(--cm-neutral-0);
  background: var(--cm-brand-cyan);
}

.color-bad p,
.color-bad strong {
  color: var(--cm-neutral-0);
}

.color-bad div {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-bottom: 24px;
}

.color-bad div::before,
.color-bad div::after {
  content: "";
  height: 38px;
  background: var(--cm-brand-yellow);
}

.type-scale {
  margin-top: 28px;
  border-top: 1px solid var(--cm-neutral-200);
}

.type-scale > div {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) 150px;
  gap: 28px;
  align-items: baseline;
  padding: 24px 0;
  border-bottom: 1px solid var(--cm-neutral-200);
}

.type-scale span {
  color: var(--cm-neutral-600);
  font-weight: 700;
}

.type-scale p {
  margin-bottom: 0;
}

.display-sample {
  color: var(--cm-brand-ink);
  font-size: 40px;
  line-height: 1.2;
  font-weight: 700;
}

.page-title-sample {
  color: var(--cm-brand-ink);
  font-size: 32px;
  line-height: 1.25;
  font-weight: 700;
}

.section-title-sample {
  color: var(--cm-brand-ink);
  font-size: 24px;
  line-height: 1.35;
  font-weight: 700;
}

.layout-good h4,
.layout-bad h4 {
  font-size: 24px;
}

.layout-good > span {
  display: block;
  height: 2px;
  margin-bottom: 20px;
  background: var(--cm-brand-cyan);
}

.mini-row {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 18px;
  padding: 12px 0;
  border-bottom: 1px solid var(--cm-neutral-200);
}

.mini-row em {
  color: var(--cm-neutral-700);
  font-style: normal;
}

.layout-bad p {
  margin-bottom: 18px;
  color: var(--cm-neutral-500);
}

.mini-boxes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.mini-boxes span {
  min-height: 56px;
  padding: 18px;
  color: var(--cm-neutral-600);
  background: var(--cm-neutral-100);
  border: 1px solid var(--cm-neutral-200);
  border-radius: 8px;
}

.token-table {
  margin-top: 32px;
  border-top: 1px solid var(--cm-neutral-200);
}

.token-row {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) 180px 88px;
  gap: 28px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--cm-neutral-200);
}

.token-row button {
  min-height: 40px;
  color: var(--cm-primary-700);
  background: var(--cm-neutral-0);
  border: 1px solid var(--cm-neutral-300);
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
}

.copy-toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 30;
  min-width: 180px;
  padding: 12px 16px;
  color: var(--cm-neutral-0);
  background: var(--cm-brand-ink);
  border-radius: 6px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 160ms ease, transform 160ms ease;
  pointer-events: none;
}

.copy-toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1100px) {
  .shell {
    grid-template-columns: 1fr;
    padding: 0 28px;
  }

  .site-header {
    padding: 0 24px;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .side-nav {
    position: fixed;
    inset: var(--cm-header) 0 auto 0;
    z-index: 9;
    display: none;
    height: auto;
    max-height: calc(100vh - var(--cm-header));
    padding: 18px 28px;
    background: var(--cm-neutral-0);
    border-right: 0;
    border-bottom: 1px solid var(--cm-neutral-200);
  }

  .side-nav.is-open {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
  }

  .content {
    padding-left: 0;
  }

  .summary-grid,
  .scope-flow,
  .source-ledger,
  .comparison,
  .swatches {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 720px) {
  .site-header {
    padding: 0 16px;
  }

  .brand-mark img {
    width: 174px;
  }

  .shell {
    padding: 0 18px;
  }

  .doc-section {
    padding: 44px 0;
  }

  .hero-section {
    padding-top: 48px;
  }

  h1 {
    font-size: 40px;
  }

  h2 {
    font-size: 31px;
  }

  .lead {
    font-size: 17px;
  }

  .side-nav.is-open {
    grid-template-columns: 1fr;
  }

  .rule-row,
  .logo-table .rule-row,
  .type-scale > div,
  .token-row,
  .audit-row,
  .check-row,
  .roadmap article {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .page-inventory {
    grid-template-columns: 1fr;
  }

  .logo-hero {
    min-height: 170px;
  }

  .logo-hero img {
    width: 420px;
  }

  .mock {
    padding: 20px;
  }
}