:root {
  color-scheme: light only;
  --color-canvas: #f4f6f5;
  --color-surface: #ffffff;
  --color-ink: #17201e;
  --color-ink-muted: #52605c;
  --color-border: #71807b;
  --color-divider: #cbd3d0;
  --color-link: #075f5b;
  --color-link-hover: #034744;
  --color-soft: #e5efec;
  --color-focus: #005fcc;
  --color-mark: #ffdda3;
  --spacing-2: 2px;
  --spacing-4: 4px;
  --spacing-6: 6px;
  --spacing-12: 12px;
  --spacing-24: 24px;
  --spacing-36: 36px;
  --spacing-48: 48px;
  --spacing-72: 72px;
  --spacing-96: 96px;
  --content-width: 76rem;
  --reading-width: 48rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--spacing-24);
}

body {
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-size: 16px;
  line-height: 1.75;
}

a {
  color: var(--color-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-link-hover);
  text-decoration-thickness: 2px;
}

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

.skip-link {
  position: fixed;
  z-index: 100;
  inset: var(--spacing-12) auto auto var(--spacing-12);
  padding: var(--spacing-12) var(--spacing-24);
  transform: translateY(-160%);
  background: var(--color-surface);
  border: 2px solid var(--color-ink);
  color: var(--color-ink);
}

.skip-link:focus {
  transform: translateY(0);
}

.page-shell {
  width: min(calc(100% - var(--spacing-48)), var(--content-width));
  margin-inline: auto;
}

.document-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-24);
  margin-bottom: var(--spacing-24);
}

.site-name {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-12);
  min-height: 44px;
  color: var(--color-ink);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
}

.site-name img {
  width: 40px;
  height: 41px;
  object-fit: contain;
}

.site-name span {
  color: var(--color-ink-muted);
}

.source-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--color-ink-muted);
  font-size: 0.875rem;
}

.search-panel {
  margin-bottom: var(--spacing-24);
  border-block: 1px solid var(--color-divider);
}

.search-panel summary {
  width: fit-content;
  min-height: 44px;
  padding-block: 10px;
  color: var(--color-ink-muted);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.search-panel[open] summary {
  color: var(--color-ink);
}

.search-panel__body {
  padding-bottom: var(--spacing-24);
}

.search-status {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 0.875rem;
}

.search-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--spacing-12);
  margin-top: var(--spacing-12);
}

input[type="search"] {
  width: 100%;
  min-height: 48px;
  padding: var(--spacing-12) var(--spacing-24);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-surface);
  color: var(--color-ink);
  font: inherit;
}

input[type="search"]:disabled {
  background: var(--color-canvas);
  color: var(--color-ink-muted);
}

#search-clear {
  min-height: 48px;
  padding-inline: var(--spacing-12);
  border: 0;
  background: transparent;
  color: var(--color-link);
  font: inherit;
  text-decoration: underline;
  text-underline-offset: 0.18em;
  cursor: pointer;
}

#search-clear:hover {
  color: var(--color-link-hover);
}

.search-status {
  min-height: 1.6em;
  margin-top: var(--spacing-6);
}

.search-results {
  margin-top: var(--spacing-24);
  border-top: 1px solid var(--color-divider);
}

.search-results ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.search-results li + li {
  border-top: 1px solid var(--color-divider);
}

.search-results a {
  display: grid;
  gap: var(--spacing-4);
  padding-block: var(--spacing-12);
  color: var(--color-ink);
  text-decoration: none;
}

.search-results a:hover .search-result__title {
  color: var(--color-link-hover);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.18em;
}

.search-result__title {
  color: var(--color-link);
  font-weight: 650;
}

.search-result__excerpt,
.no-results {
  color: var(--color-ink-muted);
  font-size: 0.9375rem;
}

.no-results {
  margin: var(--spacing-24) 0 0;
}

mark {
  background: var(--color-mark);
  color: inherit;
  padding-inline: var(--spacing-2);
}

.page-shell {
  display: grid;
  grid-template-columns: 16rem minmax(0, var(--reading-width));
  justify-content: center;
  gap: var(--spacing-72);
  padding-block: var(--spacing-36) var(--spacing-96);
}

.toc-sticky {
  position: sticky;
  top: var(--spacing-24);
  max-height: calc(100vh - var(--spacing-48));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: var(--spacing-12);
}

.toc-title {
  margin: 0 0 var(--spacing-12);
  font-weight: 700;
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc-list ol {
  list-style: none;
  margin: var(--spacing-6) 0 0;
  padding-left: 1.25rem;
}

.toc-list > li + li {
  margin-top: var(--spacing-12);
}

.toc-list ol li + li {
  margin-top: var(--spacing-4);
}

.toc-list a {
  color: var(--color-ink-muted);
  font-size: 0.875rem;
  line-height: 1.5;
  text-decoration: none;
}

.toc-list a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.document-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-6) var(--spacing-24);
  margin-bottom: var(--spacing-36);
  color: var(--color-ink-muted);
  font-size: 0.8125rem;
}

.mobile-toc {
  display: none;
}

.guideline-document {
  min-width: 0;
}

.guideline-document h1,
.guideline-document h2,
.guideline-document h3,
.guideline-document h4,
.guideline-document h5,
.guideline-document h6 {
  scroll-margin-top: var(--spacing-24);
  text-wrap: balance;
}

.guideline-document h1 {
  margin: 0 0 var(--spacing-24);
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.guideline-document h2 {
  margin: var(--spacing-72) 0 var(--spacing-24);
  padding-top: var(--spacing-24);
  border-top: 1px solid var(--color-divider);
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.35;
}

.guideline-document h3 {
  margin: var(--spacing-48) 0 var(--spacing-12);
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  line-height: 1.4;
}

.guideline-document h4 {
  margin: var(--spacing-36) 0 var(--spacing-12);
  font-size: 1.125rem;
  line-height: 1.45;
}

.guideline-document p,
.guideline-document ul,
.guideline-document ol,
.guideline-document blockquote,
.guideline-document pre,
.guideline-document .table-scroll {
  margin-block: 0 var(--spacing-24);
}

.guideline-document li + li {
  margin-top: var(--spacing-6);
}

.guideline-document code {
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: 4px;
  background: var(--color-soft);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.guideline-document pre {
  overflow-x: auto;
  padding: var(--spacing-24);
  border: 1px solid var(--color-divider);
  border-radius: 10px;
  background: var(--color-surface);
}

.guideline-document pre code {
  padding: 0;
  background: transparent;
  overflow-wrap: normal;
}

.guideline-document blockquote {
  margin-inline: 0;
  padding: var(--spacing-12) var(--spacing-24);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-surface);
}

.guideline-document blockquote > :last-child {
  margin-bottom: 0;
}

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-divider);
  border-radius: 10px;
  background: var(--color-surface);
}

.guideline-document table {
  width: 100%;
  min-width: 34rem;
  border-collapse: collapse;
  line-height: 1.55;
}

.guideline-document th,
.guideline-document td {
  padding: var(--spacing-12);
  border-bottom: 1px solid var(--color-divider);
  text-align: left;
  vertical-align: top;
}

.guideline-document th {
  background: var(--color-soft);
  font-weight: 650;
}

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

.document-footer {
  margin-top: var(--spacing-72);
  padding-top: var(--spacing-24);
  border-top: 1px solid var(--color-divider);
  color: var(--color-ink-muted);
  font-size: 0.9375rem;
}

.document-footer p {
  margin: 0 0 var(--spacing-12);
}

.error-page {
  width: min(calc(100% - var(--spacing-48)), 42rem);
  margin-inline: auto;
  padding-block: var(--spacing-96);
}

.error-code {
  margin: 0;
  color: var(--color-ink-muted);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.error-page h1 {
  margin: var(--spacing-12) 0 var(--spacing-24);
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.25;
}

.primary-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: var(--spacing-12);
  font-weight: 650;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 62rem) {
  .page-shell {
    grid-template-columns: minmax(0, var(--reading-width));
    gap: 0;
  }

  .desktop-toc {
    display: none;
  }

  .mobile-toc {
    display: block;
    margin-bottom: var(--spacing-36);
    border-block: 1px solid var(--color-divider);
  }

  .mobile-toc summary {
    min-height: 48px;
    padding-block: var(--spacing-12);
    font-weight: 650;
    cursor: pointer;
  }

  .mobile-toc nav {
    padding: 0 0 var(--spacing-24);
  }
}

@media (max-width: 40rem) {
  .page-shell {
    width: min(calc(100% - var(--spacing-24)), var(--content-width));
  }

  .source-link {
    font-size: 0.8125rem;
    text-align: right;
  }

  .search-control {
    grid-template-columns: 1fr;
  }

  #search-clear {
    justify-self: start;
  }

  .page-shell {
    padding-block: var(--spacing-36) var(--spacing-72);
  }

  .guideline-document h1 {
    font-size: 2rem;
  }

  .guideline-document h2 {
    margin-top: var(--spacing-48);
  }

  .guideline-document h3 {
    margin-top: var(--spacing-36);
  }

  .guideline-document ul,
  .guideline-document ol {
    padding-left: var(--spacing-24);
  }
}

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

@media (forced-colors: active) {
  :root {
    --color-canvas: Canvas;
    --color-surface: Canvas;
    --color-ink: CanvasText;
    --color-ink-muted: CanvasText;
    --color-border: ButtonBorder;
    --color-divider: ButtonBorder;
    --color-link: LinkText;
    --color-link-hover: LinkText;
    --color-soft: Canvas;
    --color-focus: Highlight;
    --color-mark: Mark;
  }
}

@media print {
  :root {
    --color-canvas: #ffffff;
    --color-surface: #ffffff;
    --color-ink: #000000;
    --color-ink-muted: #333333;
    --color-divider: #777777;
  }

  @page {
    margin: 18mm;
  }

  body {
    font-size: 10.5pt;
    line-height: 1.6;
    background: #ffffff;
  }

  .document-toolbar,
  .search-panel,
  .desktop-toc,
  .mobile-toc,
  .document-meta,
  .document-footer,
  .skip-link {
    display: none !important;
  }

  .page-shell {
    display: block;
    width: auto;
    padding: 0;
  }

  .guideline-document h1,
  .guideline-document h2,
  .guideline-document h3,
  .guideline-document h4 {
    break-after: avoid;
  }

  .guideline-document h2 {
    margin-top: var(--spacing-48);
  }

  .guideline-document p,
  .guideline-document li,
  .guideline-document table,
  .guideline-document pre,
  .guideline-document blockquote {
    orphans: 3;
    widows: 3;
  }

  .table-scroll {
    overflow: visible;
    border-color: #777777;
  }

  .guideline-document table {
    min-width: 0;
    font-size: 8.5pt;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    overflow-wrap: anywhere;
    font-size: 0.85em;
  }
}