:root {
  --color-primary: #2A4D7A;
  --color-secondary: #3E7C6A;
  --color-accent: #C96B2C;
  --color-background: #F6F2EA;
  --color-surface: #FFFFFF;
  --color-text: #1B1F24;
  --color-text-muted: #4E5A66;
  --color-border: #D7D0C6;
  --radius: 2px;
  --space: 1rem;
  --max-width: 1200px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  font-weight: 400;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 1.5rem;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  margin-top: 2rem;
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  margin-top: 1.5rem;
}

h4 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
}

h5 {
  font-size: clamp(1rem, 2vw, 1.25rem);
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease, text-decoration 0.2s ease;
}

a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius);
}

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

ul, ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

body {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
  grid-template-areas:
    "header"
    "main"
    "footer";
  min-height: 100vh;
}

header {
  grid-area: header;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: calc(var(--space) * 1.5) var(--space);
}

header .header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

header .site-name {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

header nav a {
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

main {
  grid-area: main;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: calc(var(--space) * 2) var(--space);
}

footer {
  grid-area: footer;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: calc(var(--space) * 1.5) var(--space);
  margin-top: calc(var(--space) * 3);
}

footer .footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.two-column-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--space) * 2);
}

aside {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: calc(var(--space) * 1.5);
  border-radius: var(--radius);
}

aside h2, aside h3, aside h4 {
  font-size: 1.125rem;
  margin-top: 0;
}

blockquote {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: calc(var(--space) * 1.5);
  margin: calc(var(--space) * 2) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: calc(var(--space) * 2) 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
}

.table-wrapper {
  overflow-x: auto;
  margin: calc(var(--space) * 2) 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

caption {
  font-weight: 700;
  text-align: left;
  padding: var(--space);
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  font-size: 1.125rem;
}

thead {
  background-color: var(--color-primary);
  color: var(--color-surface);
}

th {
  padding: calc(var(--space) * 0.75) var(--space);
  text-align: left;
  font-weight: 700;
  border: 1px solid var(--color-border);
}

td {
  padding: calc(var(--space) * 0.75) var(--space);
  border: 1px solid var(--color-border);
}

tbody tr:nth-child(even) {
  background-color: var(--color-background);
}

tbody tr:hover {
  background-color: rgba(42, 77, 122, 0.05);
  transition: background-color 0.2s ease;
}

details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: var(--space);
  overflow: hidden;
}

summary {
  padding: var(--space);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background-color 0.2s ease;
}

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

summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  transition: transform 0.3s ease;
}

details[open] summary::after {
  transform: rotate(45deg);
}

summary:hover {
  background-color: var(--color-background);
}

summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

details .details-content {
  padding: 0 var(--space) var(--space) var(--space);
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

nav[aria-label="Breadcrumb"] {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: calc(var(--space) * 2);
}

nav[aria-label="Breadcrumb"] ol {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
}

nav[aria-label="Breadcrumb"] li {
  margin: 0;
  display: flex;
  align-items: center;
}

nav[aria-label="Breadcrumb"] li:not(:last-child)::after {
  content: '›';
  margin-left: 0.5rem;
  color: var(--color-text-muted);
}

nav[aria-label="Breadcrumb"] a {
  color: var(--color-text-muted);
}

nav[aria-label="Breadcrumb"] a:hover {
  color: var(--color-primary);
}

.grid-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space);
  margin: calc(var(--space) * 2) 0;
}

.grid-list-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space);
  border-radius: var(--radius);
}

.grid-list-item h3, .grid-list-item h4 {
  margin-top: 0;
  font-size: 1.125rem;
}

.authority-links {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: calc(var(--space) * 1.5);
  margin: calc(var(--space) * 2) 0;
  border-radius: var(--radius);
}

.authority-links h2, .authority-links h3 {
  font-size: 1.125rem;
  margin-top: 0;
}

.authority-links ul {
  margin-bottom: 0;
}

.authority-links a {
  font-weight: 500;
}

ol.numbered-list {
  counter-reset: item;
  list-style: none;
  padding-left: 0;
}

ol.numbered-list > li {
  counter-increment: item;
  margin-bottom: calc(var(--space) * 1.5);
  padding-left: 2.5rem;
  position: relative;
}

ol.numbered-list > li::before {
  content: counter(item);
  position: absolute;
  left: 0;
  top: 0;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-primary);
  line-height: 1;
}

@media (min-width: 768px) {
  header .header-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  footer .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .two-column-grid {
    grid-template-columns: 2fr 1fr;
  }

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

  .authority-links ul {
    columns: 2;
    column-gap: calc(var(--space) * 2);
  }
}

@media (min-width: 1024px) {
  .grid-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .two-column-text {
    column-count: 2;
    column-gap: calc(var(--space) * 3);
  }

  .two-column-text h2, .two-column-text h3 {
    column-span: all;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  details[open] summary::after {
    transform: none;
  }

  @keyframes slideDown {
    from, to {
      opacity: 1;
      transform: none;
    }
  }
}

@media print {
  body {
    background-color: white;
    color: black;
  }

  header, footer, nav, aside {
    display: none;
  }

  main {
    max-width: 100%;
    padding: 0;
  }

  a {
    color: black;
    text-decoration: underline;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.875rem;
  }

  details {
    border: 1px solid black;
  }

  summary::after {
    display: none;
  }

  details .details-content {
    display: block !important;
  }

  table, blockquote, .grid-list-item {
    page-break-inside: avoid;
  }
}