:root {
  --color-primary: #1E4D8F;
  --color-secondary: #2A8C7A;
  --color-accent: #E07A2F;
  --color-background: #F6F4EF;
  --color-surface: #FFFFFF;
  --color-text: #0E1A24;
  --color-text-muted: #4B5A67;
  --color-border: #D7D2C8;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(14, 26, 36, 0.10);
  --space: 1rem;
}

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: ui-sans-serif, -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);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-surface);
  padding: 0.5rem 1rem;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space);
  color: var(--color-text);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2rem;
  margin-top: 2.5rem;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.5rem;
  margin-top: 2rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--space);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

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

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

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

header .container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.site-name {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

nav a {
  font-weight: 500;
  text-decoration: none;
  color: var(--color-text);
  transition: color 0.2s ease;
}

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

nav a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.breadcrumb {
  background-color: var(--color-surface);
  padding: 0.75rem var(--space);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb .container {
  max-width: 1200px;
  margin: 0 auto;
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb li:not(:last-child)::after {
  content: "›";
  color: var(--color-text-muted);
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

main {
  padding: 2rem var(--space);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

article {
  background-color: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

section {
  margin-bottom: 2.5rem;
}

aside {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 2rem 0;
}

aside h3 {
  margin-top: 0;
  font-size: 1.25rem;
  color: var(--color-primary);
}

blockquote {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--color-text-muted);
  border-radius: 0 var(--radius) var(--radius) 0;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(14, 26, 36, 0.08);
}

caption {
  font-weight: 700;
  font-size: 1.125rem;
  text-align: left;
  padding: 1rem;
  background-color: var(--color-background);
  color: var(--color-text);
  caption-side: top;
}

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

th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--color-border);
}

td {
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
}

tbody tr {
  transition: background-color 0.2s ease;
}

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

tbody tr:hover {
  background-color: rgba(30, 77, 143, 0.05);
}

.table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius);
}

details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

details:hover {
  border-color: var(--color-primary);
}

details[open] {
  border-left: 4px solid var(--color-accent);
  padding-left: calc(1.25rem - 3px);
}

summary {
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: color 0.2s ease;
}

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

summary::before {
  content: "▸";
  color: var(--color-primary);
  font-size: 1.25rem;
  transition: transform 0.2s ease;
  display: inline-block;
  flex-shrink: 0;
}

details[open] summary::before {
  transform: rotate(90deg);
}

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

summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

details p {
  margin-top: 1rem;
}

footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 2rem var(--space);
  margin-top: 3rem;
}

footer .container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

footer p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

footer nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

footer nav a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-decoration: none;
}

footer nav a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

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

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  article {
    padding: 3rem;
  }

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

  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

@media (min-width: 1024px) {
  main .container {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 2rem;
  }

  article {
    grid-column: 1 / -1;
  }

  article.with-aside {
    grid-column: 1 / 9;
  }

  aside {
    grid-column: 9 / -1;
    margin-top: 0;
  }

  section {
    margin-bottom: 3rem;
  }

  h1 {
    font-size: 3.5rem;
  }

  h2 {
    font-size: 2.5rem;
  }
}

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

  html {
    scroll-behavior: auto;
  }
}

@media print {
  header,
  footer,
  nav,
  .breadcrumb,
  aside {
    display: none;
  }

  body {
    background-color: white;
    color: black;
  }

  article {
    box-shadow: none;
    padding: 0;
  }

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

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