:root {
  --color-primary: #2E3A8C;
  --color-secondary: #0F766E;
  --color-accent: #D97706;
  --color-background: #FBF7F0;
  --color-surface: #FFFFFF;
  --color-text: #111827;
  --color-text-muted: #4B5563;
  --color-border: #D6D3D1;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.10);
  --maxw: 72rem;
  --space: 1rem;
}

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

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  line-height: 1.6;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--color-background);
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.7;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 100%;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  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: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

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

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

h1 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

h2 {
  font-size: 1.5rem;
  margin-top: 2rem;
}

h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
}

p {
  margin-bottom: 1rem;
}

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

li {
  margin-bottom: 0.5rem;
}

header {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

header .site-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  font-variant: small-caps;
  color: var(--color-primary);
  text-decoration: none;
  display: inline-block;
}

header .site-name:hover {
  color: var(--color-secondary);
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

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

nav a:hover {
  color: var(--color-primary);
  transform: translateY(-1px);
}

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

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space);
  background: var(--color-accent);
  color: var(--color-surface);
  padding: 0.5rem 1rem;
  text-decoration: none;
  border-radius: var(--radius);
  z-index: 200;
}

.skip-link:focus {
  top: var(--space);
}

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

article {
  background-color: var(--color-surface);
  padding: calc(var(--space) * 2);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: calc(var(--space) * 2);
}

section {
  margin-bottom: calc(var(--space) * 3);
}

aside {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: var(--space);
  margin: calc(var(--space) * 1.5) 0;
  border-radius: var(--radius);
}

blockquote {
  background-color: var(--color-surface);
  border-left: 5px solid var(--color-accent);
  padding: var(--space) calc(var(--space) * 1.5);
  margin: calc(var(--space) * 1.5) 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: calc(var(--space) * 1.5) 0;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

caption {
  font-weight: 700;
  text-align: left;
  padding: var(--space);
  background-color: var(--color-primary);
  color: var(--color-surface);
  font-size: 1.1rem;
}

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

th {
  padding: 0.75rem var(--space);
  text-align: left;
  font-weight: 600;
}

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

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

tbody tr:hover {
  background-color: rgba(46, 58, 140, 0.05);
  transition: background-color 0.2s ease;
}

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

details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space);
  margin-bottom: var(--space);
  box-shadow: 0 2px 8px rgba(17, 24, 39, 0.05);
}

summary {
  font-weight: 600;
  cursor: pointer;
  padding: 0.5rem;
  margin: calc(var(--space) * -1);
  margin-bottom: 0;
  padding: var(--space);
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease;
  list-style: none;
  display: flex;
  align-items: center;
}

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

summary::before {
  content: '▶';
  display: inline-block;
  margin-right: 0.5rem;
  transition: transform 0.3s ease;
  color: var(--color-accent);
}

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

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

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

details[open] summary {
  margin-bottom: var(--space);
  border-bottom: 1px solid var(--color-border);
}

details div {
  padding-top: var(--space);
}

nav[aria-label="Breadcrumb"] {
  margin-bottom: calc(var(--space) * 2);
}

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

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);
  font-weight: 700;
}

nav[aria-label="Breadcrumb"] a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

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

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

footer .footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space);
}

footer nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

footer nav a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

footer p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: 0;
}

button, .button {
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

button:hover, .button:hover {
  background-color: var(--color-secondary);
  transform: translateY(-2px);
}

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

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

@media (min-width: 768px) {
  html {
    font-size: 106.25%;
  }

  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.875rem;
  }

  h3 {
    font-size: 1.5rem;
  }

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

  header .site-name {
    font-size: 1.75rem;
  }

  nav ul {
    gap: 2rem;
  }

  main {
    padding: calc(var(--space) * 3) var(--space);
  }

  article {
    padding: calc(var(--space) * 3);
  }

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

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

@media (min-width: 1024px) {
  html {
    font-size: 112.5%;
  }

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

  main {
    display: grid;
    grid-template-columns: 1fr 20rem;
    gap: calc(var(--space) * 3);
    align-items: start;
  }

  main > article:first-child {
    grid-column: 1 / -1;
  }

  main > section {
    grid-column: 1 / -1;
  }
}

@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;
  }

  summary::before {
    transition: none;
  }

  nav a:hover {
    transform: none;
  }

  button:hover, .button:hover {
    transform: none;
  }
}

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

  header {
    position: static;
    box-shadow: none;
  }

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

  article, aside, blockquote, table {
    box-shadow: none;
  }

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

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }

  nav[aria-label="Breadcrumb"] a[href^="http"]::after,
  footer a[href^="http"]::after {
    content: "";
  }

  details {
    border: 1px solid black;
  }

  summary::before {
    content: '';
  }

  details[open] summary {
    border-bottom: 1px solid black;
  }

  button, .button {
    border: 1px solid black;
    background-color: white;
    color: black;
  }
}