:root {
  --color-primary: #1F4B6E;
  --color-secondary: #2E7D6B;
  --color-accent: #C46A2B;
  --color-background: #F6F3EE;
  --color-surface: #FFFFFF;
  --color-text: #1A1D21;
  --color-text-muted: #5A6672;
  --color-border: #D7D0C6;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(26, 29, 33, 0.10);
  --measure: 68ch;
  --transition-speed: 0.25s;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 1fr;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.75em;
  color: var(--color-primary);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 1em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-top: 1.5em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-top: 1.25em;
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
  margin-bottom: 1.25em;
  max-width: var(--measure);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--transition-speed) ease, background-color var(--transition-speed) ease;
}

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

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

ul, ol {
  margin-bottom: 1.25em;
  padding-left: 1.5em;
  max-width: var(--measure);
}

li {
  margin-bottom: 0.5em;
}

header {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  padding: 1.5rem 1rem;
  box-shadow: var(--shadow);
}

header .header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}

header .site-name {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  margin: 0;
}

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

nav {
  width: 100%;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
}

nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: calc(var(--radius) / 2);
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  display: inline-block;
}

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

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

.breadcrumbs {
  background-color: var(--color-surface);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
}

.breadcrumbs nav {
  max-width: 1400px;
  margin: 0 auto;
}

.breadcrumbs ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.breadcrumbs li {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs li:not(:last-child)::after {
  content: "›";
  color: var(--color-text-muted);
  font-weight: 700;
}

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

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

main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem 1rem;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

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

section {
  margin-bottom: 3rem;
}

section:last-child {
  margin-bottom: 0;
}

aside {
  background-color: var(--color-surface);
  padding: 1.5rem;
  border-radius: var(--radius);
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

aside h3, aside h4 {
  color: var(--color-accent);
  margin-top: 0;
  font-size: 1.25rem;
}

blockquote {
  background-color: var(--color-surface);
  border-left: 5px solid var(--color-accent);
  padding: 1.5rem;
  margin: 2rem 0;
  border-radius: calc(var(--radius) / 2);
  font-style: italic;
  color: var(--color-text);
  box-shadow: 0 2px 8px rgba(26, 29, 33, 0.06);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  font-size: 1rem;
}

table caption {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-primary);
  text-align: left;
  padding: 1rem;
  background-color: var(--color-background);
  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:nth-child(odd) {
  background-color: var(--color-background);
}

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

tbody tr {
  transition: background-color var(--transition-speed) ease;
}

tbody tr:hover {
  background-color: rgba(31, 75, 110, 0.08);
}

.table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

details {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
  transition: border-color var(--transition-speed) ease;
}

details[open] {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(196, 106, 43, 0.15);
}

summary {
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  padding: 0.5rem;
  margin: -0.5rem;
  border-radius: calc(var(--radius) / 2);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

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

summary::before {
  content: "▶";
  display: inline-block;
  transition: transform var(--transition-speed) ease;
  color: var(--color-accent);
  font-size: 0.875rem;
  flex-shrink: 0;
}

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

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

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

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

details .details-content {
  padding: 0.5rem;
}

footer {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: 2rem 1rem;
  margin-top: 3rem;
  border-top: 4px solid var(--color-accent);
}

footer .footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  text-align: center;
}

footer p {
  margin: 0;
  max-width: none;
  font-size: 0.95rem;
}

footer a {
  color: var(--color-surface);
  text-decoration: underline;
}

footer a:hover {
  color: var(--color-accent);
}

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

  nav {
    width: auto;
  }

  main {
    padding: 3rem 2rem;
  }

  article {
    padding: 3rem;
  }

  table {
    font-size: 1.0625rem;
  }

  thead th {
    position: sticky;
    top: 0;
    z-index: 10;
    background-color: var(--color-primary);
  }
}

@media (min-width: 1024px) {
  main {
    grid-template-columns: 1fr 300px;
    gap: 3rem;
  }

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

  article {
    grid-column: 1;
  }

  aside.sidebar {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 2rem;
    align-self: start;
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
  }
}

@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;
  }
}

@media print {
  body {
    background-color: white;
    color: black;
    font-size: 12pt;
    line-height: 1.5;
  }

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

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

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

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

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.9em;
    color: #666;
  }

  details {
    border: 1px solid #ccc;
  }

  details summary::before {
    content: "";
  }

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

  table {
    box-shadow: none;
    border: 1px solid #000;
  }

  thead {
    background-color: #eee;
    color: #000;
  }

  th, td {
    border: 1px solid #000;
  }

  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
    color: #000;
  }

  blockquote {
    border-left: 3px solid #000;
    background-color: #f9f9f9;
    box-shadow: none;
  }
}