:root {
  --color-primary: #2A4B8D;
  --color-secondary: #7B2D43;
  --color-accent: #C79A2B;
  --color-background: #F6F3EE;
  --color-surface: #FFFFFF;
  --color-text: #121417;
  --color-text-muted: #4B5563;
  --color-border: #D7D0C6;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(18, 20, 23, 0.10);
  --space: 1rem;
  --maxw: 72rem;
  --transition-speed: 0.2s;
}

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

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: 1.0625rem;
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

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

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

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: calc(var(--space) * 1.25) var(--space);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space);
}

header .site-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 1.5);
  align-items: center;
}

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

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

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

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

h1 {
  font-size: 2.25rem;
  line-height: 1.2;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: calc(var(--space) * 1.5);
  letter-spacing: -0.03em;
  max-width: 42ch;
}

h2 {
  font-size: 1.75rem;
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-secondary);
  margin-top: calc(var(--space) * 2.5);
  margin-bottom: var(--space);
  letter-spacing: -0.02em;
  max-width: 48ch;
}

h3 {
  font-size: 1.375rem;
  line-height: 1.4;
  font-weight: 600;
  color: var(--color-text);
  margin-top: calc(var(--space) * 2);
  margin-bottom: calc(var(--space) * 0.75);
}

p {
  max-width: 68ch;
  margin-bottom: var(--space);
}

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

aside {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: calc(var(--space) * 1.25);
  margin: calc(var(--space) * 1.5) 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

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

blockquote {
  background-color: var(--color-surface);
  border-left: 5px solid var(--color-accent);
  padding: calc(var(--space) * 1.5);
  margin: calc(var(--space) * 1.5) 0;
  font-style: italic;
  color: var(--color-text-muted);
  border-radius: var(--radius);
  max-width: 65ch;
}

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

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

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-surface);
  font-size: 0.9375rem;
}

caption {
  font-weight: 700;
  text-align: left;
  padding: var(--space);
  background-color: var(--color-primary);
  color: var(--color-surface);
  font-size: 1.0625rem;
}

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

th {
  padding: calc(var(--space) * 0.875);
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--color-border);
}

td {
  padding: calc(var(--space) * 0.875);
  border-bottom: 1px solid var(--color-border);
}

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

tbody tr:hover {
  background-color: rgba(42, 75, 141, 0.05);
  transition: background-color var(--transition-speed) ease;
}

details {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: calc(var(--space) * 1.25);
  margin-bottom: var(--space);
  box-shadow: 0 2px 8px rgba(18, 20, 23, 0.06);
  transition: box-shadow var(--transition-speed) ease;
}

details:hover {
  box-shadow: var(--shadow);
}

details[open] {
  border-color: var(--color-primary);
  box-shadow: var(--shadow);
}

summary {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: calc(var(--space) * 0.5);
  margin: calc(var(--space) * -0.5);
  border-radius: calc(var(--radius) / 2);
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

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

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

details[open] summary::after {
  content: '−';
  transform: rotate(0deg);
}

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

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

details .details-content {
  padding-top: var(--space);
  margin-top: var(--space);
  border-top: 1px solid var(--color-border);
}

details .details-content p:last-child {
  margin-bottom: 0;
}

nav[aria-label="Breadcrumb"] {
  margin-bottom: calc(var(--space) * 1.5);
  font-size: 0.9375rem;
}

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

nav[aria-label="Breadcrumb"] li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

nav[aria-label="Breadcrumb"] li:not(:last-child)::after {
  content: '›';
  color: var(--color-text-muted);
  font-weight: 700;
}

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

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

nav[aria-label="Breadcrumb"] [aria-current="page"] {
  color: var(--color-text);
  font-weight: 600;
}

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

footer .footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: calc(var(--space) * 2) var(--space);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

footer p {
  margin: 0;
}

ul, ol {
  margin-left: calc(var(--space) * 1.5);
  margin-bottom: var(--space);
  max-width: 65ch;
}

li {
  margin-bottom: calc(var(--space) * 0.5);
}

@media (min-width: 768px) {
  h1 {
    font-size: 2.75rem;
  }

  h2 {
    font-size: 2rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  main {
    padding: calc(var(--space) * 3) calc(var(--space) * 2);
  }

  header .header-inner {
    padding: calc(var(--space) * 1.5) calc(var(--space) * 2);
  }

  footer .footer-inner {
    padding: calc(var(--space) * 2.5) calc(var(--space) * 2);
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  main {
    padding: calc(var(--space) * 4) calc(var(--space) * 2);
  }
}

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

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

  header, footer, nav {
    display: none;
  }

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

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

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

  details {
    border: 1px solid black;
  }

  details summary::after {
    display: none;
  }

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

  table {
    border: 1px solid black;
  }

  th, td {
    border: 1px solid black;
  }

  h1, h2, h3 {
    page-break-after: avoid;
  }

  table, figure, img {
    page-break-inside: avoid;
  }
}