:root {
  --color-bg: #F6F4EF;
  --color-surface: #FFFFFF;
  --color-text: #121826;
  --color-text-muted: #4B5563;
  --color-border: #D6D3CC;
  --color-primary: #1F3A5F;
  --color-secondary: #2E6F6D;
  --color-accent: #E24A3B;
  --radius: 2px;
  --space: 1rem;
  --maxw: 1200px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

.header-container {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: calc(var(--space) * 0.75);
}

.site-branding strong {
  font-size: 1.5rem;
  color: var(--color-primary);
  display: block;
}

.tagline {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 0.75);
}

nav a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius);
  transition: background-color 0.2s, color 0.2s;
}

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

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

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

.breadcrumbs {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: calc(var(--space) * 0.5) var(--space);
}

.breadcrumbs ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  max-width: var(--maxw);
  margin: 0 auto;
  font-size: 0.875rem;
}

.breadcrumbs li:not(:last-child)::after {
  content: " / ";
  margin-left: 0.5rem;
  color: var(--color-text-muted);
}

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

.breadcrumbs a:hover {
  text-decoration: underline;
}

main {
  flex: 1;
  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) * 1.5);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

h1 {
  font-size: 2rem;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: calc(var(--space) * 1.5);
  font-weight: 700;
}

h2 {
  font-size: 1.5rem;
  line-height: 1.3;
  color: var(--color-primary);
  margin-top: calc(var(--space) * 2);
  margin-bottom: var(--space);
  font-weight: 600;
}

h3 {
  font-size: 1.25rem;
  line-height: 1.4;
  color: var(--color-secondary);
  margin-top: calc(var(--space) * 1.5);
  margin-bottom: calc(var(--space) * 0.75);
  font-weight: 600;
}

section {
  margin-bottom: calc(var(--space) * 2);
}

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

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

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

a {
  color: var(--color-secondary);
  text-decoration: underline;
  transition: color 0.2s;
}

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

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

strong {
  font-weight: 600;
  color: var(--color-primary);
}

aside {
  background-color: var(--color-bg);
  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-bg);
  border-left: 4px solid var(--color-secondary);
  padding: var(--space);
  margin: calc(var(--space) * 1.5) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

.table-wrapper {
  overflow-x: auto;
  margin: calc(var(--space) * 1.5) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

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

caption {
  font-weight: 600;
  text-align: left;
  padding: calc(var(--space) * 0.75);
  background-color: var(--color-bg);
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-border);
}

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

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

th, td {
  text-align: left;
  padding: calc(var(--space) * 0.75);
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: 600;
}

tbody tr:hover {
  background-color: var(--color-bg);
}

tbody tr:last-child td {
  border-bottom: none;
}

details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: calc(var(--space) * 0.75);
  margin-bottom: var(--space);
  transition: border-color 0.2s;
}

details[open] {
  border-color: var(--color-accent);
}

summary {
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  padding: calc(var(--space) * 0.5);
  margin: calc(var(--space) * -0.5);
  border-radius: var(--radius);
  transition: background-color 0.2s, color 0.2s;
  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 0.2s;
  color: var(--color-accent);
}

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

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

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

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

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

.footer-container {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space);
  align-items: center;
  text-align: center;
}

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

.footer-container nav ul {
  justify-content: center;
}

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

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 1.75rem;
  }

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

  .footer-container nav ul {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  main {
    padding: calc(var(--space) * 3) var(--space);
  }

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

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2rem;
  }
}

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

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

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

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

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.875rem;
    color: #555;
  }

  details {
    border: 1px solid #ccc;
  }

  summary::before {
    content: "";
  }

  table {
    border: 1px solid #000;
  }

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

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