:root {
  --color-bg: #F6F4EF;
  --color-surface: #FFFFFF;
  --color-text: #14161A;
  --color-muted: #4B5563;
  --color-border: #D6D2C8;
  --color-primary: #2D3A8C;
  --color-secondary: #0E6F6A;
  --color-accent: #C24B2E;
  --radius: 0.25rem;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --space: 1rem;
  --maxw: 1200px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  margin: 0;
  padding: 0;
  font-size: 1rem;
}

@media (min-width: 768px) {
  body {
    font-size: 1.125rem;
  }
}

@media (min-width: 1024px) {
  body {
    font-size: 1.25rem;
  }
}

body {
  display: grid;
  grid-template-areas:
    "header"
    "breadcrumb"
    "main"
    "footer";
  grid-template-rows: auto auto 1fr auto;
  min-height: 100vh;
  gap: var(--space);
  padding: var(--space);
  max-width: var(--maxw);
  margin: 0 auto;
}

@media (min-width: 1024px) {
  body {
    grid-template-areas:
      "header header"
      "breadcrumb breadcrumb"
      "main aside"
      "footer footer";
    grid-template-columns: 1fr 300px;
    gap: calc(var(--space) * 2);
  }
}

header {
  grid-area: header;
  background-color: var(--color-surface);
  padding: calc(var(--space) * 1.5);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: var(--space);
}

header h1 {
  margin: 0 0 var(--space) 0;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
}

@media (min-width: 768px) {
  header h1 {
    font-size: 2rem;
  }
}

header nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: calc(var(--space) * 1.5);
  flex-wrap: wrap;
}

header nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease;
}

@media (prefers-reduced-motion: reduce) {
  header nav a {
    transition: none;
  }
}

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

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

nav[aria-label="breadcrumb"] {
  grid-area: breadcrumb;
  background-color: var(--color-surface);
  padding: var(--space);
  border-radius: var(--radius);
  margin-bottom: var(--space);
}

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

nav[aria-label="breadcrumb"] li:not(:last-child)::after {
  content: '>';
  margin-left: 0.5rem;
  color: var(--color-muted);
}

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

nav[aria-label="breadcrumb"] a:hover {
  text-decoration: underline;
}

main {
  grid-area: main;
  background-color: var(--color-surface);
  padding: calc(var(--space) * 2);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

main > h1 {
  margin-top: 0;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: calc(var(--space) * 1.5);
}

@media (min-width: 768px) {
  main > h1 {
    font-size: 2.5rem;
  }
}

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

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

p {
  margin-bottom: var(--space);
  line-height: 1.7;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 0.2em;
}

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

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

ul, ol {
  margin-bottom: var(--space);
  padding-left: calc(var(--space) * 1.5);
}

li {
  margin-bottom: 0.5rem;
}

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);
}

table caption {
  font-weight: 600;
  color: var(--color-primary);
  text-align: left;
  padding: var(--space);
  background-color: var(--color-bg);
  font-size: 1.1rem;
}

th {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: calc(var(--space) * 0.75);
  text-align: left;
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 1;
}

@media (max-width: 767px) {
  th {
    position: static;
  }
}

td {
  padding: calc(var(--space) * 0.75);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

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

tbody tr:hover {
  background-color: rgba(45, 58, 140, 0.05);
}

blockquote {
  margin: calc(var(--space) * 1.5) 0;
  padding: calc(var(--space) * 1.5);
  background-color: rgba(45, 58, 140, 0.05);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--color-text);
}

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

details {
  margin-bottom: var(--space);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

summary {
  padding: var(--space);
  background-color: var(--color-bg);
  cursor: pointer;
  font-weight: 600;
  color: var(--color-primary);
  transition: background-color 0.2s ease;
  user-select: none;
}

@media (prefers-reduced-motion: reduce) {
  summary {
    transition: none;
  }
}

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

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

details[open] summary {
  background-color: var(--color-primary);
  color: var(--color-surface);
}

details div {
  padding: calc(var(--space) * 1.5);
  background-color: var(--color-surface);
}

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

aside {
  grid-area: aside;
  background-color: var(--color-bg);
  padding: calc(var(--space) * 1.5);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-secondary);
  margin: calc(var(--space) * 1.5) 0;
  font-size: 0.95rem;
}

@media (min-width: 1024px) {
  aside {
    margin: 0;
    align-self: start;
    position: sticky;
    top: var(--space);
  }
}

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

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

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

nav:not([aria-label="breadcrumb"]) ul {
  list-style: none;
  padding: 0;
  margin: var(--space) 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space);
}

nav:not([aria-label="breadcrumb"]) li {
  margin-bottom: 0;
}

nav:not([aria-label="breadcrumb"]) a {
  display: block;
  padding: 0.5rem 1rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  transition: all 0.2s ease;
}

@media (prefers-reduced-motion: reduce) {
  nav:not([aria-label="breadcrumb"]) a {
    transition: none;
  }
}

nav:not([aria-label="breadcrumb"]) a:hover {
  background-color: var(--color-primary);
  color: var(--color-surface);
  border-color: var(--color-primary);
}

footer {
  grid-area: footer;
  background-color: var(--color-surface);
  padding: calc(var(--space) * 1.5);
  border-radius: var(--radius);
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-top: calc(var(--space) * 2);
}

footer p {
  margin: 0;
}

@media (max-width: 767px) {
  table {
    font-size: 0.85rem;
  }
  
  th, td {
    padding: 0.5rem;
  }
  
  main {
    padding: var(--space);
  }
  
  header {
    padding: var(--space);
  }
  
  header h1 {
    font-size: 1.25rem;
  }
  
  main > h1 {
    font-size: 1.5rem;
  }
  
  h2 {
    font-size: 1.25rem;
  }
  
  h3 {
    font-size: 1.1rem;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  body {
    padding: calc(var(--space) * 1.5);
  }
  
  main {
    padding: calc(var(--space) * 2.5);
  }
}

@media (min-width: 1024px) {
  body {
    padding: calc(var(--space) * 2);
  }
  
  main {
    padding: calc(var(--space) * 3);
  }
  
  header {
    padding: calc(var(--space) * 2);
  }
}