:root {
  --color-primary: #1F2A44;
  --color-secondary: #6B2D2D;
  --color-accent: #C77D3A;
  --color-bg: #F6F2EA;
  --color-surface: #FFFFFF;
  --color-text: #121417;
  --color-muted: #4E5866;
  --color-border: #D8D0C4;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(18, 20, 23, 0.10);
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: Georgia, 'Times New Roman', serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  margin: 0;
  padding: 0;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: var(--color-surface);
  padding: 8px;
  text-decoration: none;
  border-radius: var(--radius);
  z-index: 1000;
}

.skip-link:focus {
  top: 6px;
}

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

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem;
}

.site-name {
  color: var(--color-primary);
  margin: 0;
  font-size: clamp(1.25rem, 4vw, 1.75rem);
}

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

.nav-links 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;
}

.nav-links a:hover,
.nav-links a:focus {
  background-color: var(--color-accent);
  color: var(--color-surface);
}

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

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.breadcrumbs {
  margin-bottom: 1rem;
}

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

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

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

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

h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  color: var(--color-primary);
  margin: 0 0 1.5rem 0;
  line-height: 1.2;
}

h2 {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  color: var(--color-secondary);
  margin: 2rem 0 1rem 0;
  line-height: 1.3;
}

h3 {
  font-size: clamp(1.1rem, 3vw, 1.25rem);
  color: var(--color-text);
  margin: 1.5rem 0 0.75rem 0;
}

p {
  margin: 0 0 1rem 0;
  max-width: 65ch;
}

a {
  color: var(--color-accent);
  transition: color 0.2s ease;
}

a:hover,
a:focus {
  color: var(--color-secondary);
}

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

blockquote {
  background: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow);
}

blockquote p {
  margin: 0;
  font-style: italic;
  color: var(--color-muted);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin: 1.5rem 0;
}

table caption {
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
  text-align: left;
}

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

th {
  background: var(--color-primary);
  color: var(--color-surface);
  font-weight: bold;
}

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

tbody tr:hover {
  background: rgba(199, 125, 58, 0.1);
}

.table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
}

details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin: 1rem 0;
  box-shadow: var(--shadow);
}

summary {
  padding: 1rem 1.5rem;
  cursor: pointer;
  font-weight: bold;
  color: var(--color-primary);
  transition: background-color 0.2s ease;
  position: relative;
}

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

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

summary::marker {
  content: '';
}

summary::before {
  content: '▶';
  position: absolute;
  right: 1.5rem;
  transition: transform 0.2s ease;
}

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

details div {
  padding: 0 1.5rem 1.5rem 1.5rem;
  border-top: 1px solid var(--color-border);
}

details ul {
  margin: 1rem 0 0 0;
  padding-left: 1.5rem;
}

details li {
  margin: 0.5rem 0;
  color: var(--color-muted);
}

aside {
  background: var(--color-surface);
  padding: 1.5rem;
  border-radius: var(--radius);
  border-left: 4px solid var(--color-secondary);
  box-shadow: var(--shadow);
  margin: 1.5rem 0;
}

aside h3 {
  margin-top: 0;
  color: var(--color-secondary);
}

aside ul {
  margin: 1rem 0 0 0;
  padding-left: 1.5rem;
}

aside li {
  margin: 0.5rem 0;
}

footer {
  background: var(--color-primary);
  color: var(--color-surface);
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 3rem;
}

footer p {
  margin: 0;
  max-width: none;
}

@media (min-width: 768px) {
  main {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .nav-links {
    gap: 2rem;
  }
  
  .table-wrapper {
    overflow-x: visible;
  }
}

@media (min-width: 1024px) {
  main {
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
  }
  
  aside {
    grid-column: 2;
  }
  
  article {
    grid-column: 1;
  }
  
  th {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto !important;
  }
  
  summary::before {
    transition: none;
  }
  
  details[open] summary::before {
    transform: none;
  }
}