:root {
  --color-primary: #1E3A5F;
  --color-secondary: #4B6B3C;
  --color-accent: #C46A2B;
  --color-background: #F6F2EA;
  --color-surface: #FFFFFF;
  --color-text: #1A1D21;
  --color-text-muted: #4B5563;
  --color-border: #D6D0C6;
  
  --radius: 2px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --space: clamp(1rem, 2.5vw, 1.5rem);
  --maxw: 1200px;
  
  --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html {
  font-size: 100%;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

body {
  font-family: var(--font-system);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 1fr;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

a:hover {
  color: var(--color-accent);
  text-decoration-thickness: 2px;
}

a:focus {
  outline: none;
}

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

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space);
  background: var(--color-accent);
  color: var(--color-surface);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius);
  z-index: 1000;
}

.skip-link:focus {
  top: var(--space);
  outline: 3px solid var(--color-text);
  outline-offset: 2px;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 0.75em;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 4vw + 0.5rem, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.5rem, 3vw + 0.5rem, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw + 0.25rem, 2rem);
}

h4 {
  font-size: clamp(1.125rem, 2vw + 0.25rem, 1.5rem);
}

h5 {
  font-size: clamp(1rem, 1.5vw + 0.25rem, 1.25rem);
}

h6 {
  font-size: clamp(0.95rem, 1vw + 0.25rem, 1.125rem);
}

p, ul, ol, dl, table, blockquote, details {
  margin-bottom: 1.25em;
}

ul, ol {
  padding-left: 1.5em;
}

li {
  margin-bottom: 0.5em;
}

strong {
  font-weight: 600;
}

header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space) 0;
  box-shadow: var(--shadow);
}

header .container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.site-name {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 3vw, 2rem);
}

nav a {
  font-weight: 500;
  text-decoration: none;
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width 0.3s ease;
}

nav a:hover::after,
nav a:focus-visible::after {
  width: 100%;
}

.breadcrumbs {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
  font-size: 0.9rem;
}

.breadcrumbs .container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space);
}

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

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

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

@media (min-width: 1024px) {
  main.with-sidebar {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: calc(var(--space) * 2);
    align-items: start;
  }
}

article {
  background-color: var(--color-surface);
  padding: calc(var(--space) * 1.5);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

aside {
  background-color: var(--color-surface);
  padding: var(--space);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-left: 3px solid var(--color-primary);
}

@media (max-width: 1023px) {
  aside {
    margin-top: calc(var(--space) * 2);
  }
}

section {
  margin-bottom: calc(var(--space) * 2.5);
}

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

blockquote {
  border-left: 4px solid var(--color-accent);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background-color: var(--color-background);
  font-style: italic;
  color: var(--color-text-muted);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 0.95rem;
  box-shadow: var(--shadow);
}

.table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius);
}

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

@media (min-width: 768px) {
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

th {
  padding: 0.875rem 1rem;
  text-align: left;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-bottom: 2px solid var(--color-border);
}

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

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

tbody tr {
  transition: background-color 0.2s ease;
}

tbody tr:hover {
  background-color: rgba(30, 58, 95, 0.05);
}

details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
  transition: box-shadow 0.2s ease;
}

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

details[open] {
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(30, 58, 95, 0.1);
}

summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-primary);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  margin: -0.5rem -0.5rem 0;
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease;
  user-select: none;
}

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

summary::before {
  content: '▸';
  display: inline-block;
  font-size: 1.25em;
  transition: transform 0.3s ease;
  color: var(--color-accent);
}

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

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

summary:focus {
  outline: none;
}

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

details[open] summary {
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.faq-list details {
  margin-bottom: 1.5rem;
}

footer {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: calc(var(--space) * 1.5) 0;
  margin-top: calc(var(--space) * 3);
  border-top: 3px solid var(--color-accent);
}

footer .container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space);
  text-align: center;
}

footer a {
  color: var(--color-surface);
  text-decoration-color: rgba(255, 255, 255, 0.5);
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

@media (max-width: 767px) {
  table {
    font-size: 0.85rem;
  }
  
  th, td {
    padding: 0.625rem 0.75rem;
  }
  
  nav ul {
    flex-direction: column;
    gap: 0.75rem;
  }
  
  header .container {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 768px) {
  body {
    font-size: 1.0625rem;
  }
}

@media print {
  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  a {
    text-decoration: underline;
  }
  
  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.85em;
  }
  
  header, footer, nav, aside, .breadcrumbs, .skip-link {
    display: none;
  }
  
  main {
    max-width: 100%;
    padding: 0;
  }
  
  article {
    box-shadow: none;
    padding: 0;
  }
  
  h1, h2, h3 {
    page-break-after: avoid;
  }
  
  table, blockquote, details {
    page-break-inside: avoid;
  }
  
  details[open] summary::before {
    content: '';
  }
  
  summary::after {
    content: ':';
  }
}