:root {
  --color-primary: #2E4A7D;
  --color-secondary: #6B3F8C;
  --color-accent: #C06B2B;
  --color-background: #F6F2EA;
  --color-surface: #FFFFFF;
  --color-text: #1B1E24;
  --color-text-muted: #4D5561;
  --color-border: #D8D1C6;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
  
  --radius: 2px;
  --shadow: 0 1px 3px rgba(27, 30, 36, 0.08);
  
  --spacing-unit: 0.5rem;
  --grid-gap: 1.5rem;
  --max-width: 1200px;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.75rem, 1.5rem + 1.25vw, 2.5rem);
  margin-bottom: 1.5rem;
  font-weight: 700;
}

h2 {
  font-size: clamp(1.5rem, 1.35rem + 0.75vw, 2rem);
  margin-top: 2.5rem;
  margin-bottom: 1.25rem;
}

h3 {
  font-size: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  margin-top: 2rem;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

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

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

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

header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 1rem;
  box-shadow: var(--shadow);
}

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

header .site-name {
  font-size: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

header .site-name a {
  color: inherit;
  text-decoration: none;
}

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

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
}

nav a {
  text-decoration: none;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color 0.2s ease;
}

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

.breadcrumbs {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
}

.breadcrumbs-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.breadcrumbs a {
  color: var(--color-text-muted);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

.breadcrumbs span {
  color: var(--color-text-muted);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
  width: 100%;
}

@media (min-width: 768px) {
  main {
    padding: 3rem 2rem;
  }
}

@media (min-width: 1024px) {
  main {
    padding: 4rem 2rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
  }
}

section {
  background-color: var(--color-surface);
  padding: 2rem;
  margin-bottom: 2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

@media (min-width: 768px) {
  section {
    padding: 2.5rem;
  }
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 0.9375rem;
  line-height: 1.5;
}

table caption {
  caption-side: top;
  text-align: left;
  font-weight: 600;
  padding: 0.75rem 1rem;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-bottom: none;
  font-size: 0.875rem;
  letter-spacing: 0.01em;
}

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

@media (min-width: 1024px) {
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

th {
  text-align: left;
  padding: 0.875rem 1rem;
  font-weight: 600;
  border-bottom: 2px solid var(--color-border);
  letter-spacing: 0.01em;
}

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

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

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

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

tbody tr:hover {
  background-color: rgba(46, 74, 125, 0.05);
}

@media (max-width: 767px) {
  table {
    font-size: 0.875rem;
  }
  
  th, td {
    padding: 0.625rem 0.75rem;
  }
}

details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  margin: 1rem 0;
  transition: box-shadow 0.2s ease;
}

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

details[open] {
  box-shadow: 0 2px 6px rgba(27, 30, 36, 0.12);
}

summary {
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  list-style: none;
  padding: 0.5rem 0;
  color: var(--color-primary);
  transition: color 0.2s ease;
  position: relative;
  padding-left: 1.5rem;
}

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

summary::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 0.5rem;
  font-size: 1rem;
  transition: transform 0.2s ease;
  color: var(--color-accent);
}

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

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

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

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

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

blockquote {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  background-color: rgba(246, 242, 234, 0.5);
  border-left: 4px solid var(--color-accent);
  font-style: italic;
  color: var(--color-text-muted);
}

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

ul, ol {
  margin: 1rem 0 1rem 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

code {
  font-family: var(--font-mono);
  background-color: var(--color-background);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius);
  font-size: 0.9em;
  border: 1px solid var(--color-border);
}

footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 2rem 1rem;
  margin-top: auto;
  box-shadow: 0 -1px 3px rgba(27, 30, 36, 0.05);
}

footer .footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

footer a {
  color: var(--color-text-muted);
}

footer a:hover {
  color: var(--color-primary);
}

.faq-list {
  list-style: none;
  margin: 2rem 0;
}

.faq-list li {
  margin-bottom: 2rem;
}

.faq-question {
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.faq-answer {
  color: var(--color-text);
  line-height: 1.6;
}

@media (min-width: 768px) {
  header .header-inner {
    gap: 2rem;
  }
  
  nav ul {
    gap: 2rem;
  }
}

@media (min-width: 1024px) {
  section {
    padding: 3rem;
  }
}

@media print {
  body {
    background-color: white;
    color: black;
  }
  
  header, footer, nav, .breadcrumbs {
    display: none;
  }
  
  main {
    max-width: 100%;
    padding: 0;
  }
  
  section {
    border: none;
    box-shadow: none;
    page-break-inside: avoid;
  }
  
  a {
    text-decoration: underline;
    color: black;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.875rem;
  }
  
  table {
    page-break-inside: avoid;
  }
  
  thead {
    background-color: #f0f0f0;
    color: black;
  }
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}