:root {
  --color-primary: #2B2A6E;
  --color-secondary: #0F6B66;
  --color-accent: #D14B2A;
  --color-background: #F6F2EA;
  --color-surface: #FFFFFF;
  --color-text: #14121A;
  --color-text-muted: #4D4A57;
  --color-border: #D8D1C6;
  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  --font-serif: ui-serif, Georgia, Times, serif;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(20, 18, 26, 0.10);
}

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.75em;
  color: var(--color-primary);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 1em;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  margin-top: 1.5em;
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  margin-top: 1.25em;
}

h4 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
}

p {
  margin-bottom: 1em;
}

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

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

ul, ol {
  margin-bottom: 1em;
  padding-left: 1.5em;
}

li {
  margin-bottom: 0.5em;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

header {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  padding: 1.5rem 1rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
}

.site-name {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
  letter-spacing: -0.03em;
}

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

nav li {
  margin: 0;
}

nav a {
  font-weight: 500;
  text-decoration: none;
  padding: 0.5rem 0;
  display: inline-block;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

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

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

.breadcrumb {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.breadcrumb li {
  margin: 0;
  display: flex;
  align-items: center;
}

.breadcrumb li:not(:last-child)::after {
  content: "›";
  margin-left: 0.5rem;
  color: var(--color-border);
  font-weight: 700;
}

.breadcrumb a {
  color: var(--color-secondary);
  text-decoration: none;
}

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

main {
  padding: clamp(1rem, 3vw, 2rem);
  max-width: 1400px;
  margin: 0 auto;
}

.content-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

section {
  background-color: var(--color-surface);
  padding: clamp(1.5rem, 4vw, 3rem);
  margin-bottom: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

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

caption {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  text-align: left;
  padding: 1rem;
  background-color: var(--color-primary);
  color: var(--color-surface);
  caption-side: top;
}

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

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

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

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

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

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

tbody tr:hover {
  background-color: rgba(43, 42, 110, 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: 0 4px 12px rgba(20, 18, 26, 0.08);
}

details[open] {
  padding-bottom: 1.5rem;
}

summary {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
  transition: color 0.2s ease;
}

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

summary::before {
  content: "▸";
  display: inline-block;
  font-size: 1.25rem;
  color: var(--color-accent);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

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

summary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

details div {
  margin-top: 1rem;
  padding-left: 2rem;
  color: var(--color-text);
}

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);
  border-radius: 0 var(--radius) var(--radius) 0;
}

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

footer {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: 2rem 1rem;
  margin-top: 4rem;
  text-align: center;
  font-size: 0.875rem;
  border-top: 4px solid var(--color-accent);
}

footer a {
  color: var(--color-surface);
  text-decoration: underline;
}

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

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

.faq-list li {
  margin: 0;
}

button {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  background-color: var(--color-secondary);
  color: var(--color-surface);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

button:hover {
  background-color: var(--color-accent);
  transform: translateY(-1px);
}

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

button:active {
  transform: translateY(0);
}

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

  .site-name {
    margin-bottom: 1.25rem;
  }

  nav ul {
    gap: 2rem;
  }

  table {
    font-size: 1rem;
  }

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

  th, td {
    padding: 1rem 1.25rem;
  }
}

@media (min-width: 1024px) {
  .content-wrapper {
    grid-template-columns: 1fr 320px;
    gap: 3rem;
  }

  .has-sidebar {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 3rem;
  }

  aside {
    position: sticky;
    top: 2rem;
    align-self: start;
    background-color: var(--color-surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow);
  }

  aside h3 {
    font-size: 1.25rem;
    margin-top: 0;
  }

  nav ul {
    gap: 2.5rem;
  }
}

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

  html {
    scroll-behavior: auto;
  }

  summary::before {
    transition: none;
  }

  button {
    transform: none !important;
    transition: background-color 0.01ms;
  }
}

@media print {
  * {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a, a:visited {
    text-decoration: underline;
    color: #000 !important;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }

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

  body {
    background: white;
    padding: 0;
  }

  main {
    max-width: 100%;
  }

  section {
    page-break-inside: avoid;
    border: 1px solid #ccc;
    padding: 1rem;
    margin-bottom: 1rem;
  }

  h1, h2, h3 {
    page-break-after: avoid;
  }

  table {
    border-collapse: collapse;
  }

  thead {
    display: table-header-group;
  }

  tr, img {
    page-break-inside: avoid;
  }
}