:root {
  --color-primary: #2F3A8F;
  --color-secondary: #1F6F8B;
  --color-accent: #E07A5F;
  --color-background: #F6F4EF;
  --color-surface: #FFFFFF;
  --color-text: #121826;
  --color-text-muted: #4B5563;
  --color-border: #D6D3CC;
  
  --radius: 2px;
  --shadow: 0 1px 3px rgba(18, 24, 38, 0.08);
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  
  --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
  
  --measure: 70ch;
  --grid-gap: var(--space-lg);
}

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

*:focus {
  outline: none;
}

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

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

body {
  font-family: var(--font-system);
  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-weight: 600;
  line-height: 1.2;
  margin-bottom: 0.75em;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.5rem, 3vw + 0.75rem, 2.25rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw + 0.5rem, 1.75rem);
}

h4 {
  font-size: clamp(1.125rem, 1.5vw + 0.5rem, 1.5rem);
}

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

p {
  max-width: var(--measure);
}

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-thickness: 2px;
}

a:active {
  color: var(--color-accent);
}

ul, ol {
  padding-left: 1.5rem;
  max-width: var(--measure);
}

li {
  margin-bottom: 0.5rem;
}

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

body {
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 1fr;
  min-height: 100vh;
}

header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

header > div {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: flex-start;
}

header h1,
header .site-name {
  font-size: 1.25rem;
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.01em;
}

header h1 a,
header .site-name a {
  color: var(--color-text);
  text-decoration: none;
}

header h1 a:hover,
header .site-name a:hover {
  color: var(--color-primary);
}

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

nav li {
  margin: 0;
}

nav a {
  text-decoration: none;
  font-weight: 500;
  padding: 0.25rem 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-primary);
}

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

main {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-sm);
  width: 100%;
}

article,
section {
  margin-bottom: var(--space-2xl);
}

section > h2 {
  margin-top: var(--space-xl);
}

nav[aria-label="Breadcrumb"] {
  margin-bottom: var(--space-lg);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

nav[aria-label="Breadcrumb"] ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  align-items: center;
  font-size: 0.875rem;
}

nav[aria-label="Breadcrumb"] li {
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

nav[aria-label="Breadcrumb"] li:not(:last-child)::after {
  content: "›";
  color: var(--color-text-muted);
  font-weight: 400;
}

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

nav[aria-label="Breadcrumb"] a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

nav[aria-label="Breadcrumb"] [aria-current="page"] {
  color: var(--color-text);
  font-weight: 500;
}

blockquote {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-md);
  margin-left: 0;
  margin-right: 0;
  font-style: italic;
  max-width: var(--measure);
  box-shadow: var(--shadow);
}

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

blockquote cite {
  display: block;
  margin-top: var(--space-sm);
  font-style: normal;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

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

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

details[open] {
  box-shadow: 0 2px 8px rgba(18, 24, 38, 0.12);
}

summary {
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  transition: color 0.2s ease;
  padding: var(--space-xs) 0;
}

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

summary::before {
  content: "▸";
  color: var(--color-primary);
  font-size: 1.25rem;
  line-height: 1;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

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

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

details > *:not(summary) {
  margin-top: var(--space-md);
}

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

aside {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
  margin: var(--space-lg) 0;
  box-shadow: var(--shadow);
}

aside h2,
aside h3,
aside h4 {
  font-size: 1.125rem;
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 0.9375rem;
  margin: var(--space-lg) 0;
  box-shadow: var(--shadow);
}

caption {
  font-weight: 600;
  text-align: left;
  padding: var(--space-md);
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-primary);
  font-size: 1.125rem;
  caption-side: top;
}

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

th {
  font-weight: 600;
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 2px solid var(--color-border);
}

td {
  padding: var(--space-sm) var(--space-md);
  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:hover {
  background-color: rgba(47, 58, 143, 0.05);
}

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

footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) var(--space-sm);
  margin-top: var(--space-2xl);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

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

@media (min-width: 768px) {
  header > div {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  main {
    padding: var(--space-xl) var(--space-lg);
  }
  
  section {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
  }
  
  .two-column {
    grid-template-columns: repeat(2, 1fr);
  }
  
  nav ul {
    gap: var(--space-lg);
  }
  
  table {
    font-size: 1rem;
  }
}

@media (min-width: 1024px) {
  :root {
    --space-xs: 0.625rem;
    --space-sm: 1.25rem;
    --space-md: 2rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 5rem;
  }
  
  main {
    padding: var(--space-2xl) var(--space-xl);
  }
  
  .three-column {
    grid-template-columns: repeat(3, 1fr);
  }
  
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
  
  aside {
    max-width: 50%;
    float: right;
    margin-left: var(--space-lg);
    margin-bottom: var(--space-lg);
  }
}

@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;
  }
}

@media print {
  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.5;
  }
  
  h1 {
    font-size: 24pt;
  }
  
  h2 {
    font-size: 18pt;
  }
  
  h3 {
    font-size: 14pt;
  }
  
  a {
    text-decoration: underline;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.875em;
  }
  
  header,
  footer,
  nav,
  aside {
    display: none;
  }
  
  main {
    max-width: 100%;
    padding: 0;
  }
  
  details {
    border: 1px solid black;
  }
  
  details summary::before {
    content: "";
  }
  
  details[open] summary ~ * {
    display: block;
  }
  
  table {
    border: 1px solid black;
  }
  
  thead {
    display: table-header-group;
  }
  
  tr {
    page-break-inside: avoid;
  }
  
  img {
    max-width: 100% !important;
    page-break-inside: avoid;
  }
  
  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
  }
  
  p, blockquote {
    orphans: 3;
    widows: 3;
  }
}