:root {
  --color-primary: #1E2A3A;
  --color-secondary: #2F6F8F;
  --color-accent: #D64B3A;
  --color-background: #F6F4EF;
  --color-surface: #FFFFFF;
  --color-text: #12161C;
  --color-text-muted: #4F5B66;
  --color-border: #D7D2C8;
  
  --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(18, 22, 28, 0.08);
  
  --baseline: 1.5rem;
  --grid-gap: 1.5rem;
}

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

*:focus {
  outline: none;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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-primary);
  text-decoration-color: var(--color-accent);
}

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

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

h1 {
  font-size: 2rem;
  margin-bottom: calc(var(--baseline) * 1.5);
}

h2 {
  font-size: 1.5rem;
  margin-top: calc(var(--baseline) * 2);
}

h3 {
  font-size: 1.25rem;
  margin-top: var(--baseline);
}

p, ul, ol, dl, table, blockquote, aside, details {
  margin-bottom: var(--baseline);
}

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

li {
  margin-bottom: 0.5rem;
}

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

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

header .header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

header .site-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

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

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

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

header nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--color-text);
  transition: color 0.2s ease;
}

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

main {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1rem;
}

article, section {
  margin-bottom: calc(var(--baseline) * 2);
}

footer {
  background-color: var(--color-primary);
  color: var(--color-background);
  padding: 2rem 1rem;
  margin-top: auto;
}

footer .footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 0.875rem;
}

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

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

nav[aria-label="Breadcrumb"] {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  margin-bottom: calc(var(--baseline) * 1.5);
  padding: 0.5rem 0;
  color: var(--color-text-muted);
}

nav[aria-label="Breadcrumb"] ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

nav[aria-label="Breadcrumb"] li {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

nav[aria-label="Breadcrumb"] li:not(:last-child)::after {
  content: "›";
  color: var(--color-border);
  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-secondary);
  text-decoration: underline;
}

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

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

caption {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  text-align: left;
  padding: 0.75rem 1rem;
  background-color: var(--color-primary);
  color: var(--color-background);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

thead {
  background-color: var(--color-background);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

th {
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-primary);
}

td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

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

tbody tr:hover {
  background-color: rgba(47, 111, 143, 0.05);
  transition: background-color 0.2s ease;
}

blockquote {
  position: relative;
  padding: 1rem 1rem 1rem 1.5rem;
  margin-left: 0;
  margin-right: 0;
  background-color: rgba(47, 111, 143, 0.03);
  border-left: 4px solid var(--color-secondary);
  font-style: italic;
  color: var(--color-text);
}

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

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

aside h2, aside h3, aside h4 {
  margin-top: 0;
}

dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

dt {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

dd {
  margin-left: 0;
  padding-left: 1rem;
  border-left: 2px solid var(--color-border);
}

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

summary {
  font-weight: 600;
  padding: 1rem 1.5rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  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: 1.25rem;
  font-weight: 700;
  color: var(--color-secondary);
  transition: transform 0.3s ease, color 0.2s ease;
  flex-shrink: 0;
}

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

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

summary:hover::before {
  color: var(--color-accent);
}

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

details > *:not(summary) {
  padding: 0 1.5rem 1rem 1.5rem;
}

details > *:not(summary):last-child {
  padding-bottom: 1.5rem;
}

@media (min-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.375rem;
  }
  
  header .header-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  main {
    padding: 3rem 2rem;
  }
  
  footer .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  dl {
    grid-template-columns: auto 1fr;
    gap: 0.5rem 1.5rem;
  }
  
  dd {
    padding-left: 0;
    border-left: none;
  }
  
  table {
    font-size: 1rem;
  }
  
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
  
  th {
    background-color: var(--color-background);
  }
}

@media (min-width: 1024px) {
  main {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--grid-gap);
    padding: 4rem 2rem;
  }
  
  main > * {
    grid-column: 1 / -1;
  }
  
  article {
    grid-column: 2 / 12;
  }
  
  aside {
    grid-column: 3 / 11;
  }
  
  h1 {
    font-size: 3rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }
}

@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;
  }
}

@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) ")";
    font-size: 0.875rem;
  }
  
  thead {
    display: table-header-group;
  }
  
  tr,
  img {
    page-break-inside: avoid;
  }
  
  h1, h2, h3 {
    page-break-after: avoid;
  }
  
  header nav,
  footer,
  details summary::before {
    display: none;
  }
  
  details[open] summary {
    border-bottom: none;
  }
  
  details > *:not(summary) {
    padding: 0;
  }
}