:root {
  --color-bg: #F6F3EE;
  --color-surface: #FFFFFF;
  --color-text: #111827;
  --color-muted: #4B5563;
  --color-border: #D6D3CC;
  --color-primary: #1F2A44;
  --color-secondary: #6B7280;
  --color-accent: #C46A2B;
  --color-background: #F6F3EE;
  --color-text-muted: #4B5563;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
}

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

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

@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-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 1fr;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  text-align: left;
  color: var(--color-primary);
}

h1 {
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 1.5rem;
  margin-top: var(--spacing-xl);
}

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

h4 {
  font-size: 1.125rem;
}

h5, h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--spacing-md);
}

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

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

ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-xs);
}

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

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

header .header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

header .site-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  margin: 0;
}

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

header nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
}

header nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

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

main {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-sm);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

section {
  margin-bottom: var(--spacing-xl);
}

article {
  background-color: var(--color-surface);
  padding: var(--spacing-lg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: var(--spacing-lg);
}

aside {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  border-radius: var(--radius);
}

blockquote {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-primary);
  padding: var(--spacing-md) var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  font-style: italic;
  color: var(--color-muted);
  box-shadow: var(--shadow);
}

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

nav[aria-label="Breadcrumb"] {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-sm) 0;
}

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

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

nav[aria-label="Breadcrumb"] li::after {
  content: "/";
  margin-left: var(--spacing-xs);
  color: var(--color-muted);
}

nav[aria-label="Breadcrumb"] li:last-child::after {
  content: "";
}

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

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  font-size: 0.9375rem;
}

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

caption {
  font-weight: 700;
  text-align: left;
  padding: var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-surface);
  font-size: 1.125rem;
}

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

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

th, td {
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: 600;
}

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

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

tbody tr:hover {
  background-color: rgba(31, 42, 68, 0.05);
}

tbody tr:last-child td {
  border-bottom: none;
}

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

details:hover {
  border-color: var(--color-accent);
}

details[open] {
  box-shadow: var(--shadow);
}

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

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

summary::before {
  content: "▶";
  display: inline-block;
  font-size: 0.75rem;
  transition: transform 0.2s ease;
  color: var(--color-accent);
  flex-shrink: 0;
}

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

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

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

details div {
  padding-top: var(--spacing-md);
  color: var(--color-text);
}

footer {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: var(--spacing-lg) var(--spacing-sm);
  text-align: center;
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-2xl);
}

footer p {
  margin: 0;
  font-size: 0.875rem;
}

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

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

button, .button {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

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

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

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

code, pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

code {
  background-color: var(--color-bg);
  padding: 0.125rem 0.25rem;
  border-radius: 3px;
  color: var(--color-primary);
}

pre {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: var(--spacing-md);
  border-radius: var(--radius);
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

pre code {
  background-color: transparent;
  padding: 0;
  color: inherit;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-xl) 0;
}

@media (min-width: 768px) {
  html {
    font-size: 106.25%;
  }

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  header .header-container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  header nav {
    gap: var(--spacing-lg);
  }

  main {
    padding: var(--spacing-xl) var(--spacing-lg);
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  article {
    padding: var(--spacing-xl);
  }

  aside {
    padding: var(--spacing-lg);
  }

  blockquote {
    padding: var(--spacing-lg) var(--spacing-xl);
  }

  table {
    font-size: 1rem;
  }

  .table-wrapper {
    overflow-x: visible;
  }

  thead th {
    position: sticky;
  }
}

@media (min-width: 1024px) {
  html {
    font-size: 112.5%;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  main {
    padding: var(--spacing-2xl) var(--spacing-xl);
  }

  main.with-sidebar {
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-2xl);
  }

  section {
    margin-bottom: var(--spacing-2xl);
  }
}

@media print {
  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a, a:visited {
    text-decoration: underline;
  }

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

  abbr[title]::after {
    content: " (" attr(title) ")";
  }

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

  main {
    max-width: 100%;
    padding: 0;
  }

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

  img, table, figure {
    page-break-inside: avoid;
  }

  p, h2, h3 {
    orphans: 3;
    widows: 3;
  }

  thead {
    display: table-header-group;
  }

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

*:focus {
  outline: none;
}

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

::selection {
  background-color: var(--color-accent);
  color: var(--color-surface);
}

::-moz-selection {
  background-color: var(--color-accent);
  color: var(--color-surface);
}