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

:root {
  --color-primary: #881337;
  --color-secondary: #4c0519;
  --color-accent: #fda4af;
  --color-bg: #fffbfb;
  --color-surface: #fef2f4;
  --color-text: #3b0712;
  --color-text-muted: #8b6b73;
  --color-border: #e8cdd2;
  --font-main: 'Courier New', 'Lucida Console', Monaco, monospace;
  --max-width: 1100px;
  --radius: 0;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --border-width: 2px;
  --transition-speed: 0.2s;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: bold;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-secondary);
  letter-spacing: -0.5px;
}

h1 {
  font-size: 2.5rem;
  border-bottom: var(--border-width) solid var(--color-primary);
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2rem;
  position: relative;
  padding-left: var(--spacing-md);
}

h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background-color: var(--color-primary);
}

h3 {
  font-size: 1.5rem;
  color: var(--color-primary);
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

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

a:focus-visible {
  outline: var(--border-width) solid var(--color-primary);
  outline-offset: 2px;
}

strong {
  font-weight: bold;
  color: var(--color-secondary);
}

em {
  font-style: italic;
  color: var(--color-text-muted);
}

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

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

::selection {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

.site-header {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  border-bottom: var(--border-width) solid var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 0 var(--color-primary);
}

.site-header .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  align-items: center;
}

.site-header h1 {
  font-size: 1.75rem;
  margin: 0;
  padding: 0;
  border: none;
  color: var(--color-bg);
  text-align: center;
}

.site-nav {
  background-color: var(--color-primary);
  border-bottom: var(--border-width) solid var(--color-border);
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  justify-content: center;
}

.site-nav li {
  flex: 1 1 auto;
  min-width: 120px;
}

.site-nav a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-bg);
  border: none;
  border-right: 1px solid var(--color-secondary);
  background-color: var(--color-primary);
  text-align: center;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.site-nav li:last-child a {
  border-right: none;
}

.site-nav a:hover {
  background-color: var(--color-secondary);
  color: var(--color-accent);
  border-bottom: none;
}

.site-nav a:focus-visible {
  outline: var(--border-width) solid var(--color-accent);
  outline-offset: -2px;
}

.site-main {
  flex: 1;
  padding: var(--spacing-xl) 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.breadcrumbs a {
  color: var(--color-text-muted);
  border: none;
}

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

.breadcrumbs::before {
  content: '>';
  color: var(--color-text-muted);
  margin-right: var(--spacing-xs);
}

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

.breadcrumbs span::before {
  content: '/';
  margin: 0 var(--spacing-xs);
  color: var(--color-border);
}

.breadcrumbs span:first-child::before {
  content: none;
}

.card {
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  transition: box-shadow var(--transition-speed) ease, border-color var(--transition-speed) ease;
  position: relative;
}

.card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 20px;
  height: 20px;
  background-color: var(--color-primary);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.card:hover {
  box-shadow: 4px 4px 0 var(--color-primary);
  border-color: var(--color-primary);
}

.card h2, .card h3 {
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: var(--spacing-lg) 0;
  border: var(--border-width) solid var(--color-border);
  background-color: var(--color-surface);
}

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

table th {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  font-weight: bold;
  border-bottom: var(--border-width) solid var(--color-secondary);
  border-right: 1px solid var(--color-secondary);
}

table th:last-child {
  border-right: none;
}

table td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
}

table td:last-child {
  border-right: none;
}

table tbody tr {
  transition: background-color var(--transition-speed) ease;
}

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

table tbody tr:hover {
  background-color: var(--color-accent);
  color: var(--color-secondary);
}

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

details {
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  margin-bottom: var(--spacing-md);
  transition: border-color var(--transition-speed) ease;
}

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

details[open] {
  border-color: var(--color-primary);
}

details[open] summary {
  border-bottom: var(--border-width) solid var(--color-border);
  background-color: var(--color-primary);
  color: var(--color-bg);
}

summary {
  padding: var(--spacing-md);
  cursor: pointer;
  font-weight: bold;
  list-style: none;
  background-color: var(--color-bg);
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  position: relative;
  padding-left: var(--spacing-xl);
}

summary::before {
  content: '■';
  position: absolute;
  left: var(--spacing-md);
  transition: transform var(--transition-speed) ease;
  color: var(--color-primary);
}

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

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

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

details div {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  border-top: var(--border-width) solid var(--color-primary);
  margin-top: var(--spacing-xl);
  padding: var(--spacing-xl) 0;
}

.site-footer .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.site-footer a {
  color: var(--color-accent);
  border-bottom-color: transparent;
}

.site-footer a:hover {
  color: var(--color-bg);
  border-bottom-color: var(--color-bg);
}

.site-footer h3 {
  color: var(--color-accent);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-primary);
  padding-bottom: var(--spacing-xs);
}

.site-footer ul {
  list-style: none;
}

.site-footer li {
  margin-bottom: var(--spacing-xs);
  padding-left: var(--spacing-md);
  position: relative;
}

.site-footer li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

@media (min-width: 768px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  .site-header .container {
    grid-template-columns: auto 1fr;
    gap: var(--spacing-lg);
  }

  .site-header h1 {
    font-size: 2rem;
    text-align: left;
  }

  .site-nav ul {
    justify-content: flex-start;
  }

  .site-nav li {
    flex: 0 1 auto;
  }

  .site-main {
    padding: var(--spacing-xl) 0;
  }

  .container {
    padding: 0 var(--spacing-lg);
  }

  .site-footer .container {
    grid-template-columns: repeat(2, 1fr);
  }

  .card {
    padding: var(--spacing-xl);
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3.5rem;
  }

  .site-header .container {
    grid-template-columns: 1fr auto;
  }

  .site-nav ul {
    justify-content: flex-end;
  }

  .site-footer .container {
    grid-template-columns: repeat(3, 1fr);
  }

  .site-main {
    padding: 4rem 0;
  }

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

  table th,
  table td {
    padding: var(--spacing-md) var(--spacing-lg);
  }
}

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

@media print {
  .site-nav,
  .breadcrumbs {
    display: none;
  }

  .site-header {
    position: static;
    border: none;
    box-shadow: none;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  .site-main {
    padding: 0;
  }

  .card {
    border: 1px solid var(--color-border);
    box-shadow: none;
    page-break-inside: avoid;
  }

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

  details {
    border: 1px solid var(--color-border);
  }

  summary {
    background-color: var(--color-surface);
  }

  details[open] summary {
    background-color: var(--color-surface);
    color: var(--color-text);
  }
}
```