*, *::before, *::after {
  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: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1100px;
  --radius: 0;
  --spacing-unit: 8px;
  --grid-gap: 24px;
  --transition-speed: 0.2s;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-secondary);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

h1 {
  font-size: 3rem;
  border-bottom: 4px solid var(--color-primary);
  padding-bottom: calc(var(--spacing-unit) * 2);
  margin-bottom: calc(var(--spacing-unit) * 3);
}

h2 {
  font-size: 2.25rem;
  position: relative;
  padding-left: calc(var(--spacing-unit) * 2);
}

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

h3 {
  font-size: 1.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

p {
  margin-bottom: calc(var(--spacing-unit) * 2);
  max-width: 70ch;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px 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: 2px solid var(--color-primary);
  outline-offset: 4px;
}

strong {
  font-weight: 700;
  color: var(--color-secondary);
}

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

blockquote {
  border-left: 6px solid var(--color-primary);
  background-color: var(--color-surface);
  padding: calc(var(--spacing-unit) * 3);
  margin: calc(var(--spacing-unit) * 3) 0;
  font-size: 1.125rem;
  font-style: italic;
  position: relative;
}

blockquote::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, transparent 50%, var(--color-accent) 50%);
  opacity: 0.3;
}

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

.site-header {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  border-bottom: 6px solid var(--color-primary);
  position: relative;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
}

.site-header .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
  align-items: center;
  padding: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 2);
}

.site-header h1 {
  font-size: 2rem;
  color: var(--color-bg);
  border: none;
  margin: 0;
  padding: 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.site-nav {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
}

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

.site-nav li {
  flex: 1 1 auto;
  border-right: 2px solid var(--color-border);
}

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

.site-nav a {
  display: block;
  padding: calc(var(--spacing-unit) * 2);
  color: var(--color-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
  border: none;
  text-align: center;
  background-color: transparent;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.site-nav a:hover {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

.site-nav a:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 3px var(--color-primary);
}

.site-main {
  flex: 1;
  width: 100%;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--spacing-unit) * 4) calc(var(--spacing-unit) * 2);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing-unit) * 2);
  list-style: none;
  margin-bottom: calc(var(--spacing-unit) * 3);
  padding: calc(var(--spacing-unit) * 2);
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  font-size: 0.875rem;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 2);
}

.breadcrumbs li:not(:last-child)::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 6px solid var(--color-text-muted);
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
}

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

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

.breadcrumbs li:last-child a {
  color: var(--color-secondary);
  font-weight: 600;
}

.card {
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  padding: calc(var(--spacing-unit) * 3);
  margin-bottom: calc(var(--spacing-unit) * 3);
  position: relative;
  transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 8px;
  height: 100%;
  background-color: var(--color-primary);
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: 8px 8px 0 var(--color-accent);
}

.card h3 {
  margin-top: 0;
  padding-left: calc(var(--spacing-unit) * 2);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: calc(var(--spacing-unit) * 3) 0;
  background-color: var(--color-bg);
  border: 3px solid var(--color-border);
  font-size: 0.9375rem;
}

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

thead th {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
}

th, td {
  text-align: left;
  padding: calc(var(--spacing-unit) * 2);
  border: 2px solid var(--color-border);
}

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

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

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

tbody td {
  color: var(--color-text);
}

details {
  border: 3px solid var(--color-border);
  background-color: var(--color-surface);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

summary {
  padding: calc(var(--spacing-unit) * 2);
  cursor: pointer;
  font-weight: 600;
  color: var(--color-secondary);
  background-color: var(--color-bg);
  border-bottom: 2px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  user-select: none;
}

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

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

summary::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 8px solid currentColor;
  transition: transform var(--transition-speed) ease;
}

details[open] summary::after {
  transform: rotate(180deg);
}

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

details > *:not(summary) {
  padding: calc(var(--spacing-unit) * 3);
  animation: slideDown var(--transition-speed) ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  border-top: 6px solid var(--color-primary);
  margin-top: calc(var(--spacing-unit) * 6);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
}

.site-footer .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
  padding: calc(var(--spacing-unit) * 4) calc(var(--spacing-unit) * 2);
}

.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 p {
  color: var(--color-bg);
  opacity: 0.9;
}

button, input[type="submit"], input[type="button"] {
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 3px solid var(--color-primary);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

button:hover, input[type="submit"]:hover, input[type="button"]:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: 6px 6px 0 var(--color-accent);
}

button:focus-visible, input[type="submit"]:focus-visible, input[type="button"]:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 4px;
}

input[type="text"], input[type="email"], input[type="url"], input[type="search"], textarea, select {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: calc(var(--spacing-unit) * 2);
  border: 3px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  width: 100%;
  transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

input[type="text"]:focus, input[type="email"]:focus, input[type="url"]:focus, input[type="search"]:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: inset 4px 0 0 var(--color-primary);
}

hr {
  border: none;
  height: 4px;
  background-color: var(--color-border);
  margin: calc(var(--spacing-unit) * 4) 0;
  position: relative;
}

hr::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100px;
  height: 4px;
  background-color: var(--color-primary);
}

code {
  font-family: 'Courier New', monospace;
  background-color: var(--color-surface);
  padding: calc(var(--spacing-unit) / 2) var(--spacing-unit);
  border: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-secondary);
}

pre {
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  border-left: 6px solid var(--color-primary);
  padding: calc(var(--spacing-unit) * 3);
  overflow-x: auto;
  margin: calc(var(--spacing-unit) * 3) 0;
}

pre code {
  background: none;
  border: none;
  padding: 0;
}

@media (min-width: 768px) {
  h1 {
    font-size: 4rem;
  }

  h2 {
    font-size: 2.75rem;
  }

  h3 {
    font-size: 2rem;
  }

  .site-header .container {
    grid-template-columns: auto 1fr;
    padding: calc(var(--spacing-unit) * 4) calc(var(--spacing-unit) * 3);
  }

  .site-nav ul {
    gap: 0;
  }

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

  .site-nav a {
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
  }

  .container {
    padding: calc(var(--spacing-unit) * 6) calc(var(--spacing-unit) * 3);
  }

  .site-footer .container {
    grid-template-columns: 2fr 1fr;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 5rem;
  }

  .site-header .container {
    padding: calc(var(--spacing-unit) * 5) calc(var(--spacing-unit) * 4);
  }

  .container {
    padding: calc(var(--spacing-unit) * 8) calc(var(--spacing-unit) * 4);
  }

  .site-nav a {
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
  }

  .site-footer .container {
    grid-template-columns: 3fr 1fr;
  }
}

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

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

  .site-header {
    border-bottom: 2px solid var(--color-text);
  }

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

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

  .card {
    border: 2px solid var(--color-text);
    box-shadow: none;
    page-break-inside: avoid;
  }

  table {
    page-break-inside: avoid;
  }
}