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

:root {
  --color-primary: #a0522d;
  --color-secondary: #6b3410;
  --color-accent: #f4c89a;
  --color-bg: #fffdf8;
  --color-surface: #fdf5eb;
  --color-text: #3e1d08;
  --color-text-muted: #8d7560;
  --color-border: #ddd0be;
  --font-main: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --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;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-loose: 1.8;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

h2 {
  font-size: 2rem;
  margin-top: var(--spacing-lg);
  position: relative;
  padding-left: var(--spacing-sm);
}

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

h3 {
  font-size: 1.5rem;
  margin-top: var(--spacing-md);
}

h4 {
  font-size: 1.25rem;
  margin-top: var(--spacing-md);
}

h5 {
  font-size: 1.125rem;
  margin-top: var(--spacing-sm);
}

h6 {
  font-size: 1rem;
  margin-top: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

p {
  margin-bottom: var(--spacing-sm);
  max-width: 70ch;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s 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: 700;
  color: var(--color-secondary);
}

em {
  font-style: italic;
}

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

blockquote::before {
  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-accent);
  color: var(--color-secondary);
}

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

.site-header .container {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  min-height: 70px;
}

.site-header h1 {
  font-size: 1.5rem;
  margin: 0;
  padding: 0;
  border: none;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.site-header h1 a {
  border: none;
  color: var(--color-secondary);
}

.site-header h1 a:hover {
  color: var(--color-primary);
  border: none;
}

.site-nav {
  justify-self: end;
}

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

.site-nav li {
  margin: 0;
}

.site-nav a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  border: none;
  border-right: 1px solid var(--color-border);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav li:first-child a {
  border-left: 1px solid var(--color-border);
}

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

.site-nav a:focus-visible {
  outline: var(--border-width) solid var(--color-secondary);
  outline-offset: -2px;
  z-index: 1;
}

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

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

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

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

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

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

.card {
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  position: relative;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.card::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 0 20px 20px;
  border-color: transparent transparent var(--color-accent) transparent;
}

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

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

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

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

th {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  border-right: 1px solid var(--color-primary);
  border-bottom: var(--border-width) solid var(--color-primary);
}

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

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

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

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

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

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

details {
  margin: var(--spacing-md) 0;
  border: var(--border-width) solid var(--color-border);
  background-color: var(--color-surface);
}

summary {
  padding: var(--spacing-md);
  cursor: pointer;
  font-weight: 700;
  color: var(--color-secondary);
  user-select: none;
  list-style: none;
  position: relative;
  transition: background-color 0.2s ease;
  border-left: 4px solid transparent;
}

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

summary::before {
  content: '▸';
  display: inline-block;
  margin-right: var(--spacing-sm);
  transition: transform 0.2s ease;
  color: var(--color-primary);
  font-size: 1.2em;
}

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

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

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

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

details > *:not(summary) {
  padding: var(--spacing-md);
}

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-surface);
  border-top: 4px solid var(--color-primary);
  margin-top: auto;
}

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

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

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

.site-footer p {
  color: var(--color-surface);
  opacity: 0.9;
}

ul, ol {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-lg);
}

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

code {
  font-family: 'Courier New', Courier, monospace;
  background-color: var(--color-surface);
  padding: 2px 6px;
  border: 1px solid var(--color-border);
  font-size: 0.9em;
  color: var(--color-secondary);
}

pre {
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  padding: var(--spacing-md);
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

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

hr {
  border: none;
  height: var(--border-width);
  background-color: var(--color-border);
  margin: var(--spacing-xl) 0;
  position: relative;
}

hr::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  background-color: var(--color-primary);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

button, input[type="submit"], input[type="button"] {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: var(--border-width) solid var(--color-primary);
  cursor: pointer;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

button:hover, input[type="submit"]:hover, input[type="button"]:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: 3px 3px 0 0 var(--color-accent);
}

button:focus-visible, input[type="submit"]:focus-visible, input[type="button"]:focus-visible {
  outline: var(--border-width) solid var(--color-accent);
  outline-offset: 2px;
}

input[type="text"], input[type="email"], input[type="search"], input[type="url"], textarea, select {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: var(--spacing-sm);
  border: var(--border-width) solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  width: 100%;
  max-width: 500px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input[type="text"]:focus, input[type="email"]:focus, input[type="search"]:focus, input[type="url"]:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-accent);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--color-secondary);
}

@media (min-width: 768px) {
  :root {
    --spacing-xs: 0.75rem;
    --spacing-sm: 1.25rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .site-header .container {
    padding: var(--spacing-md);
  }

  .site-header h1 {
    font-size: 1.75rem;
  }

  .site-nav a {
    padding: var(--spacing-sm) var(--spacing-lg);
  }

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

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

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

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

  .site-nav ul {
    gap: var(--spacing-xs);
  }
}

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

  summary::before {
    transition: none;
  }
}

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

  .site-main {
    padding: 0;
  }

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

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

  .card {
    border: 1px solid var(--color-border);
    page-break-inside: avoid;
  }

  table {
    page-break-inside: avoid;
  }

  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
  }
}