* {
  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: 'Trebuchet MS', 'Lucida Sans', 'Lucida Grande', sans-serif;
  --max-width: 1100px;
  --radius: 0;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  --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: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  border-bottom: 4px solid var(--color-primary);
  padding-bottom: var(--spacing-sm);
  display: inline-block;
}

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: 1.1rem;
  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);
}

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: 3px solid var(--color-primary);
  outline-offset: 3px;
}

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

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

blockquote {
  background-color: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

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

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

.site-header {
  background-color: var(--color-surface);
  border-bottom: 3px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 0 var(--color-primary);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

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

.site-nav {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.site-nav a {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px solid transparent;
  border-bottom: 2px solid transparent;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.site-nav a:hover {
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
}

.site-nav a:focus-visible {
  outline: 3px solid var(--color-secondary);
  outline-offset: 0;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  width: 100%;
}

.breadcrumbs {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm);
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

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

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

.breadcrumbs::before {
  content: '▶';
  color: var(--color-primary);
  margin-right: var(--spacing-xs);
}

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

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-accent);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  border-top: 6px solid var(--color-primary);
}

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

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

.card::after {
  content: '';
  position: absolute;
  bottom: -6px;
  right: -6px;
  width: 100%;
  height: 100%;
  border: 3px solid var(--color-border);
  z-index: -1;
}

.card:hover {
  box-shadow: 0 0 0 3px var(--color-primary);
  border-color: var(--color-primary);
}

.card h3 {
  margin-top: 0;
  color: var(--color-primary);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-md) 0;
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
}

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

table th {
  padding: var(--spacing-sm);
  text-align: left;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  border: 2px solid var(--color-secondary);
}

table td {
  padding: var(--spacing-sm);
  border: 2px solid var(--color-border);
}

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

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

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

details {
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-sm);
  transition: box-shadow var(--transition-speed) ease;
}

details[open] {
  box-shadow: 0 0 0 3px var(--color-primary);
}

details summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-primary);
  padding: var(--spacing-xs);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  transition: color var(--transition-speed) ease;
}

details summary:hover {
  color: var(--color-secondary);
}

details summary::after {
  content: '▼';
  font-size: 0.8rem;
  transition: transform var(--transition-speed) ease;
}

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

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

details > *:not(summary) {
  margin-top: var(--spacing-sm);
  padding-left: var(--spacing-sm);
  border-left: 3px solid var(--color-accent);
}

button, input[type="submit"], input[type="button"] {
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 3px solid var(--color-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 700;
  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;
  box-shadow: 4px 4px 0 var(--color-secondary);
}

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

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

button:active, input[type="submit"]:active, input[type="button"]:active {
  box-shadow: 2px 2px 0 var(--color-secondary);
  transform: translate(2px, 2px);
}

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

input[type="text"]:focus, input[type="email"]:focus, input[type="tel"]:focus, input[type="search"]:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-accent);
}

label {
  display: block;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  color: var(--color-secondary);
}

form > * {
  margin-bottom: var(--spacing-md);
}

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

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

ul li::marker {
  color: var(--color-primary);
}

ol li::marker {
  color: var(--color-primary);
  font-weight: 700;
}

hr {
  border: none;
  border-top: 3px solid var(--color-border);
  margin: var(--spacing-lg) 0;
  position: relative;
}

hr::after {
  content: '◆';
  position: absolute;
  top: -0.7rem;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-bg);
  padding: 0 var(--spacing-sm);
  color: var(--color-primary);
  font-size: 1.2rem;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 3px solid var(--color-border);
}

figure {
  margin: var(--spacing-md) 0;
}

figcaption {
  padding: var(--spacing-sm);
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  border-top: none;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-align: center;
}

code {
  background-color: var(--color-surface);
  color: var(--color-secondary);
  padding: 0.15em 0.4em;
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
  border: 2px solid var(--color-border);
}

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

pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-text);
}

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

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .site-header .container {
    flex-wrap: nowrap;
  }

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

  .card::after {
    bottom: -8px;
    right: -8px;
  }

  button, input[type="submit"], input[type="button"] {
    box-shadow: 5px 5px 0 var(--color-secondary);
  }

  button:hover, input[type="submit"]:hover, input[type="button"]:hover {
    box-shadow: 7px 7px 0 var(--color-border);
  }
}

@media (min-width: 1024px) {
  :root {
    --spacing-xs: 0.75rem;
    --spacing-sm: 1.25rem;
    --spacing-md: 2.5rem;
    --spacing-lg: 4rem;
    --spacing-xl: 5rem;
  }

  h1 {
    font-size: 3.5rem;
  }

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

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

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

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

@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;
  }
}

@media print {
  .site-header {
    position: static;
    box-shadow: none;
  }

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

  .site-main {
    padding: 0;
  }

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

  .site-footer {
    border-top: 2px solid var(--color-text);
    page-break-before: always;
  }

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

  .card::after {
    display: none;
  }

  button, input[type="submit"], input[type="button"] {
    box-shadow: none;
  }
}