* {
  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-unit: 8px;
  --grid-gap: 24px;
}

body {
  font-family: var(--font-main);
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  font-weight: 400;
  letter-spacing: -0.01em;
}

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

h1 {
  font-size: 3rem;
  text-transform: uppercase;
  letter-spacing: -0.03em;
  border-bottom: 4px solid var(--color-primary);
  padding-bottom: calc(var(--spacing-unit) * 2);
  margin-bottom: calc(var(--spacing-unit) * 4);
}

h2 {
  font-size: 2.25rem;
  position: relative;
  padding-left: calc(var(--spacing-unit) * 2);
  border-left: 6px solid var(--color-primary);
}

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

h4 {
  font-size: 1.5rem;
  color: var(--color-primary);
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

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 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
  font-weight: 500;
}

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

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

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

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

blockquote {
  margin: calc(var(--spacing-unit) * 4) 0;
  padding: calc(var(--spacing-unit) * 3);
  border-left: 8px solid var(--color-primary);
  background-color: var(--color-surface);
  font-size: 1.125rem;
  line-height: 1.7;
  position: relative;
}

blockquote::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-border);
}

blockquote::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-border);
}

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

.site-header {
  background-color: var(--color-surface);
  border-bottom: 3px solid var(--color-border);
  padding: calc(var(--spacing-unit) * 3) 0;
  position: relative;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--color-primary);
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 calc(var(--spacing-unit) * 3);
  gap: var(--grid-gap);
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: calc(var(--spacing-unit) * 4);
  flex-wrap: wrap;
}

.site-nav a {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.9rem;
  font-weight: 600;
  border-bottom: 3px solid transparent;
  padding-bottom: calc(var(--spacing-unit) * 0.5);
}

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

.site-main {
  min-height: 60vh;
  padding: calc(var(--spacing-unit) * 6) 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 calc(var(--spacing-unit) * 3);
}

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-accent);
  padding: calc(var(--spacing-unit) * 6) 0 calc(var(--spacing-unit) * 4);
  margin-top: calc(var(--spacing-unit) * 8);
  border-top: 6px solid var(--color-primary);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 0;
  right: 0;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-primary) 0,
    var(--color-primary) 20px,
    transparent 20px,
    transparent 40px
  );
}

.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);
}

.breadcrumbs {
  display: flex;
  gap: calc(var(--spacing-unit) * 2);
  margin-bottom: calc(var(--spacing-unit) * 4);
  padding: calc(var(--spacing-unit) * 2);
  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);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.85rem;
}

.breadcrumbs a::after {
  content: '›';
  margin-left: calc(var(--spacing-unit) * 2);
  color: var(--color-border);
  font-weight: 700;
}

.breadcrumbs a:last-child::after {
  display: none;
}

.card {
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  padding: calc(var(--spacing-unit) * 4);
  margin-bottom: calc(var(--spacing-unit) * 3);
  position: relative;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background-color: var(--color-primary);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: calc(var(--spacing-unit) * 4) 0;
  background-color: var(--color-bg);
  border: 3px solid var(--color-border);
}

table thead {
  background-color: var(--color-secondary);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.9rem;
}

table th {
  padding: calc(var(--spacing-unit) * 2);
  text-align: left;
  font-weight: 700;
  border-bottom: 3px solid var(--color-primary);
}

table td {
  padding: calc(var(--spacing-unit) * 2);
  border-bottom: 2px solid var(--color-border);
}

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

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

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

details {
  margin: calc(var(--spacing-unit) * 3) 0;
  border: 3px solid var(--color-border);
  background-color: var(--color-surface);
}

summary {
  padding: calc(var(--spacing-unit) * 3);
  cursor: pointer;
  font-weight: 700;
  color: var(--color-secondary);
  background-color: var(--color-surface);
  border-bottom: 2px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: relative;
  padding-left: calc(var(--spacing-unit) * 5);
}

summary::before {
  content: '■';
  position: absolute;
  left: calc(var(--spacing-unit) * 2);
  transition: transform 0.2s ease;
  color: var(--color-primary);
}

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

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

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

details > *:not(summary) {
  padding: calc(var(--spacing-unit) * 3);
  border-top: 2px solid var(--color-border);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
  margin: calc(var(--spacing-unit) * 4) 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
  margin: calc(var(--spacing-unit) * 4) 0;
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
  margin: calc(var(--spacing-unit) * 4) 0;
}

.flex-row {
  display: flex;
  gap: var(--grid-gap);
  flex-wrap: wrap;
  align-items: center;
}

.flex-column {
  display: flex;
  flex-direction: column;
  gap: var(--grid-gap);
}

.flex-space-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--grid-gap);
}

hr {
  border: 0;
  height: 3px;
  background-color: var(--color-border);
  margin: calc(var(--spacing-unit) * 6) 0;
  position: relative;
}

hr::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

button {
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  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;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

button:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: 4px 4px 0 var(--color-border);
}

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

input, 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 0.2s ease, box-shadow 0.2s ease;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: inset 0 0 0 2px var(--color-primary);
}

label {
  display: block;
  font-weight: 700;
  margin-bottom: calc(var(--spacing-unit));
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.9rem;
  color: var(--color-secondary);
}

code {
  font-family: 'Courier New', monospace;
  background-color: var(--color-surface);
  padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit));
  border: 2px solid var(--color-border);
  font-size: 0.9em;
  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) * 4) 0;
}

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

ul, ol {
  margin-left: calc(var(--spacing-unit) * 4);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

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

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

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

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

figure {
  margin: calc(var(--spacing-unit) * 4) 0;
}

figcaption {
  padding: calc(var(--spacing-unit) * 2);
  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;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

  h2 {
    font-size: 2.75rem;
  }

  h3 {
    font-size: 2rem;
  }

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

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-nav {
    flex-wrap: nowrap;
  }

  .site-nav ul {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 4.5rem;
  }

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

  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }

  .card:hover {
    box-shadow: 12px 12px 0 var(--color-border);
  }
}

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

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

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

  .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;
  }
}