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

:root {
  --color-primary: #2563eb;
  --color-secondary: #1d4ed8;
  --color-accent: #bfdbfe;
  --color-bg: #ffffff;
  --color-surface: #eff6ff;
  --color-text: #172554;
  --color-text-muted: #6080b0;
  --color-border: #c8daf0;
  --font-main: 'Courier New', 'Lucida Console', Monaco, monospace;
  --max-width: 1100px;
  --radius: 2px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

body {
  font-family: var(--font-main);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(circle, var(--color-border) 1px, transparent 1px);
  background-size: 20px 20px;
  background-attachment: fixed;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: bold;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  border-bottom: 3px dashed var(--color-primary);
  padding-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h2 {
  font-size: 2rem;
  margin-top: var(--spacing-lg);
  border-left: 5px dotted var(--color-primary);
  padding-left: var(--spacing-sm);
}

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

h3::before {
  content: '■ ';
  color: var(--color-primary);
}

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

h5 {
  font-size: 1.1rem;
  margin-top: var(--spacing-sm);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-decoration-color: var(--color-border);
}

h6 {
  font-size: 1rem;
  margin-top: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

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

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-style: dotted;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

a:hover {
  color: var(--color-secondary);
  background-color: var(--color-accent);
  text-decoration-style: solid;
}

a:focus-visible {
  outline: 2px dashed var(--color-primary);
  outline-offset: 3px;
  background-color: var(--color-accent);
}

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

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

blockquote {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  border-left: 5px dotted var(--color-primary);
  background-color: var(--color-surface);
  background-image: radial-gradient(circle, var(--color-accent) 1px, transparent 1px);
  background-size: 10px 10px;
  font-style: italic;
  position: relative;
}

blockquote::before {
  content: '"';
  font-size: 4rem;
  color: var(--color-accent);
  position: absolute;
  top: -10px;
  left: 10px;
  line-height: 1;
}

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

.site-header {
  background-color: var(--color-bg);
  border-bottom: 3px dashed var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.1);
}

.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;
  letter-spacing: 0.08em;
}

.site-header h1 a {
  color: var(--color-text);
  text-decoration: none;
  position: relative;
}

.site-header h1 a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 100%;
  height: 2px;
  background-image: repeating-linear-gradient(to right, var(--color-primary) 0, var(--color-primary) 5px, transparent 5px, transparent 10px);
}

.site-header h1 a:hover {
  background-color: transparent;
  color: var(--color-primary);
}

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

.site-nav a {
  color: var(--color-text);
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px dotted transparent;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

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

.site-nav a:focus-visible {
  outline: 2px dashed var(--color-primary);
  outline-offset: 2px;
}

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

.site-main {
  min-height: 70vh;
  padding: var(--spacing-xl) 0;
}

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

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

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

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

.card {
  background-color: var(--color-bg);
  border: 3px dotted var(--color-border);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background-image: repeating-linear-gradient(to right, var(--color-primary) 0, var(--color-primary) 10px, var(--color-secondary) 10px, var(--color-secondary) 20px);
}

.card:hover {
  box-shadow: 0 5px 20px rgba(37, 99, 235, 0.15);
  border-color: var(--color-primary);
}

.card h3 {
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-md) 0;
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
}

table thead {
  background-color: var(--color-surface);
  background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, var(--color-accent) 10px, var(--color-accent) 20px);
}

table th {
  padding: var(--spacing-sm);
  text-align: left;
  font-weight: bold;
  color: var(--color-text);
  border-bottom: 3px dashed var(--color-primary);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

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

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

table tbody tr:hover {
  background-color: var(--color-accent);
  transition: background-color 0.2s ease;
}

details {
  margin: var(--spacing-md) 0;
  border: 2px dotted var(--color-border);
  background-color: var(--color-surface);
  padding: var(--spacing-sm);
}

summary {
  cursor: pointer;
  font-weight: bold;
  padding: var(--spacing-sm);
  margin: calc(var(--spacing-sm) * -1);
  background-color: var(--color-bg);
  border-bottom: 2px dashed transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease;
  list-style: none;
  position: relative;
  padding-left: var(--spacing-lg);
}

summary::before {
  content: '▸';
  position: absolute;
  left: var(--spacing-sm);
  transition: transform 0.2s ease;
  color: var(--color-primary);
  font-size: 1.2rem;
}

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

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

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

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

details > *:not(summary) {
  padding: var(--spacing-sm);
  animation: slideDown 0.2s ease;
}

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

.site-footer {
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
  border-top: 5px dashed var(--color-primary);
  background-image: radial-gradient(circle, var(--color-secondary) 1px, transparent 1px);
  background-size: 15px 15px;
}

.site-footer a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-style: dotted;
}

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

.site-footer .container {
  background-color: transparent;
}

.site-footer p {
  text-align: center;
  color: var(--color-accent);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 2px dotted var(--color-border);
}

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

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

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

ol li::marker {
  color: var(--color-secondary);
  font-weight: bold;
}

code {
  font-family: var(--font-main);
  background-color: var(--color-surface);
  padding: 2px 6px;
  border: 1px dotted var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9em;
  color: var(--color-secondary);
}

pre {
  background-color: var(--color-surface);
  border: 2px dotted var(--color-border);
  padding: var(--spacing-md);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
}

pre code {
  background-color: transparent;
  border: none;
  padding: 0;
}

hr {
  border: none;
  border-top: 3px dashed var(--color-border);
  margin: var(--spacing-lg) 0;
  background-image: repeating-linear-gradient(to right, var(--color-primary) 0, var(--color-primary) 1px, transparent 1px, transparent 8px);
  height: 3px;
}

input, textarea, select {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: var(--spacing-sm);
  border: 2px dotted var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
  max-width: 500px;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-accent);
}

button {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 2px solid var(--color-primary);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: bold;
}

button:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: 0 3px 10px rgba(37, 99, 235, 0.3);
}

button:focus-visible {
  outline: 2px dashed var(--color-text);
  outline-offset: 3px;
}

button:active {
  transform: translateY(1px);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 3px dotted var(--color-border);
  padding: var(--spacing-xs);
  background-color: var(--color-bg);
}

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

figcaption {
  padding: var(--spacing-sm);
  background-color: var(--color-surface);
  border: 2px dotted var(--color-border);
  border-top: none;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-align: center;
  font-style: italic;
}

@media (min-width: 768px) {
  body {
    font-size: 16px;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

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

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

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

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

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

  h2 {
    font-size: 2.5rem;
  }

  .site-header h1 {
    font-size: 2.25rem;
  }

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

  table {
    font-size: 0.95rem;
  }
}

@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 {
  body {
    background: white;
    background-image: none;
    color: black;
  }

  .site-header {
    position: static;
    border-bottom: 2px solid black;
  }

  .site-nav {
    display: none;
  }

  .site-footer {
    border-top: 2px solid black;
    background: white;
    background-image: none;
    color: black;
  }

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

  a {
    text-decoration: underline;
    color: black;
  }

  .card {
    border: 1px solid black;
    break-inside: avoid;
  }

  table {
    border: 1px solid black;
  }

  table th, table td {
    border: 1px solid black;
  }
}