* {
  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: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1100px;
  --radius: 8px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background-image: radial-gradient(circle, var(--color-border) 1px, transparent 1px);
  background-size: 20px 20px;
  background-attachment: fixed;
}

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

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  border-bottom: 3px dotted var(--color-primary);
  padding-bottom: var(--spacing-sm);
}

h2 {
  font-size: 2rem;
  margin-top: var(--spacing-lg);
  border-bottom: 2px dashed var(--color-border);
  padding-bottom: var(--spacing-xs);
}

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

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);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px dotted transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
  padding: 0 2px;
}

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

a:focus-visible {
  outline: 3px dotted var(--color-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

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

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

blockquote {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  background-color: var(--color-surface);
  border-left: 5px solid var(--color-primary);
  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: 3rem;
  color: var(--color-accent);
  position: absolute;
  top: 0;
  left: var(--spacing-sm);
  line-height: 1;
}

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

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

.site-header {
  background-color: var(--color-surface);
  border-bottom: 4px dotted var(--color-primary);
  padding: var(--spacing-md) var(--spacing-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 8px rgba(37, 99, 235, 0.1);
  background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, var(--color-accent) 10px, var(--color-accent) 11px);
}

.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-secondary);
  text-shadow: 2px 2px 0 var(--color-accent);
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  align-items: center;
}

.site-nav a {
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px dotted var(--color-primary);
  border-radius: var(--radius);
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  display: inline-block;
}

.site-nav a:hover {
  background-color: var(--color-primary);
  color: var(--color-bg);
  border-color: var(--color-secondary);
  box-shadow: 4px 4px 0 var(--color-accent);
  transform: translate(-2px, -2px);
}

.site-nav a:focus-visible {
  outline: 3px dotted var(--color-secondary);
  outline-offset: 4px;
}

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

.site-main {
  padding: var(--spacing-lg) 0;
  background-color: var(--color-bg);
}

.breadcrumbs {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm);
  background-color: var(--color-surface);
  border-radius: var(--radius);
  border: 2px dashed var(--color-border);
  flex-wrap: wrap;
  font-size: 0.875rem;
}

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

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

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

.breadcrumbs > *:not(:last-child)::after {
  content: '→';
  margin-left: var(--spacing-xs);
  color: var(--color-text-muted);
}

.card {
  background-color: var(--color-surface);
  border: 3px dotted var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  background-image: radial-gradient(circle, var(--color-accent) 0.5px, transparent 0.5px);
  background-size: 15px 15px;
}

.card:hover {
  box-shadow: 8px 8px 0 var(--color-accent);
  border-color: var(--color-primary);
  transform: translate(-4px, -4px);
}

.card h2 {
  margin-top: 0;
  color: var(--color-secondary);
}

.card h3 {
  margin-top: var(--spacing-sm);
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: var(--spacing-md) 0;
  border: 3px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--color-bg);
}

thead {
  background-color: var(--color-primary);
  color: var(--color-bg);
  background-image: repeating-linear-gradient(90deg, transparent, transparent 5px, rgba(255, 255, 255, 0.1) 5px, rgba(255, 255, 255, 0.1) 6px);
}

th {
  padding: var(--spacing-sm);
  text-align: left;
  font-weight: 700;
  border-bottom: 3px dotted var(--color-secondary);
}

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

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

tbody tr:nth-child(odd) {
  background-color: var(--color-surface);
  background-image: radial-gradient(circle, var(--color-border) 0.5px, transparent 0.5px);
  background-size: 12px 12px;
}

tbody tr:hover {
  background-color: var(--color-accent);
  background-image: none;
}

tbody tr:last-child td {
  border-bottom: none;
}

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

summary {
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 700;
  cursor: pointer;
  background-color: var(--color-accent);
  border-bottom: 2px dashed var(--color-border);
  transition: background-color 0.2s ease, color 0.2s ease;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  user-select: none;
}

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

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

summary::marker {
  content: '▸ ';
  color: var(--color-primary);
}

details[open] summary::marker {
  content: '▾ ';
}

details[open] summary {
  background-color: var(--color-primary);
  color: var(--color-bg);
  background-image: repeating-linear-gradient(45deg, transparent, transparent 8px, rgba(255, 255, 255, 0.1) 8px, rgba(255, 255, 255, 0.1) 9px);
}

details > *:not(summary) {
  padding: var(--spacing-md);
  background-image: radial-gradient(circle, var(--color-border) 0.5px, transparent 0.5px);
  background-size: 10px 10px;
}

.site-footer {
  background-color: var(--color-text);
  color: var(--color-surface);
  padding: var(--spacing-lg) var(--spacing-sm);
  border-top: 5px dotted var(--color-primary);
  margin-top: var(--spacing-xl);
  background-image: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(191, 219, 254, 0.05) 2px, rgba(191, 219, 254, 0.05) 4px);
}

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

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

.site-footer p {
  color: var(--color-text-muted);
}

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

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

code {
  background-color: var(--color-surface);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'Courier New', Courier, monospace;
  border: 1px dotted var(--color-border);
  color: var(--color-secondary);
  font-size: 0.9em;
}

pre {
  background-color: var(--color-surface);
  padding: var(--spacing-md);
  border-radius: var(--radius);
  border: 2px dashed var(--color-border);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
  background-image: radial-gradient(circle, var(--color-border) 0.5px, transparent 0.5px);
  background-size: 8px 8px;
}

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

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

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

button, input[type="submit"], input[type="button"] {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 2px dotted var(--color-secondary);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  font-weight: 600;
}

button:hover, input[type="submit"]:hover, input[type="button"]:hover {
  background-color: var(--color-secondary);
  box-shadow: 4px 4px 0 var(--color-accent);
}

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

input[type="text"], input[type="email"], input[type="search"], textarea, select {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
}

input[type="text"]:focus, input[type="email"]: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);
}

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

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

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

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

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

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

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

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

  table {
    font-size: 1rem;
  }

  .breadcrumbs {
    font-size: 1rem;
  }
}

@media (min-width: 1024px) {
  :root {
    --spacing-xs: 0.625rem;
    --spacing-sm: 1.25rem;
    --spacing-md: 2rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
  }

  h1 {
    font-size: 3.5rem;
  }

  h2 {
    font-size: 2.5rem;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  body {
    background: white;
    background-image: none;
  }

  .site-header {
    position: static;
    border-bottom: 2px solid black;
    box-shadow: none;
  }

  .site-nav {
    display: none;
  }

  .site-footer {
    border-top: 2px solid black;
    background: white;
    color: black;
  }

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

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

  .card {
    border: 1px solid black;
    box-shadow: none;
    page-break-inside: avoid;
  }

  table {
    border: 1px solid black;
  }

  thead {
    background: #eeeeee;
    color: black;
  }
}