* {
  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: 'Verdana', 'Geneva', 'Tahoma', sans-serif;
  --max-width: 1100px;
  --radius: 0;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(circle, var(--color-border) 1px, transparent 1px);
  background-size: 20px 20px;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: bold;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

h1 {
  font-size: 2.5rem;
  border: 6px solid var(--color-text);
  padding: 1.5rem;
  background-color: var(--color-primary);
  color: var(--color-bg);
  box-shadow: 8px 8px 0 var(--color-text);
  margin-bottom: 2rem;
}

h2 {
  font-size: 2rem;
  border-bottom: 5px dashed var(--color-primary);
  padding-bottom: 0.75rem;
  margin-top: 2rem;
}

h3 {
  font-size: 1.5rem;
  border-left: 8px dotted var(--color-secondary);
  padding-left: 1rem;
  margin-top: 1.5rem;
}

h4 {
  font-size: 1.25rem;
  border: 3px double var(--color-border);
  padding: 0.5rem 1rem;
  background-color: var(--color-surface);
}

h5 {
  font-size: 1.1rem;
  text-decoration: underline;
  text-decoration-style: wavy;
  text-decoration-color: var(--color-primary);
}

h6 {
  font-size: 1rem;
  color: var(--color-text-muted);
  border-bottom: 2px dotted var(--color-border);
  display: inline-block;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  font-weight: bold;
}

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

a:focus-visible {
  outline: 4px dashed var(--color-primary);
  outline-offset: 4px;
  background-color: var(--color-accent);
}

strong {
  font-weight: bold;
  color: var(--color-text);
  background-color: var(--color-accent);
  padding: 0 4px;
  border: 2px solid var(--color-primary);
}

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

blockquote {
  border-left: 8px solid var(--color-primary);
  background-color: var(--color-surface);
  padding: 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  position: relative;
  border-top: 3px dotted var(--color-border);
  border-bottom: 3px dotted var(--color-border);
  box-shadow: 6px 6px 0 var(--color-accent);
}

blockquote::before {
  content: '"';
  font-size: 4rem;
  color: var(--color-primary);
  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: 8px solid var(--color-text);
  padding: 1.5rem 1rem;
  box-shadow: 0 8px 0 var(--color-primary);
  position: relative;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  right: 0;
  height: 4px;
  background-image: repeating-linear-gradient(90deg, var(--color-accent) 0, var(--color-accent) 10px, transparent 10px, transparent 20px);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  list-style: none;
  margin-top: 1rem;
}

.site-nav li {
  flex: 1 1 auto;
  min-width: 120px;
}

.site-nav a {
  display: block;
  padding: 1rem;
  background-color: var(--color-surface);
  border: 4px solid var(--color-text);
  text-align: center;
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 1px;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  border-bottom: 4px solid var(--color-text);
}

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

.site-nav a:focus-visible {
  outline: 4px dashed var(--color-secondary);
  outline-offset: -8px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
  width: 100%;
}

.site-main {
  padding: 3rem 0;
  background-color: var(--color-bg);
}

.breadcrumbs {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding: 1rem;
  background-color: var(--color-surface);
  border: 3px dashed var(--color-border);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  font-size: 0.9rem;
}

.breadcrumbs li::after {
  content: '▶';
  margin-left: 0.5rem;
  color: var(--color-primary);
  font-size: 0.7rem;
}

.breadcrumbs li:last-child::after {
  content: '';
}

.breadcrumbs a {
  padding: 0.25rem 0.5rem;
  border: 2px solid var(--color-border);
  background-color: var(--color-bg);
}

.card {
  background-color: var(--color-surface);
  border: 5px solid var(--color-text);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 10px 10px 0 var(--color-border);
  position: relative;
  transition: box-shadow 0.2s ease;
}

.card::before {
  content: '';
  position: absolute;
  top: 10px;
  left: 10px;
  right: 10px;
  bottom: 10px;
  border: 2px dotted var(--color-accent);
  pointer-events: none;
}

.card:hover {
  box-shadow: 15px 15px 0 var(--color-primary);
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 2rem 0;
  border: 4px solid var(--color-text);
  background-color: var(--color-bg);
}

table th {
  background-color: var(--color-primary);
  color: var(--color-bg);
  padding: 1rem;
  text-align: left;
  font-weight: bold;
  text-transform: uppercase;
  border: 3px solid var(--color-text);
  letter-spacing: 0.5px;
}

table td {
  padding: 1rem;
  border: 2px dotted var(--color-border);
  transition: background-color 0.2s ease;
}

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

table tbody tr:nth-child(even) {
  background-color: var(--color-bg);
  background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, var(--color-surface) 10px, var(--color-surface) 11px);
}

table tbody tr:hover {
  background-color: var(--color-accent);
  outline: 3px solid var(--color-primary);
  outline-offset: -3px;
}

details {
  border: 4px solid var(--color-text);
  margin-bottom: 1rem;
  background-color: var(--color-surface);
  box-shadow: 6px 6px 0 var(--color-border);
}

summary {
  padding: 1.5rem;
  cursor: pointer;
  font-weight: bold;
  background-color: var(--color-bg);
  border-bottom: 3px dashed var(--color-border);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease, color 0.2s ease;
  text-transform: uppercase;
}

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

summary::after {
  content: '▼';
  font-size: 0.8rem;
  transition: transform 0.2s ease;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  padding: 0.25rem 0.5rem;
}

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

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

summary:focus-visible {
  outline: 4px dashed var(--color-primary);
  outline-offset: -8px;
}

details > *:not(summary) {
  padding: 1.5rem;
  border-top: 3px dotted var(--color-primary);
}

.site-footer {
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: 3rem 1rem;
  border-top: 8px solid var(--color-primary);
  margin-top: 4rem;
  background-image: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(191, 219, 254, 0.1) 2px, rgba(191, 219, 254, 0.1) 4px);
}

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

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

.site-footer p {
  text-align: center;
  border: 3px dotted var(--color-primary);
  padding: 1rem;
  background-color: rgba(37, 99, 235, 0.2);
}

button, input[type="submit"], input[type="button"] {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: 1rem 2rem;
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 4px solid var(--color-text);
  cursor: pointer;
  text-transform: uppercase;
  font-weight: bold;
  letter-spacing: 1px;
  box-shadow: 6px 6px 0 var(--color-text);
  transition: background-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

button:hover, input[type="submit"]:hover, input[type="button"]:hover {
  background-color: var(--color-secondary);
  box-shadow: 8px 8px 0 var(--color-text);
  transform: translate(-2px, -2px);
}

button:focus-visible, input[type="submit"]:focus-visible, input[type="button"]:focus-visible {
  outline: 4px dashed var(--color-accent);
  outline-offset: 4px;
}

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

input[type="text"], input[type="email"], input[type="search"], input[type="url"], textarea, select {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: 0.75rem;
  border: 4px solid var(--color-text);
  background-color: var(--color-surface);
  color: var(--color-text);
  width: 100%;
  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: 4px 4px 0 var(--color-accent);
}

label {
  display: block;
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: var(--color-text);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

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

  h2 {
    font-size: 2.25rem;
  }

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

  .site-nav li {
    flex: 1;
  }

  .card {
    padding: 2.5rem;
  }

  table th, table td {
    padding: 1.25rem;
  }

  .site-header {
    padding: 2rem 1rem;
  }

  .site-main {
    padding: 4rem 0;
  }

  body {
    font-size: 18px;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3.5rem;
    padding: 2rem;
  }

  .site-nav a {
    font-size: 1rem;
    padding: 1.25rem;
  }

  .card {
    display: grid;
    gap: 2rem;
  }

  .site-footer {
    padding: 4rem 1rem;
  }

  table {
    font-size: 1rem;
  }
}

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

  summary::after {
    transition: none;
  }

  .site-nav a:hover {
    transform: none;
  }

  button:hover, input[type="submit"]:hover, input[type="button"]:hover {
    transform: none;
  }
}

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

  .site-header {
    border-bottom: 2px solid var(--color-text);
    box-shadow: none;
  }

  .site-main {
    max-width: 100%;
    padding: 1rem 0;
  }

  .card {
    box-shadow: none;
    border: 2px solid var(--color-text);
    page-break-inside: avoid;
  }

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

  body {
    background: white;
    background-image: none;
  }

  h1 {
    box-shadow: none;
    page-break-after: avoid;
  }

  table {
    page-break-inside: avoid;
  }
}