* {
  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;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

h1 {
  font-size: 2.5rem;
  border: 6px solid var(--color-text);
  padding: 1rem 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: 4px dashed var(--color-primary);
  padding-bottom: 0.5rem;
  margin-top: 2rem;
}

h3 {
  font-size: 1.5rem;
  border-left: 6px dotted var(--color-primary);
  padding-left: 1rem;
  margin-top: 1.5rem;
}

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

h5 {
  font-size: 1.1rem;
  margin-top: 1rem;
}

h6 {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
}

p {
  margin-bottom: 1rem;
}

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

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

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

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

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

blockquote {
  margin: 2rem 0;
  padding: 1.5rem;
  background-color: var(--color-surface);
  background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, var(--color-accent) 10px, var(--color-accent) 11px);
  border-left: 8px solid var(--color-primary);
  border-right: 4px dotted var(--color-border);
  border-top: 4px dotted var(--color-border);
  border-bottom: 4px dotted var(--color-border);
  font-style: italic;
  box-shadow: 6px 6px 0 var(--color-border);
}

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

.site-header {
  background-color: var(--color-bg);
  border-bottom: 6px solid var(--color-text);
  padding: 1.5rem 1rem;
  box-shadow: 0 6px 0 var(--color-primary);
  position: relative;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  right: 0;
  height: 6px;
  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;
}

.site-nav a {
  display: block;
  padding: 0.75rem 1.25rem;
  background-color: var(--color-surface);
  border: 4px solid var(--color-text);
  border-bottom: none;
  text-align: center;
  font-size: 0.95rem;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.site-nav a:hover {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  box-shadow: inset 0 0 0 3px var(--color-accent);
}

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  background-color: var(--color-bg);
  padding: 2rem;
  border: 5px dotted var(--color-border);
  box-shadow: 12px 12px 0 var(--color-surface), 12px 12px 0 5px var(--color-border);
}

.breadcrumbs {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding: 0.75rem 1rem;
  background-color: var(--color-surface);
  border: 3px dashed var(--color-border);
  font-size: 0.9rem;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
}

.breadcrumbs li:not(:last-child)::after {
  content: '//';
  margin-left: 0.5rem;
  color: var(--color-text-muted);
  font-weight: bold;
}

.breadcrumbs a {
  border-bottom-width: 2px;
  font-size: 0.9rem;
}

.site-footer {
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: 2rem 1rem;
  border-top: 8px solid var(--color-primary);
  margin-top: 3rem;
  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-primary);
}

.site-footer a:hover {
  background-color: var(--color-accent);
  color: var(--color-text);
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 2rem 0;
  border: 5px solid var(--color-text);
  background-color: var(--color-bg);
  box-shadow: 8px 8px 0 var(--color-border);
}

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

thead th {
  padding: 1rem;
  text-align: left;
  font-weight: bold;
  border-bottom: 4px solid var(--color-text);
  border-right: 3px dotted var(--color-secondary);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

thead th:last-child {
  border-right: none;
}

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-accent) 0.5px, transparent 0.5px);
  background-size: 8px 8px;
}

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

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

tbody td {
  padding: 0.875rem 1rem;
  border-bottom: 2px dashed var(--color-border);
  border-right: 2px dotted var(--color-border);
}

tbody td:last-child {
  border-right: none;
}

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

.card {
  background-color: var(--color-bg);
  border: 5px solid var(--color-text);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 10px 10px 0 var(--color-primary);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 10px;
  right: 10px;
  width: 20px;
  height: 20px;
  border: 3px dotted var(--color-border);
}

.card:hover {
  box-shadow: 14px 14px 0 var(--color-secondary);
  transform: translate(-2px, -2px);
}

.card h3 {
  margin-top: 0;
  border-left-width: 8px;
}

details {
  margin: 1.5rem 0;
  border: 4px solid var(--color-border);
  background-color: var(--color-surface);
}

summary {
  padding: 1rem 1.5rem;
  cursor: pointer;
  font-weight: bold;
  background-color: var(--color-primary);
  color: var(--color-bg);
  border-bottom: 4px dashed var(--color-text);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: background-color 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

summary::before {
  content: '▶';
  display: inline-block;
  transition: transform 0.2s ease;
  font-size: 0.8rem;
}

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

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

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

details div {
  padding: 1.5rem;
  background-image: repeating-linear-gradient(90deg, transparent, transparent 5px, var(--color-accent) 5px, var(--color-accent) 6px);
  animation: slideDown 0.2s ease;
}

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

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

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

button, input[type="submit"], input[type="button"] {
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: bold;
  padding: 0.875rem 2rem;
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 4px solid var(--color-text);
  cursor: pointer;
  text-transform: uppercase;
  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:active, input[type="submit"]:active, input[type="button"]:active {
  box-shadow: 2px 2px 0 var(--color-text);
  transform: translate(4px, 4px);
}

input[type="text"], input[type="email"], input[type="search"], textarea {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: 0.75rem 1rem;
  border: 4px solid var(--color-text);
  background-color: var(--color-bg);
  color: var(--color-text);
  width: 100%;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  background-image: repeating-linear-gradient(0deg, transparent, transparent 19px, var(--color-surface) 19px, var(--color-surface) 20px);
}

input[type="text"]:focus, input[type="email"]:focus, input[type="search"]:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 6px 6px 0 var(--color-accent);
}

textarea {
  min-height: 150px;
  resize: vertical;
}

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

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .site-nav {
    gap: 1rem;
    margin-top: 1.5rem;
  }

  .site-nav a {
    border-bottom: 4px solid var(--color-text);
  }

  .container {
    padding: 3rem;
  }

  .site-main {
    padding: 3rem 1.5rem;
  }
}

@media (min-width: 1024px) {
  body {
    font-size: 18px;
  }

  h1 {
    font-size: 3.5rem;
    padding: 1.5rem 2rem;
  }

  .site-header {
    padding: 2rem 1.5rem;
  }

  .site-nav {
    gap: 1.5rem;
  }

  .container {
    padding: 4rem;
  }

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

  .card:hover {
    box-shadow: 16px 16px 0 var(--color-secondary);
    transform: translate(-4px, -4px);
  }
}

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

  details div {
    animation: none;
  }
}

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

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

  .container {
    max-width: 100%;
    border: none;
    box-shadow: none;
    padding: 0;
  }

  a {
    color: black;
    border-bottom: 1px solid black;
  }

  .card {
    border: 2px solid black;
    box-shadow: none;
    page-break-inside: avoid;
  }

  table {
    border: 2px solid black;
    box-shadow: none;
  }

  h1 {
    background-color: white;
    color: black;
    box-shadow: none;
  }
}