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

:root {
  --color-primary: #4338ca;
  --color-secondary: #312e81;
  --color-accent: #c7d2fe;
  --color-bg: #ffffff;
  --color-surface: #f5f3ff;
  --color-text: #1e1b4b;
  --color-text-muted: #6366a0;
  --color-border: #d4d0e8;
  --font-main: 'Trebuchet MS', 'Lucida Sans', 'Lucida Grande', sans-serif;
  --max-width: 1100px;
  --radius: 0px;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-secondary);
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.5px;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2rem;
  margin-top: 2rem;
  position: relative;
  padding-left: 1rem;
}

h2::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 0;
  bottom: 0;
  width: 4px;
  background-color: var(--color-primary);
}

h3 {
  font-size: 1.5rem;
  margin-top: 1.5rem;
}

h4 {
  font-size: 1.25rem;
  margin-top: 1rem;
}

h5 {
  font-size: 1.1rem;
}

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

p {
  margin-bottom: 1rem;
}

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;
}

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

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

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

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

blockquote {
  margin: 2rem 0;
  padding: 1.5rem;
  background-color: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  position: relative;
  left: -12px;
  font-style: italic;
  color: var(--color-text-muted);
}

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

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

.site-header {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  padding: 1.5rem 1rem;
  box-shadow: 0 4px 12px rgba(49, 46, 129, 0.15);
  position: relative;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 5%;
  width: 60%;
  height: 8px;
  background-color: var(--color-primary);
}

.site-header h1 {
  color: var(--color-bg);
  margin: 0;
  font-family: 'Courier New', monospace;
  letter-spacing: 1px;
}

.site-nav {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-nav li {
  flex: 1 1 auto;
}

.site-nav a {
  display: block;
  padding: 1rem 1.5rem;
  color: var(--color-text);
  border-bottom: none;
  border-right: 1px solid var(--color-border);
  transition: background-color 0.2s ease, color 0.2s ease;
  font-weight: 600;
  text-align: center;
}

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

.site-nav li:last-child a {
  border-right: none;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.breadcrumbs {
  font-size: 0.875rem;
  margin-bottom: 2rem;
  padding: 0.75rem 1rem;
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  font-family: 'Courier New', monospace;
  position: relative;
  left: 8px;
}

.breadcrumbs a {
  color: var(--color-text-muted);
  border-bottom: 1px dotted var(--color-border);
}

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

.breadcrumbs span {
  margin: 0 0.5rem;
  color: var(--color-border);
}

.card {
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 8px 8px 0 var(--color-surface);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

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

.card h3 {
  margin-top: 0;
  color: var(--color-primary);
}

.card::before {
  content: '';
  position: absolute;
  top: -6px;
  right: -6px;
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  font-size: 0.95rem;
}

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

table th {
  padding: 1rem;
  text-align: left;
  font-weight: 700;
  border-bottom: 2px solid var(--color-primary);
  font-family: 'Courier New', monospace;
  letter-spacing: 0.5px;
}

table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

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

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

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

details {
  margin: 1.5rem 0;
  border: 2px solid var(--color-border);
  background-color: var(--color-bg);
  position: relative;
  overflow: hidden;
}

summary {
  padding: 1rem 1.5rem;
  background-color: var(--color-surface);
  cursor: pointer;
  font-weight: 700;
  color: var(--color-secondary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease, color 0.2s ease;
  user-select: none;
}

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

summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  transition: transform 0.2s ease;
}

details[open] summary::after {
  content: '−';
  transform: rotate(90deg);
}

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

details[open] summary {
  border-bottom: 2px solid var(--color-border);
}

details > *:not(summary) {
  padding: 1.5rem;
  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-secondary);
  color: var(--color-accent);
  padding: 2rem 1rem;
  margin-top: 4rem;
  border-top: 6px solid var(--color-primary);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -16px;
  right: 10%;
  width: 120px;
  height: 10px;
  background-color: var(--color-accent);
}

.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);
}

.site-footer p {
  margin-bottom: 0.5rem;
}

@media (min-width: 768px) {
  body {
    font-size: 17px;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
    padding-left: 1.5rem;
  }

  h2::before {
    width: 6px;
    left: -12px;
  }

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

  .site-header::after {
    left: 8%;
    width: 50%;
    height: 10px;
  }

  .site-main {
    padding: 3rem 2rem;
  }

  .site-nav a {
    padding: 1.25rem 2rem;
  }

  .card {
    padding: 2rem;
    box-shadow: 12px 12px 0 var(--color-surface);
  }

  .card:hover {
    box-shadow: 16px 16px 0 var(--color-accent);
  }

  blockquote {
    padding: 2rem;
    margin: 2.5rem 0;
    left: -20px;
  }

  .breadcrumbs {
    left: 16px;
    padding: 1rem 1.5rem;
  }
}

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

  .site-header {
    padding: 2.5rem 2rem;
  }

  .site-main {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .container {
    position: relative;
  }

  .container::before {
    content: '';
    position: absolute;
    top: 40px;
    right: -20px;
    width: 200px;
    height: 200px;
    background-color: var(--color-surface);
    z-index: -1;
    opacity: 0.6;
  }

  .card {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  table {
    font-size: 1rem;
  }

  .site-nav ul {
    padding: 0 2rem;
  }

  blockquote {
    font-size: 1.125rem;
    padding: 2.5rem;
  }
}

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

  details > *:not(summary) {
    animation: none;
  }

  summary::after {
    transition: none;
  }
}

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

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

  .site-header::after {
    display: none;
  }

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

  .container {
    max-width: 100%;
  }

  .card {
    box-shadow: none;
    border: 1px solid var(--color-text);
    page-break-inside: avoid;
  }

  .card::before {
    display: none;
  }

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

  details {
    border: 1px solid var(--color-text);
  }

  details summary {
    background-color: transparent;
  }

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