* {
  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: 0;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
}

html {
  scroll-behavior: smooth;
}

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 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-secondary);
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
  position: relative;
}

h2 {
  font-size: 2rem;
  margin-top: var(--spacing-xl);
}

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

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

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

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

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

a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

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

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

blockquote {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  font-style: italic;
  color: var(--color-text-muted);
  position: relative;
  left: -1rem;
}

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

.site-header {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  padding: var(--spacing-md) var(--spacing-sm);
  box-shadow: 4px 4px 0 rgba(67, 56, 202, 0.2);
  position: relative;
  margin-bottom: var(--spacing-xl);
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 2rem;
  width: 120px;
  height: 4px;
  background-color: var(--color-primary);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.site-nav a {
  color: var(--color-bg);
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: rgba(255, 255, 255, 0.1);
  border: 2px solid transparent;
  font-weight: 600;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

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

.site-nav a:focus-visible {
  outline-color: var(--color-accent);
}

.site-main {
  flex: 1;
  padding: 0 var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
}

.site-footer {
  background-color: var(--color-surface);
  padding: var(--spacing-lg) var(--spacing-sm);
  margin-top: auto;
  border-top: 4px solid var(--color-border);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -12px;
  right: 3rem;
  width: 80px;
  height: 8px;
  background-color: var(--color-primary);
}

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

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-sm);
  background-color: var(--color-surface);
  font-family: 'Courier New', monospace;
  position: relative;
  left: 1rem;
  width: fit-content;
}

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

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

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

.card {
  background-color: var(--color-bg);
  border: 3px solid var(--color-border);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: 6px 6px 0 var(--color-surface);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

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

.card::before {
  content: '';
  position: absolute;
  top: -6px;
  right: 2rem;
  width: 60px;
  height: 3px;
  background-color: var(--color-primary);
}

.card h2, .card h3 {
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: var(--spacing-lg) 0;
  border: 3px solid var(--color-border);
  background-color: var(--color-bg);
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
}

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

table th {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  font-weight: 700;
  border-bottom: 3px solid var(--color-primary);
}

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

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

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

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

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

details {
  margin: var(--spacing-md) 0;
  border: 2px solid var(--color-border);
  background-color: var(--color-surface);
  overflow: hidden;
  position: relative;
  left: 0.5rem;
}

summary {
  padding: var(--spacing-md);
  cursor: pointer;
  background-color: var(--color-surface);
  font-weight: 700;
  color: var(--color-secondary);
  list-style: none;
  transition: background-color 0.2s ease, color 0.2s ease;
  border-left: 6px solid transparent;
}

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

summary::before {
  content: '▶';
  display: inline-block;
  margin-right: var(--spacing-sm);
  transition: transform 0.2s ease;
  font-family: monospace;
}

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

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

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

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

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

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

@media (min-width: 768px) {
  body {
    font-size: 18px;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .site-header {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .site-header::after {
    width: 180px;
    left: 3rem;
  }

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

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

  .site-footer {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .breadcrumbs {
    left: 2rem;
  }

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

  blockquote {
    left: -2rem;
    padding: var(--spacing-lg) var(--spacing-xl);
  }

  table {
    font-size: 1rem;
  }
}

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

  .site-header {
    padding: var(--spacing-xl) var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
  }

  .site-header .container {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: var(--spacing-lg);
  }

  .site-nav {
    margin-top: 0;
    justify-content: flex-end;
  }

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

  .site-footer {
    padding: var(--spacing-2xl) var(--spacing-lg);
  }

  .site-footer .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
  }

  .breadcrumbs {
    left: 3rem;
  }

  .card {
    margin-bottom: var(--spacing-xl);
  }
}

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

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

  summary::before {
    transition: none;
  }
}

@media print {
  .site-nav,
  .breadcrumbs,
  details summary::before {
    display: none;
  }

  .site-header,
  .site-footer {
    background-color: transparent;
    color: var(--color-text);
    box-shadow: none;
    border: none;
  }

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

  .card {
    box-shadow: none;
    page-break-inside: avoid;
  }

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

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: var(--color-text-muted);
  }

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