* {
  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: 'Georgia', 'Times New Roman', 'Palatino', serif;
  --max-width: 1100px;
  --radius: 2px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
}

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

body {
  font-family: var(--font-main);
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
}

h1 {
  font-size: 3.5rem;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-md);
  position: relative;
  left: -0.125rem;
}

h2 {
  font-size: 2.5rem;
  color: var(--color-secondary);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  transform: translateX(-4px);
}

h3 {
  font-size: 1.875rem;
  color: var(--color-primary);
  margin-top: var(--spacing-md);
}

h4 {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-top: var(--spacing-md);
}

h5 {
  font-size: 1.25rem;
  color: var(--color-text);
}

h6 {
  font-size: 1.125rem;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

p {
  margin-bottom: var(--spacing-sm);
  max-width: 75ch;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

a:hover {
  color: var(--color-secondary);
  text-decoration-thickness: 2px;
}

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

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

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

blockquote {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  padding-left: var(--spacing-lg);
  background-color: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  font-style: italic;
  font-size: 1.25rem;
  color: var(--color-text-muted);
  position: relative;
  transform: translateX(var(--spacing-sm));
}

blockquote::before {
  content: '"';
  font-size: 4rem;
  color: var(--color-accent);
  position: absolute;
  left: var(--spacing-sm);
  top: -0.5rem;
  line-height: 1;
}

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

.site-header {
  background-color: var(--color-bg);
  border-bottom: 2px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(67, 56, 202, 0.08);
}

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

.site-header h1 {
  font-size: 1.75rem;
  margin: 0;
  color: var(--color-secondary);
  letter-spacing: -0.03em;
  left: 0;
}

.site-header a {
  text-decoration: none;
  color: inherit;
}

.site-nav {
  justify-self: end;
  transform: translateX(var(--spacing-sm));
}

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

.site-nav a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  transition: color 0.2s ease, background-color 0.2s ease;
  display: block;
}

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

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

.site-main {
  min-height: 70vh;
  padding: var(--spacing-lg) 0;
}

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

.breadcrumbs {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
  position: relative;
  left: -2px;
}

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

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

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

.card {
  background-color: var(--color-surface);
  border: 1px solid 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;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: -8px;
  left: var(--spacing-md);
  width: 60px;
  height: 4px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

.card:hover {
  box-shadow: 0 8px 24px rgba(67, 56, 202, 0.12);
  border-color: var(--color-primary);
}

.card h3 {
  margin-top: 0;
}

.card p:last-child {
  margin-bottom: 0;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: var(--spacing-md) 0;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(67, 56, 202, 0.06);
}

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;
  letter-spacing: 0.02em;
  border-bottom: 2px solid var(--color-primary);
}

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

table tbody tr {
  background-color: var(--color-bg);
  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);
  border-radius: var(--radius);
  background-color: var(--color-bg);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

details[open] {
  border-color: var(--color-primary);
}

details summary {
  padding: var(--spacing-md);
  cursor: pointer;
  font-weight: 700;
  color: var(--color-secondary);
  background-color: var(--color-surface);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease, color 0.2s ease;
  position: relative;
  left: 4px;
}

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

details summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--color-primary);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

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

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

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

details p {
  padding: var(--spacing-md);
  padding-top: var(--spacing-sm);
  animation: slideDown 0.2s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-accent);
  padding: var(--spacing-lg) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
  border-top: 4px solid var(--color-primary);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -20px;
  left: 10%;
  width: 120px;
  height: 8px;
  background-color: var(--color-primary);
  transform: skewX(-15deg);
}

.site-footer .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.site-footer a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

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

.site-footer p {
  color: var(--color-accent);
  margin-bottom: var(--spacing-xs);
}

.site-footer h4 {
  color: var(--color-bg);
  margin-top: 0;
  font-size: 1.125rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.offset-section {
  margin-left: var(--spacing-md);
  padding: var(--spacing-lg);
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-primary);
  position: relative;
}

.offset-section::after {
  content: '';
  position: absolute;
  top: var(--spacing-md);
  right: -12px;
  width: 80px;
  height: 80px;
  background-color: var(--color-accent);
  border-radius: 50%;
  z-index: -1;
}

.overlap-container {
  position: relative;
  margin: var(--spacing-lg) 0;
}

.overlap-content {
  background-color: var(--color-bg);
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  position: relative;
  z-index: 2;
  transform: translateY(var(--spacing-md));
}

.overlap-background {
  background-color: var(--color-primary);
  padding: var(--spacing-lg);
  position: relative;
  z-index: 1;
  min-height: 200px;
}

.asymmetric-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.asymmetric-item:nth-child(odd) {
  transform: translateX(var(--spacing-sm));
}

.asymmetric-item:nth-child(even) {
  transform: translateX(calc(-1 * var(--spacing-sm)));
}

@media (min-width: 768px) {
  h1 {
    font-size: 4.5rem;
  }

  h2 {
    font-size: 3rem;
  }

  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer .container {
    grid-template-columns: repeat(2, 1fr);
  }

  .asymmetric-grid {
    grid-template-columns: 1.5fr 1fr;
  }

  .offset-section {
    margin-left: var(--spacing-lg);
  }

  .overlap-content {
    width: 85%;
    margin-left: auto;
    transform: translateY(var(--spacing-lg));
  }

  table {
    font-size: 1.125rem;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 5.5rem;
  }

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .site-footer .container {
    grid-template-columns: repeat(3, 1fr);
  }

  .asymmetric-grid {
    grid-template-columns: 2fr 1fr;
  }

  .offset-section {
    margin-left: var(--spacing-xl);
  }

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

@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 summary::after {
    transition: none;
  }

  details[open] summary::after {
    transform: none;
  }
}

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

  .site-main {
    padding: 0;
  }

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

  a {
    text-decoration: none;
    color: var(--color-text);
  }

  a::after {
    content: " (" attr(href) ")";
    font-size: 0.875rem;
    color: var(--color-text-muted);
  }

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

  details summary::after {
    display: none;
  }

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