* {
  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: 'Courier New', 'Lucida Console', Monaco, monospace;
  --max-width: 1100px;
  --radius: 12px;
}

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

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

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

h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  text-shadow: 2px 2px 0 var(--color-accent);
}

h2 {
  font-size: 2rem;
  margin-top: 2rem;
  position: relative;
  padding-left: 1.5rem;
}

h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.2rem;
  width: 6px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
  border-radius: 3px;
}

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;
}

p {
  margin-bottom: 1rem;
}

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: 4px;
  border-radius: 4px;
}

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

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

blockquote {
  margin: 2rem 0;
  padding: 1.5rem 1.5rem 1.5rem 2rem;
  background-color: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: 4px 4px 12px rgba(67, 56, 202, 0.1);
  position: relative;
  transform: translateX(1rem);
}

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

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

.site-header {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  color: var(--color-bg);
  padding: 2rem 1rem;
  box-shadow: 0 6px 20px rgba(67, 56, 202, 0.2);
  position: relative;
  overflow: hidden;
}

.site-header::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(199, 210, 254, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.site-header .container {
  position: relative;
  z-index: 1;
}

.site-header h1 {
  color: var(--color-bg);
  text-shadow: 3px 3px 0 rgba(0, 0, 0, 0.2);
  margin-bottom: 0.5rem;
}

.site-header p {
  color: var(--color-accent);
  font-size: 1.1rem;
  margin-bottom: 0;
}

.site-nav {
  background-color: var(--color-surface);
  padding: 0;
  box-shadow: 0 4px 12px rgba(67, 56, 202, 0.08);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-nav .container {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}

.site-nav a {
  padding: 1rem 1.5rem;
  display: block;
  color: var(--color-text);
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  font-weight: bold;
}

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

.site-nav a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: -3px;
  border-radius: 0;
}

.site-main {
  flex: 1;
  padding: 3rem 1rem;
}

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

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding: 1rem 1.5rem;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: 0 2px 8px rgba(67, 56, 202, 0.06);
  font-size: 0.9rem;
  transform: translateX(-0.5rem);
}

.breadcrumbs a {
  color: var(--color-primary);
  border-bottom: none;
}

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

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

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 16px rgba(67, 56, 202, 0.08);
  transition: box-shadow 0.2s ease, background-color 0.2s ease;
  position: relative;
}

.card:hover {
  box-shadow: 0 8px 24px rgba(67, 56, 202, 0.15);
  background-color: var(--color-bg);
}

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

.card::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 2rem;
  width: 60px;
  height: 4px;
  background: linear-gradient(to right, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 2rem 0;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(67, 56, 202, 0.08);
}

table thead {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-bg);
}

table th {
  padding: 1rem;
  text-align: left;
  font-weight: bold;
  border-bottom: 3px solid var(--color-secondary);
}

table td {
  padding: 1rem;
  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: 1.5rem 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(67, 56, 202, 0.06);
  transition: box-shadow 0.2s ease;
}

details:hover {
  box-shadow: 0 4px 12px rgba(67, 56, 202, 0.12);
}

details[open] {
  box-shadow: 0 6px 16px rgba(67, 56, 202, 0.15);
}

summary {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-weight: bold;
  color: var(--color-secondary);
  background-color: var(--color-surface);
  transition: background-color 0.2s ease, color 0.2s ease;
  list-style: none;
  position: relative;
  user-select: none;
}

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

summary::after {
  content: '+';
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--color-primary);
  transition: transform 0.2s ease, color 0.2s ease;
}

details[open] summary::after {
  content: '−';
  transform: translateY(-50%) rotate(180deg);
  color: var(--color-secondary);
}

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

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

details > *:not(summary) {
  padding: 1.5rem;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg);
  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: 3rem 1rem 2rem;
  margin-top: 4rem;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -20px;
  left: 10%;
  width: 80%;
  height: 20px;
  background: linear-gradient(to right, transparent, var(--color-primary), transparent);
  border-radius: var(--radius) var(--radius) 0 0;
}

.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) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

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

  .site-main {
    padding: 4rem 2rem;
  }

  .site-nav .container {
    justify-content: center;
  }

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

  .card {
    padding: 2.5rem;
    transform: translateX(-1rem);
  }

  .card:nth-child(even) {
    transform: translateX(1rem);
  }

  blockquote {
    margin-left: 2rem;
    margin-right: -1rem;
  }

  table {
    transform: translateY(0.5rem);
  }

  details {
    transform: translateX(0.5rem);
  }

  details:nth-of-type(even) {
    transform: translateX(-0.5rem);
  }
}

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

  h2 {
    font-size: 2.5rem;
  }

  .site-header {
    padding: 4rem 2rem;
  }

  .site-main {
    padding: 5rem 2rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .card {
    padding: 3rem;
  }

  .card:nth-child(odd) {
    transform: translateX(-2rem);
  }

  .card:nth-child(even) {
    transform: translateX(2rem);
  }

  blockquote {
    margin-left: 3rem;
    margin-right: -2rem;
    transform: translateX(2rem) translateY(0.5rem);
  }

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

  .breadcrumbs {
    transform: translateX(-1rem) translateY(0.5rem);
  }

  .site-footer {
    padding: 4rem 2rem 3rem;
  }
}

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

  html {
    scroll-behavior: auto;
  }

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

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

  .site-header {
    background: none;
    color: var(--color-text);
    box-shadow: none;
    padding: 1rem 0;
  }

  .site-header h1 {
    color: var(--color-text);
    text-shadow: none;
  }

  .site-main {
    padding: 1rem 0;
  }

  .container {
    max-width: 100%;
  }

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

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

  details {
    border: 1px solid var(--color-border);
    box-shadow: none;
    transform: none;
  }

  details summary::after {
    display: none;
  }

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

  .site-footer {
    background: none;
    color: var(--color-text);
    padding: 1rem 0;
    margin-top: 2rem;
    border-top: 2px solid var(--color-border);
  }

  .site-footer::before {
    display: none;
  }
}