* {
  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;
  --shadow-sm: 0 2px 8px rgba(67, 56, 202, 0.08);
  --shadow-md: 0 4px 16px rgba(67, 56, 202, 0.12);
  --shadow-lg: 0 8px 24px rgba(67, 56, 202, 0.16);
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(circle at 20% 30%, var(--color-surface) 0%, transparent 50%),
                    radial-gradient(circle at 80% 70%, var(--color-accent) 0%, transparent 50%);
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-secondary);
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
  position: relative;
  padding-bottom: 0.5rem;
}

h1::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
  transform: translateX(10%);
}

h2 {
  font-size: 2rem;
  margin-top: 2.5rem;
  transform: translateX(-8px);
}

h3 {
  font-size: 1.5rem;
  margin-top: 2rem;
  color: var(--color-primary);
}

h4 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
}

h5 {
  font-size: 1.1rem;
  margin-top: 1.25rem;
}

h6 {
  font-size: 1rem;
  margin-top: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

p {
  margin-bottom: 1.25rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  position: relative;
  transition: color 0.2s ease, background-color 0.2s ease;
  padding: 2px 4px;
  border-radius: 4px;
}

a:hover {
  color: var(--color-secondary);
  background-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 1.5rem 1.5rem 2rem;
  background: var(--color-surface);
  border-left: 5px solid var(--color-primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  position: relative;
  transform: translateX(1rem);
  font-style: italic;
  color: var(--color-text-muted);
}

blockquote::before {
  content: '"';
  font-size: 4rem;
  position: absolute;
  top: -10px;
  left: 10px;
  color: var(--color-accent);
  line-height: 1;
  opacity: 0.5;
}

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

.site-header {
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 3px solid var(--color-accent);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.site-header:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  gap: 2rem;
}

.site-header h1 {
  margin: 0;
  padding: 0;
  font-size: 1.75rem;
}

.site-header h1::after {
  display: none;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.site-nav li {
  display: inline-block;
}

.site-nav a {
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius);
  background: var(--color-bg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: background-color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  display: block;
}

.site-nav a:hover {
  background: var(--color-primary);
  color: var(--color-bg);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.site-main {
  flex: 1;
  padding: 3rem 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-footer {
  background: var(--color-secondary);
  color: var(--color-accent);
  padding: 2.5rem 0;
  margin-top: 4rem;
  position: relative;
  overflow: hidden;
  border-top: 4px solid var(--color-primary);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: var(--color-primary);
  border-radius: 50%;
  opacity: 0.1;
}

.site-footer a {
  color: var(--color-accent);
  padding: 2px 6px;
}

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

.breadcrumbs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  padding: 0.75rem 1.25rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transform: translateX(-0.5rem);
  font-size: 0.9rem;
}

.breadcrumbs a {
  color: var(--color-text-muted);
  padding: 0.25rem 0.5rem;
}

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

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

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

.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.card::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 20px;
  width: 80px;
  height: 6px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 0 0 4px 4px;
}

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

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 2rem 0;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  background: var(--color-bg);
}

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

th {
  padding: 1rem;
  text-align: left;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

td {
  padding: 1rem;
  border-top: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

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

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

tbody tr:hover td {
  color: var(--color-secondary);
}

details {
  margin: 1.5rem 0;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
  overflow: hidden;
}

details:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

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

summary {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-weight: 700;
  color: var(--color-secondary);
  background: var(--color-bg);
  list-style: none;
  position: relative;
  padding-right: 3rem;
  transition: background-color 0.2s ease, color 0.2s ease;
  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;
}

details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

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

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

details > *:not(summary) {
  padding: 0 1.5rem 1.5rem 1.5rem;
  animation: slideDown 0.2s ease;
}

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

@media (max-width: 767px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
    transform: translateX(-4px);
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  .site-header .container {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  
  .site-nav ul {
    flex-direction: column;
    width: 100%;
  }
  
  .site-nav a {
    width: 100%;
    text-align: center;
  }
  
  .breadcrumbs {
    transform: translateX(0);
  }
  
  blockquote {
    transform: translateX(0);
    padding-left: 1.5rem;
  }
  
  table {
    font-size: 0.875rem;
  }
  
  th, td {
    padding: 0.75rem 0.5rem;
  }
  
  .card {
    padding: 1.5rem;
  }
}

@media (min-width: 768px) {
  body {
    font-size: 17px;
  }
  
  .site-main {
    padding: 4rem 0;
  }
  
  .container {
    padding: 0 2rem;
  }
  
  .site-header .container {
    padding: 1.5rem 2rem;
  }
  
  .breadcrumbs {
    display: inline-flex;
    margin-bottom: 2.5rem;
  }
  
  h1 {
    font-size: 3rem;
  }
  
  h2 {
    font-size: 2.25rem;
  }
}

@media (min-width: 1024px) {
  body {
    font-size: 18px;
  }
  
  .site-main {
    padding: 5rem 0;
  }
  
  h1 {
    font-size: 3.5rem;
  }
  
  h2 {
    font-size: 2.5rem;
    transform: translateX(-12px);
  }
  
  .card {
    padding: 2.5rem;
  }
  
  blockquote {
    padding: 2rem 2rem 2rem 2.5rem;
    transform: translateX(2rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .card:hover {
    transform: none;
  }
  
  .site-nav a:hover {
    transform: none;
  }
  
  details > *:not(summary) {
    animation: none;
  }
}

@media print {
  body {
    background: white;
    color: black;
  }
  
  .site-header,
  .site-nav,
  .site-footer,
  .breadcrumbs {
    display: none;
  }
  
  .site-main {
    padding: 0;
  }
  
  .container {
    max-width: 100%;
    padding: 0;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
  
  a {
    text-decoration: underline;
    color: black;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }
  
  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
    color: black;
  }
  
  table {
    page-break-inside: avoid;
    border: 1px solid black;
  }
  
  thead {
    display: table-header-group;
    background: #eee;
    color: black;
  }
  
  tr {
    page-break-inside: avoid;
  }
}