* {
  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-unit: 1.5rem;
}

html {
  font-size: 16px;
  line-height: 1.6;
}

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background-color: var(--color-bg);
  font-size: 1rem;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  position: relative;
  transform: translateX(-3px);
}

h2 {
  font-size: 2.25rem;
  margin-top: 2.5rem;
  margin-bottom: 1.25rem;
  border-left: 6px solid var(--color-primary);
  padding-left: 1.25rem;
  margin-left: -1.5rem;
}

h3 {
  font-size: 1.75rem;
  margin-top: 2rem;
  color: var(--color-secondary);
}

h4 {
  font-size: 1.5rem;
  margin-top: 1.75rem;
}

h5 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
}

h6 {
  font-size: 1.125rem;
  margin-top: 1.25rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

p {
  margin-bottom: 1rem;
  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;
}

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

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

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

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

blockquote {
  margin: 2rem 0 2rem 2rem;
  padding: 1.5rem 1.5rem 1.5rem 2rem;
  background-color: var(--color-surface);
  border-left: 8px solid var(--color-primary);
  font-style: italic;
  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-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  padding: 2rem 0;
  position: relative;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 40%;
  height: 4px;
  background-color: var(--color-primary);
  transform: translateX(10%);
}

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

.site-header h1 {
  font-size: 2rem;
  margin: 0;
  transform: none;
}

.site-header a {
  text-decoration: none;
  color: var(--color-secondary);
}

.site-nav {
  background-color: var(--color-bg);
  position: relative;
  z-index: 10;
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0;
  padding: 0;
}

.site-nav li {
  position: relative;
}

.site-nav a {
  display: block;
  padding: 1rem 1.5rem;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 400;
  transition: background-color 0.2s ease, color 0.2s ease;
  border-bottom: 3px solid transparent;
}

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

.site-main {
  min-height: 60vh;
  padding: 3rem 0;
}

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

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  padding: 0.75rem 1rem;
  background-color: var(--color-surface);
  border-left: 3px solid var(--color-accent);
  transform: translateX(-0.5rem);
}

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

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

.breadcrumbs span {
  margin: 0 0.25rem;
}

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-accent);
  padding: 3rem 0 2rem;
  margin-top: 5rem;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -20px;
  right: 10%;
  width: 30%;
  height: 20px;
  background-color: var(--color-primary);
}

.site-footer a {
  color: var(--color-accent);
  text-decoration: underline;
}

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

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  font-size: 0.95rem;
  position: relative;
  transform: translateX(0.5rem);
}

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

table th {
  text-align: left;
  padding: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

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(even) {
  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);
  border-radius: var(--radius);
  background-color: var(--color-bg);
  overflow: hidden;
  position: relative;
  transform: translateX(-0.25rem);
}

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

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

summary::before {
  content: '▶';
  display: inline-block;
  margin-right: 0.75rem;
  transition: transform 0.2s ease;
  color: var(--color-primary);
}

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

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

details div {
  padding: 1.5rem;
  border-top: 1px solid var(--color-border);
}

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

.card::before {
  content: '';
  position: absolute;
  top: -8px;
  right: -8px;
  width: 60px;
  height: 60px;
  background-color: var(--color-primary);
  opacity: 0.1;
  border-radius: var(--radius);
  z-index: -1;
}

.card:hover {
  box-shadow: 0 8px 24px rgba(67, 56, 202, 0.15);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.card h2, .card h3 {
  margin-top: 0;
  border-left: none;
  padding-left: 0;
  margin-left: 0;
}

ul, ol {
  margin: 1rem 0 1rem 2rem;
  padding: 0;
}

li {
  margin-bottom: 0.5rem;
  padding-left: 0.5rem;
}

ul li::marker {
  color: var(--color-primary);
}

ol li::marker {
  color: var(--color-primary);
  font-weight: 700;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  margin: 1.5rem 0;
}

code {
  font-family: 'Courier New', monospace;
  background-color: var(--color-surface);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius);
  font-size: 0.9em;
  color: var(--color-secondary);
  border: 1px solid var(--color-border);
}

pre {
  background-color: var(--color-surface);
  padding: 1.5rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  border-left: 4px solid var(--color-primary);
}

pre code {
  background: none;
  padding: 0;
  border: none;
}

hr {
  border: none;
  border-top: 2px solid var(--color-border);
  margin: 3rem 0;
  position: relative;
}

hr::after {
  content: '';
  position: absolute;
  top: -4px;
  left: 20%;
  width: 15%;
  height: 6px;
  background-color: var(--color-primary);
}

button, input[type="submit"], input[type="button"] {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: 0.75rem 1.5rem;
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  font-weight: 700;
}

button:hover, input[type="submit"]:hover, input[type="button"]:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: 0 4px 12px rgba(49, 46, 129, 0.3);
}

button:focus-visible, input[type="submit"]:focus-visible, input[type="button"]:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

input[type="text"], input[type="email"], input[type="search"], textarea, select {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: 0.75rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
  max-width: 500px;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-accent);
}

@media (min-width: 768px) {
  h1 {
    font-size: 3.5rem;
    transform: translateX(-5px);
  }

  h2 {
    font-size: 2.5rem;
    margin-left: -2rem;
    padding-left: 1.5rem;
  }

  .site-main {
    padding: 4rem 0;
  }

  .site-header {
    padding: 2.5rem 0;
  }

  .site-nav ul {
    gap: 0.5rem;
  }

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

  table {
    transform: translateX(1rem);
  }

  .card {
    padding: 2.5rem;
  }

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

@media (min-width: 1024px) {
  h1 {
    font-size: 4rem;
  }

  h2 {
    font-size: 3rem;
  }

  .site-main {
    padding: 5rem 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .site-header .container {
    gap: 2rem;
  }

  .site-nav ul {
    gap: 1rem;
  }

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

  p {
    font-size: 1.0625rem;
  }

  blockquote {
    margin-left: 4rem;
    padding-left: 2.5rem;
    transform: translateX(3rem);
  }

  .card::before {
    width: 80px;
    height: 80px;
    top: -12px;
    right: -12px;
  }
}

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

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

  .site-main {
    padding: 0;
    min-height: auto;
  }

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

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

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

  table {
    transform: none;
  }

  blockquote {
    transform: none;
    page-break-inside: avoid;
  }

  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
  }

  img {
    max-width: 100%;
    page-break-inside: avoid;
  }
}