* {
  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: 2.5rem;
  --spacing-xl: 4rem;
}

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

body {
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.7;
  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-sm);
  color: var(--color-secondary);
  letter-spacing: -0.02em;
}

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

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

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

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.1rem;
}

h6 {
  font-size: 1rem;
  color: var(--color-text-muted);
}

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-primary);
  outline-offset: 3px;
}

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

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

blockquote {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  padding-left: var(--spacing-lg);
  background-color: var(--color-surface);
  border-left: 5px solid var(--color-primary);
  font-style: italic;
  color: var(--color-text-muted);
  position: relative;
  transform: translateX(1rem);
}

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

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

.site-header {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  padding: var(--spacing-md) var(--spacing-sm);
  position: relative;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -8px;
  right: 5%;
  width: 150px;
  height: 8px;
  background-color: var(--color-primary);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.site-header h1 {
  color: var(--color-bg);
  margin: 0;
  font-size: 1.75rem;
  letter-spacing: 0.05em;
  position: relative;
  z-index: 2;
}

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

.site-nav a {
  color: var(--color-accent);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-bottom: none;
  background-color: rgba(255, 255, 255, 0.1);
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

.site-nav a:hover {
  background-color: var(--color-primary);
  color: var(--color-bg);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.2);
}

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

.site-main {
  flex: 1;
  padding: var(--spacing-lg) var(--spacing-sm);
}

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

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-family: 'Courier New', monospace;
}

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

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

.breadcrumbs::before {
  content: '→';
  color: var(--color-accent);
  margin-right: var(--spacing-xs);
}

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

.card::before {
  content: '';
  position: absolute;
  top: -6px;
  left: -6px;
  right: 6px;
  bottom: 6px;
  background-color: var(--color-accent);
  z-index: -1;
  transition: all 0.2s ease;
}

.card:hover {
  border-color: var(--color-primary);
}

.card:hover::before {
  top: -10px;
  left: -10px;
  right: 10px;
  bottom: 10px;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-md) 0;
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  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);
  text-align: left;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 3px solid var(--color-primary);
}

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

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

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

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

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

details::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--color-accent));
  opacity: 0.3;
  transform: translateX(100%);
  transition: transform 0.2s ease;
}

details[open]::after {
  transform: translateX(0);
}

summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-primary);
  padding: var(--spacing-xs);
  list-style: none;
  transition: color 0.2s ease;
  position: relative;
  padding-left: var(--spacing-lg);
  user-select: none;
}

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

summary::before {
  content: '▶';
  position: absolute;
  left: var(--spacing-xs);
  transition: transform 0.2s ease;
  color: var(--color-primary);
}

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

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

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

details > *:not(summary) {
  margin-top: var(--spacing-sm);
  padding-left: var(--spacing-md);
  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: var(--spacing-lg) var(--spacing-sm);
  margin-top: var(--spacing-xl);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 10%;
  width: 200px;
  height: 12px;
  background-color: var(--color-primary);
}

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

.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: var(--spacing-xs);
  font-size: 0.9rem;
}

button,
input[type="submit"],
input[type="button"] {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
  font-weight: 600;
  position: relative;
  overflow: hidden;
}

button:hover,
input[type="submit"]:hover,
input[type="button"]:hover {
  background-color: var(--color-secondary);
  box-shadow: 5px 5px 0 var(--color-accent);
}

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

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

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="search"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(67, 56, 202, 0.1);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

code,
pre {
  font-family: 'Courier New', monospace;
  background-color: var(--color-surface);
  padding: 0.2em 0.4em;
  border-left: 3px solid var(--color-primary);
  font-size: 0.9em;
}

pre {
  display: block;
  padding: var(--spacing-sm);
  margin: var(--spacing-md) 0;
  overflow-x: auto;
  position: relative;
}

pre::before {
  content: '';
  position: absolute;
  top: -4px;
  right: -4px;
  width: 40px;
  height: 40px;
  background-color: var(--color-accent);
  z-index: -1;
}

@media (min-width: 768px) {
  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 h1 {
    font-size: 2.25rem;
  }

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

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

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

  blockquote {
    margin-left: var(--spacing-lg);
    margin-right: var(--spacing-lg);
  }

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

  table {
    font-size: 1rem;
  }
}

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

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

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

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

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

  blockquote {
    transform: translateX(2rem);
  }

  details {
    padding: var(--spacing-md);
  }
}

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

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

  .site-header {
    box-shadow: none;
    border-bottom: 2px solid var(--color-text);
  }

  .site-main {
    padding: 0;
  }

  .container {
    max-width: 100%;
  }

  a {
    text-decoration: underline;
  }

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

  .card::before {
    display: none;
  }

  table {
    page-break-inside: avoid;
  }

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