* {
  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;
  --grid-gap: 2rem;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

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: 1rem;
  letter-spacing: -0.02em;
  color: var(--color-secondary);
}

h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-left: 0.5rem;
}

h2 {
  font-size: 2.5rem;
  margin-top: 3rem;
  margin-bottom: 1.25rem;
  border-left: 6px solid var(--color-primary);
  padding-left: 1.5rem;
  margin-left: -1.5rem;
}

h3 {
  font-size: 1.875rem;
  margin-top: 2rem;
  color: var(--color-primary);
}

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

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

h6 {
  font-size: 1.125rem;
  margin-top: 1rem;
  color: var(--color-text-muted);
}

p {
  margin-bottom: 1.5rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
  padding-bottom: 2px;
}

a:hover {
  color: var(--color-secondary);
  border-bottom-color: var(--color-accent);
}

a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
  background-color: var(--color-surface);
}

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

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

blockquote {
  margin: 2rem 0 2rem 2rem;
  padding: 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-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 2rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(49, 46, 129, 0.05);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

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

.site-nav {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.site-nav a {
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--color-border);
  border-bottom: 2px solid var(--color-border);
  background-color: var(--color-bg);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  text-transform: uppercase;
  font-weight: 600;
}

.site-nav a:hover {
  background-color: var(--color-surface);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(67, 56, 202, 0.15);
}

.site-nav a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.site-main {
  min-height: 60vh;
  padding: 4rem 0;
}

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

.breadcrumbs {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  font-size: 0.95rem;
  margin-bottom: 2rem;
  padding: 1rem 1.5rem;
  background-color: var(--color-surface);
  border-left: 3px solid var(--color-primary);
  transform: translateX(-0.5rem);
}

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

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

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

.card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 4px 4px 0 var(--color-surface);
  position: relative;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: 8px 8px 0 var(--color-accent);
  transform: translate(-2px, -2px);
}

.card h3 {
  margin-top: 0;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 0.75rem;
}

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

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 2rem 0;
  border: 1px solid var(--color-border);
  font-size: 1rem;
  background-color: var(--color-bg);
}

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

table th {
  padding: 1rem 1.25rem;
  text-align: left;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 0.9rem;
  border-bottom: 3px solid var(--color-primary);
}

table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

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: 2px solid var(--color-border);
  background-color: var(--color-bg);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

details[open] {
  border-color: var(--color-primary);
  box-shadow: 4px 4px 0 var(--color-surface);
}

summary {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  background-color: var(--color-surface);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-secondary);
  user-select: none;
  transition: background-color 0.2s ease, color 0.2s ease;
  position: relative;
  padding-left: 3rem;
}

summary::before {
  content: '→';
  position: absolute;
  left: 1.5rem;
  transition: transform 0.2s ease;
  font-weight: 700;
}

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

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;
  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 0 2rem;
  margin-top: 6rem;
  border-top: 4px solid var(--color-primary);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.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;
  font-size: 0.95rem;
}

ul, ol {
  margin: 1.5rem 0;
  padding-left: 2.5rem;
}

ul li, ol li {
  margin-bottom: 0.75rem;
  padding-left: 0.5rem;
}

ul {
  list-style-type: none;
}

ul li::before {
  content: '■';
  color: var(--color-primary);
  font-size: 0.7em;
  margin-left: -1.5rem;
  margin-right: 1rem;
  display: inline-block;
}

ol {
  list-style-type: none;
  counter-reset: item;
}

ol li {
  counter-increment: item;
  position: relative;
}

ol li::before {
  content: counter(item) '.';
  color: var(--color-primary);
  font-weight: 700;
  margin-left: -2.5rem;
  margin-right: 1rem;
  display: inline-block;
  width: 1.5rem;
  text-align: right;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--color-border);
}

input, textarea, select {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
  margin-bottom: 1rem;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 4px 4px 0 var(--color-accent);
}

button, .button {
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 700;
  padding: 1rem 2rem;
  border: 2px solid var(--color-primary);
  background-color: var(--color-primary);
  color: var(--color-bg);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-block;
}

button:hover, .button:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(49, 46, 129, 0.2);
}

button:focus-visible, .button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

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

hr::after {
  content: '✦';
  position: absolute;
  top: -0.65rem;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-bg);
  padding: 0 1rem;
  color: var(--color-primary);
  font-size: 1rem;
}

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

  h2 {
    font-size: 3rem;
  }

  h3 {
    font-size: 2.25rem;
  }

  .site-header .container {
    flex-wrap: nowrap;
  }

  .site-nav {
    gap: 0.5rem;
  }

  .card {
    padding: 2.5rem;
  }

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

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

@media (min-width: 1024px) {
  body {
    font-size: 1.25rem;
  }

  .site-main {
    padding: 6rem 0;
  }

  h1 {
    font-size: 5.5rem;
    margin-left: -0.25rem;
  }

  h2 {
    font-size: 3.5rem;
    margin-left: -2rem;
    padding-left: 2rem;
  }

  .container {
    padding: 0 2rem;
  }

  .card {
    padding: 3rem;
    margin-left: 1rem;
  }

  .card:nth-child(even) {
    margin-left: -1rem;
    margin-right: 1rem;
  }

  blockquote {
    margin-left: 4rem;
    padding: 2rem 3rem;
  }

  table {
    margin-left: 0.5rem;
    margin-right: -0.5rem;
  }
}

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

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

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

  .site-main {
    padding: 0;
  }

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

  a {
    color: var(--color-text);
    border-bottom: 1px solid var(--color-text);
  }

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

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  h1 {
    font-size: 24pt;
  }

  h2 {
    font-size: 20pt;
    page-break-after: avoid;
  }

  h3 {
    font-size: 16pt;
    page-break-after: avoid;
  }
}