* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #dc2626;
  --color-secondary: #991b1b;
  --color-accent: #fca5a5;
  --color-bg: #ffffff;
  --color-surface: #fef2f2;
  --color-text: #1c1917;
  --color-text-muted: #78716c;
  --color-border: #e7e5e4;
  --font-main: 'Georgia', 'Times New Roman', 'Palatino', serif;
  --max-width: 1100px;
  --radius: 12px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
}

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

body {
  font-family: var(--font-main);
  font-size: 1.125rem;
  line-height: 1.8;
  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: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

h1 {
  font-size: 3rem;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2.25rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1.125rem;
}

p {
  margin-bottom: var(--spacing-md);
  max-width: 70ch;
}

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

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

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: 2px;
}

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

em {
  font-style: italic;
}

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

blockquote {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  background: rgba(254, 242, 242, 0.7);
  backdrop-filter: blur(10px);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius);
  font-style: italic;
  color: var(--color-text-muted);
}

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

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

.site-header {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow 0.2s ease;
}

.site-header:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

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

.site-header h1 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--color-secondary);
}

.site-header a {
  color: var(--color-text);
  font-weight: 600;
}

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

.site-nav {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  flex-wrap: wrap;
}

.site-nav a {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: calc(var(--radius) / 2);
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

.site-nav a:focus-visible {
  background-color: var(--color-surface);
}

.site-main {
  min-height: 70vh;
  padding: var(--spacing-xl) 0;
}

.site-footer {
  background: linear-gradient(135deg, rgba(254, 242, 242, 0.8) 0%, rgba(255, 255, 255, 0.9) 100%);
  backdrop-filter: blur(15px);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
}

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

.site-footer p {
  color: var(--color-text-muted);
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
}

.breadcrumbs {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

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

.breadcrumbs span {
  user-select: none;
}

.card {
  background: rgba(254, 242, 242, 0.6);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  transition: box-shadow 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}

.card:hover {
  box-shadow: 0 8px 30px rgba(220, 38, 38, 0.1);
  transform: translateY(-2px);
  background: rgba(254, 242, 242, 0.8);
}

.card h2, .card h3, .card h4 {
  margin-top: 0;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

table thead {
  background: linear-gradient(135deg, rgba(220, 38, 38, 0.1) 0%, rgba(153, 27, 27, 0.15) 100%);
  backdrop-filter: blur(10px);
}

table th {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  font-weight: 700;
  color: var(--color-secondary);
  border-bottom: 2px solid var(--color-border);
}

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

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

table tbody tr:nth-child(even) {
  background: rgba(254, 242, 242, 0.3);
}

table tbody tr:hover {
  background: rgba(252, 165, 165, 0.2);
}

table tbody tr:last-child td {
  border-bottom: none;
}

details {
  margin: var(--spacing-md) 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}

details:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

details[open] {
  box-shadow: 0 6px 24px rgba(220, 38, 38, 0.12);
}

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

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

summary::after {
  content: '+';
  position: absolute;
  right: var(--spacing-md);
  font-size: 1.5rem;
  line-height: 1;
  transition: transform 0.2s ease;
}

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

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

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

details div {
  padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
  color: var(--color-text);
}

details div p:last-child {
  margin-bottom: 0;
}

ul, ol {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-xs);
  line-height: 1.8;
}

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

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

button, .button {
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  padding: var(--spacing-sm) var(--spacing-md);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: box-shadow 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
  display: inline-block;
}

button:hover, .button:hover {
  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.3);
  transform: translateY(-1px);
  color: white;
}

button:active, .button:active {
  transform: translateY(0);
}

button:focus-visible, .button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

input, textarea, select {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius) / 2);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(5px);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

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

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-lg) 0;
}

code {
  font-family: 'Courier New', monospace;
  background: rgba(254, 242, 242, 0.8);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--color-secondary);
}

pre {
  background: rgba(28, 25, 23, 0.95);
  backdrop-filter: blur(8px);
  color: var(--color-accent);
  padding: var(--spacing-md);
  border-radius: var(--radius);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
}

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

  h2 {
    font-size: 2.75rem;
  }

  h3 {
    font-size: 2rem;
  }

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

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

  .site-nav {
    gap: var(--spacing-lg);
    flex-wrap: nowrap;
  }

  .site-footer .container {
    grid-template-columns: repeat(2, 1fr);
    text-align: left;
  }

  .site-main {
    padding: var(--spacing-xl) 0 calc(var(--spacing-xl) * 1.5) 0;
  }

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

  table th, table td {
    padding: var(--spacing-md) var(--spacing-lg);
  }
}

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

  h2 {
    font-size: 3rem;
  }

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

  .site-main {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  blockquote {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg) var(--spacing-xl);
  }
}

@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;
  }
}

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

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

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

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

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

  details {
    border: 1px solid var(--color-border);
  }

  details summary::after {
    display: none;
  }
}