* {
  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;
  --transition: 0.2s ease;
}

body {
  font-family: var(--font-main);
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

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

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

h4 {
  font-size: 1.25rem;
  margin-top: var(--spacing-md);
}

h5 {
  font-size: 1.125rem;
  margin-top: var(--spacing-sm);
}

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

p {
  margin-bottom: var(--spacing-sm);
}

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

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

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-md) 0;
  padding: var(--spacing-md);
  background: linear-gradient(135deg, rgba(254, 242, 242, 0.8), rgba(252, 165, 165, 0.1));
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--color-text-muted);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

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, 0.7);
  backdrop-filter: blur(20px);
  -webkit-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 var(--transition);
}

.site-header:hover {
  box-shadow: 0 4px 24px rgba(220, 38, 38, 0.08);
}

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

.site-header h1 {
  margin: 0;
  font-size: 1.75rem;
  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: var(--radius);
  transition: background-color var(--transition), color var(--transition), box-shadow var(--transition);
  border-bottom: none;
  font-size: 1rem;
}

.site-nav a:hover {
  background-color: var(--color-surface);
  color: var(--color-secondary);
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.1);
}

.site-main {
  flex: 1;
  padding: var(--spacing-xl) 0;
}

.site-footer {
  background: linear-gradient(180deg, rgba(254, 242, 242, 0.5), rgba(254, 242, 242, 0.9));
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

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

.breadcrumbs {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm);
  background: rgba(254, 242, 242, 0.5);
  border-radius: var(--radius);
  font-size: 0.95rem;
}

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

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

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

.card {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
}

.card:hover {
  box-shadow: 0 8px 32px rgba(220, 38, 38, 0.12);
  transform: translateY(-2px);
  border-color: var(--color-accent);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-md) 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

table thead {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
}

table th {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  font-weight: 700;
  letter-spacing: 0.02em;
}

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

table tbody tr {
  transition: background-color var(--transition);
}

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

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

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

details {
  margin: var(--spacing-md) 0;
  background: rgba(254, 242, 242, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-sm);
  transition: box-shadow var(--transition);
}

details:hover {
  box-shadow: 0 4px 16px rgba(220, 38, 38, 0.08);
}

details[open] {
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 4px 24px rgba(220, 38, 38, 0.1);
}

summary {
  cursor: pointer;
  font-weight: 700;
  padding: var(--spacing-sm);
  color: var(--color-primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition);
}

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

summary::after {
  content: '+';
  font-size: 1.5rem;
  transition: transform var(--transition);
}

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

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

details > *:not(summary) {
  padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) var(--spacing-md);
  animation: slideDown 0.2s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

button, input, select, textarea {
  font-family: var(--font-main);
  font-size: 1rem;
}

button {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border: none;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 700;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.2);
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.3);
}

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

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

input, select, textarea {
  padding: var(--spacing-sm);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color var(--transition), box-shadow var(--transition);
}

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

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

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

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

code {
  background: var(--color-surface);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.9em;
  color: var(--color-secondary);
}

pre {
  background: var(--color-surface);
  padding: var(--spacing-md);
  border-radius: var(--radius);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
  border: 1px solid var(--color-border);
}

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

hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  margin: var(--spacing-lg) 0;
}

@media (min-width: 768px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

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

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

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

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

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

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

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

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

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

@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;
  }

  .card {
    border: 1px solid #000;
    box-shadow: none;
    page-break-inside: avoid;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  body {
    background: white;
  }
}