* {
  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: 'Verdana', 'Geneva', 'Tahoma', sans-serif;
  --max-width: 1100px;
  --radius: 8px;
  --transition: 0.2s ease;
}

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

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 1fr;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-text);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2rem;
  margin-top: 2rem;
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.5rem;
  margin-top: 1.5rem;
}

h4 {
  font-size: 1.25rem;
  margin-top: 1.25rem;
}

h5 {
  font-size: 1.125rem;
  margin-top: 1rem;
}

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

p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition), background-color var(--transition);
}

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

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

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

em {
  font-style: italic;
}

blockquote {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  border-left: 4px solid var(--color-primary);
  background: rgba(220, 38, 38, 0.05);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  font-style: italic;
  color: var(--color-text-muted);
}

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

.site-header {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.site-header .container {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 2rem;
  padding: 1rem 1.5rem;
}

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

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

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

.site-nav {
  justify-self: end;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.site-nav a {
  color: var(--color-text);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  transition: background-color var(--transition), color var(--transition);
}

.site-nav a:hover {
  background-color: var(--color-surface);
  color: var(--color-primary);
  text-decoration: none;
}

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

.site-main {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

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

.breadcrumbs {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

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

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

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

.card {
  background: rgba(254, 242, 242, 0.6);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: 0 8px 24px rgba(220, 38, 38, 0.1);
  transform: translateY(-2px);
  border-color: var(--color-accent);
}

.card h2 {
  margin-top: 0;
  color: var(--color-primary);
}

.card h3 {
  margin-top: 0;
  color: var(--color-secondary);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

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

table th {
  padding: 1rem;
  text-align: left;
  font-weight: 700;
  border-bottom: 2px solid var(--color-secondary);
}

table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

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

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

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

details {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
  transition: box-shadow var(--transition), border-color var(--transition);
}

details:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.08);
}

details[open] {
  border-color: var(--color-primary);
  box-shadow: 0 6px 16px rgba(220, 38, 38, 0.12);
}

summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-primary);
  padding: 0.5rem;
  border-radius: var(--radius);
  transition: background-color var(--transition), color var(--transition);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 700;
  transition: transform var(--transition);
}

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 > *:not(summary) {
  margin-top: 1rem;
  padding-left: 0.5rem;
}

.site-footer {
  background: rgba(28, 25, 23, 0.95);
  backdrop-filter: blur(16px);
  color: var(--color-surface);
  margin-top: 4rem;
  border-top: 3px solid var(--color-primary);
}

.site-footer .container {
  padding: 2rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

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

.site-footer a:hover {
  color: white;
}

.site-footer p {
  margin-bottom: 0.5rem;
  color: var(--color-surface);
}

.site-footer h3 {
  color: white;
  margin-top: 0;
  font-size: 1.125rem;
}

input[type="text"],
input[type="email"],
input[type="search"],
textarea,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-main);
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  transition: border-color var(--transition), box-shadow var(--transition);
}

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);
}

button,
.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
}

button:hover,
.button:hover {
  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.3);
  transform: translateY(-2px);
  text-decoration: none;
}

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

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

ul:not(.site-nav ul) {
  margin: 1rem 0;
  padding-left: 2rem;
}

ol {
  margin: 1rem 0;
  padding-left: 2rem;
}

li {
  margin-bottom: 0.5rem;
}

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

code {
  background: rgba(220, 38, 38, 0.1);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
  color: var(--color-secondary);
}

pre {
  background: rgba(28, 25, 23, 0.05);
  backdrop-filter: blur(8px);
  padding: 1.5rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
  color: var(--color-text);
}

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

figure {
  margin: 1.5rem 0;
}

figcaption {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
  text-align: center;
  font-style: italic;
}

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

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .site-header .container {
    padding: 1.25rem 2rem;
  }

  .site-header h1 {
    font-size: 1.75rem;
  }

  .site-nav ul {
    gap: 2rem;
  }

  .site-main {
    padding: 3rem 2rem;
  }

  .site-footer .container {
    grid-template-columns: repeat(2, 1fr);
    padding: 3rem 2rem;
  }

  .card {
    padding: 2rem;
  }

  table th,
  table td {
    padding: 1rem 1.25rem;
  }
}

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

  .site-header .container {
    padding: 1.5rem 2.5rem;
  }

  .site-header h1 {
    font-size: 2rem;
  }

  .site-nav ul {
    gap: 2.5rem;
  }

  .site-main {
    padding: 4rem 2.5rem;
  }

  .site-footer .container {
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    padding: 4rem 2.5rem;
  }

  .card {
    padding: 2.5rem;
  }

  details {
    padding: 1.5rem;
  }

  blockquote {
    padding: 1.5rem 2rem;
  }
}

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

  .card:hover {
    transform: none;
  }

  button:hover,
  .button:hover {
    transform: none;
  }

  summary::after {
    transition: none;
  }

  details[open] summary::after {
    transform: none;
  }
}

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

  body {
    display: block;
  }

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

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

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

  table {
    page-break-inside: avoid;
  }

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