* {
  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;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-text);
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: 1rem;
}

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

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;
  color: var(--color-text);
}

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

blockquote {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  background: linear-gradient(135deg, rgba(254, 242, 242, 0.8), rgba(252, 165, 165, 0.1));
  backdrop-filter: blur(10px);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius);
  font-style: italic;
  color: var(--color-text-muted);
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.08);
}

.site-header {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(254, 242, 242, 0.9));
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 16px rgba(220, 38, 38, 0.06);
}

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

.site-nav {
  display: flex;
  gap: 2rem;
  align-items: center;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.site-nav a:hover {
  background-color: var(--color-surface);
  color: var(--color-primary);
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.1);
}

.site-nav a:focus-visible {
  background-color: var(--color-surface);
  box-shadow: 0 0 0 3px var(--color-accent);
}

.site-main {
  flex: 1;
  padding: 2rem 0;
}

.site-footer {
  background: linear-gradient(135deg, rgba(28, 25, 23, 0.97), rgba(153, 27, 27, 0.95));
  backdrop-filter: blur(16px);
  color: var(--color-bg);
  padding: 3rem 0 1.5rem;
  margin-top: 4rem;
  border-top: 1px solid var(--color-border);
}

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

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

.site-footer p {
  color: rgba(255, 255, 255, 0.85);
}

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

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  padding: 1rem 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

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

.breadcrumbs a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.breadcrumbs::before {
  content: '→';
  margin: 0 0.25rem;
  color: var(--color-border);
}

.breadcrumbs :first-child::before {
  display: none;
}

.card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(254, 242, 242, 0.7));
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 16px rgba(220, 38, 38, 0.08);
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: 0 8px 24px rgba(220, 38, 38, 0.15);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.card h2, .card h3 {
  color: var(--color-secondary);
  margin-top: 0;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(220, 38, 38, 0.06);
}

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

table th {
  padding: 1rem;
  text-align: left;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

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

table tbody tr:hover {
  background: linear-gradient(135deg, rgba(252, 165, 165, 0.15), rgba(254, 242, 242, 0.5));
  backdrop-filter: blur(8px);
}

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

details {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.85), rgba(254, 242, 242, 0.6));
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0;
  margin-bottom: 1rem;
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.05);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

details:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.1);
}

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

summary {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--color-secondary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s ease, background-color 0.2s ease;
  user-select: none;
}

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

summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  transition: transform 0.2s ease;
}

details[open] summary::after {
  content: '−';
  transform: rotate(180deg);
}

summary:hover {
  background: rgba(252, 165, 165, 0.15);
  color: var(--color-primary);
}

details div {
  padding: 0 1.5rem 1.25rem 1.5rem;
  color: var(--color-text);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin: 2rem 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin: 2rem 0;
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

.hero {
  background: linear-gradient(135deg, rgba(220, 38, 38, 0.05), rgba(153, 27, 27, 0.02));
  backdrop-filter: blur(20px);
  padding: 4rem 0;
  margin-bottom: 3rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  text-align: center;
}

.hero h1 {
  color: var(--color-secondary);
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto;
}

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-bg);
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-family: var(--font-main);
  font-size: 1rem;
  text-decoration: none;
  transition: box-shadow 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.2);
}

.btn:hover {
  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.35);
  transform: translateY(-2px);
  text-decoration: none;
}

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

.btn:active {
  transform: translateY(0);
}

.btn-secondary {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(254, 242, 242, 0.9));
  backdrop-filter: blur(8px);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.1);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-bg);
  border-color: var(--color-secondary);
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin: 3rem 0;
}

.feature-item {
  padding: 2rem;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.8), rgba(254, 242, 242, 0.6));
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-align: center;
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  box-shadow: 0 2px 10px rgba(220, 38, 38, 0.05);
}

.feature-item:hover {
  border-color: var(--color-primary);
  box-shadow: 0 8px 24px rgba(220, 38, 38, 0.15);
  transform: translateY(-4px);
}

.feature-item h3 {
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.sidebar-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin: 2rem 0;
}

.sidebar {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(254, 242, 242, 0.75));
  backdrop-filter: blur(12px);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 16px rgba(220, 38, 38, 0.08);
}

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

.sidebar ul {
  list-style: none;
  padding: 0;
}

.sidebar li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.sidebar li:last-child {
  border-bottom: none;
}

.sidebar a {
  display: block;
  padding: 0.5rem;
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.sidebar a:hover {
  background-color: var(--color-surface);
  text-decoration: none;
  padding-left: 1rem;
}

input, textarea, select {
  width: 100%;
  padding: 0.875rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-main);
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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);
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--color-text);
}

form {
  margin: 2rem 0;
}

.form-group {
  margin-bottom: 1.5rem;
}

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

.img-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.85), rgba(254, 242, 242, 0.7));
  backdrop-filter: blur(10px);
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.08);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.img-card:hover {
  box-shadow: 0 8px 24px rgba(220, 38, 38, 0.15);
  transform: scale(1.02);
}

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

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .sidebar-layout {
    grid-template-columns: 1fr 300px;
  }

  .hero {
    padding: 5rem 0;
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .site-nav {
    gap: 2.5rem;
  }

  .hero {
    padding: 6rem 0;
  }
}

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

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

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

  .card,
  .feature-item,
  .sidebar {
    box-shadow: none;
    border: 1px solid #000;
    background: #fff;
    backdrop-filter: none;
  }

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

  body {
    background: #fff;
    color: #000;
  }
}