/* CSS Variables for Clean Corporate Design */
:root {
  /* Colors */
  --color-primary: #1e40af;
  --color-secondary: #059669;
  --color-background: #ffffff;
  --color-footer-bg: #1f2937;
  --color-button: #1e40af;
  --color-text-primary: #111827;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;
  --color-border-light: #e5e7eb;
  --color-border-medium: #d1d5db;
  --color-section-light: #f9fafb;
  --color-section-medium: #f3f4f6;
  
  /* Typography */
  --font-family-primary: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-family-secondary: 'Source Sans Pro', 'Arial', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.125rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
}

/* Base Typography & Reset */
* {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-background);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-primary);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin: 0 0 var(--spacing-md) 0;
  letter-spacing: -0.025em;
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-xl);
}

h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

h6 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

p {
  margin: 0 0 var(--spacing-md) 0;
  color: var(--color-text-secondary);
}

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

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

/* Focus states for accessibility */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Clean Layout Components */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section:nth-child(even) {
  background-color: var(--color-section-light);
}

.section:nth-child(3n) {
  background-color: var(--color-section-medium);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-cols-1 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Responsive Grid */
@media (min-width: 768px) {
  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  
  .md\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  
  .md\:grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Clean Corporate Header */
.header {
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--spacing-lg) 0;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
}

.nav {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  margin: 0;
  padding: 0;
}

.nav a {
  color: var(--color-text-primary);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

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

/* Clean Corporate Cards */
.card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  border-color: var(--color-border-medium);
  box-shadow: var(--shadow-md);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.card-content {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.card-footer {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}

/* Clean Corporate Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  min-height: 44px; /* Accessibility */
}

.btn-primary {
  background-color: var(--color-button);
  color: white;
  border-color: var(--color-button);
}

.btn-primary:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: white;
  border-color: var(--color-secondary);
}

.btn-secondary:hover {
  background-color: #047857;
  border-color: #047857;
  color: white;
  text-decoration: none;
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: white;
  text-decoration: none;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--color-section-light);
  color: var(--color-text-primary);
  text-decoration: none;
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
  min-height: 36px;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-lg);
  min-height: 52px;
}

/* Forms - Clean Corporate Style */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text-primary);
  background-color: var(--color-background);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
  outline: none;
}

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

.form-error {
  color: #dc2626;
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

.form-help {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

/* Corporate Footer */
.footer {
  background-color: var(--color-footer-bg);
  color: #d1d5db;
  padding: var(--spacing-3xl) 0 var(--spacing-xl) 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  color: white;
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
}

.footer-section p,
.footer-section a {
  color: #d1d5db;
  line-height: 1.6;
}

.footer-section a:hover {
  color: white;
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: var(--spacing-xl);
  text-align: center;
  color: #9ca3af;
  font-size: var(--font-size-sm);
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.font-bold {
  font-weight: 700;
}

.font-semibold {
  font-weight: 600;
}

.font-medium {
  font-weight: 500;
}

.text-primary {
  color: var(--color-primary);
}

.text-secondary {
  color: var(--color-text-secondary);
}

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

.bg-primary {
  background-color: var(--color-primary);
}

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

.bg-light {
  background-color: var(--color-section-light);
}

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.hidden {
  display: none;
}

.block {
  display: block;
}

.inline-block {
  display: inline-block;
}

.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

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

.w-full {
  width: 100%;
}

.max-w-sm {
  max-width: 24rem;
}

.max-w-md {
  max-width: 28rem;
}

.max-w-lg {
  max-width: 32rem;
}

.max-w-xl {
  max-width: 36rem;
}

.max-w-2xl {
  max-width: 42rem;
}

/* Hero Section - Clean Corporate */
.hero {
  padding: var(--spacing-3xl) 0;
  text-align: center;
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-section-light) 100%);
}

.hero h1 {
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-lg);
}

.hero p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-xl) auto;
}

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary {
  background-color: rgba(30, 64, 175, 0.1);
  color: var(--color-primary);
}

.badge-secondary {
  background-color: rgba(5, 150, 105, 0.1);
  color: var(--color-secondary);
}

/* Clean Corporate Table */
.table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
}

.table th,
.table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.table th {
  font-weight: 600;
  color: var(--color-text-primary);
  background-color: var(--color-section-light);
}

.table tbody tr:hover {
  background-color: var(--color-section-light);
}

/* Alert/Notification Styles */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  border: 1px solid;
}

.alert-success {
  background-color: rgba(5, 150, 105, 0.1);
  border-color: var(--color-secondary);
  color: #065f46;
}

.alert-error {
  background-color: rgba(220, 38, 38, 0.1);
  border-color: #dc2626;
  color: #991b1b;
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.1);
  border-color: #f59e0b;
  color: #92400e;
}

.alert-info {
  background-color: rgba(30, 64, 175, 0.1);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Responsive Utilities */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  h1 {
    font-size: var(--font-size-3xl);
  }
  
  h2 {
    font-size: var(--font-size-2xl);
  }
  
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
  
  .header-content {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .nav {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .hero {
    padding: var(--spacing-2xl) 0;
  }
  
  .hero p {
    font-size: var(--font-size-base);
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .btn,
  .nav {
    display: none;
  }
  
  .section {
    padding: 0;
    break-inside: avoid;
  }
  
  .card {
    border: 1px solid #000;
    break-inside: avoid;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --color-border-light: #000000;
    --color-border-medium: #000000;
    --color-text-secondary: #000000;
  }
  
  .card {
    border-width: 2px;
  }
  
  .btn {
    border-width: 2px;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Dark Mode Support (optional enhancement) */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #1f2937;
    --color-text-primary: #f9fafb;
    --color-text-secondary: #d1d5db;
    --color-text-muted: #9ca3af;
    --color-section-light: #374151;
    --color-section-medium: #4b5563;
    --color-border-light: #4b5563;
    --color-border-medium: #6b7280;
  }
}

/* Clean Corporate-specific components */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  margin: var(--spacing-2xl) 0;
}

.stat-item {
  text-align: center;
  padding: var(--spacing-lg);
}

.stat-number {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: var(--spacing-xl) 0;
}

.feature-list li {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

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

.feature-list li::before {
  content: "✓";
  color: var(--color-secondary);
  font-weight: bold;
  font-size: var(--font-size-lg);
}

/* Content specific styling for Russian language */
.content h2 {
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.content ul,
.content ol {
  padding-left: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.content blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

/* Final responsive touch */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .card {
    padding: var(--spacing-lg);
  }
  
  .hero p {
    font-size: var(--font-size-sm);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}


/* Cookie Banner Additional Styles for Tailwind */
.cookie-banner-hover-effect:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

@media (prefers-reduced-motion: reduce) {
    .cookie-banner-hover-effect:hover {
        transform: none;
    }
}