/* ==========================================================================
   EYEWEARPORTAL DESIGN SYSTEM
   DNA ID: D-015630-02 (archetype-content-sales-funnel)
   Layout: Swiss Grid (12-column, mathematically rigorous, left-aligned)
   Color System: color-olive-cream
   Typography: type-compact-reference
   Card System: cards-bordered
   CTA System: cta-contextual
   Navigation: nav-wide-multirow
   ========================================================================== */

:root {
  /* Color Palette: color-olive-cream */
  --bg-color: #F7F8F3;
  --surface-color: #FFFFFF;
  --text-primary: #2C3322;
  --text-secondary: #606655;
  --accent-color: #65A30D;
  --border-color: #DFE5D3;
  --muted-bg: #EFF2E6;
  --interactive-color: #4D7C0F;

  /* Typography: type-compact-reference */
  --font-sans: 'SF Pro Text', 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  --font-serif: ui-serif, Georgia, Cambria, 'Times New Roman', serif;
  --font-mono: ui-monospace, 'SFMono-Regular', Menlo, Monaco, Consolas, monospace;

  /* Spatial & Grid Tokens */
  --container-max: 1200px;
  --gutter: 24px;
  --gutter-lg: 32px;
  --radius-sharp: 2px;
  --radius-card: 4px;
  --transition-fast: 0.18s ease;
  --transition-normal: 0.25s ease;
}

/* Bulletproof Global Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  overflow-x: hidden;
  width: 100%;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-color);
}

body {
  font-family: var(--font-sans);
  font-size: 0.875rem; /* 14px compact reference */
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Accessibility: Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 1rem;
  background: var(--text-primary);
  color: #FFFFFF;
  padding: 0.5rem 1rem;
  z-index: 10000;
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius-sharp);
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: 1rem;
  outline: 2px solid var(--accent-color);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.015em;
  text-align: left;
}

h1 {
  font-size: 2rem;
  line-height: 1.25;
  margin-bottom: 1rem;
}

h2 {
  font-size: 1.5rem;
  line-height: 1.25;
  margin-bottom: 0.875rem;
}

h3 {
  font-size: 1.25rem;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

h4 {
  font-size: 1rem;
  line-height: 1.35;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1.15rem;
  color: var(--text-primary);
  line-height: 1.6;
  max-width: 75ch; /* Optical line length */
}

p.lead {
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

a {
  color: var(--interactive-color);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--accent-color);
}
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

img, picture, video {
  max-width: 100%;
  height: auto;
  display: block;
}

svg {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

/* ==========================================================================
   RAW SEMANTIC LAYOUT CONTAINERS
   ========================================================================== */

/* Header - nav-wide-multirow */
header {
  width: 100%;
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-utility-row {
  background-color: var(--muted-bg);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.75rem;
  padding: 0.35rem 0;
  color: var(--text-secondary);
}

.header-utility-content {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.utility-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 500;
}

.utility-nav {
  display: flex;
  gap: 1.25rem;
  list-style: none;
}
.utility-nav a {
  color: var(--text-secondary);
  text-decoration: none;
}
.utility-nav a:hover {
  color: var(--text-primary);
}

/* Primary Header Row */
.header-main-row {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0.85rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand-link svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}
.brand-domain {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-secondary);
  display: block;
  margin-top: -3px;
}

/* Navigation - Raw Semantic nav */
nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.4rem 0.2rem;
  position: relative;
  transition: color var(--transition-fast);
}
.nav-links a:hover, .nav-links a[aria-current="page"] {
  color: var(--interactive-color);
}
.nav-links a[aria-current="page"]::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-color);
}

/* Header Standout CTA Button */
.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--accent-color);
  color: #FFFFFF !important;
  text-decoration: none !important;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sharp);
  border: 1px solid var(--interactive-color);
  min-height: 44px;
  min-width: 44px;
  white-space: nowrap;
  box-shadow: 0 1px 2px rgba(44, 51, 34, 0.1);
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
}
.btn-cta:hover {
  background-color: var(--interactive-color);
  transform: translateY(-1px);
  box-shadow: 0 3px 6px rgba(44, 51, 34, 0.15);
}
.btn-cta:active {
  transform: translateY(0);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--surface-color);
  color: var(--text-primary) !important;
  text-decoration: none !important;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sharp);
  border: 1px solid var(--border-color);
  min-height: 44px;
  min-width: 44px;
  white-space: nowrap;
  transition: all var(--transition-fast);
  cursor: pointer;
}
.btn-secondary:hover {
  background-color: var(--muted-bg);
  border-color: var(--text-secondary);
}

/* Mobile Nav Toggle */
.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  padding: 0.5rem;
  border-radius: var(--radius-sharp);
  cursor: pointer;
  color: var(--text-primary);
  min-height: 44px;
  min-width: 44px;
}

/* Main Content Area */
main {
  width: 100%;
  min-height: calc(100vh - 350px);
}

/* Section Architecture (Sections Comparison & Swiss Grid) */
section {
  width: 100%;
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-color);
  position: relative;
}

section.bg-surface {
  background-color: var(--surface-color);
}
section.bg-muted {
  background-color: var(--muted-bg);
}
section.bg-alt {
  background-color: #F1F4E9;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Article Styling (Article Reference) */
article {
  max-width: 820px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 0.75rem;
  align-items: center;
}

.article-toc {
  background-color: var(--muted-bg);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  margin-bottom: 2.5rem;
  border-radius: var(--radius-card);
}
.article-toc h3 {
  font-size: 1.05rem;
  margin-bottom: 0.75rem;
}
.article-toc ol {
  padding-left: 1.25rem;
  margin: 0;
}
.article-toc li {
  margin-bottom: 0.5rem;
}
.article-toc a {
  text-decoration: none;
  color: var(--text-primary);
}
.article-toc a:hover {
  color: var(--interactive-color);
  text-decoration: underline;
}

/* Swiss 12-Column Grid System */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gutter);
  align-items: start;
}

.col-12 { grid-column: span 12; }
.col-8  { grid-column: span 8; }
.col-7  { grid-column: span 7; }
.col-6  { grid-column: span 6; }
.col-5  { grid-column: span 5; }
.col-4  { grid-column: span 4; }
.col-3  { grid-column: span 3; }

/* Cards Bordered Component */
.card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  height: 100%;
}
.card:hover {
  border-color: var(--interactive-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(44, 51, 34, 0.06);
}

.card-tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--interactive-color);
  margin-bottom: 0.5rem;
}

.card h3 {
  margin-bottom: 0.75rem;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.card .card-action {
  margin-top: auto;
  font-weight: 600;
  font-size: 0.8125rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Callout & Pull Quote Blocks */
.callout {
  border-left: 3px solid var(--accent-color);
  background-color: var(--muted-bg);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
}
.callout h4 {
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}
.callout p:last-child {
  margin-bottom: 0;
}

.pull-quote {
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1.75rem 0;
  margin: 2.25rem 0;
  font-size: 1.15rem;
  line-height: 1.45;
  font-style: italic;
  color: var(--text-primary);
}
.pull-quote cite {
  display: block;
  font-size: 0.8125rem;
  font-style: normal;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  font-weight: 600;
}

/* Comparison Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 1.75rem 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  background-color: var(--surface-color);
}
table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}
th, td {
  padding: 0.85rem 1.15rem;
  border-bottom: 1px solid var(--border-color);
}
th {
  background-color: var(--muted-bg);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
tr:last-child td {
  border-bottom: none;
}
tr:hover td {
  background-color: #FAFAF7;
}

/* Conversion Bridge Block (Блок-міст) */
.conversion-bridge {
  background-color: var(--muted-bg);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 2.5rem;
  margin: 3.5rem 0 1rem;
  position: relative;
}
.conversion-bridge::before {
  content: 'РЕКОМЕНДАЦИЯ РЕДАКЦИИ ЭКСПЕРТОВ';
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--interactive-color);
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sharp);
  margin-bottom: 1rem;
}
.bridge-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
}
.bridge-content h3 {
  font-size: 1.35rem;
  margin-bottom: 0.65rem;
}
.bridge-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.9375rem;
}
.bridge-benefits {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  list-style: none;
  padding: 0;
  margin-bottom: 0;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
}
.bridge-benefits li {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Order Page Layout & Pricing Tiers */
.product-visual-wrapper {
  border: 1px solid var(--border-color);
  background-color: var(--surface-color);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(44, 51, 34, 0.08);
}
.product-visual-wrapper img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  object-position: center;
  display: block;
}
.product-badge-overlay {
  padding: 1rem 1.25rem;
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
}

.pricing-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin: 2rem 0;
}
.pricing-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.pricing-card.popular {
  border-color: var(--accent-color);
  box-shadow: 0 4px 16px rgba(101, 163, 13, 0.15);
}
.pricing-card.popular::before {
  content: 'НАИБОЛЕЕ ВЫГОДНЫЙ ВЫБОР';
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent-color);
  color: #FFFFFF;
  font-size: 0.625rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 10px;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.pricing-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.pricing-price {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--interactive-color);
  margin-bottom: 0.25rem;
}
.pricing-old {
  font-size: 0.875rem;
  text-decoration: line-through;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}
.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem;
  font-size: 0.8125rem;
  flex-grow: 1;
}
.pricing-features li {
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--border-color);
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}
.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.8125rem;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}
.form-control {
  width: 100%;
  padding: 0.75rem 0.95rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-primary);
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sharp);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-control:focus {
  border-color: var(--interactive-color);
  box-shadow: 0 0 0 3px rgba(101, 163, 13, 0.2);
  outline: none;
}
.form-help {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.3rem;
}

/* FAQ Details / Summary */
details {
  border-bottom: 1px solid var(--border-color);
  padding: 1.15rem 0;
}
details summary {
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
details summary::-webkit-details-marker {
  display: none;
}
details summary::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--interactive-color);
  font-weight: 400;
  margin-left: 1rem;
}
details[open] summary::after {
  content: '−';
}
details .faq-content {
  padding-top: 0.85rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Interactive Checklist styles */
.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  border-radius: var(--radius-card);
  cursor: pointer;
}
.checklist-item input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.15rem;
  cursor: pointer;
  accent-color: var(--accent-color);
}
.checklist-item.checked {
  background-color: #F3F7EB;
  border-color: var(--accent-color);
}

/* Footer - footer-large-multicolumn */
footer {
  width: 100%;
  background-color: var(--text-primary);
  color: #DDE2D1;
  border-top: 3px solid var(--accent-color);
  padding: 4.5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col p {
  color: #B5BCAB;
  font-size: 0.8125rem;
  line-height: 1.6;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 0.65rem;
}
.footer-links a {
  color: #DDE2D1;
  text-decoration: none;
  font-size: 0.8125rem;
  transition: color var(--transition-fast);
}
.footer-links a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid #3F4733;
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.75rem;
  color: #8C947F;
}
.footer-legal-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}
.footer-legal-links a {
  color: #B5BCAB;
  text-decoration: none;
}
.footer-legal-links a:hover {
  color: #FFFFFF;
}

/* Breadcrumbs */
.breadcrumbs {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}
.breadcrumbs a {
  color: var(--text-secondary);
  text-decoration: none;
}
.breadcrumbs a:hover {
  text-decoration: underline;
}
.breadcrumbs span {
  color: var(--border-color);
}

/* ==========================================================================
   RESPONSIVE DESIGN & MOBILE LARGE TYPE
   ========================================================================== */

@media (max-width: 1024px) {
  .grid-12 {
    grid-template-columns: repeat(6, 1fr);
  }
  .col-8, .col-7, .col-6, .col-5 { grid-column: span 6; }
  .col-4, .col-3 { grid-column: span 3; }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .pricing-cards {
    grid-template-columns: 1fr;
  }
  .product-visual-wrapper img {
    height: 380px;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 1rem; /* Mobile Large Type requirement */
  }
  h1 {
    font-size: 1.65rem;
  }
  h2 {
    font-size: 1.35rem;
  }
  
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  nav .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--surface-color);
    padding: 1.5rem var(--gutter);
    border-bottom: 2px solid var(--border-color);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    gap: 1rem;
    align-items: flex-start;
  }
  nav .nav-links.active {
    display: flex;
  }
  .nav-links a {
    font-size: 1.05rem;
    padding: 0.65rem 0;
    width: 100%;
    border-bottom: 1px solid var(--muted-bg);
  }

  .header-utility-row {
    display: none;
  }

  .grid-12 {
    grid-template-columns: 1fr;
  }
  .col-12, .col-8, .col-7, .col-6, .col-5, .col-4, .col-3 {
    grid-column: span 1;
  }

  .bridge-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .product-visual-wrapper img {
    height: 280px;
  }

  section {
    padding: 2.75rem 0;
  }
}

/* Accessibility: Reduced Motion */
@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;
  }
}