/**
 * Flex Izulet - Design DNA: D-00FD6F-02
 * Color System: color-soft-blue
 * Typography: type-compact-reference
 * Layout: layout-asymmetric-editorial
 * Nav: nav-sticky-compact
 * Cards: cards-flat-editorial
 * Sections: sections-full-bleed
 * Density: density-medium-high
 */

:root {
  /* Typography Variables */
  --font-sans: 'SF Pro Text', 'Segoe UI', system-ui, sans-serif;
  --font-serif: ui-serif, serif;
  --font-mono: ui-monospace, monospace;

  /* Color System: color-soft-blue */
  --color-bg: #F4F7FA;
  --color-surface: #FFFFFF;
  --color-text-primary: #1B2A49;
  --color-text-secondary: #5A6B8A;
  --color-accent: #3B82F6;
  --color-border: #D1DBE8;
  --color-muted-bg: #E9F0F7;
  --color-interactive: #2563EB;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;

  /* Spacing Tokens (Medium High Density) */
  --space-2xs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Layout Boundaries */
  --container-max: 1200px;
  --reading-max: 760px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --transition-fast: 0.15s ease-in-out;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-size: 0.875rem; /* 14px compact default, scales up */
  line-height: 1.5;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

/* Typographic Scale (type-compact-reference) */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  letter-spacing: -0.015em;
}

h1 {
  font-size: 2rem;
  line-height: 1.25;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: 1.5rem;
  line-height: 1.25;
  font-weight: 600;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

h3 {
  font-size: 1.25rem;
  line-height: 1.25;
  font-weight: 600;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-xs);
}

p {
  font-size: 0.875rem;
  line-height: 1.5;
  font-weight: 400;
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

p.lead {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
  font-weight: 400;
}

a {
  color: var(--color-interactive);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

a:hover {
  color: #1D4ED8;
}

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--color-interactive);
  outline-offset: 2px;
}

img, table, video, iframe, canvas, svg {
  max-width: 100%;
  height: auto;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-text-primary);
  color: var(--color-surface);
  padding: var(--space-xs) var(--space-md);
  z-index: 9999;
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

/* Canonical semantic tags global layout */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-fast), padding var(--transition-fast);
  width: 100%;
}

header.header-scrolled {
  box-shadow: 0 4px 12px rgba(27, 42, 73, 0.06);
}

.header-top {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-sm) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrapper {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

.nav-toggle-btn {
  display: none;
  background: var(--color-muted-bg);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  padding: 6px 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

nav {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg) var(--space-xs);
}

.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.nav-list li a {
  display: inline-block;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-list li a:hover,
.nav-list li a.active {
  color: var(--color-text-primary);
  background-color: var(--color-muted-bg);
}

.nav-list li.nav-cta-link {
  margin-left: auto;
}

.nav-list li a.nav-cta-btn {
  background-color: var(--color-accent);
  color: #FFFFFF !important;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav-list li a.nav-cta-btn:hover {
  background-color: var(--color-interactive);
}

/* Sections Full Bleed Layout */
section {
  width: 100%;
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--color-border);
}

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

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

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

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

/* Asymmetric Editorial Hero & Layout */
.layout-asymmetric {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.layout-asymmetric-wide {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--space-2xl);
  align-items: start;
}

.asymmetric-sidebar {
  position: sticky;
  top: 90px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
}

.asymmetric-main {
  max-width: 100%;
}

/* Hero Statistical (hero-statistical) */
.hero-statistical-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-interactive);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-top: var(--space-2xs);
}

.hero-desc {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--color-text-primary);
  max-width: 800px;
}

/* Cards Flat Editorial (cards-flat-editorial) */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.cards-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.card-editorial {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.card-editorial:hover {
  border-color: var(--color-accent);
}

.card-meta {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
  letter-spacing: 0.05em;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  line-height: 1.3;
}

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

.card-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-interactive);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-link:hover {
  text-decoration: underline;
}

/* Conversion Bridge Block (блок-міст) */
.bridge-box {
  background: linear-gradient(135deg, #FFFFFF 0%, #E9F0F7 100%);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin: var(--space-2xl) 0;
  position: relative;
}

.bridge-tag {
  display: inline-block;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.bridge-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.bridge-text {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-lg);
  max-width: 750px;
}

.bridge-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-interactive);
  color: #FFFFFF !important;
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  min-height: 48px;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.bridge-btn:hover {
  background-color: #1D4ED8;
  transform: translateY(-1px);
}

/* Article Step-by-Step Styling */
.article-container {
  max-width: var(--reading-max);
  margin: 0 auto;
}

.article-header {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.article-meta-row {
  display: flex;
  gap: var(--space-md);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  flex-wrap: wrap;
}

.article-step {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
}

.step-num {
  width: 36px;
  height: 36px;
  background: var(--color-muted-bg);
  border: 1px solid var(--color-border);
  color: var(--color-interactive);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  font-size: 1rem;
}

.step-body {
  flex-grow: 1;
}

.step-body h3 {
  margin-top: 0;
  font-size: 1.1rem;
}

.callout-box {
  background-color: var(--color-muted-bg);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: var(--space-lg) 0;
}

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

/* Checklist / Form Styling */
.checklist-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin: var(--space-lg) 0;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  background: var(--color-surface);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.checklist-item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  cursor: pointer;
  accent-color: var(--color-interactive);
}

.checklist-label {
  font-size: 0.875rem;
  line-height: 1.4;
  color: var(--color-text-primary);
}

.result-card {
  background: var(--color-surface);
  border: 2px solid var(--color-interactive);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  margin-top: var(--space-lg);
}

/* Comparison Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: var(--space-lg) 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  text-align: left;
}

th, td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

th {
  background-color: var(--color-muted-bg);
  color: var(--color-text-primary);
  font-weight: 600;
}

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

/* Order Page Layout & Pricing Cards */
.order-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.product-image-container {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  margin-bottom: var(--space-lg);
}

.product-image-container img {
  border-radius: var(--radius-sm);
  max-height: 380px;
  object-fit: cover;
  width: 100%;
}

.pricing-tiers {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.pricing-card {
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pricing-card:hover {
  border-color: var(--color-accent);
}

.pricing-card.selected {
  border-color: var(--color-interactive);
  background-color: var(--color-muted-bg);
}

.tier-title {
  font-weight: 600;
  font-size: 1rem;
}

.tier-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.tier-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-interactive);
  text-align: right;
}

.tier-badge {
  background: #10B981;
  color: #fff;
  font-size: 0.6875rem;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  display: inline-block;
  margin-bottom: 4px;
}

/* Forms */
.lead-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: var(--space-2xs);
  color: var(--color-text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.875rem;
  background: #FFFFFF;
}

.form-group input.field-error {
  border-color: #DC2626;
  background-color: #FEF2F2;
}

.submit-btn {
  width: 100%;
  background-color: var(--color-interactive);
  color: #FFFFFF;
  border: none;
  padding: 14px 20px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  min-height: 48px;
  transition: background var(--transition-fast);
}

.submit-btn:hover {
  background-color: #1D4ED8;
}

/* Footer Editorial */
footer {
  background-color: var(--color-text-primary);
  color: #E2E8F0;
  padding: var(--space-3xl) 0 var(--space-xl);
  border-top: 1px solid #2D3D5E;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.footer-col p {
  color: #94A3B8;
  font-size: 0.8125rem;
  line-height: 1.6;
}

.footer-col a {
  color: #CBD5E1;
  text-decoration: none;
}

.footer-col a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer-links li a {
  font-size: 0.8125rem;
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid #2D3D5E;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: #94A3B8;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .layout-asymmetric,
  .layout-asymmetric-wide,
  .order-layout {
    grid-template-columns: 1fr;
  }
  .asymmetric-sidebar {
    position: static;
  }
  .cards-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-top {
    padding: var(--space-sm) var(--space-md);
  }
  .nav-toggle-btn {
    display: block;
  }
  nav {
    display: none;
    padding: var(--space-md);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
  }
  nav.nav-open {
    display: block;
  }
  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }
  .nav-list li {
    width: 100%;
  }
  .nav-list li a {
    display: block;
    width: 100%;
    padding: 10px;
  }
  .nav-list li.nav-cta-link {
    margin-left: 0;
    margin-top: var(--space-xs);
  }
  .hero-stats-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .cards-grid,
  .cards-grid-3,
  .cards-grid-2 {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .stat-num {
    font-size: 2rem;
  }
  h1 {
    font-size: 1.65rem;
  }
  h2 {
    font-size: 1.35rem;
  }
}