/* ─── Typography & Fonts ─────────────────────────────────────────────── */
@import url('fonts/fonts.css');

:root {
  --font-serif: 'Piazzolla', serif;
  --font-sans: 'Manrope', sans-serif;

  --color-bg-main: #f8fafc;
  --color-bg-surface: #ffffff;
  --color-bg-secondary: #f1f5f9;
  --color-bg-tertiary: #e2e8f0;

  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;

  --color-accent-primary: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-subtle: #eff6ff;
  --color-accent-border: #bfdbfe;

  --color-border-subtle: rgba(15, 23, 42, 0.08);
  --color-border-medium: rgba(15, 23, 42, 0.16);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 24px -4px rgba(15, 23, 42, 0.08), 0 4px 8px -2px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 24px 48px -12px rgba(15, 23, 42, 0.12);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 9999px;

  --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ─── Reset & Base ────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--color-bg-main);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--color-bg-main);
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Focus styles for keyboard accessibility */
:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 3px;
}

/* ─── Container ───────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

@media (max-width: 640px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* ─── Header ──────────────────────────────────────────────────────────── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  transition: background-color var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth), padding var(--transition-smooth);
  background: rgba(248, 250, 252, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  padding: 18px 0;
}

.header.is-scrolled {
  background: rgba(255, 255, 255, 0.94);
  border-bottom-color: var(--color-border-subtle);
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
  padding: 12px 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: nowrap; /* Strictly single line! */
}

/* Brand Logo (Height >= 44px desktop, >= 32px mobile) */
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text-primary);
  height: 48px;
  flex-shrink: 0;
  transition: transform var(--transition-smooth), opacity var(--transition-smooth);
}

.brand-logo:hover {
  transform: translateY(-1px);
}

.brand-logo svg {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  fill: currentColor;
  transition: transform var(--transition-bounce);
}

.brand-logo:hover svg {
  transform: scale(1.05) rotate(2deg);
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  white-space: nowrap;
}

.brand-accent {
  color: var(--color-accent-primary);
}

/* Desktop Navigation */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-shrink: 1;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-smooth), transform var(--transition-smooth);
  position: relative;
  white-space: nowrap;
  padding: 6px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-accent-primary);
  border-radius: 2px;
  transition: width var(--transition-smooth);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-text-primary);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  width: 100%;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.btn-header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-text-primary);
  color: #ffffff;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  transition: background-color var(--transition-smooth), transform var(--transition-smooth), box-shadow var(--transition-smooth);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}

.btn-header-cta:hover {
  background-color: var(--color-accent-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-header-cta svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

/* Mobile Menu Button */
.btn-mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  border-radius: var(--radius-sm);
  background: var(--color-bg-secondary);
}

.btn-mobile-toggle svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
}

/* Mobile Navigation Drawer */
.mobile-nav {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border-medium);
  box-shadow: var(--shadow-xl);
  padding: 24px;
  flex-direction: column;
  gap: 16px;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition-smooth), opacity var(--transition-smooth), visibility var(--transition-smooth);
  z-index: 99;
}

.mobile-nav.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-link {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text-primary);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.mobile-nav-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 12px;
}

/* Responsive Header */
@media (max-width: 1024px) {
  .nav-desktop {
    display: none;
  }
  .btn-mobile-toggle {
    display: inline-flex;
  }
  .mobile-nav {
    display: flex;
  }
}

@media (max-width: 640px) {
  .header {
    padding: 12px 0;
  }
  .brand-logo {
    height: 36px;
  }
  .brand-logo svg {
    width: 32px;
    height: 32px;
  }
  .brand-name {
    font-size: 22px;
  }
  .btn-header-cta {
    display: none; /* Keep strictly 1 line on 360px */
  }
}

/* ─── Hero Section ────────────────────────────────────────────────────── */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 130px;
  padding-bottom: 90px;
  overflow: hidden;
  background: #ffffff;
}

#hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

/* Hero overlay - strictly max 25% opacity */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 60% 30%, rgba(255, 255, 255, 0.4) 0%, rgba(248, 250, 252, 0.8) 100%);
  opacity: 0.22;
  z-index: 2;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 10;
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  align-items: center;
  gap: 48px;
  min-width: 0;
  width: 100%;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
  width: 100%;
}

/* Nadzagolovok - simple text without capsule/dot */
.hero-pretitle {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 52px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text-primary);
  letter-spacing: -0.025em;
  margin-bottom: 24px;
}

.hero-title-accent {
  color: var(--color-accent-primary);
}

.hero-subtitle {
  font-size: 19px;
  line-height: 1.55;
  color: var(--color-text-secondary);
  margin-bottom: 36px;
  max-width: 580px;
}

/* Hero CTAs */
.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: var(--color-accent-primary);
  color: #ffffff;
  padding: 16px 32px;
  border-radius: var(--radius-pill);
  font-size: 16px;
  font-weight: 600;
  transition: background-color var(--transition-smooth), transform var(--transition-smooth), box-shadow var(--transition-smooth);
  box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -5px rgba(37, 99, 235, 0.45);
}

.btn-primary svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-medium);
  padding: 16px 28px;
  border-radius: var(--radius-pill);
  font-size: 16px;
  font-weight: 600;
  transition: background-color var(--transition-smooth), border-color var(--transition-smooth), transform var(--transition-smooth);
}

.btn-secondary:hover {
  background-color: #ffffff;
  border-color: var(--color-accent-primary);
  color: var(--color-accent-primary);
  transform: translateY(-2px);
}

.btn-secondary svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
}

/* Hero Visuals: Stacked Photo + Interactive Preview Card */
.hero-visuals {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
  width: 100%;
}

/* Bright Raster Image Card */
.hero-photo-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.9);
  background: #ffffff;
}

.hero-photo-img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  object-position: center;
  transition: transform var(--transition-smooth);
}

.hero-photo-card:hover .hero-photo-img {
  transform: scale(1.02);
}

.hero-photo-caption {
  position: absolute;
  bottom: 12px;
  left: 14px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  border: 1px solid rgba(15, 23, 42, 0.06);
}

/* Interactive Ad Preview Card */
.hero-preview-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-medium);
  box-shadow: var(--shadow-xl);
  padding: 24px;
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
}

.hero-preview-card:hover {
  box-shadow: 0 30px 60px -12px rgba(15, 23, 42, 0.14);
}

.hero-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.preview-badge-status {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent-primary);
  background: var(--color-accent-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}

.preview-variant-counter {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.hero-preview-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text-primary);
  margin-bottom: 10px;
}

.hero-preview-desc {
  font-size: 14px;
  line-height: 1.55;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.hero-preview-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.ad-tag {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.hero-preview-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--color-border-subtle);
}

.hero-dots-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-variant-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  transition: all var(--transition-smooth);
}

.hero-variant-dot:hover,
.hero-variant-dot.is-active {
  background: var(--color-accent-primary);
  color: #ffffff;
}

.hero-nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-variant-nav {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  transition: all var(--transition-smooth);
}

.btn-variant-nav:hover {
  background: var(--color-accent-primary);
  color: #ffffff;
}

.btn-variant-nav svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

.btn-copy-preview {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent-primary);
  background: var(--color-accent-subtle);
  border-radius: var(--radius-pill);
  transition: all var(--transition-smooth);
}

.btn-copy-preview:hover {
  background: var(--color-accent-primary);
  color: #ffffff;
}

.btn-copy-preview svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
}

.copy-status-tip {
  font-size: 12px;
  font-weight: 500;
  color: #16a34a;
  opacity: 0;
  transition: opacity 0.2s ease;
  position: absolute;
  right: 24px;
  bottom: 6px;
}

.copy-status-tip.is-visible {
  opacity: 1;
}

/* Responsive Hero */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
    min-width: 0;
    width: 100%;
  }
  .hero-content,
  .hero-visuals {
    min-width: 0;
    width: 100%;
    max-width: 100%;
  }
  .hero-title {
    font-size: 42px;
  }
  .hero-subtitle {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .hero-section {
    padding-top: 100px;
    padding-bottom: 60px;
  }
  .hero-title {
    font-size: 32px;
    word-break: break-word;
    overflow-wrap: break-word;
  }
  .hero-subtitle {
    font-size: 16px;
    word-break: break-word;
    overflow-wrap: break-word;
  }
  .hero-pretitle {
    word-break: break-word;
    overflow-wrap: break-word;
  }
  .hero-photo-img {
    height: 190px;
  }
  .hero-preview-card {
    padding: 16px;
  }
  .hero-preview-controls {
    flex-wrap: wrap;
    gap: 12px;
  }
  .btn-primary, .btn-secondary {
    width: 100%;
  }
}

/* ─── Section Shared Styles ───────────────────────────────────────────── */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 60px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 18px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

@media (max-width: 640px) {
  .section {
    padding: 70px 0;
  }
  .section-title {
    font-size: 30px;
  }
  .section-subtitle {
    font-size: 16px;
  }
}

/* ─── Section 1: «Как это работает» ───────────────────────────────────── */
/* Centered flex grid rule: incomplete row is always centered! */
.steps-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px;
}

.step-card {
  flex: 0 1 calc(33.333% - 20px);
  min-width: 280px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-medium);
}

.step-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  color: var(--color-accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: transform var(--transition-bounce);
}

.step-card:hover .step-icon-wrap {
  transform: scale(1.1);
}

.step-icon-wrap svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
}

.step-number {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent-primary);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.step-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.step-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

@media (max-width: 900px) {
  .step-card {
    flex: 0 1 calc(50% - 15px);
  }
}

@media (max-width: 600px) {
  .step-card {
    flex: 0 1 100%;
  }
}

/* ─── Section 2: «Что умеет генератор» (Signature Mosaic Grid) ────────── */
.mosaic-section {
  background: #ffffff;
}

/* Centered flex grid rule: incomplete row is always centered! */
.mosaic-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}

.mosaic-tile {
  background: var(--color-bg-main);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-subtle);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              background-color 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              flex-basis 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              flex-grow 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Asymmetric base mosaic layout: 2 tiles per row on desktop, incomplete rows centered */
.mosaic-tile-1 {
  flex: 0 1 calc(58.333% - 14px);
  min-width: 320px;
}

.mosaic-tile-2 {
  flex: 0 1 calc(41.667% - 14px);
  min-width: 280px;
}

.mosaic-tile-3 {
  flex: 0 1 calc(41.667% - 14px);
  min-width: 280px;
}

.mosaic-tile-4 {
  flex: 0 1 calc(58.333% - 14px);
  min-width: 320px;
}

/* Signature mosaic dynamic interaction: hover/focus expands tile and reflows neighbor in place */
@media (min-width: 1025px) {
  .mosaic-tile-1:hover,
  .mosaic-tile-1.is-active {
    flex-basis: calc(64% - 14px);
  }
  .mosaic-tile-2:hover,
  .mosaic-tile-2.is-active {
    flex-basis: calc(48% - 14px);
  }
  .mosaic-tile-3:hover,
  .mosaic-tile-3.is-active {
    flex-basis: calc(48% - 14px);
  }
  .mosaic-tile-4:hover,
  .mosaic-tile-4.is-active {
    flex-basis: calc(64% - 14px);
  }
}

.mosaic-tile:hover,
.mosaic-tile.is-active {
  background: #ffffff;
  border-color: var(--color-accent-border);
  box-shadow: var(--shadow-xl);
  transform: translateY(-3px);
}

.tile-icon-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.tile-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  color: var(--color-accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tile-icon svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
}

.tile-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.25;
}

.tile-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

/* Tile 1 Interactive Tabs */
.mosaic-tabs-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.mosaic-variant-tab {
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: #ffffff;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-subtle);
  transition: all var(--transition-smooth);
}

.mosaic-variant-tab:hover,
.mosaic-variant-tab.is-selected {
  background: var(--color-accent-primary);
  color: #ffffff;
  border-color: var(--color-accent-primary);
}

.mosaic-variant-content {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 18px;
  border: 1px solid var(--color-border-subtle);
}

.mosaic-variant-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.mosaic-variant-body {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Tile 2 Interactive SEO meter */
.seo-meter-box {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--color-border-subtle);
}

.seo-score-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.seo-score-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.seo-score-val {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-accent-primary);
}

.seo-progress-track {
  width: 100%;
  height: 8px;
  background: var(--color-bg-secondary);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 16px;
}

.seo-progress-fill {
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #1d4ed8);
  border-radius: 4px;
  transform-origin: left;
  transform: scaleX(0.91);
  transition: transform 0.4s ease;
}

.seo-chips-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.seo-interactive-chip {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  transition: all var(--transition-smooth);
}

.seo-interactive-chip.is-picked {
  background: var(--color-accent-subtle);
  color: var(--color-accent-primary);
  border-color: var(--color-accent-border);
}

/* Tile 3 Price Benchmark */
.price-benchmark-box {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--color-border-subtle);
}

.price-benchmark-pills {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.price-benchmark-pill {
  flex: 1;
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  padding: 8px 4px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  transition: all var(--transition-smooth);
}

.price-benchmark-pill.is-active {
  background: var(--color-accent-primary);
  color: #ffffff;
}

.price-snippet-box {
  background: var(--color-bg-main);
  padding: 14px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-accent-primary);
}

.price-snippet-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.price-snippet-desc {
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Tile 4 Quick Replies */
.replies-chips-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.reply-chip {
  font-size: 13px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  background: #ffffff;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-subtle);
  transition: all var(--transition-smooth);
}

.reply-chip:hover,
.reply-chip.is-active {
  background: var(--color-accent-subtle);
  color: var(--color-accent-primary);
  border-color: var(--color-accent-border);
}

.reply-preview-display {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid var(--color-border-subtle);
  font-size: 14px;
  color: var(--color-text-primary);
  line-height: 1.5;
  transition: background-color 0.3s ease;
}

.reply-preview-display.has-flash {
  background: var(--color-accent-subtle);
}

/* Responsive Mosaic Grid: centered layout on smaller screens */
@media (max-width: 1024px) {
  .mosaic-tile-1,
  .mosaic-tile-2,
  .mosaic-tile-3,
  .mosaic-tile-4 {
    flex: 0 1 100%;
    max-width: 680px;
    min-width: 0;
    width: 100%;
  }
}

/* ─── Section 3: «Лиды и сообщения» ───────────────────────────────────── */
.leads-section {
  background: var(--color-bg-secondary);
}

.leads-layout {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 40px;
  align-items: center;
}

.leads-features-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.lead-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: #ffffff;
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), border-color var(--transition-smooth);
}

.lead-feature-item:hover {
  transform: translateX(4px);
  border-color: var(--color-accent-border);
}

.lead-feature-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  color: var(--color-accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.lead-feature-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

.lead-feature-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.lead-feature-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Interactive Leads Simulation Card */
.leads-sim-card {
  background: #ffffff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-medium);
  box-shadow: var(--shadow-xl);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sim-scenarios-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.lead-scenario-btn {
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  transition: all var(--transition-smooth);
}

.lead-scenario-btn:hover,
.lead-scenario-btn.is-active {
  background: var(--color-text-primary);
  color: #ffffff;
}

.sim-chat-window {
  background: var(--color-bg-main);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-bubble {
  max-width: 85%;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.5;
  position: relative;
}

.chat-bubble-incoming {
  align-self: flex-start;
  background: #ffffff;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-sm);
}

.chat-bubble-outgoing {
  align-self: flex-end;
  background: var(--color-accent-primary);
  color: #ffffff;
}

.chat-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 6px;
  font-size: 11px;
}

.chat-bubble-incoming .chat-meta {
  color: var(--color-text-muted);
}

.chat-bubble-outgoing .chat-meta {
  color: rgba(255, 255, 255, 0.8);
}

.chat-intent-tag {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
}

.badge-question {
  background: #dbeafe;
  color: #1e40af;
}

.badge-price {
  background: #fef3c7;
  color: #92400e;
}

.badge-buy {
  background: #dcfce7;
  color: #166534;
}

.sim-telegram-alert {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 13px;
  color: #1e40af;
  transition: transform var(--transition-smooth);
}

.sim-telegram-alert.is-pulsing {
  transform: scale(1.02);
}

.sim-telegram-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  stroke: currentColor;
}

@media (max-width: 1024px) {
  .leads-layout {
    grid-template-columns: minmax(0, 1fr);
    min-width: 0;
    width: 100%;
  }
  .leads-features-list,
  .leads-interactive-card {
    min-width: 0;
    width: 100%;
    max-width: 100%;
  }
}

/* ─── Section 4: «Для кого» ───────────────────────────────────────────── */
/* Centered flex grid rule: 3 items centered */
.audience-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px;
}

.audience-card {
  flex: 0 1 calc(33.333% - 20px);
  min-width: 280px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.audience-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent-border);
}

.audience-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  color: var(--color-accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: transform var(--transition-bounce);
}

.audience-card:hover .audience-icon {
  transform: scale(1.1);
}

.audience-icon svg {
  width: 26px;
  height: 26px;
  stroke: currentColor;
}

.audience-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.audience-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

@media (max-width: 900px) {
  .audience-card {
    flex: 0 1 calc(50% - 15px);
  }
}

@media (max-width: 600px) {
  .audience-card {
    flex: 0 1 100%;
  }
}

/* ─── Section 5: «Частые вопросы» ─────────────────────────────────────── */
.faq-section {
  background: #ffffff;
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--color-bg-main);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  overflow: hidden;
  transition: border-color var(--transition-smooth), background-color var(--transition-smooth);
}

.faq-item.is-open {
  border-color: var(--color-accent-border);
  background: #ffffff;
  box-shadow: var(--shadow-md);
}

.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--color-text-primary);
  text-align: left;
}

.faq-icon {
  width: 24px;
  height: 24px;
  color: var(--color-text-muted);
  transition: transform var(--transition-smooth), color var(--transition-smooth);
  flex-shrink: 0;
}

.faq-item.is-open .faq-icon {
  transform: rotate(180deg);
  color: var(--color-accent-primary);
}

.faq-icon svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
}

.faq-panel {
  max-height: 0px;
  overflow: hidden;
  transition: max-height var(--transition-smooth);
}

.faq-content {
  padding: 0 24px 22px 24px;
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ─── Section 6: Финальный CTA ────────────────────────────────────────── */
.final-cta-section {
  background: linear-gradient(180deg, #ffffff 0%, var(--color-bg-secondary) 100%);
  padding: 120px 0;
  text-align: center;
}

.final-cta-card {
  max-width: 860px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-medium);
  box-shadow: var(--shadow-xl);
  padding: 64px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.final-cta-title {
  font-family: var(--font-serif);
  font-size: 44px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}

.final-cta-subtitle {
  font-size: 19px;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-bottom: 40px;
  line-height: 1.6;
}

.final-cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .final-cta-card {
    padding: 40px 20px;
  }
  .final-cta-title {
    font-size: 30px;
  }
  .final-cta-subtitle {
    font-size: 16px;
  }
}

/* ─── Footer ──────────────────────────────────────────────────────────── */
.footer {
  background: #ffffff;
  border-top: 1px solid var(--color-border-subtle);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: color var(--transition-smooth);
}

.footer-link:hover {
  color: var(--color-accent-primary);
}

.footer-copy {
  font-size: 14px;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .footer-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
  }
}

/* ─── Back to Top Floating Button with Circular Progress Ring ─────────── */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--color-border-medium);
  box-shadow: var(--shadow-lg);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.9);
  transition: opacity var(--transition-smooth), transform var(--transition-smooth), visibility var(--transition-smooth), box-shadow var(--transition-smooth);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.back-to-top:hover {
  box-shadow: var(--shadow-xl);
  color: var(--color-accent-primary);
}

.back-to-top-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
  pointer-events: none;
}

.back-to-top-ring circle {
  fill: none;
  stroke: var(--color-accent-primary);
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.15s ease;
}

.back-to-top-icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  position: relative;
  z-index: 2;
  transition: transform var(--transition-smooth);
}

.back-to-top:hover .back-to-top-icon {
  transform: translateY(-2px);
}

@media (max-width: 640px) {
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 46px;
    height: 46px;
  }
}

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