/* ==========================================================================
   СИСТЕМА ДИЗАЙНА И ПЕРЕМЕННЫЕ (ЧИСТО 52)
   ========================================================================== */
:root {
  /* Палитра: белый / графит #22262A / насыщенный зелёный #00875A */
  --color-white: #FFFFFF;
  --color-dark: #22262A;
  --color-accent: #00875A;
  --color-accent-hover: #006B47;
  --color-light-bg: #F4F5F7;
  --color-gray-bg: #EAECEF;
  --color-border: #D1D5DB;
  --color-text-main: #22262A;
  --color-text-muted: #6B7280;
  
  /* Единый радиус скруглений по всему сайту */
  --radius-main: 8px;
  
  /* Единая аккуратная минимальная тень */
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06);

  /* Типографика */
  --font-heading: 'System-UI', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'System-UI', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ==========================================================================
   СБРОС СТИЛЕЙ И БАЗОВЫЕ НАСТРОЙКИ (MOBILE-FIRST 360PX)
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem; /* 16px */
  line-height: 1.5;
  color: var(--color-text-main);
  background-color: var(--color-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

button, input, select {
  font: inherit;
}

/* ==========================================================================
   ОБЩИЕ КОМПОНЕНТЫ И СЕТКА
   ========================================================================== */
.container {
  width: 100%;
  padding-left: 16px;
  padding-right: 16px;
  margin-left: auto;
  margin-right: auto;
}

.section {
  padding-top: 48px;
  padding-bottom: 48px;
}

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

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

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

.section-title {
  font-family: var(--font-heading);
  font-size: 1.75rem; /* 28px */
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-dark);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.title-light {
  color: var(--color-white);
}

.section-intro {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  max-width: 680px;
}

.text-light {
  color: #9CA3AF;
}

/* Цифры и цены - моносвойства */
.tile-price,
.cell-price,
.total-amount,
.radio-tile-sub,
.check-price,
.cell-sub-price,
.contact-phone-big {
  font-variant-numeric: tabular-nums;
}

/* Кнопки (Min 44x44px) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 24px;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-main);
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.15s ease;
  text-align: center;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
}

.btn-primary:active {
  transform: translateY(1px);
}

/* Плейсхолдеры для фото */
.photo-placeholder {
  width: 100%;
  height: 100%;
  min-height: 220px;
  background-color: var(--color-gray-bg);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-main);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

/* ==========================================================================
   0. ПРИЛИПШАЯ ПОЛОСА СНИЗУ (МОБИЛЬНЫЕ)
   ========================================================================== */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background-color: var(--color-white);
  padding: 10px 16px;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  display: flex;
  gap: 10px;
  align-items: center;
}

.mobile-btn {
  flex: 1;
  min-height: 44px;
  font-size: 0.875rem;
  padding: 10px 14px;
}

.mobile-wa-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background-color: #25D366;
  color: var(--color-white);
  border-radius: var(--radius-main);
  flex-shrink: 0;
}

/* ==========================================================================
   1. ШАПКА
   ========================================================================== */
.header {
  height: 64px;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
}

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

.logo {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-dark);
  line-height: 1;
  letter-spacing: -0.02em;
}

.logo-sub {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.2;
}

.header-contacts {
  display: flex;
  align-items: center;
  gap: 12px;
}

.phone-link {
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-dark);
  white-space: nowrap;
}

.wa-header-link {
  font-size: 0.875rem;
  font-weight: 700;
  color: #25D366;
  display: none;
}

/* ==========================================================================
   2. ПЕРВЫЙ ЭКРАН (HERO)
   ========================================================================== */
.hero-section {
  position: relative;
  background-color: var(--color-dark);
  background-image: linear-gradient(rgba(34, 38, 42, 0.45), rgba(34, 38, 42, 0.68)), url('images/hero-bg.png');
  background-size: cover;
  background-position: center;
  color: var(--color-white);
  padding-top: 40px;
  padding-bottom: 48px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 2.25rem; /* 36px */
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.hero-price {
  color: #34D399; /* Светлый травянистый акцент на тёмном фоне */
}

.hero-subtitle {
  font-size: 1rem;
  color: #E5E7EB;
  margin-bottom: 24px;
}

.hero-tiles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.tile-card {
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-main);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.tile-title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: #9CA3AF;
  text-transform: uppercase;
}

.tile-price {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--color-white);
  margin-top: 4px;
  margin-bottom: 2px;
}

.tile-time {
  font-size: 0.875rem;
  color: #D1D5DB;
}

.hero-action {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.hero-btn {
  width: 100%;
}

.hero-note {
  font-size: 0.8125rem;
  color: #9CA3AF;
}

/* ==========================================================================
   3. КАЛЬКУЛЯТОР
   ========================================================================== */
.calc-box {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.calc-group {
  margin-bottom: 24px;
}

.calc-label {
  display: block;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.calc-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.area-input-wrap {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-accent);
}

.area-input-wrap input {
  width: 64px;
  padding: 4px 8px;
  font-size: 1.125rem;
  font-weight: 700;
  text-align: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
}

.calc-slider {
  width: 100%;
  height: 8px;
  background-color: var(--color-gray-bg);
  border-radius: 4px;
  accent-color: var(--color-accent);
  cursor: pointer;
}

/* Радио-плитки для типов уборки */
.calc-radio-tiles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.radio-tile {
  cursor: pointer;
}

.radio-tile input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.radio-tile-content {
  display: flex;
  flex-direction: column;
  padding: 14px;
  background-color: var(--color-light-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-main);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.radio-tile input:checked + .radio-tile-content {
  border-color: var(--color-accent);
  background-color: rgba(0, 135, 90, 0.05);
}

.radio-tile-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
}

.radio-tile-sub {
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 700;
  margin-top: 2px;
}

/* Санузлы */
.calc-radio-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill-radio {
  cursor: pointer;
}

.pill-radio input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.pill-radio span {
  display: inline-block;
  padding: 8px 14px;
  background-color: var(--color-light-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  font-size: 0.875rem;
  font-weight: 600;
}

.pill-radio input:checked + span {
  border-color: var(--color-accent);
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* Допы Чекбоксы */
.extras-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.checkbox-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background-color: var(--color-light-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  cursor: pointer;
}

.checkbox-card input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--color-accent);
  cursor: pointer;
}

.checkbox-text {
  display: flex;
  flex-direction: column;
}

.check-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-dark);
}

.check-price {
  font-size: 0.8125rem;
  color: var(--color-accent);
  font-weight: 700;
}

/* Результат калькулятора */
.calc-result-panel {
  background-color: var(--color-light-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-main);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 16px;
}

.total-price-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.total-label {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
}

.total-amount {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
}

.time-estimate {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.calc-btn {
  width: 100%;
}

.honest-disclaimer {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   4. ЧТО ВХОДИТ И ЧТО НЕ ВХОДИТ
   ========================================================================== */
.scope-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.scope-box {
  background-color: #2D3237;
  border-radius: var(--radius-main);
  padding: 24px;

}

.scope-box-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.title-includes {
  color: #34D399;
}

.title-excludes {
  color: #F87171;
}

.scope-category {
  margin-bottom: 16px;
}

.scope-category:last-child {
  margin-bottom: 0;
}

.cat-name {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  display: block;
}

.cat-desc {
  font-size: 0.9375rem;
  color: #D1D5DB;
}

/* ==========================================================================
   5. КТО ПРИДЁТ (БЛОК ДОВЕРИЯ)
   ========================================================================== */
.team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 32px;
}

.cleaner-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.cleaner-photo-wrap {
  width: 100%;
  height: 240px;
  overflow: hidden;
  background-color: var(--color-gray-bg);
}

.cleaner-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.cleaner-info {
  padding: 16px;
}

.cleaner-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-dark);
}

.cleaner-exp {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent);
  display: block;
  margin-bottom: 8px;
}

.cleaner-spec {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.trust-facts-box {
  background-color: var(--color-light-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-main);
  padding: 20px;
}

.trust-facts-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.trust-facts-list li {
  font-size: 0.9375rem;
  color: var(--color-text-main);
}

/* ==========================================================================
   6. ПОРЯДОК РАБОТЫ (4 ШАГА)
   ========================================================================== */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.step-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  padding: 20px;
}

.step-card-highlight {
  border: 2px solid var(--color-accent);
  background-color: rgba(0, 135, 90, 0.03);
}

.step-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  display: block;
  margin-bottom: 8px;
}

.step-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 6px;
}

.step-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   7. РЕГУЛЯРНАЯ УБОРКА И ОФИСЫ
   ========================================================================== */
.sub-table-wrapper {
  width: 100%;
  overflow-x: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  margin-bottom: 24px;
}

.sub-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-white);
}

.sub-table th,
.sub-table td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.sub-table th {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--color-light-bg);
}

.cell-freq {
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
}

.cell-count {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.cell-sub-price {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-accent);
}

.cell-benefit {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.office-banner {
  background-color: var(--color-light-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  padding: 16px;
  font-size: 0.9375rem;
}

/* ==========================================================================
   8. ГАЛЕРЕЯ ДО / ПОСЛЕ (ИНТЕРАКТИВНЫЙ СЛАЙДЕР)
   ========================================================================== */
.slider-comparison-box {
  max-width: 800px;
}

.ba-container {
  position: relative;
  width: 100%;
  height: 300px;
  overflow: hidden;
  border-radius: var(--radius-main);
  border: 2px solid rgba(255, 255, 255, 0.2);
  user-select: none;
}

.ba-image-before,
.ba-image-after {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.ba-image-before {
  z-index: 2;
  clip-path: inset(0 50% 0 0);
}

.ba-image-after {
  z-index: 1;
}

.ba-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.placeholder-before {
  background-color: #374151;
  color: #F9FAFB;
}

.placeholder-after {
  background-color: #065F46;
  color: #F9FAFB;
}

.ba-badge {
  position: absolute;
  top: 16px;
  padding: 4px 10px;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 800;
  border-radius: 4px;
  z-index: 5;
}

.badge-before {
  left: 16px;
  background-color: rgba(0, 0, 0, 0.7);
  color: var(--color-white);
}

.badge-after {
  right: 16px;
  background-color: var(--color-accent);
  color: var(--color-white);
}

.ba-range-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  z-index: 10;
  cursor: ew-resize;
}

.ba-divider-line {
  position: absolute;
  top: 0;
  left: 50%;
  width: 3px;
  height: 100%;
  background-color: var(--color-white);
  z-index: 4;
  transform: translateX(-50%);
  pointer-events: none;
}

.ba-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  background-color: var(--color-white);
  color: var(--color-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.ba-caption {
  font-size: 0.875rem;
  color: #9CA3AF;
  margin-top: 12px;
}

/* ==========================================================================
   9. ЧАСТЫЕ ВОПРОСЫ (АККОРДЕОН)
   ========================================================================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  overflow: hidden;
}

.faq-question {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
  padding: 16px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-accent);
}

.faq-item[open] .faq-question::after {
  content: '−';
}

.faq-answer {
  padding: 0 16px 16px 16px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-light-bg);
  padding-top: 12px;
}

/* ==========================================================================
   10. ФОРМА ЗАКАЗА
   ========================================================================== */
.form-box {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  padding: 24px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-dark);
}

.form-input {
  min-height: 48px;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-main);
  font-size: 1rem;
}

.form-btn {
  width: 100%;
}

.contacts-footer-block {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-info-item {
  display: flex;
  flex-direction: column;
}

.contact-title {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.contact-phone-big {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-dark);
}

.contact-wa-link {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: #25D366;
}

.contact-hours {
  font-size: 0.9375rem;
  font-weight: 600;
}

/* ==========================================================================
   11. ПОДВАЛ
   ========================================================================== */
.footer {
  background-color: var(--color-dark);
  color: #9CA3AF;
  padding-top: 32px;
  padding-bottom: 80px; /* Запас для мобильной прилипшей полосы */
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
}

.footer-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.footer-logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-white);
  display: block;
  margin-bottom: 8px;
}

.footer-col-title {
  color: var(--color-white);
  font-weight: 700;
  display: block;
  margin-bottom: 4px;
}

/* ==========================================================================
   СКРОЛЛ-АНИМАЦИЯ ПОЯВЛЕНИЯ (2-3 АККУРАТНЫЕ АНИМАЦИИ)
   ========================================================================== */
/* ==========================================================================
   БОГАТАЯ СИСТЕМА СКРОЛЛ-АНИМАЦИЙ И МИКРО-ВЗАИМОДЕЙСТВИЙ
   ========================================================================== */
.section-title {
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 3px;
  background-color: var(--color-accent);
  transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 2px;
}

.section-title.is-visible::after {
  width: 56px;
}

/* Базовые классы появление при скролле */
.animate-on-scroll,
.anim-fade-up,
.anim-fade-scale,
.anim-slide-left,
.anim-slide-right {
  opacity: 0;
  will-change: transform, opacity;
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

.anim-fade-up,
.animate-on-scroll {
  transform: translateY(30px);
}

.anim-fade-scale {
  transform: scale(0.94) translateY(20px);
}

.anim-slide-left {
  transform: translateX(-40px);
}

.anim-slide-right {
  transform: translateX(40px);
}

.animate-on-scroll.is-visible,
.anim-fade-up.is-visible,
.anim-fade-scale.is-visible,
.anim-slide-left.is-visible,
.anim-slide-right.is-visible {
  opacity: 1;
  transform: translate(0) scale(1);
}

/* Шахматные задержки (Stagger Delays) для списков и сеток */
.stagger-item:nth-child(1) { transition-delay: 0.05s; }
.stagger-item:nth-child(2) { transition-delay: 0.15s; }
.stagger-item:nth-child(3) { transition-delay: 0.25s; }
.stagger-item:nth-child(4) { transition-delay: 0.35s; }

/* Ховер-эффекты с плавной микро-анимацией */
.tile-card,
.cleaner-card,
.step-card,
.checkbox-card,
.radio-tile-content {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease;
}

.tile-card:hover,
.cleaner-card:hover,
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.checkbox-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

/* ==========================================================================
   МЕДИА-ЗАПРОСЫ (MOBILE-FIRST BREAKPOINTS: 480 / 768 / 1024)
   ========================================================================== */

/* Брейкпоинт 480px (Большие смартфоны) */
@media (min-width: 480px) {
  .hero-tiles-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

/* Брейкпоинт 768px (Планшеты) */
@media (min-width: 768px) {
  .mobile-sticky-bar {
    display: none;
  }

  .footer {
    padding-bottom: 32px;
  }

  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .section-title {
    font-size: 2.25rem;
  }

  .wa-header-link {
    display: inline-block;
  }

  .hero-section {
    padding-top: 72px;
    padding-bottom: 80px;
  }

  .hero-title {
    font-size: 3.5rem; /* H1 в 5-6 раз больше текста */
  }

  .hero-btn {
    width: auto;
    padding-left: 36px;
    padding-right: 36px;
  }

  .scope-grid {
    grid-template-columns: 1fr 1fr;
  }

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

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

  .calc-result-panel {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .calc-btn {
    width: auto;
    padding-left: 32px;
    padding-right: 32px;
  }

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

  .form-btn {
    width: auto;
    padding-left: 40px;
    padding-right: 40px;
  }

  .contacts-footer-block {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

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

  .ba-container {
    height: 420px;
  }
}

/* Брейкпоинт 1024px (Десктопы) */
@media (min-width: 1024px) {
  .container {
    max-width: 1140px;
  }

  .hero-title {
    font-size: 4rem;
  }

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