/* CSS ПЕРЕМЕННЫЕ И БАЗОВЫЕ НАСТРОЙКИ */
:root {
  --color-dark: #1c1c1e;
  --color-light-bg: #f4f4f5;
  --color-white: #ffffff;
  --color-border: #e4e4e7;
  --color-border-dark: #27272a;
  --color-text-main: #18181b;
  --color-text-muted: #71717a;
  --color-text-light: #f4f4f5;
  --color-text-light-muted: #a1a1aa;
  
  /* Единственный акцентный цвет — насыщенный синий для кнопок и цифр */
  --color-accent: #0052cc;
  --color-accent-hover: #003d99;

  --font-heading: 'Oswald', 'Roboto Condensed', 'Arial Narrow', sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  --radius-main: 4px;
}

/* СБРОС И ОСНОВНЫЕ СТИЛИ (Mobile First 360px) */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text-main);
  background-color: var(--color-white);
  overflow-x: hidden;
  max-width: 100vw;
  padding-bottom: 60px; /* Отступ для мобильной прилипшей полосы */
}

/* Ограничение длины и выравнивание многострочного текста */
p, li, dd {
  text-align: left;
}

/* Типографические стандарты для цифр и цен */
.num, .price-highlight, .tile-price, .cell-price, .gallery-price, .lead-phone, .header-phone {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

.price-highlight {
  color: var(--color-accent);
  font-weight: 700;
}

/* Кнопки */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  min-width: 44px;
  padding: 0 24px;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  border-radius: var(--radius-main);
  border: none;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* Контейнеры */
.container {
  width: 100%;
  padding-left: 16px;
  padding-right: 16px;
  margin-left: auto;
  margin-right: auto;
}

.section {
  padding-top: 48px;
  padding-bottom: 48px;
  border-bottom: 2px solid var(--color-border);
}

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

.section-dark {
  background-color: var(--color-dark);
  color: var(--color-text-light);
  border-bottom: 2px solid var(--color-border-dark);
}

.section-lead {
  background-color: var(--color-dark);
  color: var(--color-text-light);
  border-bottom: none;
}

/* Заголовки секций */
.section-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-intro {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

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

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

/* 0. МОБИЛЬНАЯ ПРИЛИПШАЯ ПОЛОСА */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background-color: var(--color-dark);
  display: flex;
  z-index: 1000;
  border-top: 2px solid var(--color-border-dark);
}

.mobile-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  min-height: 44px;
}

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

.mobile-btn-wa {
  background-color: var(--color-dark);
  color: var(--color-white);
  border-left: 1px solid var(--color-border-dark);
}

/* 1. ШАПКА */
.header {
  height: 64px;
  background-color: var(--color-white);
  border-bottom: 2px solid var(--color-border);
  display: flex;
  align-items: center;
}

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

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

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--color-dark);
}

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

.header-contact {
  display: none;
  flex-direction: column;
  align-items: flex-end;
}

.header-phone {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-dark);
  text-decoration: none;
}

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

/* 2. ПЕРВЫЙ ЭКРАН (HERO) */
.hero-section {
  position: relative;
  background-color: var(--color-dark);
  background-image: url('images/hero-bg.png');
  background-size: cover;
  background-position: center;
  padding-top: 48px;
  padding-bottom: 48px;
  border-bottom: 2px solid var(--color-border-dark);
}

/* Тёмная подложка под текст (без размытия / без блюра) */
.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(28, 28, 30, 0.92) 0%, rgba(28, 28, 30, 0.98) 100%);
  z-index: 1;
}

.hero-container {
  position: relative;
  z-index: 2;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.05;
  color: var(--color-text-light);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--color-text-light-muted);
  margin-bottom: 32px;
}

/* 3 Плитки с готовыми ценами */
.hero-tiles {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.tile-card {
  background-color: #27272a;
  border: 2px solid #3f3f46;
  border-radius: var(--radius-main);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.tile-label {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-text-light-muted);
  letter-spacing: 0.02em;
  margin-bottom: 4px;
}

.tile-price {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hero-btn {
  width: 100%;
}

.hero-btn-note {
  font-size: 0.875rem;
  color: var(--color-text-light-muted);
}

/* 3. ТАБЛИЦА ЦЕН */
.table-wrapper {
  width: 100%;
  border: 2px solid var(--color-dark);
  border-radius: var(--radius-main);
  margin-bottom: 32px;
  overflow: hidden;
}

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

.price-table th,
.price-table td {
  padding: 10px 8px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.price-table th {
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--color-light-bg);
  color: var(--color-dark);
  border-bottom: 2px solid var(--color-dark);
}

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

.cell-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-dark);
  width: 27%;
}

.cell-price {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  white-space: nowrap;
  width: 27%;
}

.cell-desc {
  font-size: 0.875rem;
  line-height: 1.3;
  color: var(--color-text-main);
  width: 46%;
  word-wrap: break-word;
}

/* Честный блок "Входит / Отдельно" */
.price-details-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.price-details-card {
  border: 2px solid var(--color-dark);
  border-radius: var(--radius-main);
  padding: 24px;
}

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

.card-extra {
  background-color: var(--color-white);
}

.details-title {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: var(--color-dark);
}

.details-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.details-list li {
  font-size: 1rem;
  padding-left: 20px;
  position: relative;
}

.details-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  font-weight: 700;
}

/* 4. КАЛЬКУЛЯТОР */
.calc-box {
  background-color: #27272a;
  border: 2px solid #3f3f46;
  border-radius: var(--radius-main);
  padding: 24px;
}

.calc-inputs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-family: var(--font-heading);
  font-size: 1rem;
  text-transform: uppercase;
  color: var(--color-text-light-muted);
}

.form-input, .form-select {
  height: 48px;
  min-height: 44px;
  padding: 0 16px;
  font-size: 1.125rem;
  font-family: var(--font-body);
  color: var(--color-dark);
  background-color: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-main);
  outline: none;
}

.form-input:focus, .form-select:focus {
  border-color: var(--color-accent);
}

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

.calc-result-text {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  color: var(--color-text-light);
}

.calc-submit-btn {
  width: 100%;
}

.calc-disclaimer {
  font-size: 0.875rem;
  color: var(--color-text-light-muted);
}

/* 5. ПОРЯДОК РАБОТЫ */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.step-card {
  border: 2px solid var(--color-dark);
  border-radius: var(--radius-main);
  padding: 24px;
  background-color: var(--color-white);
}

.step-num {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  display: block;
  margin-bottom: 8px;
}

.step-heading {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 8px;
  color: var(--color-dark);
}

.step-text {
  font-size: 1rem;
  color: var(--color-text-main);
}

/* 6. РАБОТЫ (ГАЛЕРЕЯ MASONRY-ПОДОБНАЯ) */
.gallery-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.gallery-item {
  border: 2px solid #3f3f46;
  border-radius: var(--radius-main);
  background-color: #27272a;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.gallery-img {
  width: 100%;
  height: 240px;
  flex: 1 1 auto;
  object-fit: cover;
  object-position: center;
  display: block;
  border-bottom: 2px solid #3f3f46;
}

.photo-placeholder {
  height: 220px;
  background-color: #18181b;
  border-bottom: 2px solid #3f3f46;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  color: var(--color-text-light-muted);
}

.placeholder-tag {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 2px 8px;
  border-radius: var(--radius-main);
  margin-bottom: 12px;
}

.placeholder-info {
  font-size: 0.9375rem;
  line-height: 1.4;
  color: var(--color-text-light);
}

.gallery-meta {
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #27272a;
  flex-shrink: 0;
}

.gallery-specs {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: var(--color-text-light);
}

.gallery-price {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-accent);
}

/* 7. АККОРДЕОН FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 2px solid var(--color-dark);
  border-radius: var(--radius-main);
  background-color: var(--color-white);
}

.faq-question {
  padding: 20px;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-dark);
  font-weight: 700;
}

.faq-item[open] .faq-question::after {
  content: "—";
}

.faq-answer {
  padding: 0 20px 20px 20px;
  font-size: 1rem;
  color: var(--color-text-main);
  border-top: 1px dashed var(--color-border);
  padding-top: 16px;
}

/* 8. ЗОНА ВЫЕЗДА */
.cities-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.city-tag {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  background-color: #27272a;
  color: var(--color-text-light);
  border: 1px solid #3f3f46;
  padding: 8px 16px;
  border-radius: var(--radius-main);
}

.coverage-note {
  font-size: 1rem;
  color: var(--color-text-light-muted);
  border-left: 4px solid var(--color-accent);
  padding-left: 16px;
}

/* 9. ФОРМА ЗАЯВКИ */
.lead-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.lead-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.lead-desc {
  font-size: 1.125rem;
  color: var(--color-text-light-muted);
  margin-bottom: 24px;
}

.lead-contacts {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lead-phone {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: none;
}

.lead-wa-link {
  font-size: 1rem;
  color: var(--color-text-light);
  text-decoration: underline;
}

.lead-form {
  background-color: #27272a;
  border: 2px solid #3f3f46;
  border-radius: var(--radius-main);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-submit-btn {
  width: 100%;
  margin-top: 8px;
}

.form-subtext {
  font-size: 0.875rem;
  color: var(--color-text-light-muted);
}

/* 10. ПОДВАЛ */
.footer {
  background-color: var(--color-dark);
  color: var(--color-text-light-muted);
  padding-top: 32px;
  padding-bottom: 32px;
  border-top: 2px solid var(--color-border-dark);
}

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

.footer-brand {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-light);
  display: block;
  margin-bottom: 4px;
}

.footer-text, .footer-info {
  font-size: 0.875rem;
}

.footer-info a {
  color: var(--color-text-light);
  text-decoration: none;
}

/* ==========================================================================
   АДАПТИВНЫЕ МЕДИА-ЗАПРОСЫ (Progressive Enhancement)
   ========================================================================== */

/* БРЕЙКПОИНТ 480px */
@media (min-width: 480px) {
  .hero-tiles {
    flex-direction: row;
    flex-wrap: wrap;
  }
  
  .tile-card {
    flex: 1 1 calc(50% - 12px);
  }

  .calc-inputs-grid {
    grid-template-columns: 1fr 1fr;
  }

  .form-group:last-child {
    grid-column: span 2;
  }

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

/* БРЕЙКПОИНТ 768px (Десктоп / Планшет) */
@media (min-width: 768px) {
  body {
    padding-bottom: 0; /* Скрываем нижний мобильный отступ */
  }

  .mobile-sticky-bar {
    display: none; /* Скрываем мобильную плашку */
  }

  .header-contact {
    display: flex;
  }

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

  .hero-title {
    font-size: 4.5rem;
    max-width: 800px;
  }

  .hero-subtitle {
    font-size: 1.25rem;
  }

  .hero-tiles {
    flex-wrap: nowrap;
    gap: 20px;
    max-width: 700px;
  }

  .tile-card {
    flex: 1;
  }

  .hero-actions {
    flex-direction: row;
    align-items: center;
    gap: 20px;
  }

  .hero-btn {
    width: auto;
    padding: 0 40px;
  }

  .price-details-grid {
    grid-template-columns: 1fr 1fr;
  }

  .table-scroll-hint {
    display: none;
  }

  .calc-inputs-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .form-group:last-child {
    grid-column: auto;
  }

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

  .calc-submit-btn {
    width: auto;
  }

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

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

  .item-large,
  .item-wide {
    grid-column: span 2;
  }

  .lead-container {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

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

/* БРЕЙКПОИНТ 1024px (Максимальный десктоп) */
@media (min-width: 1024px) {
  .container {
    max-width: 1140px;
  }

  .section-title {
    font-size: 3rem;
  }

  .hero-title {
    font-size: 5rem;
  }
}

/* ДЕТАЛИЗИРОВАННАЯ СИСТЕМА СКРОЛЛ-АНИМАЦИЙ */

/* 1. Анимированная акцентная линия под заголовками секций */
.section-title {
  position: relative;
  display: inline-block;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s cubic-bezier(0.25, 1, 0.5, 1), transform 0.7s cubic-bezier(0.25, 1, 0.5, 1);
}

.section-title.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 3px;
  background-color: var(--color-accent);
  transition: width 0.8s cubic-bezier(0.25, 1, 0.5, 1) 0.25s;
}

.section-title.is-visible::after {
  width: 100%;
}

/* 2. Различные типы анимаций появления */
.anim-fade-up,
.animate-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.85s cubic-bezier(0.25, 1, 0.5, 1), transform 0.85s cubic-bezier(0.25, 1, 0.5, 1);
  will-change: opacity, transform;
}

.anim-fade-scale {
  opacity: 0;
  transform: scale(0.96) translateY(20px);
  transition: opacity 0.85s cubic-bezier(0.25, 1, 0.5, 1), transform 0.85s cubic-bezier(0.25, 1, 0.5, 1);
  will-change: opacity, transform;
}

.anim-slide-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.75s cubic-bezier(0.25, 1, 0.5, 1), transform 0.75s cubic-bezier(0.25, 1, 0.5, 1);
  will-change: opacity, transform;
}

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

/* Автоматическая задержка для дочерних элементов */
.stagger-child {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.25, 1, 0.5, 1), transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }
.delay-4 { transition-delay: 0.6s; }

/* ИНТЕРАКТИВНЫЕ МИКРО-АНИМАЦИИ КАРТОЧЕК И КНОПОК */
.tile-card, .gallery-item, .step-card, .price-details-card, .faq-item {
  transition: transform 0.45s cubic-bezier(0.25, 1, 0.5, 1), border-color 0.45s ease, box-shadow 0.45s ease;
}

.tile-card:hover, .gallery-item:hover, .step-card:hover, .price-details-card:hover, .faq-item:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
}

.gallery-img {
  transition: transform 0.65s ease;
}

.gallery-item:hover .gallery-img {
  transform: scale(1.04);
}

.city-tag {
  transition: transform 0.35s ease, border-color 0.35s ease, color 0.35s ease;
}

.city-tag:hover {
  transform: translateY(-3px) scale(1.04);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.price-table tbody tr {
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.price-table tbody tr:hover {
  background-color: rgba(0, 82, 204, 0.05);
}

/* СВЕРХДИНАМИЧЕСКИЕ АНИМАЦИИ: SHIMMER, RIPPLE, PULSE GLOW */

/* Блик и вспышка при поялении карточек галереи */
.gallery-item {
  position: relative;
}

.gallery-item::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
  transform: skewX(-20deg);
  pointer-events: none;
  transition: left 0.75s ease;
}

.gallery-item.is-visible::after {
  animation: shimmerSweep 1.2s ease-out 0.3s;
}

@keyframes shimmerSweep {
  0% { left: -100%; }
  100% { left: 160%; }
}

/* Пульсирующее свечение главной кнопки */
.btn-primary {
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 0 0 rgba(0, 82, 204, 0.4);
  animation: buttonGlowPulse 2.5s infinite;
}

@keyframes buttonGlowPulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 82, 204, 0.5); }
  70% { box-shadow: 0 0 0 12px rgba(0, 82, 204, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 82, 204, 0); }
}

/* Анимация клика (Ripple) */
.btn .ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: scale(0);
  animation: rippleAnimation 0.6s linear;
  pointer-events: none;
}

@keyframes rippleAnimation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Анимация плавного уменьшения шапки при скролле */
.header {
  transition: height 0.3s ease, background-color 0.3s ease;
}

.header.is-scrolled {
  height: 54px;
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}