/* ===== ГЛАВНЫЙ CSS — ГЛАВНАЯ СТРАНИЦА ===== */

/* ═══════════════════════════════════════════
   CINEMATIC HERO — полноэкранный
═══════════════════════════════════════════ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* Фото гор — параллакс */
.hero__bg {
  position: absolute;
  inset: -60px 0;
  background: url('../images/hero-mountains.jpg') center 40% / cover no-repeat;
  transform: translateY(0);
  will-change: transform;
  transition: transform 0.06s linear;
  z-index: 0;
}

/* Тёмный градиентный оверлей */
.hero__overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg,
      rgba(17,17,19,0.55) 0%,
      rgba(17,17,19,0.40) 40%,
      rgba(17,17,19,0.72) 80%,
      rgba(17,17,19,0.92) 100%
    );
  z-index: 1;
}

/* Декоративное голубое свечение */
.hero::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 35%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(43,184,212,.10) 0%, transparent 65%);
  pointer-events: none;
  z-index: 2;
}

/* Контент-обёртка */
.hero__content-wrap {
  position: relative;
  z-index: 3;
  text-align: center;
  width: 100%;
  padding-top: 100px; /* компенсация фиксированной шапки (топбар ~36px + навбар ~64px) */
}

/* Бейдж */
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: rgba(43,184,212,.14);
  border: 1px solid rgba(43,184,212,.38);
  color: var(--color-accent);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
  letter-spacing: 0.3px;
}

.hero__title {
  color: #FBFFFE;
  font-size: var(--font-size-hero);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -1.5px;
  margin-bottom: var(--spacing-md);
  filter: blur(3.5px);
  transition: filter 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.hero__title:hover {
  filter: blur(0px);
}
.hero__title span { color: var(--color-accent); }

.hero__subtitle {
  color: rgba(251,255,254,.72);
  font-size: var(--font-size-md);
  line-height: 1.7;
  margin: 0 auto var(--spacing-xl);
  max-width: 540px;
}

.hero__actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xxl);
}

/* Стеклянная полоска со статистикой */
.hero__stats {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xl);
  padding: 20px 40px;
  background: rgba(17,17,19,.5);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: var(--radius-xl);
}
.hero__stat { text-align: center; }
.hero__stat-num {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #FBFFFE;
  line-height: 1;
}
.hero__stat-label {
  font-size: var(--font-size-xs);
  color: rgba(251,255,254,.48);
  margin-top: 5px;
  white-space: nowrap;
}
.hero__stat-divider {
  width: 1px;
  height: 44px;
  background: rgba(255,255,255,.14);
  flex-shrink: 0;
}

/* Стрелка-подсказка внизу */
.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,.35);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  animation: scrollBounce 2.2s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* Преимущества */
.features {
  background: var(--color-card-bg);
  padding: var(--spacing-xl) 0;
}
.features__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}
.feature-item { display: flex; align-items: center; gap: var(--spacing-md); }
.feature-item__icon {
  width: 52px;
  height: 52px;
  background: var(--color-accent);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: white;
}
.feature-item__title { font-weight: 600; color: var(--color-graphite); font-size: var(--font-size-sm); margin-bottom: 2px; }
.feature-item__desc  { font-size: var(--font-size-xs); color: var(--color-text-secondary); }

/* ═══════════════════════════════════════════
   Слайдер товаров
═══════════════════════════════════════════ */
.slider-wrap {
  position: relative;
}

/* Стрелки — внутри viewport, стеклянный эффект */
.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-60%);   /* немного выше центра — над кнопками карточки */
  z-index: 10;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.92);
  border: none;
  color: var(--color-graphite);
  font-size: 0;                  /* скрываем символы ← → */
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,0,0,.15);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background .2s, box-shadow .2s, opacity .2s, transform .2s;
}
/* SVG иконки через псевдоэлементы */
.slider-arrow--prev::after {
  content: '';
  display: block;
  width: 10px;
  height: 10px;
  border-left: 2.5px solid var(--color-graphite);
  border-bottom: 2.5px solid var(--color-graphite);
  transform: rotate(45deg) translate(2px, -2px);
  transition: border-color .2s;
}
.slider-arrow--next::after {
  content: '';
  display: block;
  width: 10px;
  height: 10px;
  border-right: 2.5px solid var(--color-graphite);
  border-top: 2.5px solid var(--color-graphite);
  transform: rotate(45deg) translate(-2px, 2px);
  transition: border-color .2s;
}
.slider-arrow:hover {
  background: var(--color-primary);
  box-shadow: 0 6px 24px rgba(150,3,26,.30);
  transform: translateY(-60%) scale(1.08);
}
.slider-arrow:hover::after {
  border-color: #fff;
}
.slider-arrow:disabled { opacity: 0; pointer-events: none; }
.slider-arrow--prev { left: 12px; }
.slider-arrow--next { right: 12px; }

/* Viewport */
.slider-viewport {
  overflow: hidden;
  padding: 8px 4px 12px;
  margin: 0 -4px;
}

/* Трек карточек */
.products-slider {
  display: flex;
  gap: 20px;
  will-change: transform;
}

.products-slider .product-card {
  flex: 0 0 calc((100% - 60px) / 4);  /* 4 карточки, 3 отступа */
  min-width: 0;
}

/* Точки — активная растягивается в pill */
.slider-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
}
.slider-dot {
  width: 8px;
  height: 8px;
  border-radius: 99px;
  background: var(--color-border);
  border: none;
  cursor: pointer;
  transition: background .3s, width .3s, opacity .3s;
  padding: 0;
}
.slider-dot.active {
  background: var(--color-primary);
  width: 24px;
}

@keyframes pulse-skeleton {
  0%, 100% { opacity: .15; }
  50% { opacity: .3; }
}

/* Калькулятор */
.calculator {
  background: linear-gradient(135deg, var(--color-graphite) 0%, #0d2830 100%);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xxl);
  color: #FBFFFE;
}
.calculator__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}
.calculator__title  { color: #FBFFFE; margin-bottom: var(--spacing-md); }
.calculator__subtitle { color: rgba(251,255,254,.65); margin-bottom: var(--spacing-xl); }
.calc-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}
.calc-form .form-input {
  background: rgba(251,255,254,.08);
  border-color: rgba(251,255,254,.15);
  color: #FBFFFE;
}
.calc-form .form-input:focus { border-color: var(--color-accent); }
.calc-form .form-label { color: rgba(251,255,254,.8); }

.calc-result {
  background: rgba(43,184,212,.10);
  border: 1px solid rgba(43,184,212,.28);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
}
.calc-result__value {
  font-size: 56px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}
.calc-result__unit         { font-size: var(--font-size-md); color: rgba(251,255,254,.6); margin-bottom: var(--spacing-sm); }
.calc-result__placeholder  { color: rgba(251,255,254,.4); font-size: var(--font-size-md); }

/* Карточки товаров в результате калькулятора */
.calc-product-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  text-decoration: none;
  color: #fff;
  margin-bottom: 8px;
  transition: background 0.2s, border-color 0.2s;
}
.calc-product-card:hover {
  background: rgba(255,255,255,0.11);
  border-color: rgba(91,191,212,0.4);
}
.calc-product-card__img {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.calc-product-card__img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.calc-product-card__info {
  flex: 1;
  min-width: 0;
}
.calc-product-card__brand {
  font-size: 11px;
  font-weight: 600;
  color: #5bbfd4;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.calc-product-card__name {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 2px 0;
}
.calc-product-card__area {
  font-size: 11px;
  color: rgba(255,255,255,0.5);
}
.calc-product-card__price {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Блок консультации */
.consultation-block {
  background: var(--color-card-bg);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.consultation-block__grid { display: grid; grid-template-columns: 1fr 1fr; }
.consultation-block__info { padding: var(--spacing-xxl); }
.consultation-block__title { margin-bottom: var(--spacing-md); }
.consultation-block__text  { color: var(--color-text-secondary); margin-bottom: var(--spacing-xl); line-height: 1.7; }
.consultation-block__channels {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
}
.channel-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition);
}
.channel-btn--tg   { background: #229ED9; color: white; }
.channel-btn--wa   { background: #25D366; color: white; }
.channel-btn--call { background: var(--color-graphite); color: white; }
.channel-btn:hover { transform: translateY(-2px); opacity: 0.9; }

.consultation-block__form {
  background: var(--color-graphite);
  padding: var(--spacing-xxl);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.consultation-block__form-title { color: #FBFFFE; margin-bottom: var(--spacing-xs); }
.consultation-block__form-sub   { color: rgba(251,255,254,.5); font-size: var(--font-size-sm); margin-bottom: var(--spacing-xl); }
.consultation-block__form .form-input {
  background: rgba(251,255,254,.08);
  border-color: rgba(251,255,254,.15);
  color: #FBFFFE;
}
.consultation-block__form .form-input:focus      { border-color: var(--color-accent); }
.consultation-block__form .form-input::placeholder { color: rgba(251,255,254,.35); }
.form-privacy { font-size: var(--font-size-xs); color: rgba(251,255,254,.35); margin-top: var(--spacing-sm); }
.form-privacy a { color: var(--color-accent); }

/* Отзывы */
.reviews__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}
.review-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}
.review-card__header { display: flex; align-items: center; gap: var(--spacing-md); margin-bottom: var(--spacing-md); }
.review-card__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-card-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-accent);
  font-size: var(--font-size-md);
  flex-shrink: 0;
}
.review-card__name { font-weight: 600; color: var(--color-graphite); font-size: var(--font-size-sm); }
.review-card__date { font-size: var(--font-size-xs); color: var(--color-text-secondary); }
.review-card__text { font-size: var(--font-size-sm); line-height: 1.7; color: var(--color-text); }

/* Виджет обратного звонка */
.callback-widget {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 500;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-sm);
}
.callback-btn {
  width: 56px;
  height: 56px;
  background: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 16px rgba(43,184,212,.45);
  animation: pulse 2s infinite;
  transition: all var(--transition);
}
.callback-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(43,184,212,.7);
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 4px 16px rgba(43,184,212,.45); }
  50%       { box-shadow: 0 4px 28px rgba(43,184,212,.8); }
}

/* ===== АДАПТИВНОСТЬ ===== */
@media (max-width: 1024px) {
  .features__grid  { grid-template-columns: repeat(2, 1fr); }
  .products-slider .product-card { flex: 0 0 calc((100% - 20px) / 2); }
  .reviews__grid   { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  /* Hero */
  .hero { height: 100svh; min-height: 520px; }
  .hero__content-wrap { padding-top: 64px; } /* шапка без топбара */
  .hero__title { font-size: 34px; letter-spacing: -0.5px; filter: none; }
  .hero__subtitle { font-size: 15px; }
  .hero__stats { gap: var(--spacing-md); padding: 16px 20px; }
  .hero__stat-divider { height: 32px; }
  .hero__stat-value { font-size: 28px; }

  /* Слайдер */
  .slider-arrow--prev { left: 4px; }
  .slider-arrow--next { right: 4px; }
  .products-slider .product-card { flex: 0 0 calc(50% - 10px); }

  /* Секции */
  .features__grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-md); }
  .calculator__grid { grid-template-columns: 1fr; }
  .calc-form__row { grid-template-columns: 1fr; }
  .calc-result { margin-top: 24px; }
  .consultation-block__grid { grid-template-columns: 1fr; }
  .consultation-block__info { padding: var(--spacing-lg); }
  .consultation-block__form { padding: var(--spacing-lg); }
  .reviews__grid { grid-template-columns: 1fr; }

  /* Продуктовые карточки */
  .product-card__overlay { padding: 20px 12px 10px; }
  .product-card__name { font-size: 13px; }
  .product-card__price { font-size: 16px; }
}

@media (max-width: 480px) {
  /* Hero */
  .hero__title { font-size: 26px; }
  .hero__subtitle { font-size: 14px; padding: 0 8px; }
  .hero__stats { flex-direction: column; gap: 8px; padding: 12px 16px; }
  .hero__stat-divider { width: 40px; height: 1px; }
  .hero__stat-value { font-size: 24px; }
  .hero__actions { flex-direction: column; gap: 10px; }
  .hero__actions .btn { width: 100%; justify-content: center; }

  /* Слайдер — 1 карточка */
  .products-slider .product-card { flex: 0 0 100%; }
  .slider-arrow--prev { left: 2px; }
  .slider-arrow--next { right: 2px; }

  /* Особенности */
  .features__grid { grid-template-columns: 1fr; }
  .feature-card { padding: 20px 16px; }

  /* Калькулятор */
  .calculator { padding: 24px 16px; border-radius: 16px; }
  .calculator__title { font-size: 22px; }

  /* Отзывы */
  .review-card { padding: 20px 16px; }

  /* Консультация */
  .consultation-block__info { padding: var(--spacing-md); }
  .consultation-block__form { padding: var(--spacing-md); }
}