/* ==========================================================================
   CASPIAN SUN — CORE STYLES (VARIABLES, HEADER, FOOTER, BUTTONS)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-main: #0E0F10;
  --bg-main-rgb: 14, 15, 16;
  --bg-panel: #E8DECF;
  --bg-panel-rgb: 232, 222, 207;
  --accent-teal: #6B8F93;
  --accent-gold: #D4A85A;

  --text-light: #F4F4F4;
  --text-muted: #8E9296;
  --text-dark: #121315;
  --text-dark-muted: #55575A;
  --border-dark: rgba(255, 255, 255, 0.1);
  --border-light: rgba(0, 0, 0, 0.08);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --container-max-width: 1440px;
  --radius-sm: 2px;
  --radius-md: 4px;
  --transition: all 0.25s ease-in-out;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-main);
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-light);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a, a:focus, button:focus {
  outline: none;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

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

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 2.5rem;
  }
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(14, 15, 16, 0.95);
  backdrop-filter: blur(12px);
  padding: 1.25rem 0;
  border: none; 
}

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

.header__brand {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  justify-self: start;
}

.header__logo-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Скрываем старые текстовые логотипы, если они остались в кэше */
.header__logo {
  display: none;
}

/* --- Логотипы в шапке и подвале --- */
.header__logo-img {
  height: 50px;
  width: auto;
  display: block;
}

@media (min-width: 1024px) {
  .header__logo-img {
    height: 50px;
  }
}

.footer__logo-img {
  height: 50px;
  width: auto;
  display: block;
  margin-bottom: 0.5rem;
}

.header__line {
  display: none;
}

.header__tagline {
  font-size: 0.625rem;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.header__burger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 16px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.header__burger-bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-light);
  border-radius: 1px;
  transition: var(--transition);
}

.header__spacer {
  display: none;
}

/* Стили кнопки корзины в шапке */
.header-cart-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-light);
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.header-cart-link:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.header-cart-link svg {
  width: 16px;
  height: 16px;
}

.header-cart-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  font-size: 0.6875rem;
  font-weight: 700;
  background-color: var(--accent-gold);
  color: #121315;
  border-radius: 99px;
}

.header__nav {
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  height: calc(100vh - 72px);
  background-color: var(--bg-main);
  padding: 2rem 1.5rem;
  transform: translateX(-100%);
  transition: transform 0.3s ease-in-out;
  overflow-y: auto;
}

.header__nav.header__nav--open {
  transform: translateX(0);
}

.header__nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.header__nav-link,
.header__dropdown-btn {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-light);
  opacity: 0.8;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  line-height: 1;
  padding: 0.25rem 0;
  transition: var(--transition);
}

.header__nav-link:hover,
.header__dropdown-btn:hover,
.header__nav-link--active {
  opacity: 1;
  color: var(--accent-gold);
}

.header__dropdown-arrow {
  width: 8px;
  height: 6px;
  stroke: currentColor;
  stroke-width: 1.5;
  fill: none;
  transition: transform 0.25s ease;
}

.header__dropdown-menu {
  list-style: none;
  display: none;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.75rem 0 0.5rem 1rem;
}

.header__dropdown.header__dropdown--open .header__dropdown-menu {
  display: flex;
}

.header__dropdown.header__dropdown--open .header__dropdown-arrow {
  transform: rotate(180deg);
}

.header__dropdown-link {
  font-size: 0.8125rem;
  color: var(--text-muted);
  transition: var(--transition);
}

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

.header__dropdown-link--active {
  color: var(--accent-gold) !important;
  font-weight: 500;
}

@media (min-width: 1024px) {
  .header {
    padding: 1.5rem 0;
  }

  .header__burger,
  .header-cart-mobile-item {
    display: none;
  }

  .header__container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
  }

  .header__nav {
    position: static;
    width: auto;
    height: auto;
    padding: 0;
    background: transparent;
    transform: none;
    overflow: visible;
    justify-self: center;
  }

  .header__nav-list {
    flex-direction: row;
    align-items: center;
    gap: 2.25rem;
    margin-top: 2px;
  }

  .header__nav-link,
  .header__dropdown-btn {
    font-size: 0.75rem;
    letter-spacing: 0.09em;
    text-transform: uppercase;
  }

  .header__dropdown {
    position: relative;
    padding: 0.5rem 0;
  }

  .header__dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 220px;
    background-color: rgba(18, 19, 21, 0.98);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-dark);
    padding: 0.75rem 0;
    border-radius: var(--radius-sm);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    display: flex;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }

  .header__dropdown:hover .header__dropdown-menu {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
  }

  .header__dropdown:hover .header__dropdown-arrow {
    transform: rotate(180deg);
  }

  .header__dropdown-item {
    width: 100%;
  }

  .header__dropdown-link {
    display: block;
    padding: 0.55rem 1.25rem;
    font-size: 0.75rem;
    color: var(--text-muted);
  }

  .header__dropdown-link:hover,
  .header__dropdown-link--active {
    color: var(--text-light);
    background-color: rgba(255, 255, 255, 0.04);
  }

  .header__spacer {
    display: block;
    justify-self: end;
  }
}

/* ==========================================================================
   BUTTONS & COMMON UI
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  gap: 1.5rem;
  border: 1px solid transparent; 
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease, color 0.25s ease;
  will-change: transform;
}

.btn:hover {
  transform: scale(1.04);
  border-color: var(--accent-gold);
  box-shadow: 0 0 16px rgba(212, 168, 90, 0.22);
}

.btn:active {
  transform: scale(0.98);
}

.btn-arrow {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  transition: transform 0.25s ease, stroke 0.25s ease;
}

.btn:hover .btn-arrow {
  transform: translateX(5px);
  stroke: var(--accent-gold);
}

.btn--teal {
  background-color: var(--accent-teal);
  color: #FFFFFF;
}

.btn--teal:hover {
  background-color: #5a7b7e;
}

.btn--outline-light {
  border-color: var(--border-dark);
  color: var(--text-light);
  background: transparent;
}

.btn--outline-light:hover {
  background: rgba(255, 255, 255, 0.03);
}

.btn--outline-glass {
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--text-light);
  background: rgba(14, 15, 16, 0.4);
  backdrop-filter: blur(8px);
}

.btn--outline-glass:hover {
  background: rgba(14, 15, 16, 0.75);
}

.btn--gold {
  background-color: var(--accent-gold);
  color: #121315;
  border-color: transparent;
}

.btn--gold:hover {
  background-color: #E2B86E;
  box-shadow: 0 0 16px rgba(212, 168, 90, 0.4);
}

/* ==========================================================================
   FOOTER (ЛАКОНИЧНЫЙ ПОДВАЛ: УЖАТЫ КРАЯ, ШРИФТ +10%)
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-dark);
  padding: 2.25rem 0;
  background-color: var(--bg-main);
}

.footer .container {
  max-width: 1240px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1.15fr 2fr;
    gap: 2.5rem;
  }
}

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

.footer__logo-row {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  margin-bottom: 0.45rem;
}

.footer__logo {
  font-size: 1.65rem;
  font-weight: 500;
  color: var(--text-light);
}

.footer__year {
  font-size: 0.825rem;
  color: var(--accent-gold);
}

.footer__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.55;
  max-width: 310px;
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

@media (min-width: 640px) {
  .footer__nav {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer__col-title {
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 0.85rem;
  font-weight: 600;
}

.footer__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer__link {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer__link--strong {
  color: var(--text-light);
  font-weight: 500;
}

.footer__link:hover {
  color: var(--accent-gold);
}

.footer__messengers {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
}

/* ==========================================================================
   КОНТРАСТНЫЕ ИКОНКИ ТЕХ. ХАРАКТЕРИСТИК И МОНОХРОМНЫЕ БРЕНДЫ ИНВЕРТОРОВ
   ========================================================================== */
.product-drawer__features svg,
.pdp-features svg,
.accordion__header svg,
.kb-dict-card__icon svg,
[class*="spec"] svg,
[class*="metric"] svg {
  color: var(--bg-panel) !important;
  stroke: var(--bg-panel) !important;
}

/* Асимметричная сетка брендов инверторов (Большой DAH Solar + 5 брендов снизу) */
.inverter-brands-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (min-width: 640px) {
  .inverter-brands-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.inverter-brand-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 90px;
  transition: var(--transition);
}

.inverter-brand-card--featured {
  grid-column: 1 / -1;
  min-height: 130px;
  background: rgba(232, 222, 207, 0.06);
  border-color: rgba(212, 168, 90, 0.35);
}

.inverter-brand-card img {
  max-height: 36px;
  width: auto;
  object-fit: contain;
  filter: grayscale(100%) brightness(1.8);
  opacity: 0.85;
  transition: var(--transition);
}

.inverter-brand-card--featured img {
  max-height: 56px;
  opacity: 1;
}

.inverter-brand-card:hover {
  border-color: var(--accent-gold);
  background: rgba(255, 255, 255, 0.06);
}

.inverter-brand-card:hover img {
  opacity: 1;
  transform: scale(1.05);
}

.inverter-brand-card__name {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

body.no-scroll {
  overflow: hidden;
  touch-action: none;
}