/* ============================================
   ГРАНДШИНА — Header Styles
   CSS Variables for full customization
   ============================================ */

:root {
  /* Colors */
  --header-bg: #1a1a2e;
  --header-text: #ffffff;
  --header-icon-color: #ffffff;
  --header-hover-color: #e94560;
  --header-phone-color: #e94560;
  --header-badge-bg: #e94560;
  --header-badge-text: #ffffff;
  --header-dropdown-bg: #16213e;
  --header-dropdown-border: #0f3460;
  --header-search-bg: #16213e;
  --header-search-border: #0f3460;

  /* Typography */
  --header-font: 'Roboto', 'Segoe UI', Arial, sans-serif;
  --header-font-size: 15px;
  --header-font-weight: 500;
  --header-logo-font-size: 24px;
  --header-logo-font-weight: 700;
  --header-phone-font-size: 16px;
  --header-phone-font-weight: 600;

  /* Spacing */
  --header-padding-y: 15px;
  --header-padding-x: 30px;
  --header-nav-item-padding: 12px 18px;
  --header-icon-size: 24px;
  --header-icon-gap: 20px;
  --header-dropdown-padding: 20px;
  --header-dropdown-item-padding: 10px 0;

  /* Transitions */
  --header-transition: 0.3s ease;
}

/* ============================================
   Reset & Base
   ============================================ */

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

body {
  font-family: var(--header-font);
  font-size: var(--header-font-size);
  color: #333;
  min-height: 200vh; /* For scroll testing */
}

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

ul {
  list-style: none;
}

/* ============================================
   Header Container
   ============================================ */

.grandshina-header {
  background-color: var(--header-bg);
  color: var(--header-text);
  font-family: var(--header-font);
  font-size: var(--header-font-size);
  font-weight: var(--header-font-weight);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--header-padding-y) var(--header-padding-x);
  max-width: 1400px;
  margin: 0 auto;
  gap: 20px;
}

/* ============================================
   Logo
   ============================================ */

.header-logo {
  flex-shrink: 0;
}

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

.header-logo img {
  height: 45px;
  width: auto;
  object-fit: contain;
}

.header-logo-text {
  font-size: var(--header-logo-font-size);
  font-weight: var(--header-logo-font-weight);
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--header-text);
}

.header-logo-text span {
  color: var(--header-hover-color);
}

/* ============================================
   Navigation
   ============================================ */

.header-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.header-nav ul {
  display: flex;
  align-items: center;
  gap: 5px;
}

.header-nav > ul > li {
  position: relative;
}

.header-nav > ul > li > a {
  display: block;
  padding: var(--header-nav-item-padding);
  color: var(--header-text);
  transition: color var(--header-transition), border-bottom var(--header-transition);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.header-nav > ul > li > a:hover,
.header-nav > ul > li > a.active {
  color: var(--header-hover-color);
  border-bottom-color: var(--header-hover-color);
}

/* ============================================
   Mega Menu Dropdown
   ============================================ */

.header-nav .has-dropdown > a::after {
  content: ' ▾';
  font-size: 10px;
  margin-left: 5px;
  transition: transform var(--header-transition);
}

.header-nav .has-dropdown:hover > a::after {
  transform: rotate(180deg);
}

.mega-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background-color: var(--header-dropdown-bg);
  border: 1px solid var(--header-dropdown-border);
  border-radius: 0 0 8px 8px;
  padding: var(--header-dropdown-padding);
  min-width: 600px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 25px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--header-transition), transform var(--header-transition), visibility var(--header-transition);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  z-index: 100;
}

.has-dropdown:hover .mega-dropdown,
.has-dropdown.mobile-open .mega-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.mega-dropdown .dropdown-category h4 {
  color: var(--header-hover-color);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--header-dropdown-border);
}

.mega-dropdown .dropdown-category ul li {
  margin-bottom: 4px;
}

.mega-dropdown .dropdown-category ul li a {
  display: block;
  padding: var(--header-dropdown-item-padding);
  color: var(--header-text);
  font-size: 13px;
  font-weight: 400;
  transition: color var(--header-transition), padding-left var(--header-transition);
  border-radius: 4px;
}

.mega-dropdown .dropdown-category ul li a:hover {
  color: var(--header-hover-color);
  padding-left: 12px;
}

/* ============================================
   Header Actions (Icons + Phone)
   ============================================ */

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--header-icon-gap);
  flex-shrink: 0;
}

.header-actions .action-icon {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  cursor: pointer;
  transition: color var(--header-transition), transform var(--header-transition);
  color: var(--header-icon-color);
}

.header-actions .action-icon:hover {
  color: var(--header-hover-color);
  transform: scale(1.1);
}

.header-actions .action-icon svg {
  width: var(--header-icon-size);
  height: var(--header-icon-size);
}

/* Cart Badge */

.cart-count {
  position: absolute;
  top: -4px;
  right: -8px;
  background-color: var(--header-badge-bg);
  color: var(--header-badge-text);
  font-size: 10px;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

/* Phone */

.header-phone {
  color: var(--header-phone-color);
  font-size: var(--header-phone-font-size);
  font-weight: var(--header-phone-font-weight);
  white-space: nowrap;
  transition: color var(--header-transition);
}

.header-phone:hover {
  color: var(--header-hover-color);
}

/* ============================================
   Search Bar
   ============================================ */

.header-search {
  position: relative;
}

.header-search .search-input-wrapper {
  position: absolute;
  top: calc(100% + var(--header-padding-y));
  right: 0;
  background-color: var(--header-search-bg);
  border: 1px solid var(--header-search-border);
  border-radius: 0 0 8px 8px;
  padding: 15px;
  display: flex;
  gap: 10px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--header-transition), transform var(--header-transition), visibility var(--header-transition);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  z-index: 100;
}

.header-search.is-open .search-input-wrapper {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.header-search input {
  background-color: var(--header-bg);
  border: 1px solid var(--header-dropdown-border);
  color: var(--header-text);
  padding: 10px 15px;
  border-radius: 4px;
  font-size: 14px;
  font-family: var(--header-font);
  width: 250px;
  outline: none;
  transition: border-color var(--header-transition);
}

.header-search input:focus {
  border-color: var(--header-hover-color);
}

.header-search input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.header-search button {
  background-color: var(--header-hover-color);
  color: var(--header-text);
  border: none;
  padding: 10px 20px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  font-family: var(--header-font);
  font-weight: 500;
  transition: background-color var(--header-transition);
}

.header-search button:hover {
  background-color: #d63a52;
}

/* ============================================
   Hamburger Button
   ============================================ */

.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
  color: var(--header-text);
  transition: color var(--header-transition);
}

.hamburger-btn:hover {
  color: var(--header-hover-color);
}

.hamburger-btn svg {
  width: 28px;
  height: 28px;
}

/* ============================================
   Desktop Styles (>1024px)
   ============================================ */

@media (min-width: 1025px) {
  .hamburger-btn {
    display: none;
  }

  .header-nav {
    display: flex !important;
    position: static;
    width: auto;
    background: none;
    box-shadow: none;
  }

  .mega-dropdown {
    display: grid;
  }
}

/* ============================================
   Tablet Styles (768px – 1024px)
   ============================================ */

@media (max-width: 1024px) {
  :root {
    --header-padding-y: 10px;
    --header-padding-x: 20px;
    --header-nav-item-padding: 8px 12px;
    --header-icon-gap: 15px;
    --header-logo-font-size: 20px;
    --header-phone-font-size: 14px;
    --header-icon-size: 20px;
  }

  .header-top {
    flex-wrap: nowrap;
  }

  .header-nav ul {
    gap: 2px;
  }

  .mega-dropdown {
    min-width: 500px;
    grid-template-columns: repeat(2, 1fr);
    padding: 15px;
  }

  .mega-dropdown .dropdown-category ul li a {
    font-size: 12px;
  }

  .header-logo img {
    height: 38px;
  }
}

/* ============================================
   Mobile Styles (<768px)
   ============================================ */

@media (max-width: 768px) {
  :root {
    --header-padding-y: 10px;
    --header-padding-x: 15px;
    --header-icon-gap: 12px;
    --header-logo-font-size: 18px;
    --header-phone-font-size: 13px;
    --header-icon-size: 20px;
  }

  .hamburger-btn {
    display: flex;
  }

  .header-top {
    flex-wrap: wrap;
  }

  .header-logo {
    order: 1;
  }

  .header-actions {
    order: 2;
    gap: var(--header-icon-gap);
  }

  .hamburger-btn {
    order: 3;
    margin-left: auto;
  }

  /* Mobile Navigation */
  .header-nav {
    display: none;
    order: 4;
    width: 100%;
    background-color: var(--header-dropdown-bg);
    border-top: 1px solid var(--header-dropdown-border);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  }

  .header-nav.is-open {
    display: block;
  }

  .header-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .header-nav > ul > li > a {
    padding: 15px 20px;
    border-bottom: 1px solid var(--header-dropdown-border);
    border-left: 3px solid transparent;
  }

  .header-nav > ul > li > a:hover,
  .header-nav > ul > li > a.active {
    border-bottom-color: var(--header-dropdown-border);
    border-left-color: var(--header-hover-color);
    background-color: rgba(255, 255, 255, 0.05);
  }

  /* Mobile Mega Menu */
  .mega-dropdown {
    position: static;
    transform: none;
    min-width: auto;
    grid-template-columns: 1fr;
    padding: 0;
    background-color: transparent;
    border: none;
    box-shadow: none;
    border-radius: 0;
    display: none;
    gap: 0;
  }

  .has-dropdown.mobile-open .mega-dropdown {
    display: grid;
  }

  .has-dropdown > a::after {
    content: ' ▸';
    float: right;
    line-height: 1.8;
  }

  .has-dropdown.mobile-open > a::after {
    content: ' ▾';
  }

  .mega-dropdown .dropdown-category {
    padding: 0;
  }

  .mega-dropdown .dropdown-category h4 {
    padding: 12px 20px;
    margin-bottom: 0;
    border-bottom: none;
    background-color: rgba(0, 0, 0, 0.2);
  }

  .mega-dropdown .dropdown-category ul li a {
    padding: 10px 20px 10px 35px;
    font-size: 14px;
  }

  .header-search .search-input-wrapper {
    right: -15px;
    left: -15px;
    flex-direction: column;
  }

  .header-search input {
    width: 100%;
  }

  .header-phone {
    font-size: var(--header-phone-font-size);
  }

  .header-logo img {
    height: 32px;
  }

  .cart-count {
    font-size: 9px;
    min-width: 16px;
    height: 16px;
    top: -2px;
    right: -6px;
  }
}

/* ============================================
   Utility Classes
   ============================================ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}