/*
  Solarkits Main Stylesheet
  Mobile-first, performance-optimized CSS
*/

/* ==================== CSS RESET & BASE ==================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Roobert', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

/* ==================== CSS VARIABLES ==================== */
:root {
  /* Colors - Sunrun inspired */
  --color-primary: rgb(31, 38, 71);
  --color-primary-dark: rgb(21, 26, 51);
  --color-secondary: #4CAF50;
  --color-accent: rgb(31, 38, 71);

  /* Brand Colors */
  --color-amazon: #FF9900;
  --color-aliexpress: #E52B50;

  /* Neutrals */
  --color-bg: #FFFFFF;
  --color-bg-secondary: #F5F5F5;
  --color-text: rgba(0, 0, 0, 0.87);
  --color-text-light: rgb(31, 38, 71);
  --color-text-lighter: #999999;
  --color-border: #E0E0E0;

  /* Semantic Colors */
  --color-success: #4CAF50;
  --color-warning: #FF9800;
  --color-error: #F44336;
  --color-info: #2196F3;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.2);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-image-lg: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Layout */
  --container-max-width: 1200px;
  --header-height: 70px;
}

/* ==================== UTILITIES ==================== */

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

.sr-only-focusable:focus,
.sr-only-focusable:active {
  position: static;
  width: auto;
  height: auto;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* Skip to Content Link - Accessibility */
.skip-to-content {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  padding: 1rem 1.5rem;
  background-color: var(--color-secondary);
  color: white;
  text-decoration: none;
  font-weight: 600;
  border-radius: 0 0 var(--radius-sm) 0;
  transition: all var(--transition-fast);
}

.skip-to-content:focus {
  left: 0;
  outline: 3px solid var(--color-text);
  outline-offset: 2px;
}

/* Enhanced Focus Indicators - Accessibility */
*:focus {
  outline: none;
}

*:focus-visible {
  outline: 3px solid var(--color-secondary);
  outline-offset: 2px;
  transition: outline var(--transition-fast);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-secondary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.2);
}

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

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-xl);
  }
}

/* ==================== TYPOGRAPHY ==================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.1;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

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

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

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

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  text-align: center;
  border: 2px solid transparent;
  min-height: 44px;
  gap: var(--spacing-sm);
}

.btn--primary {
  background-color: white;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn--primary:hover {
  background-color: var(--color-primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--amazon {
  background-color: var(--color-amazon);
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.btn--amazon:hover {
  background-color: #e88a00;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--aliexpress {
  background-color: var(--color-aliexpress);
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.btn--aliexpress:hover {
  background-color: #c41e3f;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--amazon svg,
.btn--aliexpress svg {
  vertical-align: middle;
}

.btn--outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background-color: transparent;
}

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

/* ==================== HEADER & NAVIGATION ==================== */
.header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-bg);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  height: var(--header-height);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.nav__logo .logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.logo__icon {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
  flex-shrink: 0;
  display: block;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav__link {
  font-weight: 500;
  color: var(--color-text);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.nav__link:hover {
  color: var(--color-primary);
  background-color: var(--color-bg-secondary);
}

.nav__link--active {
  color: var(--color-primary);
  font-weight: 600;
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: calc(var(--spacing-sm) - 2px);
}

/* Search in Navigation */
.nav__search {
  display: flex;
  align-items: center;
  position: relative;
}

.search__input {
  padding: var(--spacing-sm) var(--spacing-md);
  padding-right: 40px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  width: 250px;
  transition: all var(--transition-base);
}

.search__input:focus {
  outline: none;
  border-color: var(--color-primary);
  width: 300px;
}

.search__button {
  position: absolute;
  right: var(--spacing-sm);
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
  border-radius: 50%;
  transition: all var(--transition-base);
}

.search__button:hover {
  color: var(--color-primary);
  background-color: var(--color-bg-secondary);
}

/* Mobile Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav__toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

/* ==================== HERO SECTION ==================== */
.hero {
  background: linear-gradient(135deg, rgb(31, 38, 71) 0%, rgb(45, 55, 95) 100%);
  color: white;
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.hero__content {
  max-width: 700px;
  margin: 0 auto;
}

.hero__title {
  font-size: clamp(2rem, 6vw, 3.5rem);
  margin-bottom: var(--spacing-lg);
  color: white;
}

.hero__description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
}

.hero .btn--primary {
  background-color: white;
  color: var(--color-primary);
  font-size: 1.125rem;
  padding: var(--spacing-md) var(--spacing-2xl);
  border: 2px solid white;
}

.hero .btn--primary:hover {
  background-color: transparent;
  color: white;
  border-color: white;
  transform: scale(1.05);
}

/* ==================== PAGE HEADER (CATEGORY PAGES) ==================== */
.page-header {
  background: linear-gradient(135deg, rgb(31, 38, 71) 0%, rgb(45, 55, 95) 100%);
  color: white;
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.page-header__title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--spacing-md);
  color: white;
}

.page-header__description {
  font-size: clamp(1rem, 2vw, 1.125rem);
  max-width: 700px;
  margin: 0 auto;
  opacity: 0.95;
}

/* ==================== SECTIONS ==================== */
section {
  padding: var(--spacing-3xl) 0;
}

.section__title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  position: relative;
}

.section__title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--color-secondary);
  border-radius: var(--radius-sm);
}

/* ==================== CATEGORIES ==================== */
.categories {
  background-color: var(--color-bg-secondary);
}

.categories__grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
  max-width: 900px;
  margin: 0 auto;
}

.category-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: white;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition-base);
  min-height: 44px;
}

.category-btn:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.category-btn--active {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.category-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.category-link {
  font-size: 0.875rem;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.category-link:hover {
  color: var(--color-primary-dark);
  transform: translateX(2px);
}

.section__subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1rem;
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

/* ==================== PRODUCTS SECTION ==================== */
/* Price Disclaimer Banner */
.price-disclaimer {
  background: linear-gradient(135deg, #fff8e1 0%, #ffe082 100%);
  border-bottom: 2px solid var(--color-accent);
  padding: var(--spacing-md) 0;
  margin-bottom: var(--spacing-xl);
}

.price-disclaimer .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.price-disclaimer__icon {
  color: var(--color-warning);
  flex-shrink: 0;
}

.price-disclaimer__text {
  color: var(--color-text);
  font-size: 0.9rem;
  margin: 0;
  text-align: center;
  line-height: 1.5;
}

.price-disclaimer__text strong {
  color: var(--color-text);
}

@media (max-width: 768px) {
  .price-disclaimer .container {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-xs);
  }

  .price-disclaimer__text {
    font-size: 0.85rem;
  }
}

.products__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.products__info {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

/* Product Card */
.product-card {
  background-color: white;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-card__image-wrapper {
  position: relative;
  padding-top: 75%;
  background-color: var(--color-bg-secondary);
  overflow: hidden;
}

.product-card__image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card__image {
  transform: scale(1.05);
}

.product-card__badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--color-error);
  color: white;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.product-card__content {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card__category {
  font-size: 0.75rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-sm);
}

.product-card__title {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-card__price {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
}

.product-card__price-date {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--color-text-light);
  margin-top: var(--spacing-xs);
  display: block;
}

.product-card__cta {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: auto;
}

.product-card__cta .btn {
  flex: 1;
  font-size: 0.875rem;
  padding: var(--spacing-sm) var(--spacing-md);
}

/* Loading State */
.loading {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl);
  gap: var(--spacing-lg);
  color: var(--color-text-light);
}

.loading__spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--color-bg-secondary);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* No Results */
.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--spacing-3xl);
  color: var(--color-text-light);
}

.no-results svg {
  margin: 0 auto var(--spacing-lg);
  opacity: 0.3;
}

.no-results h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

/* ==================== DISCLAIMER BANNER ==================== */
.disclaimer-banner {
  background-color: var(--color-bg-secondary);
  border-top: 2px solid var(--color-border);
  border-bottom: 2px solid var(--color-border);
  padding: var(--spacing-lg) 0;
}

.disclaimer-banner__content {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  max-width: 900px;
  margin: 0 auto;
}

.disclaimer-banner__content svg {
  flex-shrink: 0;
  color: var(--color-warning);
}

.disclaimer-banner__content p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.disclaimer-banner__content strong {
  color: var(--color-text);
}

/* ==================== FOOTER ==================== */
.footer {
  background-color: var(--color-text);
  color: white;
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer__grid {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}

.footer__column {
  flex: 0 1 auto;
  min-width: 200px;
}

.footer__column:first-child {
  flex: 1 1 300px;
  max-width: 350px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.footer__logo .logo__icon {
  width: 40px;
  height: 40px;
  filter: brightness(0) invert(1);
}

.footer__description {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer__title {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
  color: white;
  font-weight: 600;
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__links a {
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-base);
}

.footer__links a:hover {
  color: white;
  padding-left: var(--spacing-sm);
}

.footer__newsletter-text {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-md);
}

.newsletter-form {
  display: flex;
  gap: var(--spacing-sm);
}

.newsletter__input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
}

.newsletter__input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.newsletter__input:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: rgba(255, 255, 255, 0.15);
}

.newsletter__button {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-secondary);
  color: white;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: all var(--transition-base);
}

.newsletter__button:hover {
  background-color: #43a047;
  transform: translateY(-2px);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer__copyright,
.footer__disclaimer {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ==================== SCROLL TO TOP BUTTON ==================== */
.scroll-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 50px;
  height: 50px;
  background-color: var(--color-secondary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 999;
}

.scroll-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background-color: #43a047;
  transform: translateY(-5px);
}

/* ==================== BLOG IMAGE OPTIMIZATION ==================== */
/* Featured Image - 16:9 aspect ratio (Sunrun-style) */
.blog-post__featured-image {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto var(--spacing-xl);
  border-radius: var(--radius-image-lg);
  overflow: hidden;
}

.blog-post__featured-image img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

/* Blog Content Inline Images */
.blog-post__content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: var(--spacing-xl) auto;
  display: block;
}

/* Blog Card Featured Images */
.blog-card__image img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  transition: transform var(--transition-slow);
}

.blog-card__link:hover .blog-card__image img {
  transform: scale(1.05);
}

/* Admin guidance comment */
/* Recommended image sizes:
   - Featured images: 1200x675px (16:9 ratio)
   - Inline images: 800px width minimum
   - Thumbnails: 400x225px (16:9 ratio)
*/

/* ==================== RESPONSIVE DESIGN ==================== */

/* Ultra-narrow screens - Foldable devices (folded mode: 280-360px) */
@media (max-width: 360px) {
  .container {
    padding: 0 0.75rem;
  }

  .products__grid {
    grid-template-columns: 1fr !important;
    gap: 0.75rem;
  }

  .nav__list {
    font-size: 0.875rem;
    gap: 0.5rem;
  }

  .nav__logo .logo__text {
    font-size: 1.25rem;
  }

  .hero__title {
    font-size: 1.75rem;
  }

  .hero__description {
    font-size: 0.9375rem;
  }

  .product-card {
    padding: 0.75rem;
  }

  .btn {
    font-size: 0.875rem;
    padding: 0.625rem 1rem;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .category-btn {
    font-size: 0.875rem;
    padding: 0.625rem 1rem;
  }
}

/* Foldable unfolded + small tablets (768-920px) */
@media (min-width: 768px) and (max-width: 920px) {
  .products__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

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

  .categories__grid {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .category-btn {
    flex: 1 1 calc(50% - 0.75rem);
    min-width: 140px;
  }
}

/* Mobile landscape optimization */
@media (max-height: 500px) and (orientation: landscape) {
  .hero {
    padding: 1.5rem 0;
  }

  .hero__title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
  }

  .hero__description {
    margin-bottom: 1rem;
    font-size: 1rem;
  }

  .page-header {
    padding: 1.5rem 0;
  }
}

/* High DPI displays - Optimize image rendering */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .product-card__image,
  img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* Tablet */
@media (max-width: 992px) {
  .products__grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
  }
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: white;
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    transition: left var(--transition-slow);
    overflow-y: auto;
  }

  .nav__menu.show {
    left: 0;
  }

  .nav__list {
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-md);
  }

  .nav__link {
    display: block;
    width: 100%;
    padding: var(--spacing-md);
    text-align: center;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
  }

  .nav__search {
    width: 100%;
  }

  .search__input {
    width: 100%;
  }

  .search__input:focus {
    width: 100%;
  }

  .products__grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }

  .hero {
    padding: var(--spacing-2xl) 0;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .products__grid {
    grid-template-columns: 1fr;
  }

  .product-card__cta {
    flex-direction: column;
  }

  .categories__grid {
    flex-direction: column;
  }

  .category-btn {
    width: 100%;
  }
}

/* ==================== NOTIFICATION SYSTEM ==================== */
.notification-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: 400px;
  pointer-events: none;
}

.notification {
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  transform: translateX(500px);
  opacity: 0;
  transition: all var(--transition-base);
  pointer-events: auto;
  border-left: 4px solid var(--color-primary);
  max-width: 400px;
  word-wrap: break-word;
}

.notification.show {
  transform: translateX(0);
  opacity: 1;
}

.notification.hide {
  transform: translateX(500px);
  opacity: 0;
}

.notification__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: bold;
  color: white;
}

.notification__content {
  flex: 1;
  min-width: 0;
}

.notification__title {
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.notification__message {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

.notification__close {
  flex-shrink: 0;
  background: none;
  border: none;
  color: var(--color-text-lighter);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.notification__close:hover {
  color: var(--color-text);
}

/* Notification Types */
.notification--success {
  border-left-color: var(--color-success);
}

.notification--success .notification__icon {
  background-color: var(--color-success);
}

.notification--error {
  border-left-color: var(--color-error);
}

.notification--error .notification__icon {
  background-color: var(--color-error);
}

.notification--warning {
  border-left-color: var(--color-warning);
}

.notification--warning .notification__icon {
  background-color: var(--color-warning);
}

.notification--info {
  border-left-color: var(--color-info);
}

.notification--info .notification__icon {
  background-color: var(--color-info);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .notification-container {
    top: 10px;
    right: 10px;
    left: 10px;
    max-width: none;
  }

  .notification {
    max-width: none;
  }
}

/* ==================== LIGHTBOX GALLERY ==================== */
/* Clickable product image */
.product-card__image--clickable {
  cursor: pointer;
  transition: transform var(--transition-base);
}

.product-card__image--clickable:hover {
  transform: scale(1.05);
}

/* Lightbox overlay */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  z-index: 10000;
  align-items: center;
  justify-content: center;
}

.lightbox--active {
  display: flex;
}

/* Lightbox image */
.lightbox__image {
  max-width: 90%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
}

/* Close button */
.lightbox__close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 3rem;
  color: white;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 10001;
  transition: all var(--transition-base);
  line-height: 1;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__close:hover {
  color: var(--color-primary);
  transform: scale(1.1);
}

/* Navigation buttons */
.lightbox__prev,
.lightbox__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 3rem;
  color: white;
  background-color: rgba(0, 0, 0, 0.5);
  border: 2px solid rgba(255, 255, 255, 0.3);
  cursor: pointer;
  padding: 10px 20px;
  z-index: 10001;
  transition: all var(--transition-base);
  border-radius: var(--radius-sm);
}

.lightbox__prev {
  left: 30px;
}

.lightbox__next {
  right: 30px;
}

.lightbox__prev:hover,
.lightbox__next:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-50%) scale(1.1);
}

.lightbox__nav--hidden {
  display: none;
}

/* Image counter */
.lightbox__counter {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  color: white;
  background-color: rgba(0, 0, 0, 0.7);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  z-index: 10001;
}

/* Mobile responsive lightbox */
@media (max-width: 768px) {
  .lightbox__image {
    max-width: 95%;
    max-height: 85vh;
  }

  .lightbox__close {
    top: 10px;
    right: 10px;
    font-size: 2rem;
    width: 40px;
    height: 40px;
  }

  .lightbox__prev,
  .lightbox__next {
    font-size: 2rem;
    padding: 8px 15px;
  }

  .lightbox__prev {
    left: 10px;
  }

  .lightbox__next {
    right: 10px;
  }

  .lightbox__counter {
    bottom: 20px;
    font-size: 0.8rem;
  }
}

/* Print Styles */
@media print {
  .header,
  .nav__toggle,
  .scroll-top,
  .footer,
  .lightbox {
    display: none;
  }
}

/* ==================== BLOG STYLES ==================== */

/* Blog Section */
.blog-section {
  padding: var(--spacing-3xl) 0;
}

/* Blog Filter */
.blog-filter {
  margin-bottom: var(--spacing-2xl);
}

.blog-filter__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

.blog-filter__btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: white;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  font-weight: 500;
  color: var(--color-text);
  font-size: 0.9375rem;
  transition: all var(--transition-base);
  min-height: 44px;
  cursor: pointer;
}

.blog-filter__btn:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.blog-filter__btn--active {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* Blog Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

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

/* Blog Card */
.blog-card {
  background-color: white;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.blog-card__link {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
}

.blog-card__image {
  position: relative;
  padding-top: 56.25%; /* 16:9 aspect ratio */
  background-color: var(--color-bg-secondary);
  overflow: hidden;
}

.blog-card__image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-image-lg);
  transition: transform var(--transition-slow);
}

.blog-card:hover .blog-card__image img {
  transform: scale(1.05);
}

.blog-card__category {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--color-secondary);
  color: white;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.blog-card__content {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card__excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.8125rem;
  color: var(--color-text-lighter);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.blog-card__date,
.blog-card__author {
  display: flex;
  align-items: center;
  gap: 4px;
}

.blog-card__date svg,
.blog-card__author svg {
  flex-shrink: 0;
}

.blog-card__read-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.875rem;
  transition: gap var(--transition-fast);
}

.blog-card:hover .blog-card__read-more {
  gap: 8px;
}

/* Blog Post Page */
.container--narrow {
  max-width: 1100px;
}

.breadcrumb {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-md) 0;
  margin-bottom: var(--spacing-xl);
}

.breadcrumb__list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.breadcrumb__item:not(:last-child)::after {
  content: '/';
  color: var(--color-text-lighter);
  margin-left: var(--spacing-sm);
}

.breadcrumb__item a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

.breadcrumb__item a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.breadcrumb__item--active {
  color: var(--color-text);
  font-weight: 500;
}

.blog-post {
  padding-bottom: var(--spacing-3xl);
}

.blog-post__back {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-primary);
  font-weight: 500;
  font-size: 0.9375rem;
  margin-bottom: var(--spacing-xl);
  transition: all var(--transition-fast);
}

.blog-post__back:hover {
  gap: var(--spacing-md);
  color: var(--color-primary-dark);
}

.blog-post__back svg {
  flex-shrink: 0;
}

.blog-post__header {
  margin-bottom: var(--spacing-2xl);
}

.blog-post__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
  font-size: 0.875rem;
}

.blog-post__category {
  background-color: var(--color-secondary);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 0.75rem;
}

.blog-post__date,
.blog-post__author {
  color: var(--color-text-light);
}

.blog-post__title {
  font-size: clamp(1.75rem, 4vw, 3.5rem);
  margin-bottom: var(--spacing-xl);
  line-height: 1.1;
  font-weight: 500;
}

.blog-post__meta-section {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid var(--color-border);
}

.blog-post__share-header {
  text-align: right;
}

.blog-post__share-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-sm);
}

.social-share--compact {
  display: flex;
  gap: var(--spacing-sm);
}

.social-share--compact .social-share__btn {
  padding: var(--spacing-sm);
  min-height: auto;
  border: none;
  background-color: transparent;
}

.social-share--compact .social-share__btn:hover {
  transform: translateY(-2px);
  background-color: var(--color-bg-secondary);
  border-radius: 50%;
}

.blog-post__excerpt {
  font-size: 1.125rem;
  color: var(--color-text-light);
  line-height: 1.6;
  max-width: 700px;
  margin: 0 auto;
}

.blog-post__featured-image {
  margin-bottom: var(--spacing-2xl);
  border-radius: var(--radius-image-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.blog-post__featured-image img {
  width: 100%;
  height: auto;
  display: block;
}

.blog-post__content {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--spacing-3xl);
}

.blog-post__content h2 {
  margin-top: var(--spacing-2xl);
  margin-bottom: 12px;
  font-size: 2.5rem;
  font-weight: 500;
  line-height: 1.1;
  color: var(--color-text);
}

.blog-post__content h3 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  font-size: 1.375rem;
  color: var(--color-text);
}

.blog-post__content p {
  margin-bottom: var(--spacing-lg);
}

.blog-post__content strong {
  font-weight: 600;
  color: var(--color-text);
}

.blog-post__content a {
  color: var(--color-primary);
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.blog-post__content a:hover {
  color: var(--color-primary-dark);
}

.blog-post__content ul,
.blog-post__content ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-xl);
}

.blog-post__content li {
  margin-bottom: var(--spacing-sm);
}

/* Social Sharing */
.blog-post__share {
  margin-bottom: var(--spacing-3xl);
  padding-top: var(--spacing-2xl);
  border-top: 2px solid var(--color-border);
}

.blog-post__share h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.social-share {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.social-share__btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: all var(--transition-base);
  border: 2px solid var(--color-border);
  background-color: white;
  color: var(--color-text);
  cursor: pointer;
  min-height: 44px;
}

.social-share__btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.social-share__btn--twitter:hover {
  background-color: #1DA1F2;
  color: white;
  border-color: #1DA1F2;
}

.social-share__btn--facebook:hover {
  background-color: #4267B2;
  color: white;
  border-color: #4267B2;
}

.social-share__btn--linkedin:hover {
  background-color: #0077B5;
  color: white;
  border-color: #0077B5;
}

.social-share__btn--copy:hover {
  background-color: var(--color-secondary);
  color: white;
  border-color: var(--color-secondary);
}

/* Recommended Products Section */
.recommended-products {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-3xl) 0;
  margin-bottom: var(--spacing-3xl);
}

.recommended-products__subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1rem;
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
}

/* Related Posts Section */
.related-posts {
  margin-bottom: var(--spacing-3xl);
}

/* Newsletter CTA */
.newsletter-cta {
  background: linear-gradient(135deg, rgb(31, 38, 71) 0%, rgb(45, 55, 95) 100%);
  color: white;
  padding: var(--spacing-3xl) 0;
}

.newsletter-cta__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-2xl);
  flex-wrap: wrap;
}

.newsletter-cta__text {
  flex: 1;
  min-width: 300px;
}

.newsletter-cta__text h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: var(--spacing-sm);
  color: white;
}

.newsletter-cta__text p {
  font-size: 1rem;
  opacity: 0.95;
}

.newsletter-form--inline {
  flex: 0 1 auto;
  min-width: 300px;
}

.newsletter-form--inline .newsletter__input {
  background-color: white;
  color: var(--color-text);
  border-color: white;
}

.newsletter-form--inline .newsletter__button {
  background-color: var(--color-text);
  color: white;
}

.newsletter-form--inline .newsletter__button:hover {
  background-color: var(--color-text);
  opacity: 0.9;
}

/* ==================== HOMEPAGE ENHANCEMENTS ==================== */

/* Why Solar Section */
.why-solar {
  background-color: white;
  padding: var(--spacing-3xl) 0;
}

.why-solar__intro {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-2xl);
  color: var(--color-text-light);
  font-size: 1.0625rem;
  line-height: 1.7;
}

.why-solar__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-2xl);
}

.benefit-card {
  background-color: white;
  padding: var(--spacing-2xl);
  border-radius: var(--radius-md);
  text-align: center;
  border: 2px solid var(--color-border);
  transition: all var(--transition-base);
}

.benefit-card:hover {
  border-color: var(--color-secondary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.benefit-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  color: var(--color-primary);
}

.benefit-card__title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.benefit-card__description {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* Featured Guides Section */
.featured-guides {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-3xl) 0;
}

.featured-guides__subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1rem;
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
}

.featured-guides .blog-grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* Top Picks Section */
.top-picks {
  padding: var(--spacing-3xl) 0;
}

.top-picks__subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1rem;
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
}

/* Error Message */
.error-message {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--spacing-3xl);
  color: var(--color-text-light);
}

.error-message svg {
  margin: 0 auto var(--spacing-lg);
  opacity: 0.3;
  color: var(--color-error);
}

.error-message h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

/* ==================== RESPONSIVE - BLOG ==================== */

/* Tablet */
@media (max-width: 992px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }

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

  .newsletter-cta__content {
    flex-direction: column;
    text-align: center;
  }

  .newsletter-form--inline {
    width: 100%;
    max-width: 500px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }

  .blog-grid--related {
    grid-template-columns: 1fr;
  }

  .blog-filter__buttons {
    flex-direction: column;
  }

  .blog-filter__btn {
    width: 100%;
  }

  .blog-post__meta {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .blog-post__meta-section {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-lg);
  }

  .blog-post__share-header {
    text-align: left;
    width: 100%;
  }

  .blog-post__content {
    font-size: 1rem;
  }

  .social-share {
    flex-direction: column;
  }

  .social-share__btn {
    width: 100%;
  }

  .why-solar__grid {
    grid-template-columns: 1fr;
  }
}