/* ============================================
   LAMP LIBRARY — Eco-Conscious Brand Identity
   "Beautiful lighting that's kind to the planet"
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #2D6A4F;       /* Forest green */
  --color-primary-dark: #1B4332;  /* Deep forest */
  --color-primary-light: #52B788; /* Fresh leaf */
  --color-secondary: #D4A373;     /* Warm wood */
  --color-accent: #E9C46A;        /* Sunlight gold */
  --color-neutral-50: #FAFAF5;    /* Off-white (paper) */
  --color-neutral-100: #F0EDE6;   /* Light sand */
  --color-neutral-200: #D9D4C7;   /* Warm gray */
  --color-neutral-300: #B8B0A0;
  --color-neutral-600: #5C5647;
  --color-neutral-800: #2C2A25;   /* Near-black */
  --color-white: #FFFFFF;
  --color-error: #C1292E;
  --color-success: #2D6A4F;

  --font-primary: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;

  --shadow-sm: 0 1px 3px rgba(44,42,37,0.08);
  --shadow-md: 0 4px 12px rgba(44,42,37,0.1);
  --shadow-lg: 0 8px 30px rgba(44,42,37,0.12);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --max-width: 1200px;
  --header-height: 72px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-primary);
  color: var(--color-neutral-800);
  background: var(--color-neutral-50);
  line-height: 1.65;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-primary-dark); }

h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-neutral-800);
}

h1 { font-size: 2.4rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.35rem; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* --- Header & Navigation --- */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-neutral-200);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.logo svg { width: 36px; height: 36px; }

.main-nav { display: flex; align-items: center; gap: 0; }
.main-nav > li { list-style: none; position: relative; }
.main-nav > li > a {
  display: block;
  padding: 24px 18px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-neutral-600);
  transition: color 0.2s;
}
.main-nav > li > a:hover,
.main-nav > li > a.active { color: var(--color-primary); }

/* Dropdown */
.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-white);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 220px;
  padding: 8px 0;
  z-index: 200;
  list-style: none;
}

.main-nav > li:hover .dropdown-menu { display: block; }

.dropdown-menu a {
  display: block;
  padding: 10px 20px;
  font-size: 0.9rem;
  color: var(--color-neutral-600);
}
.dropdown-menu a:hover {
  background: var(--color-neutral-100);
  color: var(--color-primary);
}

/* Mobile hamburger */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-neutral-800);
  margin: 5px 0;
  transition: 0.3s;
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: var(--color-white);
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  color: var(--color-white);
  font-size: 2.8rem;
  margin-bottom: 16px;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero-cta {
  display: inline-block;
  padding: 14px 36px;
  background: var(--color-accent);
  color: var(--color-neutral-800);
  font-weight: 600;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: transform 0.2s, box-shadow 0.2s;
}
.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: var(--color-neutral-800);
}

/* --- Eco Badge --- */
.eco-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(82,183,136,0.15);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

/* --- Product Grid --- */
.section { padding: 60px 0; }
.section-title {
  text-align: center;
  margin-bottom: 40px;
}
.section-title h2 { margin-bottom: 8px; }
.section-title p { color: var(--color-neutral-600); font-size: 1rem; }

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s, transform 0.3s;
}
.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.product-card-img {
  position: relative;
  padding-top: 100%;
  background: var(--color-neutral-100);
  overflow: hidden;
}
.product-card-img img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 16px;
}

.product-card-body { padding: 16px; }
.product-card-brand {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-neutral-300);
  margin-bottom: 4px;
}
.product-card-title {
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card-title a { color: var(--color-neutral-800); }
.product-card-title a:hover { color: var(--color-primary); }

.product-card-price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}
.product-card-price .sale {
  color: var(--color-error);
}
.product-card-price .original {
  text-decoration: line-through;
  color: var(--color-neutral-300);
  font-size: 0.85rem;
  font-weight: 400;
  margin-left: 8px;
}

/* --- Category Page --- */
.category-header {
  background: var(--color-neutral-100);
  padding: 40px 0;
}

.category-header h1 { margin-bottom: 8px; }
.category-text {
  color: var(--color-neutral-600);
  max-width: 700px;
  line-height: 1.7;
}

.filters-bar {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-neutral-200);
  margin-bottom: 32px;
}

.filter-group label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-neutral-600);
  display: block;
  margin-bottom: 4px;
}

.filter-group select, .filter-group input {
  padding: 8px 12px;
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-sm);
  font-family: var(--font-primary);
  font-size: 0.9rem;
  background: var(--color-white);
  color: var(--color-neutral-800);
}

/* --- Pagination --- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}
.pagination a, .pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-neutral-600);
}
.pagination a:hover { border-color: var(--color-primary); color: var(--color-primary); }
.pagination .active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* --- Product Detail Page --- */
.product-detail { padding: 48px 0; }
.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.product-gallery {
  position: relative;
}

.product-main-image {
  background: var(--color-neutral-100);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}
.product-main-image img { max-height: 450px; margin: 0 auto; object-fit: contain; }

.product-thumbnails {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}
.product-thumbnails img {
  width: 72px;
  height: 72px;
  object-fit: contain;
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-sm);
  padding: 4px;
  cursor: pointer;
  background: var(--color-white);
}
.product-thumbnails img:hover,
.product-thumbnails img.active { border-color: var(--color-primary); }

.product-info h1 { font-size: 2rem; margin-bottom: 8px; }
.product-info .product-brand {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-neutral-300);
  margin-bottom: 16px;
}

.product-price-large {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.product-availability {
  font-size: 0.85rem;
  color: var(--color-success);
  margin-bottom: 24px;
}
.product-availability.out { color: var(--color-error); }

.product-description {
  line-height: 1.75;
  color: var(--color-neutral-600);
  margin-bottom: 32px;
}

.btn-primary {
  display: inline-block;
  padding: 14px 32px;
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
}

/* Retailer / Backlink section */
.retailer-section {
  margin-top: 32px;
  padding: 20px;
  background: var(--color-neutral-100);
  border-radius: var(--radius-md);
}
.retailer-section h3 {
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-neutral-600);
}
.retailer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  font-weight: 500;
  color: var(--color-primary);
  transition: border-color 0.2s;
}
.retailer-link:hover { border-color: var(--color-primary); }

/* --- Related Products --- */
.related-products { padding: 60px 0; border-top: 1px solid var(--color-neutral-200); }

/* --- Breadcrumbs --- */
.breadcrumbs {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--color-neutral-300);
}
.breadcrumbs a { color: var(--color-neutral-600); }
.breadcrumbs a:hover { color: var(--color-primary); }
.breadcrumbs span { margin: 0 8px; }

/* --- Blog --- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 32px;
}

.blog-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s;
}
.blog-card:hover { box-shadow: var(--shadow-md); }

.blog-card-img {
  height: 200px;
  background: var(--color-neutral-200);
  overflow: hidden;
}
.blog-card-img img { width: 100%; height: 100%; object-fit: cover; }

.blog-card-body { padding: 24px; }
.blog-card-meta {
  font-size: 0.8rem;
  color: var(--color-neutral-300);
  margin-bottom: 8px;
}
.blog-card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin-bottom: 12px;
  line-height: 1.35;
}
.blog-card-excerpt {
  font-size: 0.9rem;
  color: var(--color-neutral-600);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* --- Footer --- */
.site-footer {
  background: var(--color-neutral-800);
  color: var(--color-neutral-200);
  padding: 60px 0 30px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-family: var(--font-heading);
  color: var(--color-white);
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.65;
  opacity: 0.8;
}

.footer-col h4 {
  font-family: var(--font-primary);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a {
  color: var(--color-neutral-200);
  font-size: 0.9rem;
  opacity: 0.8;
}
.footer-col a:hover { opacity: 1; color: var(--color-accent); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  opacity: 0.6;
}

/* --- Category Feature Cards --- */
.category-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
}

.category-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s, transform 0.3s;
}
.category-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.category-card-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}
.category-card h3 {
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 600;
}

/* --- Loading / States --- */
.loading {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-neutral-300);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-neutral-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

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

.empty-state {
  text-align: center;
  padding: 80px 20px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .mobile-toggle { display: block; }

  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    border-bottom: 1px solid var(--color-neutral-200);
    box-shadow: var(--shadow-lg);
  }
  .main-nav.open { display: flex; }
  .main-nav > li > a { padding: 16px 24px; }

  .dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    padding-left: 20px;
    display: none;
  }
  .main-nav > li.open .dropdown-menu { display: block; }

  .hero h1 { font-size: 2rem; }
  .hero { padding: 50px 0; }
  .product-detail-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }

  .filters-bar { flex-direction: column; align-items: stretch; }
}

@media (max-width: 480px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .footer-grid { grid-template-columns: 1fr; }
  h1 { font-size: 1.8rem; }
}