:root {
  --bg-primary: #282c34;
  --bg-secondary: #21252b;
  --bg-darker: #1e1e24;
  --border-color: #3e4452;
  --border-glow: #61afef;
  
  --text-primary: #abb2bf;
  --text-secondary: #828997;
  --text-muted: #5c6370;
  
  --color-primary: #c678dd;       /* Keywords - Purple */
  --color-secondary: #e06c75;     /* Tags - Coral */
  --color-accent-blue: #61afef;   /* Functions - Blue */
  --color-accent-cyan: #56b6c2;   /* Operators - Cyan */
  
  --color-success: #98c379;       /* Strings - Green */
  --color-warning: #d19a66;       /* Numbers - Orange */
  --color-danger: #e06c75;        /* Red */
  
  --gradient-brand: linear-gradient(135deg, var(--color-primary), var(--color-accent-blue));
  
  --font-display: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: Consolas, "Fira Code", Monaco, Menlo, "Ubuntu Mono", "Courier New", Courier, monospace;
  
  --transition-smooth: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Theme-dependent overlay variables */
  --header-bg: #1e1e24;
  --btn-bg: #2c313c;
  --btn-bg-hover: #3e4452;
  --border-color-hover: #5c6370;
  --card-hover-bg: #282c34;
  --image-bg: #1e1e24;
  --tag-bg: #2c313c;
  --category-tab-hover-line: rgba(255, 255, 255, 0.08);
}

html[data-theme="light"] {
  --bg-primary: #fafafa;
  --bg-secondary: #f0f0f0;
  --bg-darker: #e5e5e6;
  --border-color: #d3d3d3;
  --border-glow: #4078f2;
  
  --text-primary: #383a42;
  --text-secondary: #696c77;
  --text-muted: #a0a1a7;
  
  --color-primary: #a626a4;
  --color-secondary: #e45649;
  --color-accent-blue: #4078f2;
  --color-accent-cyan: #0184bc;
  
  --color-success: #50a14f;
  --color-warning: #ca8a04;
  --color-danger: #e45649;
  
  --gradient-brand: linear-gradient(135deg, var(--color-primary), var(--color-accent-blue));
  
  --header-bg: #f0f0f0;
  --btn-bg: #e5e5e6;
  --btn-bg-hover: #d3d3d3;
  --border-color-hover: #a0a1a7;
  --card-hover-bg: #fafafa;
  --image-bg: #e5e5e6;
  --tag-bg: #e5e5e6;
  --category-tab-hover-line: rgba(0, 0, 0, 0.08);
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  opacity: 1;
  transition: opacity 0.1s ease-in-out;
}



header {
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-secondary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  user-select: none;
}

.breadcrumbs span {
  color: var(--text-secondary);
}

.breadcrumbs .breadcrumb-file {
  color: var(--color-warning);
}

.header-actions {
  display: flex;
  align-items: center;
}

nav {
  display: flex;
  align-items: center;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  margin-left: 1.5rem;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
}

nav a:hover {
  color: var(--color-accent-blue);
}

nav a:hover .category-emoji-img {
  filter: none;
}

/* Catalog Layout with Left Sidebar */
.catalog-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 4rem 1.5rem;
  width: 100%;
}

.catalog-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.catalog-header h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.5px;
}

.catalog-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Catalog Layout */
.catalog-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.category-bar {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  width: 100%;
}

.category-bar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
}

.mobile-menu-trigger {
  display: none;
}

.category-bar-list {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
  margin-bottom: -1px;
  width: 100%;
}

.category-bar-list::-webkit-scrollbar {
  display: none;
}

.category-bar-list .filter-btn {
  background: var(--bg-secondary);
  border: none;
  border-right: 1px solid var(--bg-darker);
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.55rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: var(--transition-smooth);
  width: auto;
  user-select: none;
  height: 100%;
}

.category-bar-list .filter-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--category-tab-hover-line);
}

.category-bar-list .filter-btn.active {
  color: var(--text-primary);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--color-accent-blue);
}

.category-divider {
  display: none;
}

.category-emoji-img {
  width: 14px;
  height: 14px;
  object-fit: contain;
  margin-right: 6px;
  flex-shrink: 0;
  filter: grayscale(80%) opacity(0.6);
  transition: var(--transition-smooth);
}

.filter-btn.active .category-emoji-img,
.filter-btn:hover .category-emoji-img,
.menu-link-item:hover .category-emoji-img {
  filter: none;
}

/* Catalog content / Product Grid */
.catalog-content {
  width: 100%;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 12px;
}

.product-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.product-card.clickable {
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent-blue);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  background: var(--card-hover-bg);
}

/* Product Image Styling */
.product-image-wrapper {
  height: 160px;
  background: var(--image-bg);
  border-radius: 2px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

.product-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.product-card:hover .product-image {
  transform: scale(1.03);
}

.image-placeholder {
  font-size: 2.5rem;
  color: var(--text-muted);
  background: var(--image-bg);
}

.product-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.badge-status {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0;
  letter-spacing: 0.2px;
}

.status-in-stock {
  color: var(--color-success);
}

.status-low-stock {
  color: var(--color-warning);
}

.status-out-of-stock {
  color: var(--color-danger);
}

.product-sku {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.product-name {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.product-meta {
  font-size: 0.78rem;
  color: var(--text-secondary);
  border-top: 1px dashed var(--border-color);
  padding-top: 0.65rem;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
}

.product-cat-tag {
  font-size: 0.76rem;
  background: transparent;
  padding: 0;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Syntax highlighting helpers */
.code-key {
  color: var(--color-secondary); /* coral/red attribute */
}

.code-number {
  color: var(--color-warning); /* orange/yellow number */
}

.code-comment {
  color: var(--text-muted);
}

.code-val {
  color: var(--color-warning);
}

.code-unit {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-left: 1px;
}

.product-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  gap: 8px;
}

.product-price {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-secondary);
  display: flex;
  align-items: baseline;
  gap: 0.1rem;
}

.price-not-set {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: var(--color-secondary); /* Coral color for null price */
  font-weight: 500;
}

/* Card Docs Button */
.btn-card-docs {
  background: var(--btn-bg);
  color: var(--color-accent-blue);
  border: 1px solid var(--border-color);
  padding: 0.45rem 0.9rem;
  font-size: 0.78rem;
  font-weight: 500;
  border-radius: 3px;
  text-decoration: none;
  transition: var(--transition-smooth);
  font-family: var(--font-mono);
  text-align: center;
}

.btn-card-docs:hover:not(.btn-disabled) {
  background: var(--btn-bg-hover);
  border-color: var(--color-accent-blue);
  color: var(--text-primary);
}

.btn-disabled {
  opacity: 0.25;
  cursor: not-allowed;
  border-color: var(--border-color);
  color: var(--text-muted);
}

/* Loading & Empty States */
.loading-spinner {
  text-align: center;
  padding: 3rem;
  color: var(--text-secondary);
  font-size: 1.1rem;
  grid-column: 1 / -1;
}

.error-msg {
  text-align: center;
  padding: 3rem;
  border: 1px solid var(--color-danger);
  background: rgba(239, 68, 68, 0.05);
  border-radius: 16px;
  grid-column: 1 / -1;
  color: var(--text-primary);
}

.no-products {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  grid-column: 1 / -1;
  font-size: 1.1rem;
}

/* --- Hero/About Page Styling (from previous index) --- */
.hero {
  padding: 8rem 5% 6rem;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--tag-bg);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent-blue);
  margin-bottom: 2rem;
  letter-spacing: 0.5px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 1.5rem;
}

.hero h1 span {
  background: linear-gradient(135deg, #a5b4fc, #f472b6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-secondary);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.6;
  max-width: 650px;
  margin: 0 auto 3rem;
}

.cta-group {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.9rem 2rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 12px;
  text-decoration: none;
  transition: var(--transition-smooth);
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  border: none;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
  background: var(--btn-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.preview-section {
  padding: 4rem 5%;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 3rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 1.5rem;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent-blue);
  opacity: 0;
  transition: var(--transition-smooth);
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent-blue);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.12);
}

.card:hover::before {
  opacity: 1;
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: inline-block;
}

.card h3 {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 600;
}

.card p {
  color: var(--text-secondary);
  line-height: 1.5;
  font-size: 0.9rem;
}

footer {
  margin-top: auto;
  padding: 0.35rem 1.5rem;
  background: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  z-index: 10;
}

.status-left, .status-right {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.status-item:hover {
  color: var(--text-primary);
}

.status-item svg {
  fill: currentColor;
}

.status-item a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dashed transparent;
}

.status-item a:hover {
  border-bottom-color: var(--text-primary);
}

/* Mobile only navigation bar (used in about.html) */
.mobile-only-nav {
  display: none;
}

.menu-divider {
  display: none;
  height: 1px;
  background-color: var(--border-color);
  opacity: 0.5;
  margin: 0;
  border: none;
}

.menu-link-item {
  display: none;
}

@media (max-width: 768px) {
  .header-container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    gap: 0;
  }
  
  .breadcrumbs {
    display: none;
  }
  
  .header-actions nav {
    display: none; /* Hide nav links on mobile header */
  }
  
  .theme-toggle {
    margin-left: 0;
  }
  
  /* Mobile dropdown category bar styling */
  .mobile-only-nav {
    display: block;
  }
  
  .category-bar {
    position: relative;
    z-index: 90;
  }
  
  .category-bar-container {
    flex-direction: column;
    align-items: stretch;
    margin-bottom: 0;
    padding: 0;
  }
  
  .mobile-menu-trigger {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    background: var(--bg-secondary);
    border: none;
    color: var(--text-primary);
    padding: 0.65rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    user-select: none;
    outline: none;
  }
  
  .mobile-menu-trigger .category-emoji-img {
    filter: none;
  }
  
  .trigger-content {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
    gap: 0.5rem;
  }
  
  .trigger-chevron {
    display: flex;
    align-items: center;
    color: var(--color-secondary); /* "our red" / coral color */
  }
  
  .category-bar-list {
    display: none;
    width: 100%;
  }
  
  /* Open state: display all dropdown elements */
  .category-bar-list.open {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    z-index: 100;
    max-height: 400px;
    overflow-y: auto;
  }
  
  .category-bar-list.open .filter-btn {
    display: flex;
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: 0.65rem 1.5rem;
    background: var(--bg-secondary);
  }
  
  .category-bar-list.open .filter-btn.active {
    background: var(--bg-primary);
  }
  
  .category-bar-list.open .filter-btn:last-of-type {
    border-bottom: none;
  }
  
  .category-bar-list.open .menu-divider {
    display: block;
    margin-top: 0;
    margin-bottom: 0;
  }
  
  .category-bar-list.open .menu-link-item {
    display: flex;
    align-items: center;
    padding: 0.65rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
    border-bottom: 1px solid var(--border-color);
  }
  
  .category-bar-list.open .menu-link-item:last-child {
    border-bottom: none;
  }
  
  .category-bar-list.open .menu-link-item:hover {
    color: var(--color-accent-blue);
    background: rgba(255, 255, 255, 0.02);
  }
  
  .product-grid {
    grid-template-columns: 1fr;
  }
  
  .cta-group {
    flex-direction: column;
    padding: 0 1rem;
  }
  
  footer {
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    align-items: flex-start;
  }
  
  .status-right {
    display: none;
  }
}

/* Theme Toggle Button */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.45rem;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
  margin-left: 1.5rem;
  outline: none;
}

.theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--color-accent-blue);
  transform: scale(1.02);
}

.theme-toggle svg {
  transition: transform 0.5s ease;
}

.theme-toggle:hover svg {
  transform: rotate(30deg);
}

html[data-theme="light"] .sun-icon {
  display: none;
}
html[data-theme="light"] .moon-icon {
  display: block;
}

html[data-theme="dark"] .sun-icon {
  display: block;
}
html[data-theme="dark"] .moon-icon {
  display: none;
}

.stock-label {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 0.75rem;
}

.stock-num {
  color: var(--color-warning);
  font-family: var(--font-mono);
}

.stock-unit {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 0.75rem;
}