/* ==========================================================================
   ZELMHURST E-COMMERCE DESIGN SYSTEM & CORE STYLESHEET
   Domain: https://zelmhurst.site/
   Technology Stack: HTML5, CSS3, Vanilla JavaScript
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* --- Design Tokens & CSS Variables --- */
:root {
  /* Color Palette */
  --color-midnight: #0A1128;
  --color-navy: #101E42;
  --color-charcoal-dark: #0F172A;
  --color-charcoal: #1E293B;
  --color-charcoal-light: #334155;
  --color-slate: #64748B;
  --color-slate-light: #94A3B8;
  --color-border: #E2E8F0;
  --color-border-subtle: #CBD5E1;
  --color-bg-page: #F8FAFC;
  --color-bg-surface: #FFFFFF;
  --color-bg-muted: #F1F5F9;
  
  /* Brand Accent */
  --color-accent: #2563EB;
  --color-accent-hover: #1D4ED8;
  --color-accent-light: #EFF6FF;
  --color-accent-subtle: #DBEAFE;
  
  /* Feedback */
  --color-success: #059669;
  --color-success-bg: #ECFDF5;
  --color-warning: #D97706;
  --color-warning-bg: #FFFBEB;
  --color-danger: #DC2626;
  --color-danger-bg: #FEF2F2;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

  /* Spacing Scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* Geometry */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;

  /* Elevation Shadows (Restrained) */
  --shadow-sm: 0 1px 2px 0 rgba(10, 17, 40, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(10, 17, 40, 0.07), 0 2px 4px -2px rgba(10, 17, 40, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(10, 17, 40, 0.08), 0 4px 6px -4px rgba(10, 17, 40, 0.04);
  --shadow-drawer: 0 20px 25px -5px rgba(10, 17, 40, 0.15);

  /* Container */
  --max-width: 1280px;
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-page);
  color: var(--color-charcoal);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

img, svg {
  display: block;
  max-width: 100%;
}

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

ul, ol {
  list-style: none;
}

/* --- Accessibility & Focus Styles --- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--color-midnight);
  color: #FFFFFF;
  padding: var(--space-2) var(--space-4);
  z-index: 9999;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

.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;
}

/* --- Layout Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.main-content {
  flex: 1 0 auto;
}

.section-spacing {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.section-spacing-sm {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

/* --- Typography Hierarchy --- */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-midnight);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }

p {
  color: var(--color-charcoal-light);
  line-height: 1.6;
}

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

.text-accent {
  color: var(--color-accent);
}

.text-semibold {
  font-weight: 600;
}

.text-bold {
  font-weight: 700;
}

/* --- Buttons System --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1.25;
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn-secondary {
  background-color: var(--color-midnight);
  color: #FFFFFF;
  border-color: var(--color-midnight);
}

.btn-secondary:hover {
  background-color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-charcoal);
  border-color: var(--color-border-subtle);
}

.btn-outline:hover {
  background-color: var(--color-bg-muted);
  border-color: var(--color-charcoal);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-charcoal);
}

.btn-ghost:hover {
  background-color: var(--color-bg-muted);
}

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: 0.8125rem;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1rem;
}

.btn-full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* --- Badges & Indicators --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.badge-primary {
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  border: 1px solid var(--color-accent-subtle);
}

.badge-dark {
  background-color: var(--color-midnight);
  color: #FFFFFF;
}

.badge-success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
}

.badge-neutral {
  background-color: var(--color-bg-muted);
  color: var(--color-charcoal-light);
  border: 1px solid var(--color-border);
}

/* --- Form Fields --- */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-charcoal);
  margin-bottom: var(--space-2);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: 0.9375rem;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-charcoal);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
  outline: none;
}

.form-input::placeholder, .form-textarea::placeholder {
  color: var(--color-slate-light);
}

.form-input.is-invalid, .form-select.is-invalid, .form-textarea.is-invalid {
  border-color: var(--color-danger);
}

.form-error {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-danger);
  margin-top: 4px;
}

.form-hint {
  font-size: 0.8125rem;
  color: var(--color-slate);
  margin-top: 4px;
}

/* Checkboxes & Radios */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-accent);
  cursor: pointer;
  margin-top: 2px;
}

.form-check-label {
  font-size: 0.875rem;
  color: var(--color-charcoal);
  line-height: 1.4;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  background-color: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

/* Announcement Bar */
.announcement-bar {
  background-color: var(--color-midnight);
  color: #FFFFFF;
  padding: 8px var(--space-4);
  font-size: 0.8125rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.announcement-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.announcement-text {
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.announcement-badge {
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.announcement-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: 0.75rem;
  color: var(--color-slate-light);
}

.announcement-links a:hover {
  color: #FFFFFF;
}

/* Header Main Bar */
.header-main {
  padding: var(--space-4) 0;
}

.header-main-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.site-logo {
  height: 38px;
  width: auto;
}

/* Search Container */
.header-search {
  flex: 1;
  max-width: 540px;
  position: relative;
}

.search-form {
  display: flex;
  align-items: center;
  position: relative;
  width: 100%;
}

.search-input {
  width: 100%;
  padding: 10px 44px 10px 14px;
  font-size: 0.875rem;
  background-color: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-charcoal);
  transition: all var(--transition-fast);
}

.search-input:focus {
  background-color: var(--color-bg-surface);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  outline: none;
}

.search-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-slate);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.search-btn:hover {
  color: var(--color-accent);
}

/* Search Dropdown Suggestions */
.search-results-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 380px;
  overflow-y: auto;
  z-index: 200;
  display: none;
}

.search-results-dropdown.is-active {
  display: block;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background-color: var(--color-bg-muted);
}

.search-result-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  background: var(--color-bg-muted);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.search-result-info {
  flex: 1;
}

.search-result-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-charcoal);
}

.search-result-meta {
  font-size: 0.75rem;
  color: var(--color-slate);
}

.search-result-price {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-midnight);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 12px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-charcoal);
  border-radius: var(--radius-md);
  position: relative;
  transition: all var(--transition-fast);
}

.action-btn:hover {
  background-color: var(--color-bg-muted);
  color: var(--color-accent);
}

.action-icon {
  width: 20px;
  height: 20px;
  stroke-width: 2;
}

.action-badge {
  position: absolute;
  top: 2px;
  right: 4px;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-size: 0.6875rem;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

.mobile-nav-toggle {
  display: none;
  padding: 8px;
  color: var(--color-midnight);
}

/* Header Navigation Bar */
.header-nav {
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 12px 16px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-charcoal);
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-accent);
}

.nav-link .chevron {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

/* Nav Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2) 0;
  display: none;
  z-index: 150;
}

.nav-item:hover .nav-dropdown {
  display: block;
}

.dropdown-link {
  display: block;
  padding: 8px 16px;
  font-size: 0.875rem;
  color: var(--color-charcoal-light);
  transition: all var(--transition-fast);
}

.dropdown-link:hover {
  background-color: var(--color-bg-muted);
  color: var(--color-accent);
  padding-left: 20px;
}

/* Mobile Nav Drawer */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(10, 17, 40, 0.6);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-drawer-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 85%;
  max-width: 360px;
  background-color: var(--color-bg-surface);
  z-index: 1001;
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.mobile-drawer-overlay.is-open .mobile-drawer {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.drawer-body {
  padding: var(--space-4) 0;
  flex: 1;
}

.drawer-nav-item {
  border-bottom: 1px solid var(--color-border);
}

.drawer-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  font-weight: 600;
  color: var(--color-midnight);
}

.drawer-footer {
  padding: var(--space-6);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg-muted);
}

/* ==========================================================================
   PRODUCT CARDS & PRODUCT GRIDS
   ========================================================================== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.product-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.product-card:hover {
  border-color: var(--color-border-subtle);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.product-card-media {
  position: relative;
  aspect-ratio: 4 / 3;
  background-color: #F8FAFC;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.product-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.product-card:hover .product-card-img {
  transform: scale(1.02);
}

.product-card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
}

.product-wishlist-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-slate);
  transition: all var(--transition-fast);
  z-index: 2;
}

.product-wishlist-btn:hover {
  background-color: #FFFFFF;
  color: var(--color-danger);
  border-color: var(--color-danger);
}

.product-wishlist-btn.is-active {
  color: var(--color-danger);
  fill: var(--color-danger);
  background-color: #FFFFFF;
}

.product-card-body {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-card-category {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-slate);
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.product-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-midnight);
  margin-bottom: 6px;
  line-height: 1.35;
}

.product-card-title a:hover {
  color: var(--color-accent);
}

.product-card-specs {
  font-size: 0.8125rem;
  color: var(--color-charcoal-light);
  line-height: 1.4;
  margin-bottom: var(--space-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.25rem;
}

.product-card-footer {
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.product-card-pricing {
  display: flex;
  flex-direction: column;
}

.product-card-price {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-midnight);
}

.product-card-prev-price {
  font-size: 0.8125rem;
  color: var(--color-slate);
  text-decoration: line-through;
}

.product-card-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   HOMEPAGE SECTIONS
   ========================================================================== */
/* Hero Section */
.hero-section {
  background-color: var(--color-midnight);
  color: #FFFFFF;
  padding: var(--space-16) 0;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  align-items: center;
  gap: var(--space-12);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(37, 99, 235, 0.2);
  border: 1px solid rgba(59, 130, 246, 0.4);
  color: #93C5FD;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
  letter-spacing: 0.02em;
}

.hero-title {
  color: #FFFFFF;
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-5);
}

.hero-description {
  color: #CBD5E1;
  font-size: 1.125rem;
  line-height: 1.6;
  margin-bottom: var(--space-8);
  max-width: 520px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-media {
  position: relative;
}

.hero-image {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Category Grid Tiles (Section B) */
.category-tiles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.category-tile {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.category-tile:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.category-tile-media {
  aspect-ratio: 4 / 3;
  background-color: var(--color-bg-muted);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-tile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.category-tile-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-midnight);
  margin-bottom: 4px;
}

.category-tile-count {
  font-size: 0.8125rem;
  color: var(--color-slate);
  margin-bottom: var(--space-3);
}

.category-tile-cta {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: auto;
}

/* Shop by Computing Needs (Section D) */
.needs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.needs-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast);
}

.needs-card:hover {
  border-color: var(--color-accent);
}

.needs-icon {
  width: 44px;
  height: 44px;
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.needs-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-midnight);
  margin-bottom: var(--space-2);
}

.needs-description {
  font-size: 0.875rem;
  color: var(--color-charcoal-light);
  line-height: 1.5;
  margin-bottom: var(--space-4);
  flex: 1;
}

/* Value Propositions (Section F) */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.value-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  gap: var(--space-4);
}

.value-icon-box {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background-color: var(--color-midnight);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.value-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-midnight);
  margin-bottom: 4px;
}

.value-text {
  font-size: 0.8125rem;
  color: var(--color-slate);
  line-height: 1.45;
}

/* Newsletter Section (Section G) */
.newsletter-section {
  background-color: var(--color-midnight);
  color: #FFFFFF;
  padding: var(--space-12) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.newsletter-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.newsletter-info h3 {
  color: #FFFFFF;
  font-size: 1.5rem;
  margin-bottom: var(--space-2);
}

.newsletter-info p {
  color: #94A3B8;
  font-size: 0.9375rem;
}

.newsletter-form-container {
  max-width: 480px;
  width: 100%;
}

.newsletter-form {
  display: flex;
  gap: var(--space-2);
}

.newsletter-input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.12);
}

.newsletter-disclaimer {
  font-size: 0.75rem;
  color: #64748B;
  margin-top: var(--space-2);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background-color: var(--color-midnight);
  color: #94A3B8;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
  font-size: 0.875rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-brand {
  padding-right: var(--space-6);
}

.footer-logo {
  height: 36px;
  width: auto;
  margin-bottom: var(--space-4);
}

.footer-brand p {
  color: #94A3B8;
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.footer-demo-notice {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  font-size: 0.75rem;
  color: #CBD5E1;
  line-height: 1.4;
}

.footer-col-title {
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: #94A3B8;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}

/* ==========================================================================
   PRODUCT LISTING & SHOP FACETS
   ========================================================================== */
.shop-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-8);
  align-items: start;
}

.filter-sidebar {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  position: sticky;
  top: 100px;
}

.filter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.filter-group {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.filter-group:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.filter-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-midnight);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.filter-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.shop-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-6);
}

.shop-results-count {
  font-size: 0.875rem;
  color: var(--color-slate);
  font-weight: 500;
}

.shop-sort-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.sort-select {
  padding: 6px 12px;
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-surface);
}

/* ==========================================================================
   PRODUCT DETAIL PAGE
   ========================================================================== */
.product-detail-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.pdp-gallery-main {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  aspect-ratio: 4 / 3;
  overflow: hidden;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pdp-main-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pdp-thumbnails {
  display: flex;
  gap: var(--space-3);
}

.pdp-thumb {
  width: 80px;
  height: 60px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-surface);
  cursor: pointer;
  overflow: hidden;
  padding: 2px;
}

.pdp-thumb.is-active {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.pdp-info {
  display: flex;
  flex-direction: column;
}

.pdp-meta-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.pdp-title {
  font-size: 2rem;
  margin-bottom: var(--space-3);
}

.pdp-short-desc {
  font-size: 1rem;
  color: var(--color-charcoal-light);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.pdp-pricing-box {
  background-color: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
}

.pdp-current-price {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-midnight);
}

.pdp-original-price {
  font-size: 1.125rem;
  color: var(--color-slate);
  text-decoration: line-through;
}

.pdp-stock-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-left: auto;
}

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

.pdp-config-section {
  margin-bottom: var(--space-6);
}

.config-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-midnight);
  margin-bottom: var(--space-2);
}

.config-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.config-option-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-surface);
  text-align: left;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.config-option-btn.is-selected {
  border-color: var(--color-accent);
  background-color: var(--color-accent-light);
  font-weight: 600;
}

.pdp-action-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.qty-control {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-surface);
  overflow: hidden;
}

.qty-btn {
  width: 38px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-charcoal);
  background: var(--color-bg-muted);
}

.qty-btn:hover {
  background-color: var(--color-border);
}

.qty-input {
  width: 50px;
  height: 42px;
  text-align: center;
  border: none;
  font-weight: 700;
  color: var(--color-midnight);
}

/* Specifications Table */
.specs-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.specs-table tr {
  border-bottom: 1px solid var(--color-border);
}

.specs-table tr:last-child {
  border-bottom: none;
}

.specs-table th {
  text-align: left;
  padding: var(--space-3) var(--space-5);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-slate);
  background-color: var(--color-bg-muted);
  width: 30%;
}

.specs-table td {
  padding: var(--space-3) var(--space-5);
  font-size: 0.875rem;
  color: var(--color-charcoal);
}

/* ==========================================================================
   CART & CHECKOUT
   ========================================================================== */
.cart-layout, .checkout-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--space-8);
  align-items: start;
}

.cart-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.cart-table th {
  text-align: left;
  padding: var(--space-4);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-slate);
  background-color: var(--color-bg-muted);
  border-bottom: 1px solid var(--color-border);
}

.cart-table td {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.cart-table tr:last-child td {
  border-bottom: none;
}

.cart-item-info {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.cart-item-img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  background: var(--color-bg-muted);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 4px;
}

.cart-item-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-midnight);
  margin-bottom: 2px;
}

.cart-item-config {
  font-size: 0.75rem;
  color: var(--color-slate);
}

.cart-item-remove {
  font-size: 0.8125rem;
  color: var(--color-danger);
  margin-top: 4px;
  display: inline-block;
}

.cart-summary-box {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: sticky;
  top: 100px;
}

.summary-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-midnight);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.9375rem;
  color: var(--color-charcoal-light);
  margin-bottom: var(--space-3);
}

.summary-row.total-row {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-4);
  margin-top: var(--space-4);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-midnight);
}

/* Demonstration Box Notice */
.demo-banner-box {
  background-color: var(--color-accent-light);
  border: 1px solid var(--color-accent-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  font-size: 0.8125rem;
  color: var(--color-midnight);
  line-height: 1.45;
  margin-bottom: var(--space-6);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  background-color: var(--color-midnight);
  color: #FFFFFF;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: toastIn 0.25s ease forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Breadcrumbs */
.breadcrumb-nav {
  padding: var(--space-4) 0;
  font-size: 0.8125rem;
  color: var(--color-slate);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.breadcrumb-separator {
  color: var(--color-slate-light);
}

.breadcrumb-current {
  color: var(--color-midnight);
  font-weight: 600;
}