/* Fynix LLC - Premium Shopify-Inspired E-commerce Theme */

/* ===== CSS Variables & Design Tokens ===== */
:root {
  /* Colors - Premium Light Theme */
  --color-primary: #1a1a2e;
  --color-primary-light: #2d2d44;
  --color-secondary: #c4a053;
  --color-accent: #d4af37;
  --color-success: #10b981;
  --color-danger: #ef4444;
  
  /* Neutrals */
  --color-bg: #ffffff;
  --color-bg-secondary: #f9fafb;
  --color-bg-tertiary: #f3f4f6;
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  
  /* Text Colors */
  --color-text-primary: #111827;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;
  --color-text-inverse: #ffffff;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #1a1a2e 0%, #2d2d44 100%);
  --gradient-gold: linear-gradient(135deg, #c4a053 0%, #d4af37 100%);
  --gradient-overlay: linear-gradient(180deg, rgba(26, 26, 46, 0) 0%, rgba(26, 26, 46, 0.8) 100%);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Inter', sans-serif;
  
  /* 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;
  
  /* Borders */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --container-max: 1280px;
  --header-height: 80px;
}

/* ===== Global Resets & Base Styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

/* ===== Layout Components ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  font-size: 2.5rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--gradient-gold);
  margin: var(--spacing-md) auto 0;
  border-radius: 2px;
}

/* ===== Header ===== */
.header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.02);
}

.logo-img {
  height: 45px;
  width: auto;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
  flex: 1;
  justify-content: center;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
}

.nav-link {
  font-weight: 500;
  color: var(--color-text-primary);
  position: relative;
  padding: var(--spacing-sm) 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-gold);
  transition: width var(--transition-base);
}

.nav-link:hover {
  color: var(--color-secondary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.search-bar {
  display: flex;
  align-items: center;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm) var(--spacing-md);
  transition: all var(--transition-fast);
}

.search-bar:focus-within {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(196, 160, 83, 0.1);
}

.search-input {
  border: none;
  background: transparent;
  outline: none;
  padding: 0 var(--spacing-sm);
  min-width: 200px;
  font-size: 0.95rem;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
  color: var(--color-text-primary);
}

.icon-btn:hover {
  background: var(--color-bg-secondary);
  color: var(--color-secondary);
}

.cart-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--color-danger);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--spacing-sm);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: all var(--transition-base);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--gradient-gold);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

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

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

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1.125rem;
}

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

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background: var(--gradient-primary);
  color: var(--color-text-inverse);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><defs><linearGradient id="grad" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" style="stop-color:rgba(255,255,255,0.05);stop-opacity:1" /><stop offset="100%" style="stop-color:rgba(255,255,255,0);stop-opacity:1" /></linearGradient></defs><circle cx="200" cy="150" r="300" fill="url(%23grad)"/><circle cx="900" cy="400" r="400" fill="url(%23grad)"/></svg>');
  background-size: cover;
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
  color: var(--color-text-inverse);
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-2xl);
  color: rgba(255, 255, 255, 0.9);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* ===== Product Grid ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.product-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-secondary);
}

.product-image-wrapper {
  position: relative;
  padding-top: 100%;
  background: var(--color-bg-secondary);
  overflow: hidden;
}

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

.product-card:hover .product-image {
  transform: scale(1.1);
}

.product-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--gradient-gold);
  color: var(--color-primary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.product-info {
  padding: var(--spacing-lg);
}

.product-category {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-xs);
}

.product-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.product-rating {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.stars {
  display: flex;
  gap: 2px;
  color: var(--color-accent);
}

.rating-count {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.product-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.product-price-old {
  font-size: 1rem;
  color: var(--color-text-muted);
  text-decoration: line-through;
  margin-left: var(--spacing-sm);
}

.product-colors {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.color-swatch {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.color-swatch:hover,
.color-swatch.active {
  border-color: var(--color-primary);
  transform: scale(1.15);
}

.product-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* ===== Filter Sidebar ===== */
.products-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.filters-sidebar {
  background: var(--color-bg-secondary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  height: fit-content;
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-lg));
}

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

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

.filter-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.filter-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.filter-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.filter-option input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.filter-option label {
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

/* ===== Customer Reviews ===== */
.reviews-section {
  background: var(--color-bg-secondary);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.review-card {
  background: var(--color-bg);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

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

.review-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.reviewer-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
}

.reviewer-info {
  flex: 1;
}

.reviewer-name {
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 2px;
}

.review-date {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.review-rating {
  display: flex;
  gap: 2px;
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
}

.review-text {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== Cart ===== */
.cart-container {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.cart-items {
  background: var(--color-bg);
}

.cart-item {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-fast);
}

.cart-item:hover {
  box-shadow: var(--shadow-md);
}

.cart-item-image {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.cart-item-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.cart-item-title {
  font-weight: 600;
  color: var(--color-text-primary);
}

.cart-item-meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.quantity-control {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-xs);
}

.quantity-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-weight: 700;
}

.quantity-btn:hover {
  background: var(--color-bg-secondary);
}

.quantity-input {
  width: 50px;
  text-align: center;
  border: none;
  font-weight: 600;
}

.cart-item-price {
  text-align: right;
}

.cart-item-total {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.cart-item-remove {
  color: var(--color-danger);
  font-size: 0.875rem;
  cursor: pointer;
  margin-top: var(--spacing-sm);
}

.cart-item-remove:hover {
  text-decoration: underline;
}

/* Cart Summary */
.cart-summary {
  background: var(--color-bg-secondary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  height: fit-content;
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-lg));
}

.cart-summary-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.summary-row:last-child {
  border-bottom: none;
  padding-top: var(--spacing-lg);
  font-size: 1.25rem;
  font-weight: 700;
}

/* ===== Checkout ===== */
.checkout-container {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.checkout-form {
  background: var(--color-bg);
}

.form-section {
  background: var(--color-bg);
  padding: var(--spacing-xl);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
}

.form-section-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-primary);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  transition: all var(--transition-fast);
  background: var(--color-bg);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(196, 160, 83, 0.1);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.payment-methods {
  display: grid;
  gap: var(--spacing-md);
}

.payment-method {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.payment-method:hover {
  border-color: var(--color-secondary);
  background: var(--color-bg-secondary);
}

.payment-method input[type="radio"] {
  width: 20px;
  height: 20px;
}

.payment-method.selected {
  border-color: var(--color-secondary);
  background: var(--color-bg-secondary);
}

.payment-icon {
  font-size: 1.5rem;
}

.card-details {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

/* ===== Footer ===== */
.footer {
  background: var(--gradient-primary);
  color: var(--color-text-inverse);
  padding-top: var(--spacing-3xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h3 {
  color: var(--color-text-inverse);
  margin-bottom: var(--spacing-lg);
  font-size: 1.25rem;
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
}

.footer-section a:hover {
  color: var(--color-accent);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

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

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

.newsletter-input {
  flex: 1;
  padding: var(--spacing-md);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-inverse);
}

.newsletter-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--color-accent);
  transform: translateY(-4px);
}

.footer-bottom {
  padding: var(--spacing-xl) 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
  .products-layout {
    grid-template-columns: 1fr;
  }
  
  .filters-sidebar {
    position: static;
  }
  
  .cart-container,
  .checkout-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }
  
  .nav {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background: var(--color-bg);
    flex-direction: column;
    justify-content: flex-start;
    padding: var(--spacing-xl);
    transition: left var(--transition-base);
    box-shadow: var(--shadow-xl);
  }
  
  .nav.active {
    left: 0;
  }
  
  .nav-list {
    flex-direction: column;
    width: 100%;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .search-bar {
    display: none;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
  }
  
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  
  .cart-item {
    grid-template-columns: 80px 1fr;
  }
  
  .cart-item-price {
    grid-column: 2;
    text-align: left;
    margin-top: var(--spacing-sm);
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.mt-3 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-xl); }
.hidden { display: none; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }