/* ==========================================================================
   EcomStore - Main Stylesheet
   ========================================================================== */

/* CSS Custom Properties (Design Tokens) */
:root {
  /* Colors - Light Theme */
  --color-bg: #fafafa;
  --color-bg-elevated: #ffffff;
  --color-bg-hover: #f5f5f5;
  --color-bg-active: #eeeeee;
  --color-border: #e0e0e0;
  --color-border-light: #eeeeee;
  --color-text: #1a1a2e;
  --color-text-secondary: #6b6b7b;
  --color-text-muted: #9a9aab;
  --color-primary: #1a1a2e;
  --color-primary-hover: #2d2d4a;
  --color-primary-light: #f0f0f5;
  --color-secondary: #6366f1;
  --color-secondary-hover: #4f46e5;
  --color-accent: #f59e0b;
  --color-success: #10b981;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-focus: #6366f1;
  --shadow-sm: 0 1px 2px 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);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, Consolas, monospace;
  --container-max: 1280px;
  --header-height: 72px;
  --z-dropdown: 100;
  --z-modal: 200;
  --z-toast: 300;
}

[data-theme="dark"] {
  --color-bg: #0f0f1a;
  --color-bg-elevated: #1a1a2e;
  --color-bg-hover: #24243e;
  --color-bg-active: #2d2d4a;
  --color-border: #2d2d4a;
  --color-border-light: #3d3d5a;
  --color-text: #f0f0f5;
  --color-text-secondary: #a0a0b8;
  --color-text-muted: #6b6b8a;
  --color-primary: #f0f0f5;
  --color-primary-hover: #ffffff;
  --color-primary-light: #2d2d4a;
  --color-secondary: #818cf8;
  --color-secondary-hover: #a5b4fc;
  --color-accent: #fbbf24;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */
*, *::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);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

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

ul, ol {
  list-style: none;
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.75rem 1.5rem;
  background: var(--color-primary);
  color: var(--color-bg);
  border-radius: var(--radius-md);
  z-index: var(--z-toast);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
}

/* Visually hidden */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 2rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 3rem;
  }
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text);
}

.section-title {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn-text {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-secondary);
  padding: 0.25rem 0;
}

.btn-text:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-icon {
  padding: 0.5rem;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-bg);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn-secondary {
  background: var(--color-bg-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg-hover);
  border-color: var(--color-border-light);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background: var(--color-primary-light);
}

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

.btn-ghost:hover:not(:disabled) {
  background: var(--color-bg-hover);
}

.btn-link {
  padding: 0;
  font-size: inherit;
  color: var(--color-secondary);
  font-weight: 500;
}

.btn-link:hover {
  text-decoration: underline;
}

.btn-danger {
  background: var(--color-error);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  opacity: 0.9;
}

/* ==========================================================================
   Forms
   ========================================================================== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-group input::placeholder {
  color: var(--color-text-muted);
}

.form-group input.error {
  border-color: var(--color-error);
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.form-checkbox input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.checkbox-custom {
  flex-shrink: 0;
  width: 1.125rem;
  height: 1.125rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.form-checkbox input:checked + .checkbox-custom {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.form-checkbox input:checked + .checkbox-custom::after {
  content: '';
  width: 0.375rem;
  height: 0.625rem;
  border: solid var(--color-bg);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translateY(-0.125rem);
}

.password-field {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  padding: 0.25rem;
  color: var(--color-text-muted);
}

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

.eye-closed {
  display: none;
}

.password-toggle[aria-pressed="true"] .eye-open {
  display: none;
}

.password-toggle[aria-pressed="true"] .eye-closed {
  display: block;
}

.password-strength {
  height: 4px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  margin-top: 0.5rem;
  overflow: hidden;
}

.password-strength::before {
  content: '';
  display: block;
  height: 100%;
  width: 0%;
  background: var(--color-error);
  transition: all var(--transition-base);
}

.password-strength.weak::before { width: 25%; background: var(--color-error); }
.password-strength.fair::before { width: 50%; background: var(--color-warning); }
.password-strength.good::before { width: 75%; background: var(--color-accent); }
.password-strength.strong::before { width: 100%; background: var(--color-success); }

/* ==========================================================================
   Header
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
}

.logo-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.logo-text {
  display: none;
}

@media (min-width: 640px) {
  .logo-text {
    display: block;
  }
}

/* Navigation */
.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  display: block;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.nav-desktop {
  display: none;
}

@media (min-width: 768px) {
  .nav-desktop {
    display: flex;
  }
}

.nav-mobile {
  position: fixed;
  inset: 0;
  background: var(--color-bg-elevated);
  padding: 5rem 1.5rem 2rem;
  transform: translateX(100%);
  transition: transform var(--transition-base);
  z-index: var(--z-dropdown);
  overflow-y: auto;
}

.nav-mobile.open {
  transform: translateX(0);
}

.nav-mobile .nav-list {
  flex-direction: column;
  align-items: stretch;
}

.nav-mobile .nav-link {
  padding: 1rem;
  font-size: 1.125rem;
  border-radius: var(--radius-lg);
}

.nav-divider {
  height: 1px;
  background: var(--color-border);
  margin: 1rem 0;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

/* Search */
.search-wrapper {
  position: relative;
  display: none;
}

@media (min-width: 768px) {
  .search-wrapper {
    display: block;
  }
}

.search-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.search-toggle:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.search-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 320px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.search-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.search-form {
  display: flex;
  gap: 0.5rem;
}

.search-form input {
  flex: 1;
  padding: 0.625rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.search-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  background: var(--color-primary);
  color: var(--color-bg);
  border-radius: var(--radius-md);
}

.search-suggestions {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.search-suggestions:empty {
  display: none;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.sun-icon {
  display: none;
}

[data-theme="dark"] .sun-icon {
  display: block;
}

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

/* Cart Toggle */
.cart-toggle {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.cart-toggle:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.cart-count {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 18px;
  text-align: center;
  background: var(--color-error);
  color: white;
  border-radius: var(--radius-full);
  transform: scale(0);
  transform-origin: top right;
  transition: transform var(--transition-fast);
}

.cart-count:not(:empty) {
  transform: scale(1);
}

.cart-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 360px;
  max-width: calc(100vw - 2rem);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.cart-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

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

.cart-dropdown-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.cart-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}

.cart-close:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.cart-items {
  max-height: 400px;
  overflow-y: auto;
  padding: 0.5rem;
}

.cart-item {
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

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

.cart-item-image {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: var(--color-bg);
  object-fit: cover;
  flex-shrink: 0;
}

.cart-item-details {
  flex: 1;
  min-width: 0;
}

.cart-item-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cart-item-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

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

.cart-item-quantity {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.qty-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}

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

.cart-item-remove {
  padding: 0.25rem;
  color: var(--color-text-muted);
  opacity: 0;
  transition: all var(--transition-fast);
}

.cart-item:hover .cart-item-remove {
  opacity: 1;
}

.cart-item-remove:hover {
  color: var(--color-error);
}

.cart-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--color-text-secondary);
}

.cart-empty .icon {
  margin-bottom: 1rem;
  opacity: 0.5;
}

.cart-footer {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
  border-top: 1px solid var(--color-border);
}

.cart-subtotal {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
}

.cart-subtotal-amount {
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
}

/* User Menu */
.user-menu {
  position: relative;
}

.user-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.user-toggle:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 220px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.user-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-dropdown-header {
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.user-dropdown-header .user-name {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text);
}

.user-dropdown-header .user-email {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.user-dropdown-divider {
  height: 1px;
  background: var(--color-border);
}

.user-dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--color-text);
  text-align: left;
  transition: background var(--transition-fast);
}

.user-dropdown-item:hover {
  background: var(--color-bg-hover);
}

.user-dropdown-item .icon {
  color: var(--color-text-muted);
}

.btn-logout {
  color: var(--color-error);
}

.btn-logout:hover {
  background: rgba(239, 68, 68, 0.1);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
}

.mobile-menu-toggle:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.mobile-menu-toggle .close {
  display: none;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger {
  display: none;
}

.mobile-menu-toggle[aria-expanded="true"] .close {
  display: block;
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  padding: 4rem 0;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-elevated) 100%);
}

.hero .container {
  display: grid;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr 1fr;
  }
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  max-width: 480px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-visual {
  display: none;
}

@media (min-width: 1024px) {
  .hero-visual {
    display: block;
  }
}

.hero-image-placeholder {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-bg-hover) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

.hero-image-placeholder svg {
  width: 80%;
  height: 80%;
}

/* ==========================================================================
   Features
   ========================================================================== */
.features {
  padding: 3rem 0;
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.features-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .features-list {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.5rem 1rem;
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.feature p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Products Grid
   ========================================================================== */
.featured-products,
.categories {
  padding: 4rem 0;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

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

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

.product-card-image {
  position: relative;
  aspect-ratio: 1 / 1;
  background: var(--color-bg);
  overflow: hidden;
}

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

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

.product-card-badges {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
}

.badge-sale {
  background: var(--color-error);
  color: white;
}

.badge-new {
  background: var(--color-secondary);
  color: white;
}

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

.product-card-actions {
  position: absolute;
  bottom: 0.75rem;
  left: 0.75rem;
  right: 0.75rem;
  display: flex;
  gap: 0.5rem;
  opacity: 0;
  transform: translateY(8px);
  transition: all var(--transition-base);
}

.product-card:hover .product-card-actions {
  opacity: 1;
  transform: translateY(0);
}

.product-card-actions .btn {
  flex: 1;
  background: var(--color-bg-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.product-card-actions .btn:hover {
  background: var(--color-bg);
  border-color: var(--color-primary);
}

.product-card-actions .btn-primary {
  background: var(--color-primary);
  color: var(--color-bg);
  border-color: var(--color-primary);
}

.product-card-content {
  padding: 1rem;
}

.product-card-category {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.375rem;
}

.product-card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.product-card-price {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.price-current {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
}

.price-original {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-decoration: line-through;
}

/* ==========================================================================
   Categories Grid
   ========================================================================== */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .categories-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .categories-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.category-card {
  display: block;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg);
  position: relative;
  transition: transform var(--transition-base);
}

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

.category-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.category-card-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.25rem;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
  color: white;
}

.category-card-name {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.category-card-count {
  font-size: 0.8125rem;
  opacity: 0.9;
}

/* ==========================================================================
   Newsletter
   ========================================================================== */
.newsletter {
  padding: 4rem 0;
  background: var(--color-primary);
  color: var(--color-bg);
}

.newsletter-content {
  max-width: 480px;
  text-align: center;
  margin: 0 auto;
}

.newsletter h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-bg);
}

.newsletter p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 1.5rem;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
  max-width: 400px;
  margin: 0 auto 1rem;
}

@media (max-width: 480px) {
  .newsletter-form {
    flex-direction: column;
  }
}

.newsletter-form input {
  flex: 1;
  padding: 0.875rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: white;
}

.newsletter-form input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.newsletter-form input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.3);
}

.newsletter-form .btn-primary {
  background: var(--color-accent);
  color: var(--color-bg);
  padding: 0.875rem 1.5rem;
  white-space: nowrap;
}

.newsletter-form .btn-primary:hover {
  background: #d97706;
}

.newsletter-note {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr repeat(3, 1fr);
  }
}

.footer-brand .logo {
  margin-bottom: 1rem;
}

.footer-brand p {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 280px;
  margin-bottom: 1.5rem;
}

.social-links {
  display: flex;
  gap: 0.75rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-bg);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--color-primary);
  color: var(--color-bg);
  transform: translateY(-2px);
}

.social-link svg {
  width: 20px;
  height: 20px;
}

.footer-nav-group h4 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.footer-nav-group ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-nav-group a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-nav-group a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.payment-methods {
  display: flex;
  gap: 1rem;
}

.payment-icon {
  width: 48px;
  height: 28px;
  color: var(--color-text-muted);
  opacity: 0.6;
}

/* ==========================================================================
   Modals
   ========================================================================== */
.modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal[hidden] {
  display: none;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  animation: fadeIn var(--transition-base);
}

.modal-container {
  position: relative;
  width: 100%;
  max-width: 420px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: 2rem;
  animation: slideUp var(--transition-base);
}

.modal-lg {
  max-width: 720px;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.auth-form h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
}

.auth-subtitle {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

.auth-error {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-error);
  background: rgba(239, 68, 68, 0.1);
  border-radius: var(--radius-md);
  margin-top: 1rem;
}

.auth-error:empty,
.auth-error[hidden] {
  display: none;
}

.auth-switch {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Product Modal
   ========================================================================== */
.product-modal-content {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .product-modal-content {
    grid-template-columns: 1fr 1fr;
  }
}

.product-modal-gallery {
  position: relative;
}

.product-modal-main-image {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  overflow: hidden;
}

.product-modal-main-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-modal-thumbnails {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.product-modal-thumb {
  flex-shrink: 0;
  width: 72px;
  height: 72px;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.product-modal-thumb.active,
.product-modal-thumb:hover {
  border-color: var(--color-primary);
}

.product-modal-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-modal-info {
  display: flex;
  flex-direction: column;
}

.product-modal-category {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.product-modal-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.product-modal-price {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.product-modal-description {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.product-modal-variants {
  margin-bottom: 1.5rem;
}

.product-modal-variants label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.variant-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.variant-option {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.variant-option:hover {
  border-color: var(--color-primary);
}

.variant-option.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.variant-option:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.product-modal-quantity {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.quantity-selector {
  display: flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.quantity-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-bg);
  color: var(--color-text);
}

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

.quantity-input {
  width: 60px;
  height: 44px;
  text-align: center;
  border: none;
  background: var(--color-bg-elevated);
  font-size: 1rem;
  font-weight: 500;
  -moz-appearance: textfield;
}

.quantity-input::-webkit-outer-spin-button,
.quantity-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.product-modal-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: auto;
}

.product-modal-actions .btn {
  flex: 1;
}

.product-modal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.product-modal-meta span {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: var(--z-toast);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  pointer-events: auto;
  animation: slideInRight var(--transition-base);
  min-width: 280px;
  max-width: 400px;
}

.toast.success {
  border-left: 4px solid var(--color-success);
}

.toast.error {
  border-left: 4px solid var(--color-error);
}

.toast.warning {
  border-left: 4px solid var(--color-warning);
}

.toast.info {
  border-left: 4px solid var(--color-secondary);
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(100%); }
  to { opacity: 1; transform: translateX(0); }
}

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.toast.success .toast-icon { color: var(--color-success); }
.toast.error .toast-icon { color: var(--color-error); }
.toast.warning .toast-icon { color: var(--color-warning); }
.toast.info .toast-icon { color: var(--color-secondary); }

.toast-message {
  flex: 1;
  font-size: 0.875rem;
  color: var(--color-text);
}

.toast-close {
  flex-shrink: 0;
  padding: 0.25rem;
  color: var(--color-text-muted);
}

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

/* ==========================================================================
   Skeleton Loaders
   ========================================================================== */
.loading-placeholder {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .loading-placeholder {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .loading-placeholder {
    grid-template-columns: repeat(4, 1fr);
  }
}

.skeleton {
  background: linear-gradient(90deg, var(--color-bg-hover) 25%, var(--color-bg-active) 50%, var(--color-bg-hover) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-card {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.skeleton-card::before {
  content: '';
  display: block;
  aspect-ratio: 1 / 1;
  background: inherit;
}

.skeleton-card::after {
  content: '';
  display: block;
  padding: 1rem;
  background: inherit;
}

.skeleton-category {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
}

/* ==========================================================================
   Responsive Utilities
   ========================================================================== */
@media (max-width: 639px) {
  .hide-mobile {
    display: none !important;
  }
}

@media (min-width: 640px) and (max-width: 1023px) {
  .hide-tablet {
    display: none !important;
  }
}

@media (min-width: 1024px) {
  .hide-desktop {
    display: none !important;
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
  .header, .footer, .modal, .toast-container, .btn, .cart-dropdown, .user-dropdown {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .container {
    max-width: none;
    padding: 0;
  }
}