:root {
  /* Colors */
  --primary-color: #2563EB;
  --primary-hover: #1d4ed8;
  --dark-color: #0F172A;
  --accent-color: #22C55E;
  --neutral-color: #F8FAFC;
  --text-color: #0B1220;
  --text-muted: #64748B;
  --white: #FFFFFF;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  
  /* Success/Warning/Error Colors */
  --success-color: #22C55E;
  --warning-color: #F59E0B;
  --error-color: #EF4444;
  
  /* Dark Mode Colors */
  --dark-bg: #0B1220;
  --dark-surface: #1E293B;
  --dark-text: #E5E7EB;
  --dark-text-muted: #9CA3AF;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --spacing-xs: 0.25rem; /* 4px */
  --spacing-sm: 0.5rem;  /* 8px */
  --spacing-md: 1rem;    /* 16px */
  --spacing-lg: 1.5rem;  /* 24px */
  --spacing-xl: 2rem;    /* 32px */
  --spacing-2xl: 3rem;   /* 48px */
  --spacing-3xl: 4rem;   /* 64px */
  
  /* Border Radius */
  --border-radius: 0.75rem;
  --border-radius-sm: 0.375rem;
  --border-radius-lg: 1rem;
  --border-radius-full: 50%;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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);
  
  /* Transitions */
  --transition: all 0.2s ease-in-out;
  --transition-fast: all 0.15s ease-in-out;
  --transition-slow: all 0.3s ease-in-out;
  
  /* Layout */
  --navbar-height: 70px;
  --container-max-width: 1200px;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --neutral-color: var(--dark-bg);
  --text-color: var(--dark-text);
  --text-muted: var(--dark-text-muted);
  --white: var(--dark-surface);
  --gray-50: var(--dark-surface);
  --gray-100: #374151;
  --gray-200: #4B5563;
  --gray-300: #6B7280;
  --gray-800: #E5E7EB;
  --gray-900: #F9FAFB;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--neutral-color);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

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

/* Links */
a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-hover);
}

a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

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

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--border-radius-sm);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  outline: none;
}

.btn:focus {
  ring: 2px solid var(--primary-color);
  ring-offset: 2px;
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
}

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

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

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

.btn-accent:hover {
  background-color: #16a34a;
  color: var(--white);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-color);
  border: 1px solid var(--gray-300);
}

.btn-outline:hover {
  background-color: var(--gray-50);
  border-color: var(--gray-400);
  color: var(--text-color);
}

[data-theme="dark"] .btn-outline {
  color: var(--dark-text);
  border-color: var(--gray-600);
}

[data-theme="dark"] .btn-outline:hover {
  background-color: var(--gray-700);
  border-color: var(--gray-500);
}

.btn svg {
  width: 1rem;
  height: 1rem;
}

.btn-large svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* Section Styles */
section {
  padding: var(--spacing-3xl) 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  color: var(--text-color);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  background-color: rgba(248, 250, 252, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  z-index: 1000;
  transition: var(--transition);
}

[data-theme="dark"] .navbar {
  background-color: rgba(11, 18, 32, 0.95);
  border-bottom-color: rgba(71, 85, 105, 0.8);
}

.navbar.scrolled {
  height: 60px;
  background-color: var(--white);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .navbar.scrolled {
  background-color: var(--dark-surface);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-color);
}

.nav-logo-icon {
  width: 2rem;
  height: 2rem;
  color: var(--primary-color);
}

.nav-menu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 768px) {
  .nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
  }
}

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

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.wishlist-counter {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--border-radius-full);
  background-color: var(--gray-100);
  color: var(--text-color);
  cursor: pointer;
  transition: var(--transition);
}

.wishlist-counter:hover {
  background-color: var(--gray-200);
}

.wishlist-counter svg {
  width: 1.25rem;
  height: 1.25rem;
}

.counter-badge {
  position: absolute;
  top: -5px;
  right: -5px;
  background-color: var(--error-color);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  min-width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-full);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  border-radius: var(--border-radius-full);
  background-color: var(--gray-100);
  color: var(--text-color);
  cursor: pointer;
  transition: var(--transition);
}

.theme-toggle:hover {
  background-color: var(--gray-200);
}

.theme-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
}

.sun-icon {
  display: block;
}

.moon-icon {
  display: none;
}

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

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

.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 2rem;
  height: 2rem;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.hamburger span {
  width: 100%;
  height: 2px;
  background-color: var(--text-color);
  border-radius: 2px;
  transition: var(--transition);
}

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

/* Hero Section */
.hero {
  padding-top: calc(var(--navbar-height) + var(--spacing-3xl));
  padding-bottom: var(--spacing-3xl);
  background: linear-gradient(135deg, var(--neutral-color) 0%, var(--gray-50) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

[data-theme="dark"] .hero {
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-surface) 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

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

.hero-title {
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--text-color) 0%, var(--primary-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xl);
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.trust-indicators {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--text-muted);
}

.trust-item svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--accent-color);
}

.hero-image {
  position: relative;
}

.hero-image img {
  width: 100%;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-xl);
  transition: transform 0.3s ease;
}

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

/* Products Section */
.products-section {
  background-color: var(--white);
}

[data-theme="dark"] .products-section {
  background-color: var(--dark-surface);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-3xl);
}

.category-card {
  text-align: center;
  padding: var(--spacing-xl);
  background-color: var(--neutral-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.category-icon {
  width: 3rem;
  height: 3rem;
  color: var(--primary-color);
  margin: 0 auto var(--spacing-md);
}

.category-card h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-color);
}

.category-card p {
  color: var(--text-muted);
  margin: 0;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.product-card {
  background-color: var(--neutral-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.product-image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

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

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

.product-badge {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  border-radius: var(--border-radius-sm);
  color: var(--white);
}

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

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

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

.product-name {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-color);
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
}

.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.product-specs span {
  background-color: var(--gray-100);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
}

[data-theme="dark"] .product-specs span {
  background-color: var(--gray-700);
  color: var(--dark-text-muted);
}

.product-price {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

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

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

/* Services Section */
.services-section {
  background-color: var(--gray-50);
}

[data-theme="dark"] .services-section {
  background-color: var(--dark-bg);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.service-card {
  background-color: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-align: center;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.service-icon {
  width: 4rem;
  height: 4rem;
  color: var(--primary-color);
  margin: 0 auto var(--spacing-md);
}

.service-title {
  color: var(--text-color);
  margin-bottom: var(--spacing-md);
}

.service-description {
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.service-link {
  font-weight: var(--font-weight-medium);
  color: var(--primary-color);
  text-decoration: underline;
}

.service-link:hover {
  color: var(--primary-hover);
}

/* Why Section */
.why-section {
  background-color: var(--white);
}

[data-theme="dark"] .why-section {
  background-color: var(--dark-surface);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.advantage-card {
  text-align: center;
  padding: var(--spacing-xl);
}

.advantage-icon {
  width: 3.5rem;
  height: 3.5rem;
  color: var(--accent-color);
  margin: 0 auto var(--spacing-md);
}

.advantage-card h3 {
  color: var(--text-color);
  margin-bottom: var(--spacing-md);
}

.advantage-card p {
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}

/* Testimonials Section */
.testimonials-section {
  background-color: var(--gray-50);
  position: relative;
}

[data-theme="dark"] .testimonials-section {
  background-color: var(--dark-bg);
}

.testimonials-slider {
  display: flex;
  overflow: hidden;
  border-radius: var(--border-radius);
  position: relative;
}

.testimonial-card {
  min-width: 100%;
  background-color: var(--white);
  padding: var(--spacing-xl);
  text-align: center;
  transition: var(--transition-slow);
}

[data-theme="dark"] .testimonial-card {
  background-color: var(--dark-surface);
}

.testimonial-content p {
  font-size: 1.125rem;
  font-style: italic;
  color: var(--text-muted);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.testimonial-author {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.author-info h4 {
  color: var(--text-color);
  margin-bottom: var(--spacing-xs);
}

.author-info span {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.rating {
  display: flex;
  gap: var(--spacing-xs);
}

.rating svg {
  width: 1rem;
  height: 1rem;
  color: var(--warning-color);
}

.slider-controls {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.slider-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--border-radius-full);
  background-color: var(--white);
  color: var(--text-color);
  cursor: pointer;
  transition: var(--transition);
}

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

.slider-btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* FAQ Section */
.faq-section {
  background-color: var(--white);
}

[data-theme="dark"] .faq-section {
  background-color: var(--dark-surface);
}

.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--gray-200);
}

[data-theme="dark"] .faq-item {
  border-bottom-color: var(--gray-700);
}

.faq-question {
  width: 100%;
  padding: var(--spacing-lg);
  background: none;
  border: none;
  text-align: left;
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-color);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.faq-question:hover {
  background-color: var(--gray-50);
}

[data-theme="dark"] .faq-question:hover {
  background-color: var(--gray-700);
}

.faq-icon {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--primary-color);
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer p {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  color: var(--white);
  text-align: center;
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  color: var(--white);
  margin-bottom: var(--spacing-md);
}

.cta-subtitle {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
}

/* Contact Section */
.contact-section {
  background-color: var(--gray-50);
}

[data-theme="dark"] .contact-section {
  background-color: var(--dark-bg);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-3xl);
}

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

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

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

.contact-icon {
  width: 3rem;
  height: 3rem;
  color: var(--primary-color);
  flex-shrink: 0;
}

.contact-details h3 {
  color: var(--text-color);
  margin-bottom: var(--spacing-sm);
}

.contact-details p {
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}

/* Form Styles */
.contact-form {
  background-color: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .contact-form {
  background-color: var(--dark-surface);
}

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

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--gray-300);
  border-radius: var(--border-radius-sm);
  font-family: inherit;
  font-size: 1rem;
  background-color: var(--white);
  color: var(--text-color);
  transition: var(--transition);
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea {
  background-color: var(--gray-700);
  border-color: var(--gray-600);
  color: var(--dark-text);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.error-message {
  display: block;
  color: var(--error-color);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

/* Footer */
.footer {
  background-color: var(--dark-color);
  color: var(--white);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

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

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

.footer-section h3,
.footer-section h4 {
  margin-bottom: var(--spacing-md);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.footer-logo {
  width: 2rem;
  height: 2rem;
  color: var(--primary-color);
}

.footer-tagline {
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-sm);
  opacity: 0.9;
}

.footer-description {
  opacity: 0.8;
  line-height: 1.6;
}

.footer-contact p,
.footer-hours p {
  margin-bottom: var(--spacing-sm);
  opacity: 0.8;
}

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

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-full);
  color: var(--white);
  transition: var(--transition);
}

.social-links a:hover {
  background-color: var(--primary-color);
  color: var(--white);
}

.social-links svg {
  width: 1.25rem;
  height: 1.25rem;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0.8;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 3.5rem;
  height: 3.5rem;
  background-color: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
  z-index: 100;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

.back-to-top svg {
  width: 1.5rem;
  height: 1.5rem;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  padding: var(--spacing-md);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9) translateY(20px);
  transition: var(--transition);
}

[data-theme="dark"] .modal {
  background-color: var(--dark-surface);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--gray-200);
}

[data-theme="dark"] .modal-header {
  border-bottom-color: var(--gray-700);
}

.modal-header h3 {
  color: var(--text-color);
  margin: 0;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: none;
  border-radius: var(--border-radius-sm);
  background-color: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.modal-close:hover {
  background-color: var(--gray-100);
  color: var(--text-color);
}

[data-theme="dark"] .modal-close:hover {
  background-color: var(--gray-700);
}

.modal-close svg {
  width: 1.25rem;
  height: 1.25rem;
}

.modal-body {
  padding: var(--spacing-lg);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

@media (min-width: 640px) {
  .modal-body {
    grid-template-columns: 200px 1fr;
  }
}

.modal-product-image img {
  width: 100%;
  border-radius: var(--border-radius-sm);
}

.modal-product-info h4 {
  color: var(--text-color);
  margin-bottom: var(--spacing-md);
}

.modal-specs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.modal-specs span {
  background-color: var(--gray-100);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
}

[data-theme="dark"] .modal-specs span {
  background-color: var(--gray-700);
  color: var(--dark-text-muted);
}

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

.modal-description h5 {
  color: var(--text-color);
  margin-bottom: var(--spacing-sm);
}

.modal-description p {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

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

.modal-actions .btn {
  flex: 1;
  min-width: 140px;
}

/* Alert */
.alert {
  position: fixed;
  top: calc(var(--navbar-height) + var(--spacing-md));
  right: var(--spacing-md);
  max-width: 400px;
  padding: var(--spacing-md);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  z-index: 1500;
  transform: translateX(100%);
  transition: var(--transition);
}

.alert.show {
  transform: translateX(0);
}

.alert-success {
  background-color: var(--success-color);
  color: var(--white);
}

.alert svg {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

/* Responsive Design */
@media (max-width: 640px) {
  :root {
    --spacing-3xl: 2.5rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .trust-indicators {
    justify-content: center;
  }
  
  .categories-grid {
    grid-template-columns: 1fr;
  }
  
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  
  .product-actions {
    flex-direction: column;
  }
  
  .testimonial-author {
    flex-direction: column;
    text-align: center;
  }
  
  .modal-body {
    grid-template-columns: 1fr;
  }
  
  .modal-actions {
    flex-direction: column;
  }
}

@media (min-width: 641px) and (max-width: 1024px) {
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Print Styles */
@media print {
  .navbar,
  .back-to-top,
  .modal-overlay,
  .alert {
    display: none !important;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.4;
    color: #000;
  }
  
  .hero {
    padding-top: 0;
  }
  
  .btn {
    border: 1px solid #000;
    background: none;
    color: #000;
  }
}

/* Animation Classes */
.fade-in {
  animation: fadeIn 0.6s ease-out;
}

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

.slide-in-left {
  animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-in-right {
  animation: slideInRight 0.6s ease-out;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Focus and accessibility improvements */
.btn:focus-visible,
.nav-link:focus-visible,
.faq-question:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-color);
  color: var(--white);
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 1001;
}

.skip-link:focus {
  top: 6px;
}