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

:root {
  --primary-color: #2196f3;
  --primary-dark: #1976d2;
  --primary-light: #90caf9;
  --secondary-color: #0d47a1;
  --accent-color: #42a5f5;
  --background-color: #fafafa;
  --text-color: #333;
  --light-text: #666;
  --white: #ffffff;
  --gray: #e0e0e0;
  --success-color: #4caf50;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
}

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Navigation */
.navbar {
  background: var(--white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  cursor: pointer;
  font-weight: 500;
  transition: color 0.3s;
}

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

.nav-actions {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.cart-btn {
  background: var(--primary-color);
  color: var(--white);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  cursor: pointer;
  font-size: 1.2rem;
  position: relative;
  transition: background 0.3s;
}

.cart-btn:hover {
  background: var(--primary-dark);
}

.cart-count {
  background: var(--white);
  color: var(--primary-color);
  border-radius: 50%;
  padding: 0.2rem 0.5rem;
  font-size: 0.8rem;
  font-weight: bold;
  margin-left: 0.3rem;
}

/* Pages */
.page {
  display: none;
  flex: 1;
}

.page.active {
  display: block;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: var(--white);
  padding: 5rem 2rem;
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3rem;
  font-weight: bold;
  margin-bottom: 1rem;
  animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-cta {
  background: var(--white);
  color: var(--primary-color);
  border: none;
  padding: 1rem 2rem;
  font-size: 1.1rem;
  font-weight: bold;
  border-radius: 30px;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
  animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.hero-decoration {
  position: absolute;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  top: -100px;
  right: -100px;
}

/* Featured Section */
.featured-section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.carousel-container {
  position: relative;
  overflow: hidden;
}

.carousel-track {
  overflow-x: auto;
  scroll-behavior: smooth;
  scrollbar-width: none;
}

.carousel-track::-webkit-scrollbar {
  display: none;
}

.carousel-content {
  display: flex;
  gap: 2rem;
  padding: 1rem;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--white);
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  z-index: 10;
  transition: all 0.3s;
}

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

.carousel-btn-prev {
  left: 0;
}

.carousel-btn-next {
  right: 0;
}

.carousel-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  min-width: 300px;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.carousel-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

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

.carousel-card-title {
  font-size: 1rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.carousel-card-price {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--primary-color);
}

.carousel-card-original-price {
  text-decoration: line-through;
  color: var(--light-text);
  margin-left: 0.5rem;
  font-size: 0.9rem;
}

.carousel-badge {
  background: var(--primary-color);
  color: var(--white);
  padding: 0.2rem 0.5rem;
  border-radius: 10px;
  font-size: 0.8rem;
  position: absolute;
  top: 10px;
  right: 10px;
}

/* Categories Section */
.categories-section {
  padding: 4rem 2rem;
  background: var(--white);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.category-card {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--white) 100%);
  border: 2px solid var(--primary-color);
  border-radius: 12px;
  padding: 2rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.category-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.category-name {
  font-weight: bold;
  color: var(--primary-color);
  font-size: 1rem;
}

/* Products Section */
.products-section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.filter-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.filter-btn {
  background: var(--white);
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  padding: 0.5rem 1.5rem;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s;
}

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

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.product-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.product-image {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.product-info {
  padding: 1rem;
}

.product-brand {
  font-size: 0.85rem;
  color: var(--light-text);
  margin-bottom: 0.3rem;
}

.product-name {
  font-size: 1rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: var(--text-color);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.product-price-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.product-price {
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--primary-color);
}

.product-original-price {
  text-decoration: line-through;
  color: var(--light-text);
  font-size: 0.9rem;
}

.product-rating {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.9rem;
  color: #ffc107;
}

.product-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.btn-add-cart {
  flex: 1;
  background: var(--primary-color);
  color: var(--white);
  border: none;
  padding: 0.7rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.3s;
}

.btn-add-cart:hover {
  background: var(--primary-dark);
}

.btn-view {
  background: var(--white);
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  padding: 0.7rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s;
}

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

/* Trust Section */
.trust-section {
  padding: 4rem 2rem;
  background: var(--white);
  margin-top: 4rem;
}

.trust-badges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.trust-badge {
  text-align: center;
  padding: 2rem;
}

.trust-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.trust-text {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 0.3rem;
}

.trust-desc {
  font-size: 0.9rem;
  color: var(--light-text);
}

/* Product Detail Page */
.product-detail-container {
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2rem;
}

.product-detail-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.product-detail-info {
  padding: 1rem;
}

.product-detail-brand {
  font-size: 1.1rem;
  color: var(--light-text);
  margin-bottom: 0.5rem;
}

.product-detail-name {
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.product-detail-description {
  color: var(--light-text);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.product-detail-price {
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.product-detail-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.btn-primary {
  background: var(--primary-color);
  color: var(--white);
  border: none;
  padding: 1rem 2rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  font-size: 1rem;
  transition: background 0.3s;
}

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

.btn-secondary {
  background: var(--white);
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  padding: 1rem 2rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  font-size: 1rem;
  transition: all 0.3s;
}

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

.btn-large {
  padding: 1.2rem 3rem;
  font-size: 1.1rem;
}

/* Cart Page */
.cart-container {
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.page-title {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 2rem;
  text-align: center;
}

.cart-items {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.cart-item {
  background: var(--white);
  padding: 1.5rem;
  border-radius: 12px;
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: 1.5rem;
  box-shadow: var(--shadow);
}

.cart-item-image {
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: 8px;
}

.cart-item-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.cart-item-name {
  font-weight: bold;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.cart-item-price {
  color: var(--primary-color);
  font-weight: bold;
  font-size: 1.2rem;
}

.cart-item-quantity {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.5rem;
}

.quantity-btn {
  background: var(--primary-color);
  color: var(--white);
  border: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  font-weight: bold;
}

.cart-item-actions {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.remove-btn {
  background: #f44336;
  color: var(--white);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
}

.cart-empty {
  text-align: center;
  padding: 3rem;
}

.cart-empty p {
  font-size: 1.5rem;
  color: var(--light-text);
  margin-bottom: 2rem;
}

.cart-summary {
  background: var(--white);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  max-width: 500px;
  margin: 0 auto;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.summary-row.total {
  border-top: 2px solid var(--gray);
  padding-top: 1rem;
  font-weight: bold;
  font-size: 1.3rem;
  color: var(--primary-color);
}

/* Checkout Page */
.checkout-container {
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.checkout-form {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 2rem;
  margin-top: 2rem;
}

.form-section {
  background: var(--white);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.form-section h3 {
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.form-group {
  margin-bottom: 1rem;
}

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

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--gray);
  border-radius: 6px;
  font-size: 1rem;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
}

.checkout-order-summary {
  background: var(--white);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  height: fit-content;
}

.checkout-order-summary h3 {
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.checkout-item {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--gray);
}

/* Payment Page */
.payment-container {
  padding: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.payment-methods {
  background: var(--white);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

.payment-method-label {
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}

.payment-option {
  display: flex;
  align-items: center;
  padding: 1rem;
  border: 2px solid var(--gray);
  border-radius: 12px;
  margin-bottom: 1rem;
  cursor: pointer;
  transition: all 0.3s;
}

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

.payment-option input[type="radio"] {
  margin-right: 1rem;
  width: 20px;
  height: 20px;
  cursor: pointer;
}

.payment-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
}

.payment-icon {
  font-size: 2rem;
}

.payment-details h3 {
  color: var(--primary-color);
  margin-bottom: 0.3rem;
}

.payment-details p {
  color: var(--light-text);
  font-size: 0.9rem;
}

.payment-summary {
  background: var(--white);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  text-align: center;
}

/* Success Page */
.success-container {
  padding: 4rem 2rem;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.success-icon {
  font-size: 5rem;
  margin-bottom: 2rem;
}

.success-title {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.success-message {
  font-size: 1.2rem;
  color: var(--light-text);
  margin-bottom: 2rem;
}

.order-info {
  background: var(--white);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
  text-align: left;
}

.order-info p {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

/* Legal Pages */
.legal-container {
  padding: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.legal-container p,
.legal-container li {
  margin-bottom: 1rem;
  line-height: 1.8;
}

.legal-container h3 {
  color: var(--primary-color);
  margin: 2rem 0 1rem;
}

/* Footer */
.footer {
  background: var(--text-color);
  color: var(--white);
  padding: 3rem 2rem 1.5rem;
  margin-top: auto;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  color: var(--primary-light);
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.footer-section a {
  display: block;
  color: var(--white);
  text-decoration: none;
  margin-bottom: 0.5rem;
  cursor: pointer;
  transition: color 0.3s;
}

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

.footer-section p {
  margin-bottom: 0.5rem;
  color: #bbb;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid #555;
}

.payment-methods-footer {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 1rem 0;
}

.payment-method-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.price-disclaimer {
  color: #999;
  font-size: 0.9rem;
  margin-top: 1rem;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-links {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .product-detail {
    grid-template-columns: 1fr;
  }

  .checkout-form {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .cart-item {
    grid-template-columns: 80px 1fr;
  }

  .cart-item-actions {
    grid-column: 1 / -1;
  }
}