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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f8f9fa;
  color: #333;
  line-height: 1.6;
}

/* Navbar */
.navbar {
  background-color: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.navbar-brand {
  font-size: 1.5rem;
  font-weight: bold;
  color: #007bff;
}

.navbar-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: #333;
  transition: color 0.3s;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: #007bff;
}

.cart-count {
  display: inline-block;
  background-color: #dc3545;
  color: white;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  text-align: center;
  line-height: 20px;
  font-size: 0.75rem;
  margin-left: 0.5rem;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 2rem 0;
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  color: #007bff;
}

.hero p {
  font-size: 1.1rem;
  color: #666;
}

/* Search/Filter Section */
.filters {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.search-input {
  flex: 1;
  min-width: 250px;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

.search-input:focus {
  outline: none;
  border-color: #007bff;
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

/* Products Section */
.products-section h2 {
  margin-bottom: 2rem;
  color: #333;
}

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

/* Product Card */
.product-card {
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.product-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  background-color: #f0f0f0;
}

.product-info {
  padding: 1.5rem;
}

.product-name {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #333;
}

.product-description {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.product-price {
  font-size: 1.5rem;
  color: #007bff;
  font-weight: bold;
  margin-bottom: 1rem;
}

.product-stock {
  display: inline-block;
  padding: 0.35rem 0.6rem;
  margin-bottom: 1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}

.product-stock.in-stock {
  background: #e6f7ea;
  color: #176b35;
}

.product-stock.out-of-stock {
  background: #fde7e9;
  color: #9b1c31;
}

.product-actions button:disabled {
  background-color: #c8c8c8;
  cursor: not-allowed;
}

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

.product-qty {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

/* Buttons */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn-primary {
  background-color: #007bff;
  color: white;
}

.btn-primary:hover {
  background-color: #0056b3;
}

.btn-secondary {
  background-color: #6c757d;
  color: white;
}

.btn-secondary:hover {
  background-color: #545b62;
}

.btn-success {
  background-color: #28a745;
  color: white;
}

.btn-success:hover {
  background-color: #218838;
}

.btn-danger {
  background-color: #dc3545;
  color: white;
}

.btn-danger:hover {
  background-color: #c82333;
}

.btn-outline {
  background-color: transparent;
  color: #007bff;
  border: 1px solid #007bff;
}

.btn-outline:hover {
  background-color: #007bff;
  color: white;
}

.btn-block {
  width: 100%;
  margin-top: 0.5rem;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Loading & Empty States */
.loading {
  text-align: center;
  padding: 2rem;
  color: #666;
}

.empty-state {
  text-align: center;
  padding: 3rem;
  background: white;
  border-radius: 8px;
}

.empty-state p {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: #666;
}

/* Cart Page */
.cart-content {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2rem;
}

.cart-items {
  background: white;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.cart-table {
  width: 100%;
  border-collapse: collapse;
}

.cart-table thead {
  background-color: #f8f9fa;
  border-bottom: 2px solid #ddd;
}

.cart-table th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
}

.cart-table td {
  padding: 1rem;
  border-bottom: 1px solid #ddd;
}

.cart-table input[type="number"] {
  width: 60px;
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
}

.cart-summary {
  background: white;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  height: fit-content;
  position: sticky;
  top: 80px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid #eee;
}

.summary-row.total {
  border-bottom: none;
  border-top: 2px solid #ddd;
  margin-top: 1rem;
  padding-top: 1rem;
  font-weight: bold;
  font-size: 1.2rem;
  color: #007bff;
}

/* Footer */
.footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 2rem;
  margin-top: 4rem;
}

/* Admin Styles */
.admin-container {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 0;
  min-height: calc(100vh - 80px);
}

.admin-sidebar {
  background-color: #2c3e50;
  padding: 2rem 1rem;
  color: white;
}

.admin-menu {
  list-style: none;
}

.admin-menu li {
  margin-bottom: 1rem;
}

.admin-menu a {
  color: #ecf0f1;
  text-decoration: none;
  display: block;
  padding: 0.75rem;
  border-radius: 4px;
  transition: background-color 0.3s;
}

.admin-menu a:hover,
.admin-menu a.active {
  background-color: #007bff;
}

.admin-content {
  padding: 2rem;
  background-color: #ecf0f1;
  overflow-y: auto;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.admin-header h1 {
  color: #2c3e50;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: #333;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: #007bff;
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

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

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

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

/* Image Preview */
.image-preview {
  margin-top: 1rem;
}

.image-preview img {
  max-width: 200px;
  max-height: 200px;
  border-radius: 4px;
  border: 1px solid #ddd;
}

/* Alerts */
.alert {
  padding: 1rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.alert-success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.alert-error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.alert-info {
  background-color: #d1ecf1;
  color: #0c5460;
  border: 1px solid #bee5eb;
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.table thead {
  background-color: #2c3e50;
  color: white;
}

.table th,
.table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid #ddd;
}

.table tbody tr:hover {
  background-color: #f8f9fa;
}

.table-actions {
  display: flex;
  gap: 0.5rem;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.5);
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background-color: white;
  padding: 2rem;
  border-radius: 8px;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-header h2 {
  margin: 0;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #999;
}

.close-btn:hover {
  color: #333;
}

/* Responsive Design */
@media (max-width: 768px) {
  .navbar-links {
    gap: 1rem;
  }

  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
  }

  .cart-content {
    grid-template-columns: 1fr;
  }

  .cart-summary {
    position: static;
  }

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

  .admin-container {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    display: none;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .cart-table {
    font-size: 0.9rem;
  }

  .cart-table th,
  .cart-table td {
    padding: 0.5rem;
  }
}

@media (max-width: 480px) {
  .navbar-container {
    flex-direction: column;
    gap: 1rem;
  }

  .navbar-links {
    width: 100%;
    justify-content: space-around;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .search-input {
    min-width: 100%;
  }
}