/* E-commerce Site - Minimalist Mobile-First Design */
/* Bangladesh-focused with BDT (৳) currency */

:root {
  --primary-color: #007bff;
  --primary-dark: #0056b3;
  --secondary-color: #6c757d;
  --success-color: #28a745;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  --light-color: #f8f9fa;
  --dark-color: #343a40;
  --border-color: #dee2e6;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --radius: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: var(--dark-color);
  background-color: var(--light-color);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

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

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--dark-color);
  font-weight: 500;
  transition: color 0.3s;
}

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

.cart-icon {
  position: relative;
  cursor: pointer;
  font-size: 1.5rem;
}

.cart-count {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--danger-color);
  color: white;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: bold;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 60px 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.9;
}

/* Products Grid */
.products-section {
  padding: 40px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 30px;
  font-size: 2rem;
  color: var(--dark-color);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 25px;
}

.product-card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  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: 200px;
  object-fit: cover;
  background: var(--light-color);
}

.product-info {
  padding: 20px;
}

.product-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--dark-color);
}

.product-description {
  font-size: 0.9rem;
  color: var(--secondary-color);
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-price {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: all 0.3s;
}

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

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

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

.btn-secondary:hover {
  background: #5a6268;
}

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

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

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

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

.btn-block {
  display: block;
  width: 100%;
}

/* Cart Sidebar */
.cart-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 200;
  display: none;
}

.cart-overlay.active {
  display: block;
}

.cart-sidebar {
  position: fixed;
  top: 0;
  right: -400px;
  width: 100%;
  max-width: 400px;
  height: 100vh;
  background: white;
  box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
  z-index: 201;
  transition: right 0.3s;
  display: flex;
  flex-direction: column;
}

.cart-sidebar.active {
  right: 0;
}

.cart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.cart-header h2 {
  font-size: 1.5rem;
}

.close-cart {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--secondary-color);
}

.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.cart-item {
  display: flex;
  gap: 15px;
  padding: 15px 0;
  border-bottom: 1px solid var(--border-color);
}

.cart-item-image {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius);
}

.cart-item-info {
  flex: 1;
}

.cart-item-name {
  font-weight: 600;
  margin-bottom: 5px;
}

.cart-item-price {
  color: var(--primary-color);
  font-weight: 500;
}

.cart-item-quantity {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.quantity-btn {
  width: 30px;
  height: 30px;
  border: 1px solid var(--border-color);
  background: white;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem;
}

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

.remove-item {
  color: var(--danger-color);
  cursor: pointer;
  font-size: 0.9rem;
  margin-top: 5px;
}

.cart-footer {
  padding: 20px;
  border-top: 1px solid var(--border-color);
}

.cart-total {
  display: flex;
  justify-content: space-between;
  font-size: 1.25rem;
  font-weight: bold;
  margin-bottom: 15px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: white;
  border-radius: var(--radius);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 1.5rem;
}

.close-modal {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--secondary-color);
}

.modal-body {
  padding: 20px;
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--dark-color);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  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);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* Tracking Page */
.tracking-section {
  padding: 40px 0;
}

.tracking-form {
  max-width: 500px;
  margin: 0 auto 40px;
  background: white;
  padding: 30px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.order-status {
  max-width: 600px;
  margin: 0 auto;
  background: white;
  padding: 30px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.status-badge {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
}

.status-processing {
  background: var(--warning-color);
  color: #000;
}

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

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

.order-details {
  margin-top: 20px;
}

.order-details h3 {
  margin-bottom: 15px;
  color: var(--dark-color);
}

.order-info-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.order-items {
  margin-top: 20px;
}

.order-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

/* Admin Panel */
.admin-container {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 250px;
  background: var(--dark-color);
  color: white;
  padding: 20px 0;
}

.admin-sidebar h2 {
  padding: 0 20px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.admin-nav {
  list-style: none;
  margin-top: 20px;
}

.admin-nav li {
  padding: 15px 20px;
  cursor: pointer;
  transition: background 0.3s;
}

.admin-nav li:hover,
.admin-nav li.active {
  background: rgba(255, 255, 255, 0.1);
}

.admin-nav li.active {
  border-left: 3px solid var(--primary-color);
}

.admin-main {
  flex: 1;
  padding: 30px;
  background: var(--light-color);
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.admin-header h1 {
  font-size: 2rem;
}

/* Dashboard Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: white;
  padding: 25px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.stat-card h3 {
  font-size: 0.9rem;
  color: var(--secondary-color);
  margin-bottom: 10px;
}

.stat-card .value {
  font-size: 2rem;
  font-weight: bold;
  color: var(--primary-color);
}

/* Admin Tables */
.admin-table {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

.admin-table th,
.admin-table td {
  padding: 15px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.admin-table th {
  background: var(--light-color);
  font-weight: 600;
  color: var(--dark-color);
}

.admin-table tr:hover {
  background: var(--light-color);
}

.admin-table .actions {
  display: flex;
  gap: 10px;
}

.admin-table .actions button {
  padding: 5px 10px;
  font-size: 0.85rem;
}

/* Admin Forms */
.admin-form {
  background: white;
  padding: 30px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 600px;
}

.admin-form h2 {
  margin-bottom: 20px;
}

/* Image Upload */
.image-upload {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.3s;
}

.image-upload:hover {
  border-color: var(--primary-color);
}

.image-upload input {
  display: none;
}

.image-preview {
  max-width: 200px;
  max-height: 200px;
  margin-top: 15px;
  border-radius: var(--radius);
}

/* Transaction Page */
.transaction-page {
  padding: 40px 0;
  text-align: center;
}

.transaction-success {
  background: white;
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 500px;
  margin: 0 auto;
}

.success-icon {
  font-size: 4rem;
  color: var(--success-color);
  margin-bottom: 20px;
}

.transaction-timer {
  font-size: 1.5rem;
  color: var(--danger-color);
  margin: 20px 0;
}

/* Alerts */
.alert {
  padding: 15px 20px;
  border-radius: var(--radius);
  margin-bottom: 20px;
}

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

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

.alert-warning {
  background: #fff3cd;
  color: #856404;
  border: 1px solid #ffeeba;
}

/* Loading */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--secondary-color);
}

.empty-state h3 {
  margin-bottom: 10px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    flex-wrap: wrap;
    gap: 15px;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }

  .cart-sidebar {
    max-width: 100%;
  }

  .admin-container {
    flex-direction: column;
  }

  .admin-sidebar {
    width: 100%;
  }

  .admin-nav {
    display: flex;
    overflow-x: auto;
  }

  .admin-nav li {
    white-space: nowrap;
  }

  .admin-main {
    padding: 20px;
  }

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

  .admin-table {
    overflow-x: auto;
  }

  .admin-table table {
    min-width: 600px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 10px;
  }

  .hero {
    padding: 40px 0;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

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

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

  .modal {
    margin: 10px;
  }

  .tracking-form,
  .order-status {
    padding: 20px;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.mt-20 {
  margin-top: 20px;
}

.mb-20 {
  margin-bottom: 20px;
}

.hidden {
  display: none !important;
}

/* Footer */
footer {
  background: var(--dark-color);
  color: white;
  padding: 30px 0;
  text-align: center;
  margin-top: 40px;
}

footer p {
  opacity: 0.8;
}