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

:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --secondary: #0f172a;
  --text: #1f2937;
  --text-light: #6b7280;
  --bg: #f8fafc;
  --bg-light: #f0f9ff;
  --border: #e5e7eb;
  --success: #10b981;
  --danger: #ef4444;
}

html {
  scroll-behavior: smooth;
}

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

/* Animações */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease-out;
}

.animate-slideInLeft {
  animation: slideInLeft 0.6s ease-out;
}

.animate-slideInRight {
  animation: slideInRight 0.6s ease-out;
}

.animate-scaleIn {
  animation: scaleIn 0.6s ease-out;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

/* Container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: white;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: none;
  gap: 2rem;
}

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

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

.cart-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
}

.cart-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
}

.cart-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--danger);
  color: white;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: bold;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  padding: 4rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.1;
}

.hero-content {
  position: relative;
  z-index: 1;
  animation: fadeInUp 0.8s ease-out;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 800;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero-features {
    gap: 1rem;
  }
}

/* Main Layout */
.main-content {
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: 2rem;
  padding: 2rem 0;
}

/* Sidebar */
.sidebar {
  animation: slideInLeft 0.6s ease-out;
}

.sidebar-section {
  background: white;
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
  position: sticky;
  top: 100px;
}

.sidebar-section h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.search-input {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--border);
  border-radius: 0.5rem;
  font-size: 0.95rem;
  transition: all 0.3s;
}

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

.category-btn {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  border: 2px solid var(--border);
  background: white;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.3s;
  text-align: left;
  font-weight: 500;
}

.category-btn:hover {
  border-color: var(--primary);
  background: var(--bg-light);
}

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

/* Products Grid */
.products-section {
  animation: fadeInUp 0.6s ease-out;
}

.products-section h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
  color: var(--text);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.product-card {
  background: white;
  border-radius: 1rem;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.3s;
  animation: scaleIn 0.6s ease-out;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  border-color: var(--primary);
}

.product-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--bg-light) 0%, var(--border) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--primary);
}

.product-info {
  padding: 1.5rem;
}

.product-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.product-desc {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 1rem;
  line-height: 1.4;
}

.product-rating {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.star {
  cursor: pointer;
  font-size: 1.2rem;
  transition: all 0.2s;
}

.star:hover {
  transform: scale(1.2);
}

.star.filled {
  color: #fbbf24;
}

.star.empty {
  color: #d1d5db;
}

.product-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.product-price {
  font-size: 1.5rem;
  font-weight: bold;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.product-stock {
  font-size: 0.8rem;
  color: var(--text-light);
}

.add-to-cart-btn {
  padding: 0.75rem 1.5rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s;
}

.add-to-cart-btn:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: scale(1.05);
}

.add-to-cart-btn:disabled {
  background: var(--text-light);
  cursor: not-allowed;
}

/* Cart Sidebar */
.cart-sidebar {
  animation: slideInRight 0.6s ease-out;
}

.cart-container {
  background: white;
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
  position: sticky;
  top: 100px;
}

.cart-container h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.cart-empty {
  text-align: center;
  color: var(--text-light);
  padding: 2rem 0;
}

.cart-items {
  max-height: 400px;
  overflow-y: auto;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.cart-item {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  margin-bottom: 0.75rem;
  transition: all 0.3s;
}

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

.cart-item-name {
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
}

.cart-item-remove {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 1.2rem;
  transition: all 0.2s;
}

.cart-item-remove:hover {
  transform: scale(1.2);
}

.cart-item-price {
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

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

.qty-btn {
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  background: var(--bg-light);
  border-radius: 0.25rem;
  cursor: pointer;
  transition: all 0.2s;
}

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

.cart-summary {
  space: 1rem;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.summary-row.total {
  font-size: 1.25rem;
  font-weight: bold;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  margin-top: 0.75rem;
}

.checkout-btn {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
  margin-top: 1rem;
}

.checkout-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
}

.checkout-btn:disabled {
  background: var(--text-light);
  cursor: not-allowed;
  box-shadow: none;
}

/* Footer */
footer {
  background: var(--secondary);
  color: white;
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
}

footer p {
  margin: 0.5rem 0;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
  animation: fadeInUp 0.3s ease-out;
}

.modal-content {
  background: white;
  padding: 2rem;
  border-radius: 1rem;
  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: var(--text-light);
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--border);
  border-radius: 0.5rem;
  font-size: 0.95rem;
  font-family: inherit;
  transition: all 0.3s;
}

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

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

/* Responsive */
@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    display: none;
  }
  
  .cart-sidebar {
    display: none;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: flex;
  }
  
  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
  
  .hero h1 {
    font-size: 1.5rem;
  }
}

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

.mt-2 {
  margin-top: 0.5rem;
}

.mt-4 {
  margin-top: 1rem;
}

.hidden {
  display: none;
}


/* Image Preview */
#imagePreview[src]:not([src=""]) {
  display: block !important;
}