/* Existing styles */
:root {
  --primary: #2c3e50;
  --secondary: #34495e;
  --accent: #e74c3c;
  --text: #333;
  --bg: #fff;
  --border: #e0e0e0;
  --shadow: rgba(0,0,0,0.1);
}

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

body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

header, footer {
  background: var(--primary);
  color: #fff;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
}

.nav-controls {
  display: flex;
  gap: 1rem;
}

.nav-controls select,
.nav-controls input[type="text"] {
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}

main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.product-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg);
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px var(--shadow);
}

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

.card-content {
  padding: 0.75rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0.5rem 0 0.25rem;
}

.card-price {
  color: var(--accent);
  font-weight: 600;
  margin: 0;
}

.card-category {
  font-size: 0.875rem;
  color: #777;
  margin: 0.25rem 0;
}

footer {
  text-align: center;
  padding: 1rem 0;
  background: var(--secondary);
  color: #fff;
  font-size: 0.875rem;
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-controls {
    width: 100%;
    justify-content: space-between;
  }
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Product detail styles */
.product-detail-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  background: var(--bg);
  max-width: 800px;
  margin: 0 auto;
}

.product-detail-image {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.product-detail-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.product-detail-price {
  color: var(--accent);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.product-detail-category {
  font-size: 1rem;
  color: #777;
  margin-bottom: 0.5rem;
}

.product-detail-description {
  margin-bottom: 0.5rem;
}

.product-detail-specs {
  font-size: 0.9rem;
  color: #555;
  margin-bottom: 1rem;
}

.product-detail-status {
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 1rem;
}

.product-detail-button {
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: not-allowed;
}

/* Responsive navigation toggle */
#nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  #nav-toggle {
    display: block;
  }
  .nav-controls {
    display: none;
    flex-direction: column;
    width: 100%;
  }
  .nav-controls.show {
    display: flex;
  }
}