body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 20px;
  background: #f8f9fa;
}

.product-container {
  display: flex;
  gap: 40px;
  max-width: 1100px;
  margin: auto;
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.image-gallery {
  flex: 1;
  text-align: center;
}

.image-gallery img {
  width: 100%;
  max-width: 400px;
  border-radius: 10px;
}

.thumbnail-row {
  margin-top: 15px;
  display: flex;
  justify-content: center;
  gap: 10px;
}

.thumbnail-row img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border: 2px solid #ddd;
  border-radius: 8px;
  cursor: pointer;
  transition: border 0.3s;
}

.thumbnail-row img:hover {
  border-color: #28a745;
}

.product-details {
  flex: 1;
}

.product-details h1 {
  font-size: 26px;
  margin-bottom: 10px;
}

.brand {
  color: #555;
  margin-bottom: 15px;
}

.price {
  font-size: 22px;
  color: #e63946;
  margin-bottom: 20px;
}

.old-price {
  text-decoration: line-through;
  color: #777;
  font-size: 16px;
  margin-left: 10px;
}

.offer {
  color: #28a745;
  font-weight: bold;
  margin-left: 10px;
}

.highlights {
  list-style: none;
  padding: 0;
  margin-bottom: 20px;
}

.highlights li {
  margin: 8px 0;
  padding-left: 20px;
  position: relative;
}

.highlights li::before {
  content: "✔";
  color: #28a745;
  position: absolute;
  left: 0;
}

.description {
  line-height: 1.6;
  color: #333;
  margin-bottom: 25px;
}

.buy-btn {
  display: inline-block;
  padding: 14px 30px;
  background: #28a745;
  color: white;
  text-decoration: none;
  font-size: 18px;
  border-radius: 8px;
  transition: background 0.3s;
}

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