body {
  font-family: Arial, sans-serif;
  background: #f7f7f7;
  margin: 0;
  padding: 0;
}

.product-section {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
}

.product-section h2 {
  text-align: center;
  margin-bottom: 30px;
  font-size: 28px;
  color: #333;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.product-card {
  background: #fff;
  border: 1px solid #eee;
  border-radius: 12px;
  overflow: hidden;
  text-align: center;
  padding: 15px;
  transition: 0.3s ease;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.15);
}

.product-card img {
  max-width: 100%;
  border-radius: 8px;
  margin-bottom: 12px;
}

.product-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: #222;
}

.product-card .price {
  font-size: 16px;
  font-weight: bold;
  color: #e63946;
  margin-bottom: 12px;
}

.buy-btn {
  background: #007bff;
  color: white;
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s;
}

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

/* Các nút trong card */
.btn-group {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.buy-btn, .detail-btn {
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s;
  font-size: 14px;
}

.buy-btn {
  background: #007bff;
  color: #fff;
}
.buy-btn:hover {
  background: #0056b3;
}

.detail-btn {
  background: #6c757d;
  color: #fff;
}
.detail-btn:hover {
  background: #5a6268;
}

/* Popup Form & Popup Chi tiết */
.form-popup {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.6);
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.form-content {
  position: relative;
  background: #fff;
  padding: 20px 20px 30px;
  border-radius: 12px;
  max-width: 400px;
  width: 100%;
  box-shadow: 0 5px 20px rgba(0,0,0,0.25);
}

.detail-content {
  max-width: 600px;
  text-align: center;
}

.detail-content img {
  max-width: 100%;
  border-radius: 8px;
  margin-bottom: 15px;
}

.form-content h3 {
  margin-bottom: 15px;
  text-align: center;
}

.form-content input {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border: 1px solid #ccc;
  border-radius: 6px;
}

.form-content button {
  width: 100%;
  padding: 12px;
  background: #28a745;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
}

.form-content button:hover {
  background: #218838;
}

/* Nút X */
.close-x {
  position: absolute;
  top: 10px;
  right: 15px;
  font-size: 24px;
  font-weight: bold;
  color: #333;
  cursor: pointer;
  transition: 0.3s;
}
.close-x:hover {
  color: #dc3545;
}
/* Giá sản phẩm */
.price {
  margin: 10px 0;
}

.old-price {
  text-decoration: line-through;
  color: #888;
  font-size: 14px;

}

.new-price {
  font-size: 20px;
  font-weight: bold;
  color: #28a745; /* xanh lá */
}

/* Nút xem chi tiết */
.detail-btn {
  background: #6c757d;
  color: white;
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s;
  margin-left: 8px;
}

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