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

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

header {
  background: #333;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
}

.logo {
  font-size: 1.5rem;
}

nav ul {
  display: flex;
  gap: 15px;
  list-style: none;
}

nav ul li a {
  color: white;
  text-decoration: none;
}

.hamburger {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
}

.product-page {
  display: flex;
  padding: 20px;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}

.product-image img {
  max-width: 100%;
  height: auto;
  border: 1px solid #ddd;
}

.product-details {
  max-width: 400px;
}

#buyBtn {
  background: #7bca7f;
  color: white;
  padding: 10px 20px;
  border: none;
  margin-top: 15px;
  cursor: pointer;
}

#buyBtn:hover {
  background: #0056b3;
}

@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    display: none;
    background: #333;
    padding: 10px;
    position: absolute;
    top: 60px;
    right: 20px;
  }

  nav ul.show {
    display: flex;
  }

  .hamburger {
    display: block;
  }

  .product-page {
    flex-direction: column;
    align-items: center;
  }
}