body {
  font-family: Arial, sans-serif;
  background: #f3f3f3;
  margin: 0;
}
header {
  background-color: #2d4d2f;
  color: white;
  padding: 20px;
  text-align: center;
}
footer {
  background-color: #222;
  color: white;
  text-align: center;
  padding: 10px;
}
.logo {
  width: 120px;
}
.banner {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
}
main {
  padding: 20px;
}
.product-img {
  width: 300px;
  height: auto;
  display: block;
  margin: 10px auto;
}
.gallery {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}
.gallery img {
  width: 250px;
  margin: 10px;
}