body {
  font-family: Arial, sans-serif;
  background-color: #ffffff;
  color: #000000;
  margin: 0;
  padding: 0;
}
header {
  background-color: #006400;
  color: #fff;
  text-align: center;
  padding: 20px;
}
.banner {
  background-color: #ffcc00;
  color: #000;
  padding: 10px;
  font-weight: bold;
}
main {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  padding: 20px;
}
.product {
  border: 2px solid #006400;
  border-radius: 10px;
  margin: 10px;
  padding: 15px;
  width: 250px;
  text-align: center;
  background-color: #f8f8f8;
}
.product img {
  max-width: 100%;
  height: auto;
}
.product h3 {
  margin: 10px 0;
}
.product a {
  display: inline-block;
  margin-top: 10px;
  padding: 10px;
  background-color: #006400;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
}
footer {
  background-color: #000;
  color: #fff;
  text-align: center;
  padding: 15px;
}