body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
}
header, footer {
  background: #333;
  color: #fff;
  text-align: center;
  padding: 1em 0;
}
.container {
  width: 90%;
  margin: auto;
  overflow: hidden;
  padding: 20px 0;
}
.product {
  background: #fff;
  border: 1px solid #ddd;
  padding: 15px;
  margin-bottom: 20px;
  text-align: center;
}
.product img {
  max-width: 100%;
  height: auto;
}
.product h3 {
  margin: 10px 0;
}
.product p {
  color: green;
  font-size: 1.2em;
}
button {
  background: #28a745;
  color: white;
  border: none;
  padding: 10px 15px;
  cursor: pointer;
}
button:hover {
  background: #218838;
}