body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  margin: 0;
}

header, footer {
  background: #333;
  color: white;
  text-align: center;
  padding: 1em;
}

main {
  padding: 1em;
}

.product {
  display: block;
  background: white;
  border: 1px solid #ccc;
  margin: 1em 0;
  padding: 1em;
  text-decoration: none;
  color: black;
}

.product:hover {
  border-color: blue;
}

.product img {
  width: 200px;
  display: block;
  margin-bottom: 0.5em;
}