body {
  font-family: sans-serif;
}

header {
  background-color: #fff;
  padding: 20px;
}

.logo {
  float: left;
}

nav {
  float: right;
}

.button {
  background-color: #000;
  color: #fff;
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

main {
  padding: 20px;
}

.hero {
  text-align: center;
}

.categories {
  margin-top: 20px;
}

.grid