body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
}
header {
  background: #222;
  color: #fff;
  padding: 1em;
}
nav a {
  color: #fff;
  margin-right: 1em;
  text-decoration: none;
}
main {
  padding: 2em;
}
.projects {
  display: flex;
  gap: 2em;
}
.project {
  background: #fff;
  padding: 1em;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}