* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  margin-top: 3em;
}

header,
main,
footer {
  margin: 0 auto;
  max-width: 800px;
}

header {
  padding: 2em 0;
}

header img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 42%;
}

nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;

  display: flex;
  flex-flow: row;
  justify-content: space-around;
  align-items: stretch;
}

nav a {
  padding: 0.5em 4em;
}

section {
  margin: 1em 0;

  padding-top: 1.5em;
  min-height: 20em;
}

section > p {
  margin: 1em 0;
}

section ul {
  padding-left: 2em;
}

#projects {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto;
  grid-column-gap: 2em;
}

#projects article {
  padding: 1em;
}

footer {
  margin-top: 2em;
  margin-bottom: 1em;
  padding: 1em 0;
  text-align: center;
}