portfolio/src/App.css

.container {
  border: 2px solid red;
  max-width: 1000px;
  margin: 0 auto;
}

.nav {
  background-color: rgb(84, 84, 84);
  height: 3em;
}

.nav-items {
  display: flex;
  justify-content: space-between;
  height: 100%;
  align-items: center;
}

.menu-items {
  display: flex;
}

.menu-items div {
  margin-right: 1em;
}