header {
      text-align: center;
    }
    header h1 {
      margin-top: 0.5rem;
    }

    body {
      max-width: 42rem;
      margin: 4rem auto;
      padding: 0 1.25rem;
      font: 18px/1.6 system-ui, sans-serif;
    }

    .profile-picture {
      width: 10rem;
      height: 10rem;
      object-fit: cover;
      border-radius: 50%;
    }

    nav {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }