#select{
  position: sticky;
  top: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-evenly;
  background-color: blue;
  padding: 4px;
  a{
    color: white;
    padding: 16px;
  }
}

main{ line-height: 1.6em; }

#container p{ line-height: 1.6em; }

#introduction{
  display: flex;
  flex-wrap: wrap;
  width: 100%;
  padding: 6vh
}

h1 {
  box-sizing: border-box;
  font-size: 3.6em;
  line-height: 1em;
  padding-right: 1vw 
}

#introduction p {
  font-size: 1.1em; 
}

#content {
  width:100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 6vh; 
}

figure {
  display: flex;
  flex-direction: column;
  padding-bottom: 8vh;
  img { max-width:100%; };
  figcaption *{ padding-top: 12px }; 
}

main nav {
  width: 100%;
  padding-bottom: 4em;
  ul{
    display: flex;
    justify-content: space-evenly;
  }
}

@media (min-width: 60em){
  main { font-size: 12px; }
  figure{ width: 50% }
  #introduction {
    .summary{ width: 75% }
    h1{ width: 25% }
  }
}