.air {
  margin-top: 7em; }

a.sponsors img {
  margin-top: 2em;
  margin-right: 5em;
  height: 8em; }

.sponsors img:last-child {
  display: none; }

.sponsors:hover img:first-child {
  display: none; }

.sponsors:hover img:last-child {
  display: inline-block; }

.sponsors:hover {
  -webkit-transition: 0.1s ease-out;
  -moz-transition: 0.1s ease-out;
  -ms-transition: 0.1s ease-out;
  -o-transition: 0.1s ease-out;
  transition: 0.1s ease-out; }

.entry {
  max-width: 74em; }

@media screen and (max-width: 990px) {
  .air {
    margin-top: 3em; }

  .entry {
    margin: 0 auto; }

  .airbottom {
    margin-bottom: 3em; }

  a.sponsors img {
    margin-top: 2em;
    margin-right: 3em;
    height: 7em; } }
@media screen and (max-width: 870px) {
  .entry {
    max-width: 64em; }

  h1 {
    font-size: 2.6em;
    line-height: 120%; }

  p {
    font-size: 1.9em; }

  hr {
    margin-top: 0; } }
@media screen and (max-width: 700px) {
  .entry {
    max-width: 54em; }

  h1 {
    font-size: 2.1em;
    line-height: 110%; }

  p {
    font-size: 1.8em; }

  a.sponsors img {
    margin-top: 2em;
    margin-right: 3em;
    height: 6em; } }