@import url('https://fonts.googleapis.com/css?family=Source+Sans+Pro:400,400i,700&display=swap');

html, body {
  margin: 0;
  color: #333333;
  background: #ffffff;
  font-family: 'Source Sans Pro', sans-serif;
  background-repeat: no-repeat;
  background-position: -40px -80px;
}

nav {
  text-align: center;
}

nav img {
  display: inline;
  margin: 0;
}

a {
  color: #4ab2b1;
}

h2 {
  margin: 0 0 0.5em;
}

main, article {
  width: 90%;
  max-width: 50em;
  margin: auto;
  font-size: 16px;
  line-height: 1.6;
  padding: 72px 0;
}

article img {
  margin: 0 auto;
  width: 40%;
  max-height: none;
  display: inline-block;
}

.preview {
  margin: 0 0 0 3em;
  flex-grow: 1;
}

article {
  display: flex;
  align-items: flex-start;
  border-bottom: 1px solid #333333;
}

main {
  border-top: 1px solid #333333;
}

article:first-of-type {
  border-top: 1px solid #333333;
}

@media (max-width: 50em) {
  article {
    flex-direction: column;
  }

  .preview {
    margin: 2em 0 0;
  }

  article img {
    width: 80%;
  }
}

img {
  max-width: 100%;
  max-height: 60vh;
  margin: 2em auto;
  display: block;
}

footer {
  text-align: center;
  margin: 2em auto;
  width: 90%;
  max-width: 50em;
}

.by-line {
  font-style: italic;
}

.navigation {
  text-align: center;
  margin: 2em 0 0;
}

.social a {
  display: inline-block;
  width: 50px;
  padding: 0 10px;
  margin: 0 0 2em;
}

.social a img {
  margin: 0;
}