html,
button,
input,
select,
textarea,
.pure-g [class *= "pure-u"] {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #554;
}

.debug {
  border: 1px dotted red;
}

#header,
#main {
  width: 90%;
  margin: 0 auto;
  position: relative;
}

.navigation ul {
  list-style-type: none;
  padding: 0;
}

.navigation li {
  display: inline-block;
  padding-right: 1.5rem;
}

.art-title,
.art-author,
.art-posted,
.art-excerpt,
.art-body {
  margin: 1rem;
}

.art-title {
  padding: 1rem 0; 
  border-bottom: 1px dotted #887;
}

.art-excerpt {
  font-size: 1.1rem;
  font-style: italic;
}