* {
  margin: 0;
  padding: 0;
}

html {
  font-family: serif;
  /* min-fs + (max-fs - min-fs) * ((viewport-width - min-vw) / (max-vw - min-vw)) */
  font-size: calc(16px + (20 - 16) * ((100vw - 320px) / (900 - 320)));
}

header {
  font-family: 'Helvetica', 'Arial', sans-serif;
}

h1 {
  font-size: 2rem;
  font-weight: normal;
}

h1,
header .tag-line {
  text-align: center;
}

main,
footer div {
  max-width: 1200px;
  margin: 0 auto;
}

.featured {
  box-sizing: content-box;
  height: 50vh;
}

.site-navigation {
  margin: 2rem 0 2rem;
}

.site-navigation ol {
  display: flex;
  justify-content: center;
}

.site-navigation li {
  list-style: none;
  padding: 0 0.25rem;
}

.site-navigation .active {
  border-bottom: solid 5px #ff9b00;
}

.site-navigation a {
  text-decoration: none;
}

.site-navigation a:hover,
.site-navigation a:visited {
  color: #333;
}

.summary {
  margin-bottom: 1.5rem;
  padding: 0.5rem 1rem 1rem;
  font-family: 'Helvetica', 'Arial', sans-serif;
}

.summary h2 {
  font-size: 1.25rem;
  font-weight: normal;
  margin-bottom: 0.4rem;
}

.summary h2::before {
  content: '◆';
  margin-right: 0.5rem;
  position: relative;
  top: -2px;
}

.summary p {
  line-height: 1.6rem;
  margin: 0;
}

.summary div {
  display: flex;
}

.summary time {
  font-size: 0.9rem;
  display: inline-block;
  text-align: right;
  padding-right: 0.25rem;
  margin-top: 0.3rem;
  margin-right: 0.5rem;
  border-right: 1px #DDD solid;
}

.summary time span {
  display: block;
  text-transform: uppercase;
}

footer {
  padding: 1.5rem;
  padding-bottom: 1rem;
  font-family: 'Helvetica', 'Arial', sans-serif;
}

footer h2 {
  font-size: 1.5rem;
  font-weight: normal;
  margin-bottom: 0.4rem;
}

footer p {
  line-height: 1.6rem;
  margin-bottom: 1rem;
}

.license {
  text-align: center;
  margin-top: 2rem;
  line-height: 1.2rem;
}