:root {
  --screen-size-small: 30em; /* breakpoint reference only */
}
@keyframes intro {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
.muted {
  color: rgba(255, 255, 255, 0.5);
  margin-top: 5px;
}
.responsive-iframe {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  padding-top: 25px;
  height: 0;
}
.responsive-iframe iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
iframe {
  border: 0;
}
main, footer {
  animation: intro 0.3s both;
  animation-delay: 0.15s;
}
footer time[datetime$="M"]:before {
  content: "\2013\0020";
}
@media only screen
  and ( max-width: 30em ) {
  footer time[datetime$="M"] {
    display: none;
  }
}
blockquote cite {
  display: block;
}
blockquote cite::before {
   content: "\2014";
}
:target {
  color: #fff;
}
/* hack.css overrides and enhancements */
.hack li ul {
  margin: 0;
}
.main {
  padding: 20px 10px;
}
nav a.active {
  background-color: #ff2e88;
  color: #fff;
}
a[itemprop="url"] {
  color: #ff9800;
}
a[itemprop="url"]:hover {
  color: #fff;
}
a[href*="://"]::after,
a[rel*="external"] {
  content: " " url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20class='i-external'%20viewBox='0%200%2032%2032'%20width='14'%20height='14'%20fill='none'%20stroke='%23ff9800'%20stroke-linecap='round'%20stroke-linejoin='round'%20stroke-width='9.38%'%3E%3Cpath%20d='M14%209%20L3%209%203%2029%2023%2029%2023%2018%20M18%204%20L28%204%2028%2014%20M28%204%20L14%2018'/%3E%3C/svg%3E");
}
figure a[href*="://"]::after,
figure a[rel*="external"] {
  content: "";
}
html {
  font-size: 13px;
}
.hack pre {
  font-size: 17px;
}
article [itemprop="description"], article [itemprop="summary"] {
  margin-bottom: 30px;
  margin-top: 5px;
}

article [itemprop="summary"] p {
  margin: 0;
}

@media screen and (min-width: 768px) {
  html {
    font-size: 1em;
  }
  .container {
    max-width: 50rem;
  }
}