header audio { position: fixed; top: 1em; right: 1em; width: calc(50vw - 1em); filter: invert(100%); }
header audio:focus { outline: none; }

nav a:link,
nav a:visited {
  color: inherit;
  text-decoration: none;
  box-shadow: none;
  display: inline-block;
  padding: 1ex 2ex;
  border-left: 10px solid transparent;
  transition: border-color .5s;
}
nav a:active,
nav a:hover,
nav a:active {
  outline: none;
  color: cyan;
  border-color: darkorchid;
  transition: border-color .5s;
}

main article {
  display: flex;
  flex-flow: row wrap;
  gap: 1em;
  justify-content: space-around;
  background-size: cover;
  padding: 15vh 2em;
}
main article.no_margin { margin-top: -30vh; }

main section#intro {
  margin: 0;
  padding: 0;
  text-align: center;
  width:100vw;
  max-width: 100%;
  height: 100vh;
  box-shadow: none;
  background: transparent;
}
main section#intro img { height: 66vh; margin: 10vh 0 0 0; animation: fadeIn 5s; padding: 10vh 0; }
@keyframes fadeIn { 0% { opacity: 0; height: 1px; } 50% { opacity: 0.333; } 100% { opacity: 1; height: 66vh; } }

main article section {
  width: 25%;
  min-width: 400px;
  max-width: 1200px;
  flex-grow: 1;
  margin: 0 0 6ex 0;
  padding: 1em;
  background: rgba(0,0,0,0.75);
  box-shadow: 0 0 30px black;
  border-radius: 2ex;
}

main * h2 {
  font-size: 240%;
  font-weight: 100;
  font-family: "Arcade";
  margin: 0 0 1em 0;
  color: cyan;
}
main h3 {
  font-size: 160%;
  font-weight: 200;
  margin: 1em 0;
}
main p {
  line-height: 150%;
  margin: 0;
  padding: 0 0 2ex 0;
}

footer {
  background: black;
  padding: 5em 0;
  font-size: 20px;
  line-height: 18px;
  font-weight: 100;
  position: relative;
  z-index: 3;
}
footer div {
  display: flex;
  flex-flow: row wrap;
  justify-content: center;
  min-width: 800px;
  margin: 0 auto;
  gap: 10%;
}
footer section {
  width: calc(25% - 2em);
  color: #DDD;
  text-align: center;
  border-radius: 2ex;
  padding: 0 1em 2ex 1em;
  transition: box-shadow 1s;
}
footer section { box-shadow: 0 0 2ex darkorchid; transition: box-shadow 1s; }
footer h4 {
  font-family: Arcade;
  font-weight: 100;
  font-size: 40px;
  margin: 0;
  padding: 1ex 0;
  color: darkorchid;
}

footer fieldset { border: none; margin: 0; padding: 1ex; }
footer table { width: 100%; table-layout: fixed; }
footer form [type='submit'] { color: #333; background: transparent; border: 1px solid #222; font-family: monospace; padding: 1ex; }
footer form [type='submit']:focus,
footer form [type='submit']:hover { color: cyan; border: 1px solid cyan; box-shadow: 0 0 1ex cyan; outline: none; }

footer [data-rel] a img { filter: grayscale(1); transition: filter .75s; }
footer [data-rel] a:active img,
footer [data-rel] a:hover img { filter: none; transition: filter .75s; }

footer .errors { text-align: left; font-size: 80%; color: red; }

footer a:link,
footer a:visited { color: darkorchid; font-weight: bold; }
footer a:active,
footer a:focus,
footer a:hover { color: cyan; text-decoration: none; }