body {
  background: black url(images/wabe.svg) repeat;
  background-attachment: fixed;
  background-size: 40px auto;
  font-family: sans-serif;
  padding: 2em;
}
a {
  color: #204a87;
}

header, footer, section {
  min-width: 450px;
  max-width: 760px;
  margin: 0 auto 0 auto;
}

header, footer {
  border: 1px solid #000;
  color: rgba(255, 255, 255, 0.8);
  background: #000;
  background: linear-gradient(rgba(40, 40, 40, 1), rgba(0, 0, 0, 1));
}
header {
  font-size: 2em;
}
footer {
  font-size: 0.8em;
  text-align: center;
  padding: 1em 0;
}
h1 {
  margin: 0;
  padding: 0.3em;
  padding-bottom: 0.1em;
  float: left;
  font-size: 1em;
}
ul.navigation {
  margin: 0;
  padding: 0;
  float: right;
  display: table;
}
ul.navigation li {
  display: table-cell;
  list-style: none;
  list-style-position: inside;
}
ul.navigation li.work {
  background: #4e9a06;
}
ul.navigation li.projects {
  background: #3465a4;
}
ul.navigation a {
  display: inline-block;
  color: white;
  border: none;
  border-right: 1px solid black;
  text-decoration: none;
  padding: 0.7em;
  font-size: 0.6em;
  background: linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.4));
}

section {
  background: white;
  background: linear-gradient(rgba(200, 200, 200, 1) 0%, white 6em, white);
  color: dimgray;
  padding: 0 0 1em 0;
}
section p {
  margin: 1em 1em 0 1em;
}

section#profiles {
  border-top: 1px solid #202020;
  border-bottom: none;
  background: linear-gradient(rgba(0, 0, 0, 1), rgba(40, 40, 40, 1));
}
section#profiles ul {
  margin: 2.5em auto 1em auto;
  padding: 0;
  display: flex;
  text-align: center;
  gap: 1em;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  list-style: none;
}
section#profiles ul li a {
  text-decoration: none;
  color: rgba(255, 255, 255, 0.8);
  font-size: 3em;
}
section#profiles ul li a:hover,
section#profiles ul li a:focus {
  color: #53d2fc;
  text-shadow: 0 0 1px #53d2fc;
}

section h2 {
  margin: 0;
  padding: 0.3em;
  font-size: 1.6em;
  background: linear-gradient(rgba(40, 40, 40, 1), rgba(0, 0, 0, 1));
}
section h3 {
  margin: 0;
  padding: 1em 1em 0 0.8em;
}

section#work {
  border-bottom: none;
}
section#work h2 {
  color: #4e9a06;
  border-left: 4px solid #4e9a06;
}
section#work a {
  color: #4e9a06;
}
section#projects h2 {
  color: #3465a4;
  border-left: 4px solid #3465a4;
}
section#projects a {
  color: #3465a4;
}
section#error h2 {
  color: #cc0000;
  border-left: 4px solid #CC0000;
}
section#error a {
  color: #cc0000;
}
section#slides h2 {
  color: #75507b;
  border-left: 4px solid #75507b;
}

.icon-github {
  --icon-url: url("./images/icons/github.svg");
}
.icon-twitter {
  --icon-url: url("./images/icons/twitter.svg");
}
.icon-mastodon {
  --icon-url: url("./images/icons/mastodon.svg");
}
.icon-amazon {
  --icon-url: url("./images/icons/amazon.svg");
}
.icon-blogger {
  --icon-url: url("./images/icons/blog-solid.svg");
}
.icon-speakerdeck {
  --icon-url: url("./images/icons/presentation-play.svg");
}
.icon-linkedin {
  --icon-url: url("./images/icons/linkedin.svg");
}
.icon-xing {
  --icon-url: url("./images/icons/xing.svg");
}
.icon-download {
  --icon-url: url("./images/icons/cloud-download.svg");
}
.icon-box {
  --icon-url: url("./images/icons/package-down.svg");
}

[class^="icon-"]:before, [class*=" icon-"]:before {
  content: ' ';
  text-decoration: none;
  padding-right: 0.1em;
  background-color: currentColor;
  -webkit-mask-position: center;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-size: contain;
  -webkit-mask-image: var(--icon-url);
  mask-position: center;
  mask-repeat: no-repeat;
  mask-size: contain;
  mask-image: var(--icon-url);
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: middle;
}

.clearfix:before,
.clearfix:after {
  content: " "; /* 1 */
  display: table; /* 2 */
}

.clearfix:after {
  clear: both;
}