*, *::before, *::after {
  margin: 0;
  padding: 0;
  border: none;
  box-sizing: border-box;
}

.ar43 {
  aspect-ratio: 4/3;
}

.ar34 {
  aspect-ratio: 3/4;
}

.ar169 {
  aspect-ratio: 16/9;
}

.ar916 {
  aspect-ratio: 9/16;
}

html, body {
  width: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: "Open Sans", Tahoma, Verdana, sans-serif;
  background-size: cover;
  background-image: url(../webp/kiel.webp);
  background-repeat: no-repeat;
  background-attachment: fixed;
  line-height: 1.6;
}

p {
  margin-bottom: 1em;
}

a {
  color: blue;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a.anchor {
  height: 0;
  position: relative;
  top: -4em;
  visibility: hidden;
}

h1 {
  font-size: 125%;
}

h3 {
  margin-bottom: 1em;
}

video {
  background-color: black;
}

table {
  width: 100%;
  border-collapse: collapse;
}

table td, table th {
  padding: 0.6em 1em;
}

table th {
  text-align: left;
  border: 1px solid lightgray;
  cursor: default;
}

table tbody.closed tr:first-child th::before {
  display: inline-block;
  content: "";
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0.35em 0 0.35em 0.7em;
  border-color: transparent transparent transparent black;
  vertical-align: baseline;
  margin-right: 0.5em;
}

table tbody.closed tr:not(:first-child) {
  display: none;
}

header {
  max-width: 70em;
  margin: 0 auto;
  min-height: 18em;
  padding: 3em 5em;
}

header img {
  width: 12em;
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 4em;
}

header h1 {
  display: inline;
}

nav {
  max-width: 70em;
  background-color: lightgray;
  position: sticky;
  top: 0;
  margin: 0 auto;
  text-align: right;
  cursor: default;
  padding-right: 5em;
  z-index: 10;
}

nav a {
  cursor: default;
  display: inline-block;
  padding: 0.8em 2em 0.65em 2em;
  text-transform: uppercase;
  color: black;
}

nav a:hover {
  text-decoration: none;
  background-color: #eee;
}

main {
  max-width: 70em;
  margin: 0 auto;
  background-color: white;
  padding: 5em;
}

main > section {
  margin-top: 3em;
}

main > section:first-child {
  margin-top: 0;
}

section > section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15em, 1fr));
  gap: 1em;
}

article {
  border: 1px solid lightgray;
  padding: 1em;
}

article img, article video, article iframe {
  width: 100%;
  aspect-ratio: 4/3;
}

footer {
  max-width: 70em;
  margin: 0 auto;
  background-color: lightgray;
  padding: 1em 5em;
}

footer input, footer textarea {
  font-family: inherit;
  font-size: inherit;
  padding: 0.5em 1em;
  border: 1px solid gray;
  margin-bottom: 1em;
}

footer textarea {
  width: 100%;
  min-height: 10em;
  padding: 0.5em 1em;
  resize: vertical;
}

footer input[type=email] {
  width: 50%;
}

footer input[type=submit] {
  margin-left: 1em;
  background-color: whitesmoke;
}

footer input[type=submit]:hover {
  border-color: blue;
}

/* responsive design */
@media only screen and (max-width: 50em) {
  header, nav, main, footer {
    max-width: 100%;
  }
  header img, header h1 {
    display: block;
    margin: 0 auto;
  }
  header h1 {
    text-align: center;
  }
  main, footer {
    padding: 1em;
  }
}
@media only screen and (max-width: 35em) {
  nav {
    position: static;
    padding-right: 0;
  }
  nav a {
    display: block;
    text-align: center;
    padding-left: 0;
    padding-right: 0;
  }
}
/* publications */
pub-record {
  display: block;
  border: 1px solid lightgray;
  margin-top: 1em;
  padding: 1em;
}

pub-record a {
  border-radius: 0.3em;
  background-color: blue;
  color: white;
  padding: 0 0.3em;
}

pub-record a:hover {
  text-decoration: none;
  background-color: darkblue;
}

/*# sourceMappingURL=main.css.map */