@import url('https://fonts.googleapis.com/css2?family=EB Garamond');

:root {
  /*
   * https://farbenpalette.com/farbpalette-nr-1652/
   **/
  --body-color: #e7f0ed;
  --border-color: #7fb9c2;
  --copyright-color: #628ca6;
  --h1-color: #164f55;
  --h1-shadow-style: 0 1px 3px rgba(127,185,194,0.8);
  --h2-color: #7fb9c2;
  --text-color: #164f55;
  --scrollbarBG: #7fb9c2;
  --scrollbarBG-active: #164f55;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

html {
  background-color: black;
}

body {
  font-family: 'EB Garamond';
  overflow: hidden;
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  margin: 5px auto;
  border: 8px solid;
  border-color: var(--border-color);
  border-radius: 10px 60px;
  background-color: var(--body-color);
  height: calc(100% - 28px);
  width: 90%;
  max-width: 1460px;
  /*max-height: 910px;*/
}

header {
  position: relative;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  display: flex;
  height: 110px;
  padding: 10px;
  border-bottom: 1px solid;
  border-bottom-color: var(--border-color);
}
header .logo {
  position: absolute;
  top: 5px;
  left: 5px;
  width: 120px;
  height: 120px;
  padding: 0;
  margin-right: 10px;
  background-image: url('/images/swallow.png');
  background-size: contain;
}
header a:before,
header a:after {
  content: '';
}
header .content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  flex-direction: column;
  background-image: url('banner-tech.jpg'); /* Datei lokal speichern */
  background-size: cover;
  background-position: center;
  height: 100%;
  border-radius: 6px;
}

header .content h1 {
  padding: 0;
  color: var(--h1-color);
  text-shadow: var(--h1-shadow-style);
  cursor: default;
}

nav {
  /*visibility: hidden;*/
  border: 1px solid;
  width: 80%;
  margin: 0 auto;
}
nav a:before,
nav a:after {
  content: '';
}
nav .navbar-nav {
  display: flex;
  justify-content: space-around;
}
nav .navbar-nav .nav-link,
nav .navbar-nav .nav-link.inactive,
nav .navbar-nav .nav-dummy {
  flex: 1;
  text-align: center;
  text-decoration: none;
  border: 1px solid transparent;
  background-color: #7d8e95;
  color: #fbe0c3
}
nav .navbar-nav .nav-link:hover {
  background-color: #ffffff;
  color: #7d8e95;
  border-color: #d3d3d3;
  cursor: pointer;
}
nav .navbar-nav .nav-link.active {
  background-color: #ffffff;
  color: #7d8e95;
  border-color: #d3d3d3;
}
nav .navbar-nav .nav-dummy {
  cursor: default;
}

main {
  /*visibility: hidden;*/
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  margin: 0 auto;
  padding: 0;
  text-align: center;
  width: 800px;
}
main hr {
  padding: 0;
  margin: 0 auto;
  margin-top: 18px;
  width: 80%;
  border-width: 1px;
  border-color: var(--scrollbarBG);
}
main h1 {
  margin: 0 auto;
  padding: 20px 0;
  font-size: 1.5em;
  width: 80%;
}
main h2 {
  margin: 0 auto;
  padding: 10px 0;;
  font-size: 1.2em;
  width: 80%;
}
main h3 {
  margin: 0;
  font-size: 1.1em;
  color: navy;
}
main div {
  margin-top: 20px;
  cursor: default;
}
main p {
  margin: 5px auto;
  padding: 0 5px;
  width: 80%;
}
main a {
  margin: 0;
  padding: 0;
  display: inline;
}
main ul {
  width: 70%;
  margin: 0 auto;
}
main div.chapter {
  margin: 0 auto;
  margin-top: 10px;
  width: 80%;
}
main .chapter_logo {
  width: 80%;
  padding: 0;
  margin: 0 auto;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  position: relative;
  border-radius: 10px;
}
main .chapter1.chapter_logo {
  aspect-ratio: 1024 / 683; /* 1.0 */
  background-image: url('/images/chapter_1.png');
}
main .chapter2.chapter_logo {
  aspect-ratio: 1024 / 683; /* 1.0 */
  background-image: url('/images/chapter_2.png');
}
main .center-horizontal img {
  display: inline-block;
  vertical-align: middle;
  margin-left: 10px;
}
main .topic {
  font-weight: bold;
  margin-right: 5px;
}
main .topic span {
  font-weight: normal;
}

footer {
  position: relative;
  display: flex;
  bottom: 5px;
  height: 30px;
  align-items: center;
  padding: 10px;
  border-top: 1px solid #d3d3d3;
}
footer .copyright {
  position: absolute;
  bottom: 5px;
  right: 5px;
  padding: 2px 5px;
  padding-top: 8px;
  font-size: 0.6em;
  border: 1px solid #ffffff;
  border-radius: 10px;
  background-color: var(--copyright-color);
  text-align: center;
  color: #ffffff;
  height: 20px;
  cursor: default;
}

.scrollable-content {
  overflow-y: scroll;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbarBG-active) var(--scrollbarBG);
  height: calc(100% - 11px);
  border-left: 8px solid;
  border-left-color: var(--scrollbarBG); 
  margin: 0;
  margin-top: 3px;
  padding: 0;
}
.scrollable-content a {
  display: inline-block;
  margin-top: 10px;
}

#cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #333;
  color: #fff;
  padding: 1em;
  display: none;
  justify-content: space-between;
  align-items: center;
}
#cookie-banner button {
  margin-left: 1em;
}