:root {
  --light: whitesmoke;
  --dark: #004aad;
}
body {
  background: var(--light);
  color: var(--dark);
  font-family: sans-serif;
  line-height: 1.4;

  margin: 0;
  padding: 0;
}

main {
  margin-inline: auto;
  max-width: 55rem;
  padding-inline: 1rem;
}

main > * + * {
  margin-block-start: 2rem;
}

a {
  color: var(--dark);
}

header {
  position: sticky;
  top: 0;
}

header, footer {
  background: var(--dark);
  color: var(--light);

  padding-block: 0.5rem;
  padding-inline: 2rem;
}

header span {
  font-weight: 700;
}

header a, footer a {
  color: var(--light);
}

header ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

h1, h2, h3 {
  line-height: 1;
}
h1 {
  margin-block: 0.67rem;
  font-size: 2rem;
}
summary h3 {
  display: inline;
  line-height: 1.5;
}
#lina, #themen {
  font-weight: 900;
}

#hero {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

#hallo {
  flex-basis: 0;
  flex-grow: 999;
  min-inline-size: 50%;
  justify-self: center;
}
#linimg {
  flex-basis: 20rem;
  flex-grow: 1;
}

img, picture {
  display: block;
  max-width: 100%;
  min-width: 320px;
}

#hero img {
  margin-top: 1.3em;
  margin-bottom: 1.3em;
  border-radius: 10px;
}

#hero h1 {
  font-weight: 300;
}

.repel {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between
}

.cluster {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 2rem;
}

figure {
  border-inline-start: 3px solid var(--dark);
}

blockquote, figcaption {
  margin-inline: 1.5rem;
}

blockquote > p {
  font-style: italic;
}

figcaption::before {
  content: "— " / "- ";
}

details {
  padding: 2px 6px;
  margin-bottom: 1em;
}

details summary::marker,
:is(::-webkit-details-marker) {
  content: "+ ";
  font-family: monospace;
  color: var(--dark);
  font-weight: bold;
}

details[open] summary::marker {
  content: "− ";
}