* {
  padding:0;
  margin:0; 
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  font-family: sans-serif;
  background: #000;
  box-sizing: border-box;
  color: white;
}

body {
  max-width: 85em;
  min-height: 100dvh;
  display: grid;
  font-size: 1rem;
  grid-template-rows: max-content auto;
  margin: 0 auto;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

.responsive {
  max-width: 100%;
  height: auto;
}

header .titelzeile { 
  grid-column: 1;
  grid-row: 1;
}

header .textnav {
  grid-column: 1;
  grid-row: 2;
}

header .titelbild { 
  grid-column: 1 / -1;
  grid-row: 2;
  width: 100%;
}

header .textnav ul {
  display: flex;
  list-style: none;
}

@media (min-width: 45em) {
header {
  display: grid;
  grid-template-columns: max-content 1fr;
  grid-template-rows: max-content max-content;
  column-gap: 0;
  row-gap: 0;
}

header .titelzeile { 
  grid-column: 1;
  grid-row: 1;
}

header .textnav {
  grid-column: 2;
  grid-row: 1;
}

header .textnav ul {
  display: flex;
  justify-content: flex-end;
  list-style: none;
}
}

header .textnav li {
  padding: 0 10px;
  border-right: 1px solid White;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 0.8rem;
  font-weight: bold;
}

header .textnav li a {
  display: block;
  text-decoration: none;
  color: #fff;
}

header .textnav li:hover {
  cursor: pointer;
}

header .titelbild img {
  width: 100%;
  height: auto;
  display: block;
}

header .abmelden {
  background: black;
  color: red;
  border: black;
  cursor: pointer;
}

main a {
  color: yellow;
  text-decoration: none;
  font-weight: bold;
}

p {
  padding: 8px 0;
}

main .ueberschrift {
  background: #000;
  padding: 10px;
  color: White;
}

main .mitte {
  text-align: center;
}

main .s10 {
  font-size: 0.8rem;
}