body {
    font-family:'Courier New', Courier, monospace;
    margin: 0px;
}

main {
    margin: auto;
    width: 50%;
}

main a {
    color: black;
}

header {
    background-color: black;
    color: white;
}

.header-content {
    margin: auto;
    width: 50%;
    text-align: end;
    padding: 5px;
}
header h3 {
    margin-top: 0px;
    display: inline;
    
}

header a {
    color: white;
}

.beitrag {
  border-bottom: solid 1px black;
}
.beitrag a {
  text-decoration: none;
  
}

.beitrag h3 {
  margin-bottom: 0px;
}

.beitrag p {
  margin-top: 0px;
  margin-bottom: 5px;
}

@media (max-width: 1080px) {
  main {
    width: 70%;
  }
  .header-content {
    width: 70%;
  }
}

@media (max-width: 800px) {
  main {
    width: 90%;
  }
  .header-content {
    width: 90%;
  }
}