img.startbild {
  width:25rem;
  float: left;
  margin-right:0.3rem
}

img.tblbild {
  min-width:15rem;
}

img.middleimg {
  display:block;
  margin:auto;
  max-width:98%;
}

.installtbl {
  border:1pt solid green;
  border-collapse: collapse;

  td, th {
    border:1pt solid green;
    padding:0.2rem;
  }

  th {
    background-color:lightgreen;
  }
} /* .installtbl */