.jahr {
    display: block;
border-bottom: 2px solid #1c1c1c;
    padding: 10px;
    color: #757575;
font-family: 'Calibri' ;
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 1px;
    line-height: 10px;
    text-transform: lowercase;
text-align:center;
background:#1c1c1c;}

.klassen a {
    margin: 0 auto 20px auto;
border:1px solid black;
    padding: 20px 0;
    background: url(https://abload.de/img/dasding0242joa.png);
    color: #a6873d;
    size: 32px;
    font-weight: normal;
    line-height: 35px;
    text-align: center;
    text-transform: lowercase;}

 /* Style the buttons that are used to open and close the accordion panel */
.jahrx {
  background-color: #848880;
  color: #23211b;
margin:auto auto;
  width: 850px;
  text-align: center;
  transition: 0.4s;
font-family: 'Calibri';
font-size:18px;}


/* Style the accordion panel. Note: hidden by default */
.ausklapp {

  background-color: #8b8e87;
width:850px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
}