:root {
	interpolate-size: allow-keywords;
}

.Aufklappinhalt details {
  transition: height 0.5s ease;
  overflow: hidden;
  height: calc(26px + 1.5vw)
}

.Aufklappinhalt details[open] {
	height: auto; /** ging früher nicht, erst mit interpolate-size: allow-keywords; **/
  overflow: hidden;
	/** height: 270px;  **/
}

.Aufklappinhalt ::details-content {
  opacity: 0;
  transition: height 0.5s ease;
}
.Aufklappinhalt details[open]::details-content {
    opacity: 1;
	height: auto;    
}



.Aufklappinhalt summary {
	list-style: none;
  cursor: pointer;
  position: relative;
  right: 0px;
  top: -0px;
  float: none;
  padding-left: 10px;
  padding-right: 10px;
  padding-top: 0px;
  padding-bottom: 0px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 0px;
  margin-bottom: 0px;
  margin-bottom: 0px;
  border-style: solid;
  border-color: #de2222;
  border-width: 2px 0px 0px 0px;
  background-color: #fff;
  opacity: 1.0;
  border-radius: 0px;
  box-shadow: 0 2px 3px rgba(0,0,0,0.0);
  color: #de2222;
  font-size:  calc(20px + 1.5vw);
  font-weight: 300;
  text-transform: uppercase;
  background-image: none;
  z-index: 1000;
  height: calc(26px + 1.5vw);
  line-height: calc(26px + 1.5vw);
  max-width:50em;
}
.Aufklappinhalt details[open] summary {
  background: #de2222;
  color: #000;
}
.Aufklappinhalt summary:hover {
  color: #000;
  background-color: #de2222;
}