.Karte {
    width: 100%;
    height: 1000px;
}
 
.Karte ul, .Karte li {
    margin: 0;
    padding: 0;
    list-style: none;
}
 
.Karte, .Karte input[type="radio"]:checked + label
{position: relative;}
 
.Karte li, .Karte input[type="radio"] + label
{display: inline-block;}
 
.Karte li > div, .Karte input[type="radio"]
{position: absolute;}
 
.Karte li > div, .Karte input[type="radio"] + label
{border: solid 1px #ccc;}
 
.Karte {
    font-family: Arial, Sans-serif;
    font-size: 1em;
    font-weight: 400;
    color: #404040;
    max-width: 700px;
    align-content: center;
}

.Karte li {vertical-align: top;}
 
.Karte li:first-child
{margin-left: 8px;}
 
.Karte li > div {
    top: 33px;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 0.5em;
    overflow: auto;
    background: hsl(51,100%,85%);
    color: black;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}
 
.Karte input[type="radio"] + label
{
    margin: 0 2px 0 0;
    padding: 0 6px;
    line-height: 32px;
    background: hsl(51,100%,95%);
    text-align: center;
    color: grey;
    border-radius: 5px 5px 0 0;
    cursor: pointer;
    -moz-user-select: none;
    -webkit-user-select: none;
    user-select: none;
}
 
.Karte input[type="radio"]:checked + label
{
    z-index: 1;
    background: hsl(51,100%,85%);
    border-bottom-color: hsl(51,100%,85%);
    color: black;
    cursor: default;
}
 
.Karte input[type="radio"]
{
    opacity: 0;
}
/* Veraltet, geht nicht mehr
 .Karte input[type="radio"] ~ div {display: none;}
 .Karte input[type="radio"]:checked:not(:disabled) ~ div  {display: block;}
NEU folgt*/
 
.Karte input[type="radio"] + label + div {
    display: none;
}

.Karte input[type="radio"]:checked + label + div {
    display: block;
}
 
 
.Karte input[type="radio"]:disabled + label
{
    opacity: .5;
    cursor: no-drop;
}
/*_____________________Neue Archivreiter, modern_______________________*/
.karteikasten {
    max-width: 700px;
    margin: 1em auto;
    font-family: Arial, sans-serif;
}

/* Tabs oben */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid #ccc;
}

.tabs input[type="radio"] {
    display: none;
}

.tabs label {
    padding: 0.4em 0.8em;
    background: hsl(51, 100%, 95%);
    border: 1px solid #ccc;
    border-bottom: none;
    border-radius: 6px 6px 0 0;
    cursor: pointer;
    font-weight: bold;
    color: #555;
}

/* Aktiver Tab */
#karte1:checked + label,
#karte2:checked + label,
#karte3:checked + label {
    background: hsl(51, 100%, 85%);
    color: black;
}

/* Contentbereich */
.content-wrapper {
    border: 1px solid #ccc;
    background: hsl(51, 100%, 85%);
    border-radius: 0 6px 6px 6px;
    padding: 1em;
    margin-top: -1px;
}

.content {
    display: none;
}

/* Sichtbare Inhalte */
#karte1:checked ~ .content-wrapper .content1 {
    display: block;
}

#karte2:checked ~ .content-wrapper .content2 {
    display: block;
}

#karte3:checked ~ .content-wrapper .content3 {
    display: block;
}