/* Arbeitsdatei auf der Basis von 
  https://www.w3.org/TR/wai-aria-practices-1.1/examples/accordion/accordion.html
 */

.accordion {
background-color: red;
}

.accordion > * + * { /* was nicht gerade im Fokus ist? */
background-color: blue;
}

.accordion-trigger {
background-color: pink;
    border: 0;
    color: hsl(0, 0%, 13%);
    display: block;
    position: relative;
}

.accordion dt:first-child .accordion-trigger {
    border-radius: .3em .3em 0 0;
}

.accordion-trigger:focus,
.accordion-trigger:hover {
    background: hsl(0, 0%, 93%);
}

.accordion-icon {
    border: solid hsl(0, 0%, 62%);
    border-width: 0 2px 2px 0;
    height: .5rem;
    position: absolute;
    right: 1.5em;
    top: 50%;
    transform: translateY(-60%) rotate(45deg);
    width: .5rem;
}

.accordion-trigger:focus .accordion-icon,
.accordion-trigger:hover .accordion-icon {
    border-color: hsl(0, 0%, 13%);
}

.accordion-trigger[aria-expanded="true"] .accordion-icon {
    transform: translateY(-50%) rotate(-135deg);
}

.accordion-panel {
    margin: 0;
    padding: 1em 1.5em;
}

fieldset {
    border: 0;
    margin: 0;
    padding: 0;
}

input {
    border: 1px solid hsl(0, 0%, 62%);
    border-radius: .3em;
    display: block;
    font-size: inherit;
    padding: .3em .5em;
}