input[type=checkbox] {display:none}

.accordeon-contenu {
    width: 100%;
    display: grid; 
    transition:grid-template-rows .4s ease-in-out;
    grid-template-rows: 1fr 0;
    overflow: hidden;
}

.accordeon-cadre label {
    margin-top: 1%;
    cursor : pointer;
    display: flex;
    background-color: #D1D1D1;
    border-radius: 8px;
    color: black;
    font-weight: bold;
    padding: .5rem;
}	
  
.accordeon-cadre label:before {
    content: '►';
    margin-right: 1rem;
}
    
.accordeon-cadre input:checked ~ .accordeon-contenu label:before {
    content: '▼';
}
  
.accordeon-cadre input:checked ~  .accordeon-contenu {
    grid-template-rows: 1fr auto;
}