.bouton-joindre{

    display: inline-block;

    padding: 10px 20px;

    background-color: blue;

    color: white;

    cursor: pointer;

    border-radius: 5px;
}
.combo-options {
    position: absolute;
    width: 100%;
    max-height: 180px;
    overflow-y: auto;
    border: 1px solid #f41212;
    border-radius: 6px;
    background: #fff;
    display: none;
    z-index: 999;
    color: black;
}

.combo-options div {
    padding: 10px;
    cursor: pointer;
}

.combo-options div:hover {
    background: #f91717;
    color: #fff;
}