.collapsible {
    background-color: #88001b;
    cursor: pointer;
    padding: 18px;
    transition: 0.3s;
}

.collapsible:hover, .collapsible .active {
    background-color: #ec1c24;
}

.collapsible-content {
    background-color: #332c2f;
    padding: 0 18px;
    overflow: hidden;
    max-height: 0;
    transition: 0.4s;
}

.collapsible:after {
    content: "\02795";
    color: white;
    float: right;
    margin-left: 5px;
    transform: translateY(-8px);
}

.collapsible.active:after {
    content: "\2796";
}