.collapsible-item {
    direction: rtl;
    background-color: #2b2b2b;
    border-radius: 10px;
    border: 1px solid #444;
    margin-bottom: 14px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.15);
}

.collapsible-item-body {
    margin-top: 10px;
    margin-right: 10px;
    font-size: 15px;
    color: #e0e0e0;
    padding: 0 16px 16px;
}

.collapsible-item-heading {
    background-color: #3a3a3a;
    padding: 14px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background-color 0.3s ease;
}

.collapsible-item-heading:hover {
    background-color: #464646;
}

.collapsible-item-title {
    font-size: 14px !important;
    font-weight: 500;
    color: #e0e0e0;
    margin: 0;
}

.collapsible-item-title-link {
    font-size: 16px !important;
    font-weight: bold;
    color: #e0e0e0;
    text-decoration: none;
    margin-right: 2px;
}

.collapsible-item-title-link-icon .glyphicon {
    font-size: 18px !important;
    color: #ccc;
    transition: transform 0.3s ease;
}

.collapsible-item.open .collapsible-item-title-link-icon .glyphicon::before {
    content: "−";
}

.collapsible-item:not(.open) .collapsible-item-title-link-icon .glyphicon::before {
    content: "+";
}

.collapsible-item-title-link-icon .glyphicon {
    visibility: hidden;
}

.collapsible-item-title-link-icon .glyphicon::before {
    visibility: visible;
    display: inline-block;
}

.collapsible-item-collapse {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.4s ease-in-out, opacity 0.4s ease-in-out;
    opacity: 0;
}

.collapsible-item-collapse.show {
    opacity: 1;
}