a.menu-dropdown-button {
    display: block;
    width: 40px;
    text-align: center;
    padding: 5px;
    border: 1px solid var(--color-main);
    cursor: pointer;
}
a.menu-dropdown-button svg{
    fill: var(--color-main);
}
.meta-toc-fixed {
    display: none;
    position: fixed;
    left: 5px;
    top: 10%;
    z-index: 111;
}
.meta-toc-fixed.fixed {
    display: block;
}

.meta-toc-fixed .wrap-toc{
    display: none;
    max-height: 410px;
}
.meta-toc-fixed.fixed .toc-head .bi-caret-down-fill{
    display: none;
}
.meta-toc-fixed.fixed .toc-list {
    max-height: 350px;
    margin-top: 10px;
    padding-left: 15px;
}
.meta-toc-fixed.fixed .toc-list > li > a::before{
    left: -15px;
}

.wrap-toc {
    display: block;
    padding: 10px;
    background-color: rgba(213,229,245,0.95);
    width: 100%;
    margin-top: 2px;
    border: 2px solid var(--color-main);
    font-size: 13px;
    margin-bottom: 10px;
}
.wrap-toc .toc-head svg{
    fill: var(--color-main);
    margin-right: 10px;
}
.wrap-toc .toc-head{
    position: relative;
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: 600;
    color: var(--color-main);
    line-height: 1;
    cursor: pointer;
}

.meta-toc.fixed .wrap-toc{ width: 350px; display: none;}
.toc-list {
    margin-top: 20px;
    max-height: 500px;
    overflow-y: auto;
}
.toc-list li {
    list-style: none;
}
.toc-list li a{
    display: block;
    padding: 4px 0px;
    cursor: pointer;
    color: var(--color-main) !important;
}
.toc-list li a:hover,
.toc-list li a.active{
    color: red !important;
}

.toc-list > li > a {
    position: relative;
    font-size: 16px;
    font-weight: 500;
}
.toc-list > li > a::before{
    content: '\25be';
    display: block;
    position: absolute;
    width: 20px;
    height: 20px;
    left: -20px;
    top: 3px;
}

.toc-list > li > a:only-child::before { content: ''; }   

.toc-list ul{
    padding-left: 20px;
}
.toc-list > li > ul li a {
    font-size: 15px;
}